Tektronix 326 Instruction Manual

INSTRUCTION MANUAL

Tektronix, Inc. P.0. Box 500 Beaverton, Oregon 97005 Serial Number

070- 1578-00

273

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kmanship for one year. An'

warranty should be taken up

K J ^|d Engineer or representative,

displac e m e n t parts should be

OIMIX Field Office or representative

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U.S.A. and foreign TEKTRONIX products covered by U.S. and foreign patents and/or patents pending.

TEKTRONIX is a registered trademark of Tektronix, Inc.

326 (SN 300500-up)

SECTION 1

SECTION 2

SECTION 3

SECTION 4

TABLE OF CONTENTS

SPECIFICATION

Page

SECTION 4 MAINTENANCE (cont)

Page

Introduction

1-1

Recalibration

4-1

Electrical Characteristics

1-1 Troubleshooting Aids

4-1

Vertical Amplifier

1-1

Troubleshooting Equipment

4-1

Time Base

1-2

Replacement Parts

4-1

Calibrator

1-2

Assembly and Component Replace

External Horizontal Input

1-2

ment

4-2

External Blanking

1-2

1 nstru ment R epackag i ng

4-6

CRT Display

1-3

Power Source 1-3

Internal Battery Supply 1-3 Environmental

1-3

SECTION 5

PERFORMANCE CHECK/ADJUSTMENT

Introduction

5-1

OPERATING INSTRUCTIONS

Test Equipment Required

5-1

Short-Form Performance Check

Power Source Requirements

2-1

and Index

5-2

Function of External Controls,

Performance Check Procedure

5-4

Connectors, and Indicators

2-3

Short-Form Adjustment Procedure

Instrument Familiarization

2-5

and Index 5-12

Adjustment Procedure

5-13

CIRCUIT DESCRIPTION

Introduction

3-1

SECTION 6

ELECTRICAL PARTS LIST

Basic Block Description 3-2

MAINTENANCE

SECTION 7 DIAGRAMS, CIRCUIT BOARDS

Introduction

4-1

General

4-1

Cleaning

4-1

SECTION 8

MECHANICAL AND REPACKAGING

Semiconductor Checks 4-1

PARTS ILLUSTRATIONS ACCESSORIES

SONY/TE K TRONIX 326 Oscilloscope.

326 (SN 300500-up)

326 SPECIFICATION

Section 1—326 (SIM 300500-up)

Introduction

The SONY/TEKTRONIX 326 Oscilloscope is a solid-

state portable instrument that combines small size and light weight with the ability to make precision waveform measurements.

A dual-trace DC to 10 MHz vertical system provides

calibrated deflection factors from 0.01 Volt/Div to

10 Volts/Div (0.001 Volt/Div minimum with reduced frequency response).

The trigger circuit provides stable triggering over the full vertical bandwidth. A 300 ns delay line in the vertical system allows the operator to view the portion of the waveform on which triggering occurs.

The horizontal deflection system provides calibrated sweep rates from 1 jUs/Div to 1 s/Div. A 10X magnifier extends the sweep rate to 0.1 jiis/Div.

The 326 can be operated from internal battery, an external DC source, or from the AC line (with battery

charger attached).

The following electrical characteristics apply over an ambient temperature range of +20°C to +30° C (+68°F to +86°F). Warmup time for the accuracies given is approxi mately 10 seconds.

CHARACTERISTICS

VERTICAL AMPLIFIER

Deflection Factor

Ranges: 10 mV/Div to lO V/Div in X I Gain and

1 mV/Div to 1 V/Div in X10 Gain. 10 steps in a 1-2-5

sequence. Accuracy within 3% over the calibrated range.

Variable: Variable between calibrated deflection factor

settings. Extends the highest deflection factor to at least

25 V/Div.

Attenuator Compensation: +1%, —1%, or less, 0°C to +55°C (+32°F to +131°F). +2%, -2%, or less, -15°C to 0°C (+5°Fto+32°F).

Frequency Response

Bandwidth (Variable Volts/Div at CAL, 4 division

reference) direct coupled: IX Gain, DC to at least

10 MHz (upper —3dB point) with the P6049A Probe. Capacitively coupled, 4 division reference: from 10 Hz or less (lower —3 dB point) at all deflection factors. 1 Hz or less with the P6049A Probe.

Step Response (risetime), 4 division step input: 36 ns or less in XI Gain and 72 ns or less with X10 Gain.

Aberrations: +2.5%, —2.5% with total of 4% or less in all modes except ADD ALG. +3%, —3% with total of 6% or less in ADD ALG Mode.

Input

Maximum Voltage: 500 volts direct coupled (DC + peak AC) or capacitively coupled DC voltage.

Resistance: 1 M£2, within 2%, direct and 10 M£2, within 2%, with the P6049A Probe.

Capacitance: 47 pF within 4 pF direct and 13.5 pF or

less with the P6049A Probe.

Amplifier

Linear dynamic range in Added Mode: Equal to or greater than 8 times the Volts/Div setting for 10% distortion.

Common-Mode Rejection: At least 20:1 at 2 MHz for a common-mode signal of 80 mV peak-to-peak, Volts/Div set at 10 mV and CH 2 set for maximum CMRR at 50 kHz and 10 mV.

DC Drift

With Time (short term): 0.2 div or less during any minute within the first hour after a 10 second warmup (with temperature and line voltage constant).

1-1

Chopped Mode

Repetition Rate: 110 kHz within 20%.

Specification—326 (SN 300500-up)

TIME BASE

Sweep Time/Div

Calibrated Range: 1 s/Div to 1 /is/Div in 19 steps in a

1-2-5 sequence. 10X magnifier extends the displayed

sweep time to 0.1 jus/Div.

Accuracy, XI Gain: within 3% over the center eight

graticule divisions from 1 jus/Div to 0.2 s/Div, increasing to 4% from 0.5 s/Div to 1 s/Div.

X10 Gain: within 5% over any 2 division interval within the center eight graticule divisions 1.0 jus/Div to 20 ms/Div. Increasing to 6% at 0.5 jus/Div, 0.1 jus/Div,

0.1 s/Div, and 50 ms/Div.

Variable: at least 2.5:1.

Trigger

Internal: DC to 10 MHz on signals causing 1.0, or more,

division of vertical deflection and to approximately

1.0 MHz on signals causing 0.3 division of vertical

deflection.

External: DC to 10 MHz on signals of 500 mV or more,

decreasing to approximately 1.0 MHz on signals of

150 mV.

Coupling: AC attenuates signals below 30 Hz; LF REJ attenuates signals below 50 kHz.

External Level Range: Atten at X I, +0.8 V to -0.8 V;

Atten at X10,+8 V to —8 V.

Maximum Input Voltage: 300 V (DC + peak AC).

CALIBRATOR

Output

Voltage Accuracy (into a load of 1 M£2 or greater):

0.5 V, within 1% from +20°C to +30°C (+68°F to

+86°F), decreasing to within 2% from -15°C to +20°C

(+5°F to +68° F) and +30°C to +55°C (+86° F to

+ 131°F).

Duty Cycle: 40% to 60%.

Resistance: Approximately 10 k£2.

EXTERNAL HORIZONTAL INPUT

Deflection Factor

Horiz Mag X10, Ext Atten IX : 15 mV/Div to 25 mV/Div.

Horiz Mag off. Ext Atten IX : 150 mV/Div to 250 mV/Div.

Horiz Mag X10, Ext Atten 10X: 150 mV/Div to 250 mV/Div.

Horiz Mag off. Ext Atten 10X: 1.5 V/Div to 2.5 V/Div.

Bandwidth

DC to at least 200 kHz (upper —3 dB point).

Dynamic Range

At least 20 divisions (+2.5 volts to —2.5 volts) with EXT TRIG OR HORIZ ATTEN switch set to X10, and EXT HORIZ Variable control set to CAL.

Variable Range

At least 10:1.

EXTERNAL BLANKING

Sensitivity

DCCoupled: +5 volts to +20 volts.

Usable Frequency Range

To approximately 100 kHz.

Input Voltage

1-2

Maximum: 50 V (DC + peak AC).

Specification—326 (SIM 300500-up)

CRT DISPLAY 315 jjlA cathode current (full intensity)

Graticule Area Calibrator waveform displayed: 2.5 hours or greater.

8X10 one-fourth inch divisions.

6 divisions of 10 MHz signal displayed: 1.5 hours or greater. /

Geometry

Within 0.1 division.

POWER SOURCE

Power Line

Voltage Ranges (Battery Charger): 90 V to 136 V and 180 V to 272 V.

Frequency (Battery Charger): 48 Hz to 440 Hz.

Maximum Power Consumption: 35 VA, with 136 volt AC line, a 10 MHz 6-division signal displayed, full intensity, and full charge rate.

External DC

Voltage Range: +9 V to +32 V.

Maximum Power Consumption: 12 watts, with 10 MHz, 6-division signal displayed and full intensity.

ENVIRONMENTAL

Temperature

Nonoperating: —40°C to +75°C (—40°F to +167°F).

Operating: -15°Cto+55°C (+5°F to+131°F).

Charging: 0°C to +40°C (+32°F to +104°F).

Altitude

Nonoperating: to 50,000 feet.

Operating: to 15,000 feet. Maximum allowable ambient

temperature decreases by 1°C/1000 feet from 5,000 feet

to 15,000 feet.

INTERNAL BATTERY SUPPLY

Battery

9 size C, 1.5 AH NiCd cells.

Charge Time

MECHANICAL

Construction

Chassis Aluminum Alloy Panel Aluminum Alloy with Anodized

Finish

Cabinet Blue Vinyl-Coated Aluminum

Full Charge (instrument off): at least 16 hours.

Operating Time

1.5 to 4 hours, depending on control settings and temperature: +20°C to +25°C (+68°F to +77°F) charge temperature and +10°C to +30°C (+50°F to +86°F) operating temperature;

15 jiiA or less cathode current

Calibrator Waveform displayed: 4 hours or greater.

6 divisions of 10 MHz signal displayed: 1.8 hours or greater.

Dimensions and Weights Height

4.0 in

10.2 cm

Width with handle 8.7 in

22.2 cm

Depth, handle not extended

With charger 15.0 in 38.1 cm Without charger

12.2 in 31.0 cm

Depth, handle extended

With charger

18.2 in 46.2 cm

Without charger

15.8 in

40.1 cm

Net weight without accessories

With charger «13lb

~5.9 kg

Without charger

«10 lb

^4.5 kg

Domestic shipping weight

«21 lb ~9.5 kg

Export-packed weight

~29lb

~13.1 kg

1-3

Section 2-326 (SN 300500-up)

OPERATING INSTRUCTIONS

(

I I

I

General

This section explains power source requirements,

describes the functions and uses of controls and connectors,

and gives first time and general operating information.

POWER SOURCE REQUIREMENTS

WARNING I

The cells used in the battery pack are capable of

delivering a large amount of energy in a short time.

Rings, watch bands and other metallic items that

might short circuit the battery can rapidly become hot enough to cause severe burns.

General

The 326 may be powered from either the internal

Battery Pack (nine NiCd cells connected in series) or on an external DC voltage source ranging from +9 volts to +32 volts.

The internal battery pack is removable and may be charged (while in the instrument or externally) by the battery charger.

Typical operating time from a fully charged battery pack is approximately 4 to 5 hours. Actual operating time varies with sweep rate, the displayed signal frequency and amplitude, display brightness, and the ambient temperature during cell charge.

Internal Battery Operation

Sliding the power source switch to the BATT OR AC ADPT position connects the internal battery to the 326 front-panel POWER switch. Internal battery powered operation is not possible with the source switch in the EXT DC POWER position.

Internal battery powered operation should be discon tinued after the LOW BATT lamp starts flashing. The battery should immediately be put on charge or the battery pack should be replaced with a fully charged pack.

If the internal battery-powered operation is continued after the LOW BATT lamp starts flashing, the trace will disappear in a short time and the LOW BATT lamp will stop flashing; damage to some of the NiCd cells might result.

Cell Removal (see Fig. 2-1)

1. Remove the three machine screws from the left edge

of the Battery Pack front panel.

2. Remove two machine screws from the rear (same

edge as those removed from the front) panel.

“ -.terminal from side connector.

** 7. Unsolder positive battery tab and v. remove cells as a unit.

If the cells must be removed from the battery pack, use

the following procedure:

Fig. 2-1. Battery Pack cell removal.

\

2-1

Operating Instructions—326 (SN 300500-up)

3. Remove the four machine screws that extend through

the pack.

4. Carefully unsolder the copper strap and bare wire

from the connector lug at the front end.

5. Unsolder connector lug from side-panel conductor at

the rear of the pack.

6. Lift the side away from the pack.

7. Unsolder the copper strap from the negative

connector lug.

8. Carefully lift the cells (as a unit) away from the case.

Do not allow the copper cell tabs to contact each other

while removing cells.

External DC-Powered Operation

The instrument can be powered by an external DC

source between +9 and +32 volts. The Power Source switch

must be in the EXT DC POWER position and the external supply must be connected to the + (red) and — (black) connectors on the rear panel of the instrument. The external DC source will not charge the internal battery. For some Serial Numbers, the LOW BATT indicator lamp does not function during External DC powered operation. If incorrect operation occurs, check the external DC power source.

Applying external DC power with the polarity reversed will cause the Power Regulator fuse, F870 on the Horizontal circuit board, to open.

Battery Charger

The internal battery pack may be charged either within or outside the instrument. When charging the battery pack inside the instrument the battery charger attaches to the rear of the instrument.

Instrument operation can be continued while the internal battery is charging or a spare battery pack can be charged while the instrument operates on internal battery.

The battery pack may be charged in the instrument while the instrument is operating from an AC source.

Slip-on connectors in the battery charger must be connected to match the line voltage to be used. The internal fuse must be changed when the AC line voltage is changed. Use a 0.4 A fuse for 115-volt operation and a 0.2 A fuse for 230-volt operation. See Fig. 2-2.

Jl. Remove three machine screws securing plastic cover to I charger.

2. Remove plastic cover.

^ ' ^'1 L r

Connect the two white leads (with square terminal con-

II nectars) to either the 115-volt or the 230-volt square-pin (terminals.

Fig. 2-2. Location of line-voltage selection terminals.

2-2

Operating Instructions—326 (SIM 300500-up)

Battery Charging

Although the battery contained in the 326 is charged

before packaging, it should be recharged for 16 hours at

FULL CHG rate before being put into service.

every 15 charge/discharge cycles. Once the battery has been fully charged, the charge rate should be set to TRICKLE. The trickle charge rate provides only enough current to offset the internal losses, and will keep the battery fully charged.

(

The charging characteristics of NiCd cells vary with cell

temperature during charge. The energy delivered is inversely

proportional to the cell temperature during the first

three-fourths to seven-eighths of the full charge cycle.

If NiCd cells become reverse charged, their capacity for recharging can be impaired or destroyed. An imbalance between cells in a battery can develop during operation or

during partial charging. It is possible for the imbalance to

become so great that during discharge the weakest cells completely lose their charge and become reverse charged by the current from the charged cells.

To avoid reverse charging one or more cells, fully charge the battery after each discharge (16 hours) on FULL CHG. Although partial recharge is not recommended as a

common practice, occasional recharges can be tolerated. About 30 to 45 minutes of operating time can be expected for each hour of charge.

In addition, the battery should be charged at the FULL

CHG rate for 24 hours approximately once a month or

FUNCTION OF EXTERNAL CONTROLS,

CONNECTORS AND INDICATORS

General

The controls, connectors, and indicators listed are contained on the external surfaces of the 326, and are used during routine oscilloscope operation. All other controls are inside the instrument covers and should be adjusted only during instrument calibration.

The external control, connector, and indicator nomen clature is shown in CAPITAL letters wherever it appears in this manual.

Front Panel (see Fig. 2-3)

POWER ON-OFF Two position toggle switch.

Connects the oscilloscope circuitry to the power source. Does not

affect battery charging.

Fig. 2-3. 326 Front panel.

2-3

Operating Instructions—326 (SN 300500-up)

LOW BATT

Indicator lamp. During battery operation, the lamp flashes to indicate that internal battery vol

Vert Position

tage is low. If the battery voltage is sufficiently low the lamp w ill stop flashing and the instrument will stop operating. To distinguish this condition from equipment failure, connect the charger at FULL CHG

X10 GAIN

rate for a few minutes. Then disconnect the charger and check for oscilloscope operation and LOW

BATT indicator lamp operation.

(For some serial numbers the LOW

CH 2

BATT Indicator lamp does not

function when External DC power

Mode Selector

source is used.)

CH 1

CH 1 VOLTS/DIV

Selects calibrated deflection factors

from 0.1 Volts/Div to 10 Volts/Div

CH 2

(Variable in CAL position and X10

GAIN pushed in). When set to the

5 DIV CAL position, a 5-division

square-wave calibrator signal is

displayed.

ALT

Variable

Varies Volts/Div between calibrated

steps. Range is at least 2.5X. The

uncalibrated range is extended to

CHOP

25 Volts/Div.

ADD

CH 1 Input Coupling Switch

CH 2 INVERT

AC

Capacitively couples the input

signal to the input attenuator.

GND

Grounds the input attenuator (both

pushbuttons out) and connects the

signal through 470 k£2 and

0.0185 /zF to ground.

NOTE

The GND configuration (both AC

and DC buttons out) provides a precharge circuit. The input coup

ling capacitor charges to the DC

level of the input signal. This pre

charge feature prevents offscreen

deflection which occurs when

connecting a signal to the input

with the AC button pushed. Always

TIME/DIV

use the precharge feature before

connecting the signal to the input

(with both buttons out, connect the signal to the input and then

push the AC button).

Variable

DC

2A

Couples the input signal directly to

the input attenuator.

Ve rtically adjusts the display position.

Pull the POSITION control knob to increase the vertical gain by a factor of 10. Extends the calibrated deflection factor to 1 mV/Div. Bandwidth is reduced to 5 MHz.

VO LT S /DIV , Variable, input coupling switches, POSITION and X10 GAIN provide the same func tions as those of CH 1.

Displays channel 1 only.

Displays channel 2 oniy.

Displays channel 1 and channel 2 alternately. When both channels are displayed, the channels are switched electronically during beam retrace interval.

Displays channel 1 and channel 2 simultaneously.

Displays the algebraic sum of the signals applied to channels 1 and 2. (

Channel 2 display is inverted with the INVERT switch in the OUT position.

Selects the horizontal sweep rate. Sweep rates are 1 /zs/DIV to

1 s/DIV in a 1-2-5 sequence, plus an

EXT HORIZ position. In the EXT HORIZ position horizontal deflec tion depends on signal applied to the EXT HORIZ INPUT connector on the side panel.

NOTE

For external sweep, the EXT

Trigger Selector button must be pushed.

Varies the TIME/DIV between cali brated steps. Range is at least 2.5X. The uncalibrated sweep rate is extended to 2.5 s/Div. With the TIME/DIV selector in the EXT HORIZ position, the Variable ( control attenuates the external ' horizontal signal from IX to 10X.

POSITION X10 HORIZMAG

EXT (pushbuttons)

AC

DC

I NT (pushbuttons)

AC

LF REJ

CH 1-NORM (pushbuttons)

LEVEL/SLOPE

Horizontally positions the display. Pull the POSITION X10 HORIZ MAG knob to increase the horizon tal gain by a factor of 10 (the sweep expands from graticule center). X10 magnification extends the fastest displayed sweep rate to .IjUs/DIV.

Triggers the sweep from a trigger signal applied to the EXT HORIZ INPUT (side panel).

Capacitively couples the external trigger signal. Low frequency cutoff

is about 30 Hz.

Triggers on DC level changes as well

as AC signals.

Triggers the sweep on the signal applied to the Vertical Input(s).

Capacitively couples the internal trigger signal. Low frequency cutoff is about 30 Hz.

Capacitively couples the internal trigger signal. Makes high frequency triggering more dependable by

rejecting frequency components

below about 50 kHz.

Selects the internal triggering source. NORM button selects an internal signal, dependent on the position of the Mode switch. CH 1 button selects Channel 1 only as the trigger source.

Selects the level and slope of the displayed signal on which triggering occurs. In the fully ccw position, triggering is automatic on the positive-going (+) trigger signal. In the fully cw position, triggering is automatic on the negative-going (-) triggering signal. Between the two extreme positions the control

selects the triggering level on either the + or — slope. AUTO triggering provides a baseline in the absence of triggering signal, but triggering is normal on recurrent signals.

Operating Instructions—326 (SN 300500-up)

INTENSITY Adjusts the display brightness.

Display brightness affects battery operating time.

FOCUS Adjusts for a sharp, well defined

trace. Interacts somewhat with the INTENSITY control.

.5 V CAL OUT Source of calibration square wave.

0.5 volts, peak to peak.

Side Panel

EXT TRIG OR HORIZ

INPUT Apply external trigger or external

horizontal input signal to this BNC connector.

ATTX1-X10 Selects attenuation factor (XI or Switch X10) for the external signal.

INSTRUMENT FAM ILIARIZATION

This procedure provides a means of quickly checking the

operation of the 326.

Preliminary

Preset the front-panel controls as follows:

LEVEL/SLOPE

+AUTO AC -L F REJ AC CH 1-NORM

CH 1 TIME/DIV

1 ms

Variable

CAL Horiz POSITION midrange

X10 HORIZ MAG pushed in

Mode

CH 1 CH 1 and CH 2

VOLTS/DIV

5 DIV CAL

Variable

CAL

Input AC—DC DC Vertical POSITION midrange

X10 GAIN

pushed in INTENSITY

midrange FOCUS

midrange

Set rear-panel EXT DC POWER-BATT OR AC ADPT

switch to BATT OR AC ADPT.

1. Check Battery Charge Level

a. Switch POWER switch to ON.

2-5

Operating Instructions—326 (SN 300500-up)

b. CHECK-The LOW BATT Indicator should not flash.

c. If LOW BATT Indicator flashes, charge the battery pack, replace the battery pack with a fully charged pack, or operate on an external DC supply. Proceed with the checkout.

d. The lower portion of the calibrator signal should

appear within the graticule area. Adjust FOCUS and

INTENSITY for suitable viewing. Vertically position the bottom of the display to the bottom graticule line. Horizontally position the start of the display to the first graticule line (left).

2. Check Vertical Deflection Factor

a. CHECK—The amplitude of the displayed square wave

should equal 5 divisions.

b. Pull out the CH 1 X10 VERT GAIN control knob.

c. CHECK—The display amplitude should equal 5

divisions.

3. Check Probe Compensation

a. Connect a P6049A Probe to the CH 1 VERT INPUT

connector. Set CH 1 VOLTS/DIV selector to .01 V, TIME/DIV to 0.5 ms, and Mode to CH 1.

b. Touch the probe tip to the CAL OUT jack and check

the display for proper probe compensation (see Fig. 2-4).

Fig. 2-4. Probe Compensation.

c. If necessary, adjust the probe compensation for the

best front corner response to the square waves as shown in

Fig. 2-4.

4. Check Trigger Sensitivity and Polarity

a. Set CH 1 VOLTS/DIV selector to 1 volt, TIME/DIV to 1 ms, push I NT AC and CH 1 buttons. Pull out the CH 1 X10 VERT GAIN control and apply the CAL OUT signal to CH 1 VERT INPUT and to EXT TRIG OR HORIZ

INPUT by means of patch cords.

b. Adjust the CH 1 VOLTS/DIV Variable control for a 3-division display amplitude.

c. CHECK—For stable triggering on the + slope and on the — slope of the displayed signal (turn the LEVEL/

SLOPE control throughout its range and check for proper

triggering). Check for stable triggering in both + AUTO and

- AUTO.

d. Connect the CAL OUT signal to CH 2. Switch CH 2

VOLTS/DIV to 1 V, Mode to CH 2, and CH 1-NORM to

NORM.

e. Adjust the CH 2 VOLTS/DIV Variable control for a ^

3-division display amplitude.

f. CHECK—For stable triggering on the + slope and on the — slope of the displayed signal, including the + AUTO and — AUTO positions.

g. Reconnect the CAL OUT signal to both CH 1 VERT

INPUT and EXT TRIG OR HORIZ INPUT.

h. Switch Mode to CH 1, TRIGGERING to EXT AC,

CH 1-NORM to CH 1.

i. CHECK—For stable triggering on the + slope and —

slope, including the+ AUTO and — AUTO positions.

5. Check External Horizontal

NOTE

In the Ext Horiz mode, the internal sweep is disabled

and the CRT beam is unblanked. Consequently, a

brighter than normal stationary spot will appear on

the CRT face unless an external sweep is applied. The

INTENSITY setting should be changed to reduce the

brightness level consistent with good viewing.

2-6

Operating Instructions—326 (SN 300500-up)

a. Apply the CAL OUT signal to the EXT TRIG OR

HORIZ INPUT connector using a patch cord.

b. Set the EXT TRIG OR HORIZ ATTEN to IX.

c. Set the TIME/DIV to EXT HORIZ and TRIG

GERING Coupling to EXT AC.

d. Check for two spots separated by approximately 2.5

divisions.

e. Set the EXT TRIG OR HORIZ ATTEN to 10X.

Horizontally center the display.

f. Note that the distance between the two spots

decreases by a factor of 10.

Fig. 2-5. Ground connection required to charge Battery Pack outside of instrument.

g. Pull the X10 HORIZ MAG. Position horizontally as

necessary to keep the display approximately centered. battery pack that it would be in if charging the battery

pack in the instrument).

h. Note that the distance between spots increases by a

factor of approximately 10.

Charging the Battery (Battery Pack out of the

Instrument)

Plug the battery charger banana plugs into the battery pack banana jacks, being sure that the polarity is correct (mount the charger in the same position relative to the

Connect a banana-banana patchcord from the negative

(gnd) battery pack output terminal to the negative (gnd)

external DC supply banana jack. See Fig. 2-5.

Plug the AC power cord into the charger and connect to

the power line. Set the FULL CHG—TRICKLE switch to

FULLCHG.

2-7

Section 3—326 (SN 300500-up)

CIRCUIT DESCRIPTION

Introduction

This section of the manual contains a description of the circuitry used in the 326 Oscilloscope. A brief description of the instrument block diagram (preceding the foldout circuit schematics) is followed by a somewhat more

detailed description of the individual blocks. Since the Power Regulator contains unique circuits, additional detail

is provided.

If more information is desired on the commonly used

circuits, refer to the following textbooks:

TEKTRONIX Circuit Concepts Books (order from your

local TEKTRONIX Field Office or representative).

Cathode Ray Tubes, TEKTRONIX Part Number

062-0852-01.

Horizontal Amplifier Circuits, TEKTRONIX Part

Number 062-1144-00.

Oscilloscope Trigger Circuits, TEKTRONIX Part

Number 062-1056-00.

Power Supply Circuits, TEKTRONIX Part Number

062-0888-01.

Sweep Generator Circuits, TEKTRONIX Part Number

062-1098-01.

Vertical Amplifier Circuits, TEKTRONIX Part Number

062-1145-00.

Phillip Cutler, "Semiconductor Circuit Analysis", McGraw Hill, New York, 1964.

Lloyd P. Hunter, "Handbook of Semiconductor Elec tronics", second edition, McGraw Hill, New York, 1962.

Millman and Taub, "Pulse, Digital, and Switching Wave forms", McGraw Hill, New York, 1965.

BLOCK DIAGRAM DESCRIPTION

Intrument Block

The block diagram shows only the basic interconnec

tions between individual blocks (see the foldout Block

Diagram preceding the Schematic foldouts at the rear of the manual).

Signals applied to the vertical inputs are applied to the Vertical Preamp through the input coupling selector switch and the input step attenuators.

The Vertical Preamps contain gain, balance, and posi

tioning controls as well as controls for setting the CRT vertical deflection plate DC levels.

A five division calibration signal is introduced into each channel via the input attenuators.

Signal is picked off at channel 1 preamp output for use

as triggering signal.

The two vertical channels are switched electronically by

the channel switching multi and gating diodes to provide five modes of operation: CH 1, CH 2, ALT, CHOP, and ADD.

Signal is picked off ahead of the delay line to provide

trigger signal from whichever signal is being gated through to the output amplifier.

A 300 ns delay line provides sufficient signal delay to

the CRT vertical deflection plates to allow observation of the transition which triggers the sweep.

The Output Amplifier provides high frequency compen sation, and the current capability to drive the vertical

deflection plates.

The Trigger Preamp selects the trigger source and amplifies the signal selected to a level compatible with the

trigger generator input.

3-1

Circuit Description—326 (SN 300500-up)

The trigger source (either the signal from the Trigger Preamp or the EXT TRIG) and the method of coupling are selected in the Trigger Generator. The trigger signal selected

is coupled to a DC comparator amplifier to select the point on the signal at which triggering occurs. A switch in the comparator output selects trigger polarity. The signal is then shaped in the Schmitt multi and is coupled to the Sweep Generator to start the sweep voltage runup.

The Sweep Generator is a Miller integrator (runup) which provides a linear sawtooth voltage to the horizontal amplifier. A gate-amplifier circuit provides signal to the CRT to blank the trace during the retrace interval.

The Horizontal Amplifier contains adjustable com

ponents to set horizontal XI Gain, X10 Gain, and positional registration in the magnified mode. The output circuitry provides drive to the CRT horizontal deflection plates.

The Power Regulator derives all of the regulated operating voltages from the DC source voltage (internal battery or external DC source). Adjustments are provided to set the CRT beam accelerating potential, focus, beam intensity, and the + and — 5-volt supply levels.

The Battery Charger circuit provides current either for charging the battery in about 16 hours or a trickle charge which just offsets the internal losses of a fully charged battery. An internal adjustment sets the charge current level.

BASIC BLOCK DESCRIPTION

Introduction

This section describes briefly each of the basic circuits. The description of each block is keyed to the circuit schematic (foldout at rear of manual), i. e., (2) indicates schematic No. 2, CH 1 Vertical Preamplifier.

Ch 1 Vertical Preamplifier (2)

Input Coupling. Determines the method of coupling the

signal to the amplifier input (AC—DC—GND).

Attenuators. Conventional frequency compensated step attenuators which maintain the input RC at 1 and 47 pF in each of the 10 switch positions.

Input. CR30 through CR33 prevent overdrive to the

input FET, Q31A. R36 permits adjustment for any

differences in the characteristics of Q31A and Q31B, which

are electrically and thermally paired.

The first amplifier stage is a feedback amplifier con sisting of the paraphase configuration Q41A and Q41B and the common-base section Q51-Q52 and Q53-Q59. R41 (X10 Vert Gain) adjusts the gain in the X10 switch (S40) position. R37 (Var Volts/Div Bal) adjusts Q41Aand Q41B collector loads to prevent display shift as the VOLTS/DIV Variable is rotated throughout its range.

A push-pull emitter follower, Q55-Q57 drives the push- pull amplifier Q61-Q71. X I Gain calibration and Volts/Div Variable are adjusted in the comm on-emitter circuit and display vertical position is adjusted in the collector circuits.

Q81-Q91-Q88-Q99 is a push-pull feedback amplifier in

which the upper and lower deflection plate DC levels are

adjusted.

Q95 and Q98 supply CH 1 signal to the triggering selector circuit.

Calibrator (shown on schematic (1)). The calibrator (an astable multi, Q1 and Q9, and a precision voltage divider) provide a 0.5-volt square wave to the front-panel CAL OUT

jack, and to the Input FET via the 5 DIV CAL position of

each (CH 1 and CH 2) attenuator switch.

CH 2 Vertical Preamplifier (diagram (4)). Same as CH 1

Vertical Preamplifier except for Trigger Pickoff and Calibrator.

Vertical Switching and Output (5). Q333-Q343-Q355, a multivibrator with several operating modes, provides

channel switching by gating the signal through the appro

priate diodes in the switching matrix (CR311 through

CR313 and CR315 through CR318). The operating modes

(selected by the Mode switch) are:

CH 1. +5 volts is applied to Q333 base divider resistor,

R342, and to CR316-CR317, blocking CH 2, gating only

CH 1 through to the Output Amplifier.

CH 2. Applies +5 volts to Q343 base divider resistor, R332, and to CR311-CR312, blocking CH 1, gating only CH 2 through to the Output Amplifier.

CHOP. Applies +5 volts to the junction of R335-R345. The switching circuit operates as an astable (free running) multi at a 110 kHz rate, alternately gating CH 1 and CH 2 into conduction. Since the switching rate is fixed (not dependent on trigger signal) both signals are displayed simultaneously on the viewing screen. A signal is taken

3-2

El

j Vert X10 X I Vert

I Gain Gain

j R41 R65

i

Var Volts/Div CH 2 Preamp identical except for Bal trigger pickoff and calibrator cir- R37 cuits.

Fig. 3-1. CH 1 Vertical Preamplifier (2)

Circuit Description—326 (SN 300500-up)

3-4

Fig. 3-2. Vertical Switching and O utput A mplifier (5)

Circuit Description—326 (SN 300500-up)

from the junction of C335-C345, amplified in Q361, and

fed to the blanking circuit via CR668# (7), to blank the

CRT beam during the switching interval.

ALT. Collector voltage supply is connected to Q351 via

R350. Trigger signal from the Alt Trigger Source, (6), is connected to the steering diodes, CR335 and CR345. The channel switched on depends on the last previous condition of the multi (which side was turned on). Each incoming trigger switches the multi, turning one set of channel switching diodes on and turning the other set off. Channel

1 and Channel 2 are displayed alternately.

ADD ALG. +5 volts is applied to the junction of R370-R380, gating both channels through to the Output Amplifier, displaying the algebraic sum of the two signals.

The amplifier following the gating is a common-base pushpull amplifier (Q376-Q386) driving the 300 ns delay line. Norm trigger is picked off at Q386, amplified in Q392 and fed to the Trigger Source switch, (6).

The feedback amplifier Q410-Q415, Q420-Q425, is

followed by the high frequency compensation network.

Common-base stage Q416-Q426 feeds the Output feedback

amplifie r, Q432-Q457 - Q462-Q464 and Q434-Q458-Q472-Q474.

Amplifier Q448-Q452-Q454 provides deflection plate

current boost for high frequency signals.

Trigger Preamplifier. Trigger source (CH 1 ONLY or NORM) is selected^ by S500, amplified by feedback amplifier Q505-QS95, and fed to the Trigger Generator,

(6). 5'<>

Trigger Generator. S540 (TRIGGERING SOURCE- COUPLING) selects trigger from either the Trigger Pre amplifier, (6), or the EXT TRIG OR HORIZ INPUT

connector (side panel). Signal is passed via a voltage limiting network to FET Q545, through switching (part

of Trigger and part of TIME/DIV switches) and fed to a DC comparator amplifier, Q552-Q556, where the incoming trigger signal is compared to a DC level to set the point on the trigger signal at which triggering occurs. Trigger polarity

is determined by the position of the switch in the collector

circuits of Q552-Q556.

Q570 and Q580, a Schmitt multi shapes the trigger signal (square wave out) which is differentiated at the Sweep Generator, (7), input.

Trigger switch S560 also switches in the appropriate components to cause the trigger generator to act as a free running multi in the AUTO position of the LEVEL/SLOPE control. The free running multi provides a trace in the absence of trigger signal.

Unblanking and Sweep Generator. Differentiated trigger signal, applied to the trigger gating circuit, Q611-Q630- Q636-Q638-CR620-CR640-CR628, provides signal to gate the Miller Integrator, (7).

to Horiz Amp

3-5

Fig. 3-3. Trigger Generator (6)

Circuit Description—326 (SN 300500-up)

Fig. 3-4. Unblanking and Sweep Generator (7)

Output from the Miller runup is amplified in the Sweep Output Amplifier. The output signal is fed back to Q640 through the timing capacitor and timing resistor to set the sweep rate. Output is also fed back via the sweep length control, R618, to the gating circuit to end the sweep. The output also supplies signal to the holdoff circuit, Q611-Q664, to block incoming trigger signals until the sweep has ended and the sweep circuitry ready to start another sweep.

Blanking signal is selected from one of three points; sweep output, EXT BLANK connector, or from the chopped blanking signal from the Vertical Switching circuit, (5).

The blanking circuit, Q672-Q682-Q685-Q692-Q696, provides CRT beam blanking during retrace and during switching interval in Chopped Mode.

Horizontal Amplifier. Signal from either the Sweep Output, (7), or External Horizontal input is selected by the TIME/DIV switch. The input selector circuit contains

adjustments for Sweep Start, Sweep Linearity, and Sweep

Cal, (9).

The feedback amplifier Q726-Q732-Q738-Q740,

contains components in the feedback loop to set the X10 Mag Gain and X10 Mag Registration. R708 adjusts hori zontal display position.

Common-base amplifier, Q741, drives the inverter,

Q744-Q 746, which drives the Output amplifiers, Q756-Q758-Q748 and Q770-Q772-Q778.

Power Regulator Circuit. DC is supplied to the regulator

through the ON-OFF switch and fuse, F870.

3-6

Circuit Description-326 (SN 300500-up)

Fig. 3-5. Horizontal Amplifier (9)

A low battery voltage indicator circuit flashes the front-panel LOW BATT lamp when the applied DC level drops below +9.75 volts.

The start circuit supply provides operating potential to the start multi until the power supply is operating.

Initially, the start multi provides a pulse to the turn-on circuit, which provides turn-on bias to the current driver circuit, gating current into T970 transformer primary. The current in T980 primary produces a secondary voltage which is connected to the turn-off circuit. When the T980 secondary current reaches a predetermined level the turn off circuit reverse biases the current driver, rapidly termi-

OFF

o

F870

3-7

Fig. 3-6. Power Regulator (10) (11)

Circuit Description-326 (SN 300500-up)

nating current in T970 and T980 primaries. A t the same time a pulse is connected to the turn-on disable circuit which removes the turn-on signal to the current driver.

The next pulse from the start multi again starts the

current buildup sequence.

Regulation is achieved by controlling the length of time that current is gated to T970 primary. The turn-on time is determined by the pulse repetition rate of the start multi, which is a function of the start multi collector supply voltage. The start multi collector supply levels are set by

U910 (pin 6). The level at pin 6 is determined from two

sources: a — 16.5-volt DC supply (transformer secondary) to

a variable divider, R907, and a sample of voltage from a section of the high voltage supply (transformer secondary).

Any attempted change of the output voltage (trans former secondary) causes the level at pin 6 (U910) to change, causing a change in start circuit multi switching

rate, thus changing the transformer (T970) primary current

duration, correcting the output voltage.

Once the supply output has come up to normal operating levels, the start circuit supply is reverse biased and T970 secondary supplies assume the regulator load.

In the event that the supply battery voltage drops to too low a level, the low battery shutdown circuit clamps one side of the start multi, turning off the current drive to T970 primary, thus shutting down the supply.

Detailed Regulator Description (10) (11)

CR880 limits Zener current in VR882 over the wide range of acceptable supply voltages. VR882 sets the emitter levels of Q882 and Q884, providing start-up operating potential for the regulator. Once the regulator is func

tioning normally the start circuit supply is removed from the circuit (CR886 and Q884 reverse biased).

Q890, Q892, and associated circuitry, an astable multi provide a negative-going pulse through C892 to the base of Q917, turning Q917 on. Q917 turns on Q928. Q928 turn on produces a positive step at T930 secondary, turning on Q930, providing turn-on bias for the current drivers, Q976 and Q978. At the same time, the positive-going pulse at T930 secondary is fed back through R927 to Q928 base,

reinforcing the turn on.

Current builds up in T970 primary, causing voltage buildup in T970 secondaries. Since T980 primary is in series with T970 primary, a voltage builds up across T980

secondary. This secondary voltage forward biases D940,

increasing the voltage level at Q942 anode. When Q942 anode comes to within 0.6 volts of Q942 gate level, Q942 ( turns on, biasing Q948 into saturation, pulling Q976 and Q978 bases toward ground reverse biasing Q976 and Q978, rapidly terminating current in T970 primary.

At the time that Q942 conducts to saturate Q948, a pulse is fed back to Q918, turning Q918 on, cutting off Q928 and Q930, reinforcing the turnoff.

The rapid field collapse in T970 produces the flyback voltage in T970 secondary.

U910, an integrated circuit voltage regulator, controls the voltage applied to the start multi collectors. Two voltages influence the U910 output voltage (pin 6). Variable R907 (with R 905 and R909 and the —16.5 volt supply) connected to U910 inverting input adjust the supply output secondary level (secondary voltages).

A sample of voltage picked off of one section of the high voltage supply is fed back to U910 non-inverting input.

Both of these U910 input voltages correct the output voltage level by controlling the voltage at pin 6 (U910). The ( voltage level at pin 6 determines the switching repetition rate of the start multi, thus setting the time duration of current buildup in T970 primary, thereby setting the output voltage level in T970 secondary.

Any attempted change in supply output level is seen at U910, correcting the level at pin 6, changing the repetition rate of the start multi, correcting the supply outpujt voltages.

In normal operation (normal DC input supply levels) Q888 is forward biased, holding Q887 cut off, having no ■ effect on the start multi. If the DC input supply level drops > too low, Q888 turns off, permitting Q887 to turn on,

pulling Q887 collector toward ground, thereby disabling

the start multi, shutting down the supply.

Since the secondary supplies and regulation are conven

tional circuitry, no detailed description is given.

Battery Charger (12)

With no instrument load on the battery, and FULL CHG-TRICKLE CHG switch in the FULL CHG position, the battery is charged at 150 mA as follows:

3-8

Circuit Description-326 (SN 300500-up)

a.c. Supply

Fig. 3-7. Battery Charger

Charge current is supplied by the 5-6 terminals of T1101

secondary, the diode bridge, CR1110, through pass transis

tor, Q1117, and the sensing resistor, R1115.

The circuit which determines the charging current is a

feedback amplifier consisting of a DC comparator

(Q1134-Q1136), an error amplifier (Q1121-Q1120), and pass transistor (Q1117).

The base reference voltage of Q1136 is set by VR1149 and the divider, R1143 and variable R1144. Current for VR1149 is supplied by transformer secondary winding

(7-8), rectifier CR1105, filter capacitor. Cl 105, and Zener

current-setting resistor, R1105.

During full charge rate the voltage drop across sensing resistor, R1115 plus the drop across R1130 set the voltage level at Q1134. The base potential of Q1134 determines the current through R1139, setting the operating potential for

Q1121. The current through the divider R1120-R1123 sets Q1120 base level. Q1120 conduction sets the base level for Q1117, the pass transistor, fixing the current to charge the battery at about 150 mA.

Any line voltage change is seen as a change in potential

across the supply (transformer secondary terminals 5 and 6)

and results in a change in potential across R1115 and is

seen by Q1134 base as error signal.

The error signal is amplified in Q1121 and Q1120, which corrects the base drive to Q1117, bringing the feedback amplifier back to a state of balance.

If the instrument is turned on, the added load momen

tarily causes less charging current to flow to the battery. The reduced drop across R1115 is seen as error signal to the comparator Q1134-Q1146, causing a change in potential across R1139, which is amplified in Q1121-Q1120,

increasing the drive to Q1117. The charge current increases to the point at which the feedback amplifier again reaches a balance (charge current back to 150 mA).

CR1137 and CR1138 prevent Q1134 and Q1136 collectors from rising to the point at which Q1134 and Q1136 would saturate during the periods when CR1110 (bridge) is not conducting.

The charge rate may be lowered to provide a trickle charge to the battery (to offset internal losses) by switching from FULL CHG to TRICKLE CHG. Switching R1133 into the circuit causes an additional drop across R1130, decreasing the voltage on Q1134 base. The reduced base voltage causes Q1117 drive (through Q1120-Q1121-R1139) to reduce the charge current to the battery.

3-9

Section 4-326 (SN 300500-up)

MAINTENANCE

Introduction

This section of the manual contains maintenance infor

mation for use in preventive or corrective maintenance and

troubleshooting the 326.

supply voltage is within the listed tolerance, the supply can be assumed to be operating properly. If outside the tolerance, the supply may be misadjusted or operating

incorrectly.

GENERAL

Cleaning

Avoid the use of chemical cleaning agents which might damage the plastics used in this instrument. Avoid chemicals which contain benzene, toluene, xylene, acetone or similar solvents.

Semiconductor Checks

Periodic checks of the semiconductors in the 326 are not

recommended. The best check of semiconductor perfor mance is actual operation in the instrument.

Recalibration

A calibration check is recommended after each 1000

hours of operation or every year if used infrequently.

Replacement of components may necessitate recalibration of the affected circuits. Complete calibration instructions are given in the Performance Check/Adjust section.

Troubleshooting Aids

Diagrams. Circuit diagrams are given on foldout pages in the Diagrams section. The circuit number and electrical value of each component are given on the diagrams. I mportant voltages are also shown.

Circuit Boards. A tin t band outlines each circuit board on the Schematic Diagrams and a photograph of each board is shown to the left of the diagram. Each board-mounted electrical component is identified in the photograph by its circuit number.

Voltages. Often the defective components can be

located by checking for the correct voltage in the circuit.

Some typical voltages are given on the Schematic Diagrams. These voltages are not absolute, and may vary slightly from

instrument to instrument.

Power Supply Voltage. Table 4-1 lists the voltage

tolerances of the power supplies in the 326. If the power

TABLE 4-1

Supply

Voltage

Ripple

-5 V

Within 2%

10 mV

+5 V

Within 2%

10 mV

+14 V

±20%

200 mV

+ 100 V

±5%

750 mV

+ 165 V

+8%, -6%

750 mV

+1900V

Within 2%

Troubleshooting Equipment

The following equipment is useful for troubleshooting

the 326.

1. Semiconductor Tester. While the most convenient

check of the semiconductor device is substitution or

junction resistance measurement, some means of testing

transistors and diodes may be helpful. For complete tests, the TEKTRONIX 576 Semiconductor Curve Tracer is recommended.

/

2. DC Voltmeter and Ohmmeter. For most applications a 20,000 ohms/volt VOM can be used to check voltages and resistance, if allowance is made for the circuit loading when making voltage measurements at high impedance points.

3. Test Oscilloscope. A test oscilloscope is required to check circuit waveforms. An oscilloscope having a DC to 10 MHz frequency response and 1 mV/Div to lOV/Div

vertical deflection factor is suggested. A 10X probe should be used where circuit loading is critical.

REPLACEMENT PARTS

Standard Parts

NOTE

All replacement parts should be direct replacements unless it is known that a different component will not adversely affect the instrument performance.

REV. B, OCT. 1974

4-1

Maintenance—326 (SN 300500-up)

L

B

Q878

*

cu

E

B

*

Plastic Case

Fig. 4-1. Transistor lead configurations.

Refer to the Parts Ordering Information preceding the

Electrical Parts List and Mechanical Parts List sections.

Special Parts

Some parts are manufactured or selected by SONY/

TEKTRONIX to satisfy particular requirements, or are

manufactured for SONY/TEKTRONIX to our specifica

tions. These special parts are indicated in the parts lists by

an asterisk preceding the part number. Most of the

mechanical parts used in this instrument have been manu factured by SONY/TEKTRONIX. Order all special parts directly from your local TEKTRONIX Field Office or

Representative.

ASSEMBLY AND COMPONENT

REPLACEMENT

General

The exploded-view drawings associated with the

Mechanical Parts List pullout page (Fig. 1, EXPLODED)

may be helpful when disassembling or reassembling indi

vidual components or sub-assemblies.

Semiconductor Replacement

Replacement semiconductors should be of the original

type or a direct replacement. Fig. 4-1 shows the lead

4-2

Maintenance—326 (SIM 300500-up)

Fig. 4-2. Vertical Preamp circuit board removal.

configuration of the semiconductors used in this instru ment. Some plastic cased transistors may have lead configurations which do not agree with those shown here.

If a replacement transistor is made by a manufacturer other than the original, check the manufacturer's basing diagram for correct basing. All transistor sockets in this instrument are wired for the standard basing as used for metal-cased transistors.

Circuit Board Removal

Color codes for all wire connections to the boards can be

found adjacent to the corresponding schematic (foldout at

rear).

Fig. 4-4. Vertical Output circuit board removal.

Follow the instructions for the given circuit board in the

following figures, 4-2 through 4-7.

Power Supply-Regulator Removal

Remove the battery pack before removing the Power Supply-Regulator board.

Remove the machine screws indicated by the arrows in

Fig.4-8A.

Fig. 4-3. Horizontal circuit board removal.

Very carefully pull the supply assembly straight up until

the assembly is free of the chassis.

REV. B, OCT. 1974

4-3

Maintenance-326 (SN 300500-up)

Fig. 4-7. Battery Charger circuit board removal.

Fig. 4-5. Trigger Sweep circuit board removal.

Power Supply-Regulator Cover Removal

Remove the three machine screws on top of cover and

two machine screws at the back end of cover as shown in

Fig. 4-8B and remove the cover.

To remove attenuator board remove this screw, unsolder all leads, remove both VOLTS/DIV and VAR IABLE knobs and slide | circuit board away from s

To remove CAL/SW Board, remove this | screw, unsolder all leads and slide circuit board away from panel I

Fig. 4-6. Calibrator/Switching circuit board and attenuator circuit board removal. Fig. 4-8. Removing (A) Power Regulator and (B) Regulator cover.

4-4

REV. B, OCT. 1974

Maintenance—326 (SN 300500-up)

■ M B M .

;' ! 1, Remove the Vertical Output!

: 4 \; | and Horizontal circuit boards as;

' j shown in Fig. 4-3 and 4-4.

2. Remove the four feet from the rear panel and remove the rear; panel overlay.

^ 3. Remove two machine screws

: and remove the CRT base cover | plate.

5. Remove the screws indicated

i by the arrows and move the Verti

cal Output circuit board far enough to permit the CRT shield

to clear.

16. Loosen the hex nut (do not , remove the nut).

7. Slide the CRT shield toward the rear of the instrument until the assembly clears the front sub

panel. Lift the assembly away

from the instrument. Avoid

letting the CRT fall out of the

shield.

Left-side rail j

f

....\s..........[...

1 tt vr tttiA Aft ttstftt*

CHI VERT INPUT _ CH2 VERT IftJPlJT ftE

CP a Mr*

CRT Removal

Remove the CRT as shown in Fig. 4-9.

Cam Switch Replacement

Fi9- 4-9. CRT removal.

2. Remove the defective cam switch.

3. Leave the metal cover on the new cam switch and secure the switch to the circuit board in the same position as the switch just removed.

Each new cam switch is shipped with a metal cover. This cover should be discarded after switch installation. Replace the switch as follows:

1. Remove the double cover from the pair of cam

switches.

4. Check the new switch for proper mechanical opera

tion (freedom of rotation, etc.).

5. Remove the metal cover from the switch just

installed and replace the double cover over both switches.

REV. B, OCT. 1974

4-5

Maintenance—326 (SN 300500-up)

fllJll

j(A) Charger Removal)

2, Pull Charger! away from in- r strument.

(B) Charger Replacement |

1. Switch the BATT OR AC A D P T - EXT DC POWER switch on the 326 to

i BATT OR AC ADPT.

13. Align the banana plugs on the

j Charger with the jacks on the 326 and j

i push the Charger toward the instrument.!

2. Switch the BATT OR AC AD P T-

■i EXT DC POWER switch on the Charger

to BATT OR AC ADPT.

4. Tighten the four corner screws to)

i secure the Charger to the 326.

Fig. 4-10. Battery Charger (A) removal and (B) replacement.

Battery Charger Removal and Replacement

See Fig. 4-10 for Battery Charger removal and replace-

m e^ instructions.

Instrument Repackaging

If the 326 is to be shipped over long distances by

commercial transportation, it is recommended that the

instrument be repackaged in the original manner for maximum protection. Repackaging information and/or new shipping carton may be obtained from Tektronix, Inc.

Contact the nearest TEKTRONIX Field Office or Repre

sentative. See Fig. 2 Repackaging (pullout. Mechanical Parts List, Section 8).

4-6

Section 5—326 (SN 300500-up)

PERFORMANCE CHECK/ADJUSTMENT

Introduction

A performance check is recommended every 1000 hours of operation, or every year if used infrequently. Before complete calibration, the instrument should be cleaned and inspected as outlined in the Maintenance section.

The Performance Check can be used to check instrument performance without making any internal adjustments.

As an aid to checking the performance of the 326, a Short-Form Procedure is given preceding the complete procedure. To facilitate instrument checkout, the Short- Form Procedure lists the check and applicable tolerances.

This procedure also includes the step, number, and title as

listed in the complete Performance Check, and the page number on which each step begins. The Short-Form Procedure also provides spaces to record performance data or to check o ff steps as they are completed.

Following the Performance Check is a complete ADJUSTMENT procedure. Completion of the Adjustment Procedure insures that the instrument meets the electrical specifications given in Section 1.

NOTE

Limits, tolerances, and waveforms in the ADJUST MENT procedure are given as calibration guides and should not be interpreted as instrument specifications except as specified in Section 1.

TEST EQUIPMENT REQUIRED

General

The following test equipment and accessories, or equiva

lent, are required for complete check or adjustment of the

326. Specifications given are the minimum necessary for accurate check or adjustment. Some of the recommended equipment may have specifications that exceed those given. All test equipment is assumed to be correctly calibrated and operating within the given specifications. If equipment is substituted, it must meet or exceed the specifications of the recommended equipment.

Special TEKTRONIX calibration fixtures are used to

facilitate calibration and performance checks. These special

fixtures are available from Tektronix, Inc. Order by part

number through your local TEKTRONIX Field Office or representative.

Test Equipment

1. Precision DC voltmeter. Accuracy, within ±0.1%; range, zero to 200 volts. For example, Fluke Model 825A Differential DC Voltmeter.

2. DC voltmeter (VOM). Minimum sensitivity, 20,000

ohms/volt; accuracy, checked to within 1% a t—1900 volts.

For example, Triplett Model 630-NA.

3. Variable DC power supply. Voltage range, at least+7 to +32 volts; current capability, at least 1.5 ampere; output voltage, measured within 3%.

4. Test oscilloscope. Bandwidth, DC to 10 MHz; mini mum deflection factor, 2 mV/Div; accuracy, within 3%. SO N Y/TEK TR ON IX Type 324 Oscilloscdfte is recommended.

5. Time-mark Generator. Marker output, 0.1 jus to 0.1 s; marker accuracy, within 0.1%. TEKTRONIX 2901 Time- Mark Generator is recommended.

6. Standard Amplitude Calibrator. Amplitude accuracy, within 0.25%; signal amplitude, 5 mV to 100 volts; output signal, square wave. TEKTRONIX Calibration Fixture 067-0502-01 is recommended.

7. Square-Wave Generator. Must have the following output capabilities (may be obtained from separate genera tors): 120 volts amplitude at 1 kHz repetition rate with a one microsecond risetime; 500 mV into 50 ohms at 1.0 kHz and 1.0 MHz repetition rates with a 50 ns risetime. TEKTRONIX Type 106 Square-Wave Generator is recom mended (meets both output requirements).

8. High-Frequency Constant-Amplitude Sine-Wave Gen erator. Frequency, 350 kHz to above 10 MHz; reference frequency, 50 kHz; output amplitude, variable from 5 mV to 0.5 volt into 50 ohms; amplitude accuracy, constant

5-1

Performance Check/Adjustment—326 (SN 300500-up)

within 3% at 50 kHz and from 350 kHz to above 10 MHz. TEKTRONIX Type 191 Constant Amplitude Signal Gen erator is recommended.

9. Low-Frequency Constant-Amplitude Sine-Wave! 6n- erator. Frequency, 2 Hz to 100 kHz; output amplitude, variable from 50 mV to 16 volts, peak to peak; amplitude accuracy, constant within 3% from 2.0 Hz to 100 kHz. For example. General Radio 1310-A Oscillator (use a General

Radio Type 274QBJ adapter to provide BNC output).

10. Variable Autotransformer1. Must be capable of supplying a range of 90 to 136 volts (180 to 272 volts for 230-volts nominal line). If autotransformer does not have an AC voltmeter, monitor the output with an AC voltmeter having a range of 136 or 272 volts, RMS. For example. General Radio W10MT3A Metered Variac Autotransformer for 115 volts or General Radio W20MT3A for 230-volt nominal operation.

11. IX Probe with BNC connector. TEKTRONIX .

P6011 is recommended.

12. Cable. Impedance, 50 ohms; type, RG-58/U; length, 42 inches; connectors, BNC. TEKTRONIX Part Number 012-0057-01.

13. Calibration Shield. SONY/TEKTRONIX Calibration

Fixture. TEKTRONIX Part Number 067-0669-01.

14. Adapter. Adapts GR874 to BNC male connector. TEKTRONIX Part Number 017-0063-00.

15. Termination. Impedance, 50 £2; accuracy, ±2%; con nectors, BNC. TEKTRONIX Part Number 011-0049-01.

16. 10X Attenuator. Impedance, 50 12; accuracy, ±2%; connectors, BNC. TEKTRONIX Part Number 011-0059-01.

17. Input RC Normalizer. Time constant, 1 M12 and 47 pF; attenuation, 2X; connectors, BNC. TEKTRONIX Calibration Fixture 067-0541-00.

18. 10X probe for the 326 and the 324 Test Oscillo

scope. TEKTRONIX P6049A Probe is recommended (two

supplied as accessories).

19. Current Probe for the 324 Test Oscilloscope. TEKTRONIX P6021 is recommended. TEKTRONIX Part Number is 015-0140-02.

1 Not required for performance check only.

20. Adapter, BNC to Binding Post. TEKTRONIX Part

Number 103-0033-00.

21. BNC T Connector. TEKTRONIX Part Number

103-0030-00.

22. Patch Cord. Length, 18 inches; connectors, banana plug-jack and BNC male. TEKTRONIX Part Number 012-0090-00.

23. Patch Cord. Length, 18 inches; connectors, banana plug-jack to banana plug-jack. TEKTRONIX Part Number 012-0039-00.

24. Cable. Impedance, 5012 type RG-58/U; length, 18 inches; connectors, BNC. TEKTRONIX Part Number 012-0076-00.

25. Dual Input Coupler. Matched signal transfer to each input. TEKTRONIX Calibration Fixture 067-0525-00.

Adjustment Tool

26. Low-capacitance screwdriver. 1 1/2-inch shaft.

TEKTRONIX Part Number 003-0000-00.

SHORT-FORM PERFORMANCE CHECK

AND INDEX

326 Serial Number

______________________________

Date__________________________________________

By--------------------------------------------------------------------------

1. Check Astigmatism Page 5-4

Sharp, well-defined trace.

2. Check Trace Alignment Page 5-4

Marker baseline should be parallel to the horizontal graticule lines.

3. Check Geometry Page 5-4

Deviation from a straight line, not more than 0.1

division.

5-2

REV. B, OCT. 1974

Performance Check/Adjustment—326 (SN 300500-up)

4. Check Compression Page 5-5

Compression not to exceed 0.15 division.

5. Check CH 1 X I Vertical Gain Page 5-5

Vertical deflection, 5 divisions, ±0.15 division.

6. Check CH 1 X10 Vertical Gain Page 5-5

Vertical deflection, 5 divisions, ±0.15 division.

7. Check CH 1 Vertical Deflection Accuracy Page 5-5

Indicated deflection, ±3%.

8. Check CH 1 Variable Volts/Div Range Page 5-5

Range at least 2.5:1.

9. Check High Frequency Compensation Page 5-6

Check for best square corner (leading edge). Aberra tions not to exceed +2.5% or —2.5% with peak-to-peak not to exceed 4%.

10. Check CH 1 Input Capacitance Page 5-6

0.2 div, or less, overshoot or rounding (47 pF,±4 pF).

11. Check CH 1 Volts/Div Switch Com- Page 5-6

pensation

Optimum square corner and flat top at each Volts/Div switch setting.

12. Check CH 1 Vertical Upper —3dB Point Pa9e 5-6

(XI Gain)

At least 10 MHz.

13. Check CH 1 Vertical Upper —3dB Point Page 5-7 (XIOGain)

At least 5 MHz.

14. Check CH 1 Vertical AC-Coupled Page 5-7 Lower—3 dB Point

10 Hz or less.

Repeat steps 4 through 14 for CH 2.

El

15. Check Common-Mode Rejection Page 5-7

Rejection Ratio, 20:1.

16. Check Magnified Registration Page 5-8

Middle marker within 1.0 division of the center vertical graticule line.

17. Check Normal Timing Page 5-8

Check Timing as shown in Table 5-2.

18. Check Variable Time/Div Range Page 5-9

Range, at least 2.5:1.

19. Check Magnified Timing Page 5-9

Check timing as shown in Table 5-3.

20. Check External Horizontal Page 5-9

Horizontal deflection, 4 div to 6.7 div.

Variable range, 10:1 or greater.

21. Check External Horizontal Bandwidth Page 5-10 (Upper —3dB Point)

At least 200 kHz.

22. Check External Blanking Page 5-10

Check for blanking of a portion of each cycle.

23. Check High Frequency Triggering Page 5-10

Stable Triggering on:

0.3 div display at 1.0 MHz, INT LF REJ,

1.0 div display at 10.0 MHz, INT LF REJ,

1.5 div display at 1.0 MHz, EXT AC and DC.

24. Check Low-Frequency Triggering Page 5-11

Stable Triggering on:

1.5 div display at 30 Hz in EXT AC and DC,

0.3 div display at 30 Hz in INT AC.

5-3

Performance Check/Adjustment—326 (SN 300500-up)

25. Check Low-Frequency Reject Page 5-11

Stable display cannot be obtained at 30 Hz.

26. Check Calibrator Page 5-11

Duty Cycle, 40% to 60%.

Output amplitude, 5 divisions.

PERFORMANCE CHECK PROCEDURE

General

The following procedure uses the equipment listed under Test Equipment Required. If other equipment is substi tuted, control settings or checking setup may need to be altered to meet the requirements of the equipment used. Operating instructions for the test equipment are not given in this procedure. Refer to the test equipment instruction manual if more information is required.

The control settings throughout the procedure continue

from the preceding step unless otherwise noted.

NOTE

Control titles that are printed on the front panel of

the 326 are capitalized in this procedure (e.g., CH 1

VOLTS/DIV). Associated equipment controls are

initial capitalized only (e.g., Output Amplitude).

PERFORMANCE CHECK

Initial Control Settings for Performance Check

CH 1 and CH 2

VOLTS/DIV .5 V I nput Coupling AC-DC DC Mode CH 1

TRIGGERING

CH 1-NORM CH 1

Coupling INT AC

TIME/DIV 1 ms

Horiz POSITION Midrange

1. Check Astigmatism

a. Connect the Time-Mark Generator output to the CH

1 VERT INPUT with a BNC cable. Set the Time-Mark

Generator for 1 ms markers.

b. Set the INTENSITY control midway between a

barely visible trace and fully clockwise.

c. Set the trigger controls for a stable display.

d. CHECK—Markers should be well defined within the

areas indicated in Fig. 5-1 with optimum setting of the

FOCUS control.

2. Check Trace Alignment

a. Vertically position the marker baseline to the center

horizontal graticule line.

b. CHECK—Marker baseline should be parallel to the

center horizontal graticule line.

31 Check Geometry

a. Set VOLTS/DIV switch to .1.

\

b. Vertically position the marker baseline below the

bottom graticule line.

c. CHECK—CRT display for minimum curvature of the

vertical markers. Maximum deviation from a straight line,

0.1 division.

d. Disconnect the Time-Mark Generator.

e. Set LEVEL/SLOPE to+AUTO.

f. Vertically position the trace to the top graticule line.

-

■

nJLi LiL i ml uYr

"'flH r'pm 'I

IN Y t

tL

Adjust for best defined markers within

these areas.

Fig. 5-1. Astigmatism check, typical display.

5-4

g. CHECK—Deviation from a straight line should not

exceed 0.1 division.

h. Vertically position the trace to the bottom graticule

line.

i. CHECK—Deviation from a straight line should not

exceed 0.1 division.

4. Check Compression

a. Set CH 1 VOLTS/DIV to 5 DIV CAL.

b. Vertically position the bottom of the display to the

first graticule line below the horizontal center line.

c. Reduce the display to exactly two divisions with the

Variable VOLTS/DIV control.

d. Vertically position the top of the display to the top

graticule line.

e. CHECK—Compression (reduction in amplitude) not

to exceed 0.15 division.

f. Vertically position the bottom of the display to the

bottom graticule line.

g. CHECK—Compression, not to exceed 0.15 division.

5. Check CH 1 X I Vertical Gain

Reset the following controls:

VOLTS/DIV 0.1 Variable VOLTS/DIV CAL

a. Connect the Standard Amplitude Calibrator output connector to CH 1 VERT INPUT connector via a 50-ohm BNC cable.

b. Set the Standard Amplitude Calibrator for a 50 mV square-wave output.

c. Vertically center the display.

d. CHECK—Vertical deflection equal to 5 divisions, ±0.15 division.

Performance Check/Adjustment—326 (SN 300500-up)

6. Check CH 1 X I0 Vertical Gain

a. Set the Standard Amplitude Calibrator for a 5 mV

square-wave output.

b. Pull the POSITION X10 VERT GAIN control.

c. Vertically center the display.

d. CHECK—Vertical deflection equal to 5 divisions,

±0.15 division.

7. Check CH 1 Vertical Deflection Accuracy

a. Push the POSITION X10 VERT GAIN control knob.

b. CHECK—Using the VOLTS/DIV switch and Standard Amplitude Calibrator settings given in Table 5-1, check deflection accuracy at each position of the VOLTS/DIV switch.

TABLE 5-1

VOLTS/DIV

Switch

Settings

Calibrator

Amplitude

Vertical

Deflection in divisions

Max Error

in divisions

.01 50 mV

5

±0.15

.02

0.1 V

5

±0.15

.05 0.2 V

4

±0.12

.1

0.5 V 5

±0.15

.2

1 V

5

±0.15

.5

2 V

4

±0.12

1 5 V

5

±0.15

2 10 V

5

±0.15

5

20 V

4

±0.12

10 50 V

5

±0.15

8. Check CH 1 Variable Volts/Div Range

a. Set the Standard Amplitude Calibrator for a 50 mV square-wave output.

b. Reset CH 1 VOLTS/DIV to .01.

5-5

c. Vertically center the display.

Performance Check/Adjustment—326 (SN 300500-up)

d. CHECK-Rotate the CH 1 Variable VOLTS/DIV control fully counterclockwise. Display must reduce to two divisions or less.

e. Return the VOLTS/DIV Variable to the CAL posi tion.

9. Check High Frequency Compensation

Reset the controls as follows:

X10 VERT GAIN Pushed in

XIOHO RIZ MAG Pulled

TIME/DIV 1 /is

a. Connect the Square-Wave Generator Fast-Rise + Output connector to CH 1 VERT INPUT connector through a GR to BNC adapter, 50-ohm BNC cable, 10X, 50-ohm attenuator, and a 50-ohm BNC termination in the order given.

b. Set the Square-Wave Generator for a four division

display at 100 kHz.

c. Horizontally position the leading edge of the square

wave into the viewing area. Reset triggering as necessary for correct display. See Fig. 5-2.

10. Check CH 1 Input Capacitance

Reset the controls as follows:

TIME/DIV .5 ms

CH 1 X10 VERT GAIN Pushed

a. Connect the Square-Wave Generator High Amplitude Output connector to the CH 1 VERT INPUT connector through the GR to BNC adapter, 50-ohm BNC cable, 50-ohm termination, and 47 pF RC Normalizer in the order given.

b. Set the Square-Wave Generator for a five-division display at one kHz.

c. CHECK—CRT display for 0.2 division, or less, of overshoot or rounding (47 pF, ±4 pF; see Fig. 5-3).

11. Check CH 1 Volts/Div Switch Compensation

a. Connect a P6049A Probe to the CH 1 VERT INPUT connector.

b. From the Square-Wave Generator High Amplitude Output connect a GR to BNC adapter, 10X 50-ohm BNC attenuator and BNC binding post adapter.

c. Connect the P6049A Probe tip to the BNC-binding

post adapter.

d. CHECK—The display for best square corner (aberra- cL $et the Square-Wave Generator for a five-division tions not to exceed +2.5% or —2.5% with peak-to-peak display at 1 kHz. aberrations not to exceed 4%.

e. Compensate the probe as described in the probe

manual.

:

■

: -

'1 'I 1 1

Fig. 5-2. High frequency response check, typical display.

f. CHECK—CRT display for optimum square corner and flat top at each VOLTS/DIV switch setting. Adjust the generator output for each switch position to maintain a

five-division display.

12. Check CH 1 Vertical - 3 dB Point (X I Gain)

Reset the controls as follows:

CH 1 VOLTS/DIV

X10VERT GAIN

TIME/DIV

.01

Pushed in

1 ms

5-6

EE

Performance Check/Adjustment—326 (SN 300500-up)

Fig. 5-3. Input capacitance check, typical displays.

a. Connect a High-Frequency Constant-Amplitude Sine- Wave Generator to the CH 1 VERT INPUT connector through the GR to BNC adapter, 50-ohm BNC cable, 10X 50-ohm BNC attenuator and a 50-ohm BNC termination.

b. Set the Constant-Amplitude Sine-Wave Generator for a four-division display, centered on the graticule, at the generator reference frequency (50 kHz).

c. Without changing the generator output amplitude,

increase the frequency until the display amplitude is

reduced to 2.8 divisions (—3 dB point).

d. CHECK—Generator output frequency must be at least 10 MHz.

13, Check CH 1 X10 Vertical Gain Upper —3dB

Point

a. Pull the X10 VERT GAIN switch.

b. Set the Constant-Amplitude Sine-Wave Generator for

a four-division display, centered on the graticule, at the generator reference frequency (5,0 kHz).

c. Without changing the generator amplitude, increase

the frequency until the display amplitude is reduced to 2.8

divisions (—3dB point).

d. CHECK—Generator output frequency must be 5 MHz

or greater.

14. Check CH 1 Vertical AC-Coupled Lower

—3 dB Point

Reset the controls as follows:

CH 1 AC-DC AC

X10 VERT GAIN Pushed in

TIME/DIV 2 ms

a. Connect the Low-Frequency Constant-Amplitude Sine-Wave Generator to the CH 1 VERT INPUT connector through the 50-ohm BNC cable and a 50-ohm termination.

b. Set the generator for a four-division display, centered

on the graticule, at a 1.0 kHz reference frequency.

c. Without changing the generator amplitude, decrease the frequency until the display amplitude decreases to 2.8 divisions.

d. CHECK—Generator frequency must be 10 Hz or less.

e. Remove the low-frequency generator, set the Mode switch to CH 2, and check CH 2, starting with step 4. After completing steps 4 through 14, for CH 2, continue with step 15,

15. Check Common-Mode Rejection

Change the following control settings:

TRIGGERING

CH 1-NORM CH 1 LEVEL/SLOPE +AUTO Coupling INT AC

5-7

Performance Check/Adjustment—326 (SN 300500-up)

TIME/DIV 1 ms

Mode CH 1 CH 1 VOLTS/DIV 0.01

a. Connect the Low-Frequency Constant-Amplitude Sine-Wave Generator output through a 50-ohm BNC cable, 50-ohm BNC termination, and a 50-ohm dual-input coupler to CH 1 and CH 2 VERT INPUT connectors.

b. Adjust the generator output amplitude for an eight-

division display (80 mV) at 2 MHz.

c. Set Mode switch to ADD.

d. Set the CH 2 INVERT button to the OUT position.

e. CHECK—Display for not more than 0.4 division of display (20:1 rejection ratio).

16. Check Magnified Registration

Reset controls as follows:

CH 1 VOLTS/DIV .1

InputAC-DC DC

TIME/DIV 1 ms

a. Connect the Time-Mark Generator to the CH 1 VERT

INPUT through the 50-ohm BNC cable and 50-ohm

termination.

b. Set the Time-Mark Generator for 5 ms markers.

c. Set the trigger controls for a stable display in the variable positive-slope area.

d. Position the middle marker (of the three markers displayed) to the center vertical line.

e. Pull the X10 HORIZ MAG switch. Do not change knob rotational position.

f. CHECK—Middle marker should remain within one division of the center vertical graticule line.

17. Check Normal Timing

a. Push the X10 HORIZ MAG knob.

b. Set the Time-Mark Generator for 1-ms markers and

the 326 TIME/DIV to 1 ms.

c. Set the trigger control for a stable display in the

variable positive slope area.

d. CHECK—CRT display for one marker per division. With the second marker positioned exactly to the second vertical line, the tenth marker must be within 3% (0.24 div)

of the tenth vertical line (see Fig. 5-4).

Second

^ ^ ver*'cal line

HU HU HU .... 1111;

i

*

4+-H-

verl

1

Tenth

Heal

i line _

&

Tenth

^marker

&

■i

:

Fig. 5-4. Timing check.

NOTE

Unless otherwise noted, use the middle eight hori

zontal divisions (between the second and tenth

vertical graticule lines) when checking timing.

e. CHECK—Timing through the remaining positions of the TIME/DIV switch as shown in Table 5-2.

TABLE 5-2

TIME/DIV

Setting

Time

Marks

Accuracy Accuracy

Center 8 Any 2

Div Div

1 s

4% 5%

.5 s

.2 s

.1 s

50 ms

20 ms

10 ms

5-8

Performance Check/Adjustment—326 (SN 300500-up)

TABLE 5-2 (cont)

TIME/DIV

Setting

Time Marks

Accuracy

Center 8

Div

Accuracy

Any 2

Div

5 ms 5 ms

3%

4%

2 ms

1 ms

1 ms .5 ms .5 ms .2 ms .1 ms .1 ms

.1 ms

50 /is

20 /us

10 /is

10/us

5 /is

2 /us

1 Ms

1 /IS

18. Check Variable Time/Div Range

a. Set Time-Mark Generator to 10 ms marker and the

326 TIME/DIV to 1 ms.

b. Set trigger controls for a stable display in the variable

positive-slope area.

c. Align the markers with the first and last graticule

lines.

d. Turn the Variable TIME/DIV control fully counter

clockwise.

e. CHECK—Display for four-division maximum spacing .

between markers.

19. Check Magnified Timing

Reset the controls as follows:

Horizontal POSITION Midrange X10 HORIZ MAG Pulled Time-Mark Generator .1 ms

a. Set TRIGGERING controls in the variable-slope area

for a stable display.

b. CHECK—CRT display for one marker per division

between the second and tenth vertical lines. With a marker

positioned exactly to the second vertical line, a marker must coincide, within 4%, with the tenth vertical line.

c. CHECK—Each TIME/DIV switch position as shown

in Table 5-3.

TABLE 5-3

TIME/DIV

Setting

Time-Mark

Gen

Output

Display

Markers/Div

Max Error

for Given Accuracy

1 /IS .1 /us

1 5%

(0.4 div)

2 /is .1 /IS

2

5 /is .1 /is 5

4%

(0.32 div)

10/us

1 /IS

1

20 /is

1 /IS 2

50 /is

1 /IS 5

.1 ms

10/is 1 .2 ms 10/is 2 .5 ms

10 /us 5

1 ms .1 ms 1

2 ms .1 ms

2

5 ms .1 ms

5

10 ms 1 ms 1

20 ms

1 ms 2

50 ms

1 ms 5

.1 s

10 ms

1

.2 s

10 ms 2 .5 s

10 ms

5

5%

(0.4 div)1 s 100 ms

1

20. Check External Horizontal

a. Set TRIG OR HORIZ ATTEN switch (side panel) to

10X.

b. Set TIME/DIV to EXT HORIZ and TRIGGERING to

EXT AC.

c. Connect the Standard-Amplitude Calibrator to the EXT TRIG OR HORIZ INPUT connector with a 50-ohm BNC cable.

5-9

Performance Check/Adjustment—326 (SN 300500-up)

d. Set the Standard-Amplitude Calibrator for a 10-volt

square-wave output.

e. CHECK—CRT display for a horizontal deflection of

4.0 div to 6.7 div between dots (1.5 volts/div to 2.5 volts/div).

f. Set the calibrator to 1 volt and switch the EXT TRIG

OR HORIZ ATTEN to XI.

g. CHECK—CRT display for a horizontal deflection of 4

div to 6.7 div between dots (150 mV to 250 mV/div).

h. Rotate the EXT HORIZ VARiable control fully

counterclockwise.

i. CHECK—CRT display for at least one tenth the deflection measured in the preceding step (indicates 10:1, or greater, range).

21. Check External Horizontal Bandwidth (Upper —3 dB Point)

a. Set the EXT HORIZ Variable control to CAL

(clockwise).

b. Connect the low-frequency Constant-Amplitude Sine- Wave Generator to the EXT TRIG OR HORIZ INPUT connector through a 50-ohm BNC cable and a 50-ohm BNC termination.

a. Connect the low-frequency Sine-Wave Generator to the CH 1 VERT INPUT connector, through a BNC cable and BNC T connector.

b. Set the generator for a five-division vertical display

(5-volt positive peaks) at 100 kHz.

c. Connect the output of the BNC T connector to the

EXT BLANK connector with a BNC to banana patch cord.

d. CHECK—CRT display for blanking of a portion of

each cycle (see Fig. 5-5). The INTENSITY control may require resetting to show the blanking.

23. Check High Frequency Triggering

Reset the controls as follows:

VOLTS/DIV CH 1 .1 TRIGGERING CH 1,+AUTO

TIME/DIV 1 ms

a. Connect the high-frequency Constant-Amplitude Sine-Wave Generator to the CH 1 VERT INPUT connector through the GR to BNC adapter, 50-ohm BNC cable, 50-ohm BNC termination, and BNC T connector. Connect the output of the BNC T connector to the EXT TRIG OR HORIZ INPUT connector with a 50-ohm BNC cable.

b. Set the generator for a 0.3 division display at

1.0 MHz.

c. Set the generator output for five divisions of hori

zontal deflection at 1 kHz.

d. Without changing the output amplitude, increase the

output frequency of the generator to 200 kHz.

e. CHECK—CRT display for at least 3.5 divisions of

horizontal display.

f. Disconnect all test equipment.

22. Check External Blanking

Set the controls as follows:

.2

I NT AC

5 jus

CH 1 VOLTS/DIV TRIGGERING TIME/DIV

Fig. 5-5. External blanking check, typical display.

Performance Check/Adjustment—326 (SN 300500-up)

c. CHECK—Stable display is presented with the TRIG GERING controls set to INT AC and LF REJ, in the variable positive-slope area, in the variable-slope negative area, and in both +AUTO and —AUTO,

d. Set the generator for a one-division display at

10 MHz.

e. Pull the X10 HORIZ MAG knob.

f. CHECK—Stable display is presented with the TRIG GERING controls set to INT AC and LF REJ in the variable positive-slope area, in the variable negative-slope area, and in both +AUTO and —AUTO.

g. Reset the controls as follows:

TRIGGERING EXT, AC

X10 HORIZ MAG Pushed in

h. Set the generator for a 1.5-division display at

1.0 MHz.

i. CHECK—Stable display is presented in AC and DC in

variable positive-slope area, variable negative-slope area, and

in both +AUTO and —AUTO.

j. Reset the generator for a five-division display at 10 MHz.

k. Pull the X10 HORIZ MAG knob.

I. CHECK—Stable display is presented in AC and DC in

the variable positive-slope area, variable negative-slope area,

and in both +AUTO and —AUTO.

m. Move the signal to CH 2, switch CH 1—NORM to

NORM, Mode to CH 2, and repeat steps a through I.

a. Connect the low-frequency Constant-Amplitude Sine- Wave Generator to the CH 1 VERT INPUT connector through the 50-ohm BNC cable, 50-ohm termination, and

the 50-ohm BNC T connector. Connect the output of the

BNC T connector to the EXT TRIG OR HORIZ INPUT connector with a 50-ohm BNC cable.

b. Set the low-frequency generator for a 1.5-division

display (150 mV) at 30 Hz.

c. CHECK—Stable display is presented in EXT AC and DC, in the variable positive-slope, variable negative-slope area, and +AUTO and —AUTO.

d. Set the generator for a 0.3 division display at 30 Hz.

e. Set the TRIGGERING to INT AC.

f. CHECK—Stable display is presented in the variable negative-slope area, the variable positive-slope area, the

+AUTO, and —AUTO positions.

25. Check Low-Frequency Reject

a. Change the low-frequency Sine-Wave Generator for a

0.3 division display at 15 kHz.

b. CHECK—Stable triggering can be obtained in + and

—AUTO, and in variable positive- and negative-slope areas.

c. Without changing the generator output amplitude, set

the frequency to 30 Hz.

d. Reset TIME/DIV to 10 ms.

e. CHECK—Stable display cannot be obtained at any

setting of the TRIGGERING LEVEL/SLOPE controls.

n. Disconnect the high-frequency generator.

24, Check Low-Frequency Triggering

Set the 326 controls as follows:

TIME/DIV X10 HORIZ MAG TRIGGERING

20 ms Pushed in +AUTO, CH 1

26. Check Calibrator

Change the following control settings:

CH 1 VOLTS/DIV

Input AC-DC

TRIGGERING

LEVEL/SLOPE Coupling

TIME/DIV

5 DIV CAL GND (both buttons out)

-AUTO INT AC .1 ms

5-11

Performance Check/Adjustment—326 (SN 300500-up)

a. Set the Variable TIME/DIV control for one complete

cycle in ten divisions.

b. CHECK—The display for length of the positive segment of the square wave between four and six divisions (duty cycle 40% to 60%).

c. Change the following control settings:

VOLTS/DIV Input AC-DC TIME/DIV Variable VOLTS/DIV

d. Connect a IX probe to the CH 1 INPUT connector.

e. Connect the probe tip to the CAL OUT jack.

f. CHECK—Display for five divisions of vertical ampli

tude.

SHORT-FORM ADJUSTMENT PROCEDURE

AND INDEX

326 Serial Number

__________________________________

Calibration Date -

______________________________

Calibrated B y

_______________________________________

1. Adjust T970 Primary Current Page 5-14

ADJUST R942 for 3.6 A in T970 primary.

2. Adjust High Voltage Supply and Check Page 5-14

Regulation

ADJUST R907 for —1900 volts, within

2%.

3. Adjust Intensity Limit Page 5-15

ADJUST R1046 for 315 juA CRT cathode current.

4. Adjust+5-Volt Power Supply Page 5-15

ADJUST R1004 for 0.500 volt between CAL OUT jack and chassis ground.

5. Adjust -5-Volt Power Supply Page 5-15

ADJUST R1030 for -5 .0 volts, ±75 mV at -5-volt test point.

6. Check Low-Voltage Power Supply Page 5-16

Ripple and Regulation

1

CHECK the low-voltage supplies while varying the external DC supply voltage between +9.0 and +32 volts.

7. Adjust Variable Volts/Div Balance (each Page 5-16

channel)

ADJUST R37 and R237 for no trace shift as Variable VOLTS/DIV is rotated.

Adjust CH 1 Vertical X10 Balance Page 5-17

ADJUST R36 for minimum trace shift as the X10 VERT GAIN switch is pulled out and pushed in.

9. Adjust CH 2 Vertical X 10 Balance Page 5-17

ADJUST R236 for minimum trace shift as the X10 VERT GAIN switch is pulled out and pushed in.

10. Adjust Deflection plate DC Level (each Page 5-17

channel)

CHECK that trace is within ±0.3 Div. of graticule center with Q376 and Q386 collectors shorted together.

SET Vertical POSITION control for zero meter reading ( between points A and B.

ADJUST R82 for a meter reading of 50 volts (Q457 collector and ground).

ADJUST R84 for a meter reading of 50 volts (Q458 collector and ground).

ADJUST R69 to center a clipped signal on the graticule. Set Vertical POSITION control for a zero meter reading

between points O and P.

ADJUST R282 for a meter reading of 50 volts (Q457 collector to ground).

ADJUST R284 for a meter reading of 50 volts (Q458

collector and ground).

ADJUST R269 to center a clipped signal on the graticule.

11. Adjust Astigmatism Page 5-18 ADJUST R1068 (with FOCUS) for the best marker

definition.

12. Adjust Trace Alignment Page 5-18

f

\

ADJUST R1060 to align marker baseline with graticule horizontal centerline.

.1

DC .5 ms CAL 8.

IB

5 -1 2

13. Adjust CRT Geometry Page 5-19

ADJUST R1062 for minimum curvature of markers

and baseline.

14. Adjust Limit Centering (each channel) Page 5-19

ADJUST R69 for minimum compression.

ADJUST R269 for minimum compression.

15. Adjust CH 1 XI Vertical Gain Page 5-20

ADJUST R65 for 5.00 divisions of display.

16. Adjust CH 1 X10 Vertical Gain Page 5-20

ADJUST R41 for 5.00 divisions of display.

17. Adjust CH 2 Vertical XI Gain Page 5-20

ADJUST R265 for 5.00 divisions of display.

18. Adjust CH 2 Vertical X10 Gain Page 5-20

ADJUST R241 for 5.00 divisions of display.

19. Adjust High Frequency Compensation Page 5-20

ADJUST R411 for the best front corner on the square

wave top.

ADJUST R421 for the best front corner on the square

wave bottom.

ADJUST R418, R428, C417, C427, C418, and C428

for best front corner.

20. Adjust Input Capacitance Page 5-21

ADJUST C21 for minimum overshoot or rounding.

ADJUST C221 for minimum overshoot or rounding.

21. Adjust Volts/Div Switch Compensation Page 5-22

ADJUST each attenuator as shown in Table 5-5.

22. Adjust Magnified Registration Page 5-23

ADJUST R713 for position coincidence in XI and

X10.

Performance Check/Adjustment-326 (SN 300500-up)

23. Adjust Normal Timing Page 5-23

ADJUST R611 midway between triggered display and auto sweep.

ADJUST R702 for one marker per division.

24. Adjust Sweep Length and Centering Page 5-24

ADJUST R618 for 10.7 division sweep length.

ADJUST R704 to set trace start.

25. Adjust Magnified Timing Page 5-24

ADJUST R717 for one marker per division.

26. Adjust High Speed Timing Page 5-24

ADJUST C620F for 1 marker per division.

ADJUST C701 for best sweep start linearity.

ADJUST C782 for best sweep and linearity.

27. Adjust External Horizontal 10X Com- Page 5-25 pensation

ADJUST C538 for minimum rounding or overshoot.

28. Adjust Battery Charger Charge Rate Page 5-25

ADJUST R1144 for 45 mV across R1115.

ADJUSTMENT PROCEDURE

Initial Control Settings:

INTENSITY

midrange

FOCUS

midrange

POWER

OFF

CH 1 and CH 2

VOLTS/DIV

5 DIV CAL

POSITION

midrange X10VERT GAIN pushed in Input Coupling AC-DC AC

Mode

CH 1

CH 2 INVERT pushed in TIME/DIV

.5 ms

TRIGGERING

CH 1-NORM

CH 1

LEV/SLOPE

+AUTO

IN T-EXT

INT AC

Horizontal POSITION

midrange

0

5-13

Performance Check/Adjustment—326 (SN 300500-up)

Preliminary Procedure for Complete Calibration

1. Remove the Battery Charger from the 326.

2. Remove the cabinet from the 326.

3. Remove the Battery Pack.

1. Adjust T970 Primary Current (R942)

a. Connect the current probe around the red-on-white

lead from terminal 'M ' on the Power Regulator Control

Board (see Fig. 5-6A for location).

b. Set the current probe Passive Termination for

2 mA/mV and the Test Oscilloscope vertical deflection to

.5 V/Div.

4. Remove the Power Regulator and Regulator cover c observe a waveform on the test oscilloscope similar following the removal instructions in the Maintenance to that shown in Fig. 5-6B. Section (4).

5. Connect an external DC supply to the 326 EXT DC POWER input jacks (note polarity).

d. ADJUST—R942 for 3.6 divisions (3.6 amp) of verti

cal display.

e. Remove the current probe.

6. Set the external DC supply output to +9 volts.

2. Adjust High Voltage Supply and Check Regu-

7. Switch the 326 POWER switch to ON. lation

a. Connect a DC voltmeter + lead to terminal 'O' or 'P'

(see Fig. 5-7A) on H.V. board and — lead to chassis ground.

Fig. 5-6. T970 primary current adjust. (A) Location of terminal M. Fig. 5-7. High Voltage adjustment. Location of (A) Terminals O and (B) Typical waveform. P, and (B) Location of R907.

5 -1 4

REV. B, OCT. 1974

Performance Check/Adjustment—326 (SN 300500-up)

b. ADJUST—R907 (see Fig. 5-7B) for a meter reading

o f—1900 volts.

c. Change the variable DC power source output voltage

between +9 and +32 volts. Set the INTENSITY control fully clockwise at +9 volts and fully counterclockwise at +32 volts.

d. CHECK—for less than ±40 volts change in the

-1900-volt level (—1860 volts to —1940 volts).

NOTE

If the high-voltage supply is out of regulation, check

the regulation of the low-voltage supplies (steps 4 and

5) before troubleshooting the high-voltage supply.

e. Return the variable DC power source to +9 volts.

f. INTERACTION—Adjusting the -1900-volt supply

will affect the display. Therefore, a complete calibration

must follow.

3. Adjust Intensity Limit (R1046)

NOTE

This step need not be performed unless display brightness is low or the CRT has been replaced. If intensity limit adjustment is changed or the CRT is replaced, be sure to recheck T970 Primary Current according to Step 1 page 5-14. To avoid burning the

CRT phosphor, it is advisable to defocus the trace

(FOCUS control full cw) while performing step 3.

a. Connect a precision DC Voltmeter between TP 1051

and TP 1055 (See Fig. 5-8). Set TIME/DIV switch to 1 ps.

b. Rotate the INTENSITY control fully cw and adjust

R1046 for an incremental voltage reading of 315 mV

±15.75 mV. Rotate the INTENSITY control fully ccw.

Remove the voltmeter connections from TP 1051 and

TP1055.

NOTE

If intensity limit cannot be adjusted within the stated

limits with R1046, select a different value of R 1044. If intensity limit is too high, increase the R1044

value. If intensity limit is too low, decrease the

R1044 value. Normally the correct value of R1044 will be somewhere between 470 kEL and 3.9 MSI.

Fig. 5-8. Intensity limit adjustments and test points.

4. Adjust +5-Volt Power Supply (R1004)

a. Connect a precision DC voltmeter between the

front-panel CAL OUT jack and chassis ground.

b. Remove Q9 from its socket on the CAL/SW circuit

board (see Fig. 5-9).

c. ADJUST—R1004 (see Fig. 5-9 for location) for a

meter reading of 0.500 volt.

d. Disconnect the precision DC voltmeter and replace

Q9.

e. Connect the precision DC voltmeter between terminal 'BZ' on the Horizontal board (see Fig. 5-9 for location) and chassis ground.

f. CHECK—for a meter reading of +5.0 volts, ±75 mV.

g. INTERACTION—may affect operation of all circuits

within the instrument.

5. Adjust -5-V olt Power Supply (R1030)

a. Connect the precision DC voltmeter between terminal 'BB' on the Horizontal board (see Fig. 5-9 for location) and chassis ground.

b. ADJUST—R1030 (see Fig. 5-9 for location) for a meter reading of —5 volts, ±25 mV.

e. INTERACTION—may affect operation of all circuits

within the instrument.

5-15

Performance Check/Adjustment—326 (SN 300500-up)

Fig. 5-9. R1030, —5 V supply adjustment and test point BB, R1004, +5 V supply adjustment and test point BZ, Q9, FOCUS, and INTENSITY

locations.

6. Check Low-Voltage Power-Supply Ripple and

Regulation

a. Set the following 326 front-panel controls:

TIME/DIV EXTHORIZ Vertical POSITION Position spot off screen

b. Connect a IX probe to the Test Oscilloscope vertical

input.

c. Set the Test Oscilloscope vertical deflection factor to

0.01 Volts/Div, AC Coupled, and sweep rate at 20 jUs/Div.

d. CHECK—the Test Oscilloscope display for ripple of each supply while varying the external DC voltage supply between +9 volts and +32 volts. Table 5-4 lists the supply voltage limits, ripple limits, and location of test point for each supply. See Fig. 5-9 and 5-10.

e. Disconnect the external DC supply and replace the Power Regulator in the 326. Reconnect the external DC supply or replace the internal battery pack.

TABLE 5-4

Supply

Voltage

Limits

Maximum

Ripple

Location of

Test Point

-5 V

Within

2%

10 mV

'BB' on

Horiz Board

+5 V

Within

2%

10 mV

'BZ 'on

Horiz Board

+ 14 V

±20%

200 mV

'BD' on

Horiz Board

+ 100 V

±5%

750 mV

'L ' on

Rect Board

+ 165 V +8%, -6% 750 mV

'K ' on

Rect Board

7. Adjust Variable Volts/Div Balance (R37-R237)

a. Set the 326 Mode switch to CH 1.

b. Vertically position the trace to the center graticule

line.

c. Rotate the CH 1 Var VOLTS/DIV control through- I

out its range noting the vertical trace shift.

5-16

REV. B, OCT. 1974

Performance Check/Adjustment—326 (SIM 300500-up)

Fig. 5-10. Location of test points BD, BE, K & L.

d. ADJUST—R37 (see Fig. 5-1 IB) for no trace shift as

the Variable VOLTS/DIV control is rotated. If necessary,

use the Vertical POSITION control to keep the trace on screen during this adjustment. Set Mode to CH 2.

e. Rotate CH 2 Var VOLTS/DIV throughout its range.

f. ADJUST—R237 (see Fig. 5-1 IB) for no trace shift as

the CH 2 Var VOLTS/DIV control is turned.

g. Return both CH 1 and CH 2 Var VOLTS/DIV con

trols to the CAL position.

h. Set Mode switch to CH 1.

8. Adjust CH 1 Vertical X10 Balance (R36)

a. Vertically position the CH 1 trace to the center

horizontal line.

b. Pull the CH 1 X10 VERT GAIN switch and check

trace shift as the knob is pulled.

c. ADJUST—R36 (see Fig. 5-1 IB) for minimum trace shift as the X 10 VERT GAIN switch is pulled out and pushed in. To prevent changing the knob position (rota tional) the X10 VERT GAIN switch can be actuated using the control bracket behind the front panel.

d. Push the CH 1 X10 VERT GAIN switch in and

switch Mode to CH 2.

9. Adjust CH 2 Vertical X10 Balance (R236)

a. Vertically position the CH 2 trace to the center

horizontal graticule line.

b. Pull the CH 2 X10 VERT GAIN switch and check

trace shift as the knob is pulled out.

c. ADJUST—R236 (see Fig. 5-1 IB) for minimum trace shift as the X10 VERT GAIN switch is pulled out and pushed in. To prevent changing the knob position (rota

tional) the X10 VERT GAIN switch can be actuated using the control bracket behind the front panel.

d. Push the CH 2 X10 VERT GAIN switch in. Switch Mode to C H I.

10. Adjust Deflection Plate DC Level R82-R84- R69 for CH 1, (R282-R284-R269 for CH 2)

a. CHECK—Vertical Trace Position: Connect a shorting strap between the collector of Q376 and the collector of Q386. Check that the vertical position of the trace is within ±0.3 division of graticule center (if it is not, select Q415-Q425 and Q410-Q420 for pair combinations whose

DC parameters meet this requirement).

b. ADJUST—Deflection Plate DC Level: Connect a DC Voltmeter (set for 10 V range) between terminal point B, the R74-R75 junction and terminal point A, the R76-R75 junction on the Vertical Preamp board (for CH 2 these are terminal point P, the R274-R275 junction and terminal point O, the R276-R275 junction). See Fig. 5-11 or Fig. 7-4 (A3 board photo on reverse side of diagram 1) for com ponent and test point locations.

REV. B, OCT. 1974

5-17

Performance Check/Adjustment-326 (SN 300500-up)

Fig. 5-11. Deflection Plate DC Level adjustment. Location of controls.

Set the Vertical POSITION control for zero voltage reading, then disconnect the voltmeter leads from the test points.

c. Connect the DC voltmeter (set for 100 V range) be tween ground and the collector of Q457. Adjust R82 (R282) for a reading of +50 V. Connect the DC voltmeter between ground and the collector of Q458. Adjust R84 (R284) for a

reading of +50 V. Repeat these adjustments to compensate

for any interaction.

d. ADJUST-Lim it Centering: Connect the Type 191

(or equivalent) sine-wave generator through the GR to BNC

adapter, 50 £2 BNC cable, 10X 50 £2 BNC attenuator, and a

50 £2 BNC termination to the appropriate VERT INPUT connector. Set the 191 to 50 kHz and depress the appropri ate DC coupling switch on the 326. Connect a 10X probe from the test oscilloscope between ground and the collector of Q457. Increase the Type 191 amplitude until the signal at the collector of Q457 begins to clip (equal clipping on top and bottom). Adjust R69 (R269) to position the signal so it is centered vertically on the graticule of the test oscilloscope. Repeat steps 10c and lOd to maintain +50 V at the collectors of Q457 and Q458 with no signal input, and a vertically centered display with a slightly clipped signal.

e. Perform steps 10b through lOd for CH 2 using the adjustments listed in parenthesis—(R282 etc.) with the sine-wave generator connected to the CH 2 INPUT.

11. Adjust Astigmatism (R1068)

Reset the following 326 controls:

Mode CH 1 CH 1 VOLTS/DIV .5 CH 1 AC-GND-DC DC TIME/DIV 1 ms

a. Set the INTENSITY control midway between a

barely visible trace and fully clockwise.

b. Connect a Time-Mark Generator (set to 1 ms markers) to the CH 1 VERT INPUT connector (use BNC cable). Trigger as necessary for stable display.

c. ADJUST—FOCUS (front panel) and Astig (R1068) controls (see Fig. 5-12A) for the best definition of the markers within the areas indicated in Fig. 5-12B.

12. Adjust Trace Alignment (R1060)

a. Vertically position the marker display baseline to the

graticule horizontal centerline.

b. ADJUST— R1060, Trace Rotation control (see Fig. 5-12A) to align the marker display baseline parallel to the graticule horizontal centerline.

5 -1 8

Performance Check/Adjustment—326 (SIM 300500-up)

f. Vertically position the trace to the top graticule line.

g. Trace deviation from a straight line should not exceed

1/2 minor division.

h. Vertically position the trace to the bottom graticule

line.

i. Trace deviation from a straight line should not exceed

1/2 minor division.

NOTE

It may be necessary to compromise the setting of R1062 to provide acceptable displays in steps c, g, and i.

14. Adjust Limit Centering (R69 and R269)

Set CH 1 and CH 2 VOLTS/DIV to 5 DIV CAL.

Set Mode to CH 1.

a. Vertically position the bottom of the display to the

first graticule line below the center line.

Fig. 5-12. (A) Location of Astigmatism, Trace Alignment, and Geometry controls and <B> Typical display. b. Reduce the display amplitude to two divisions, using

the Var VOLTS/DIV control.

13. Adjust CRT Geometry (R1062)

Set CH 1 VOLTS/DIV switch to .1.

a. Vertically position the marker display baseline below

the bottom of the graticule.

b. Adjust the INTENSITY control as necessary for

normal viewing brightness.

c. ADJUST-R1062, Geometry control (see Fig. 5-12A)

for minimum curvature of the vertical markers.

d. Disconnect the Time-Mark Generator from the instru

ment.

e. Set the TRIGGERING LEVEL/SLOPE control to

+AUTO.

c. Vertically position the top of the display to the top graticule line and check for compression (decrease in display amplitude).

d. Vertically position the bottom of the display to the bottom graticule line and check for compression.

e. ADJUST—R69, Limit Centering control, for least compression. Compression should not exceed 0.15 division. See Fig. 5-13 for location of R69 and R269.

f. Set Mode switch to CH 2 and repeat steps a through d.

g. ADJUST—R269, Limit Centering control, for least

compression.

El

5-19

Performance Check/Adjustment—326 (SN 300500-up)

Fig. 5-13. Location of Limit Centering and Vertical Gain controls.

15. Adjust CH 1 Vertical Gain (R65)

Set the 326 controls as follows: CH 1 VOLTS/DIV .01

Var CAL

Mode CH 1

CH 1-NORM CH 1

a. Connect the Standard Amplitude Calibrator output

to CH 1 VERT INPUT connector via a 50 £2 BNC cable.

b. Set the Standard Amplitude Calibrator for a 50-mV

square-wave output.

c. Vertically center the display about the center hori

zontal graticule line.

d. ADJUST—R65, XI Vertical Gain adjustment, for

5.00 divisions of display. See Fig. 5-13 for location of Gain controls.

16. Adjust CH 1 X10 Vertical Gain (R41)

a. Reset the Standard Amplitude Calibrator to 5 mV,

and pull the 326 CH 1 X10 VERT GAIN control.

b. Vertically center the display about the center hori

zontal graticule line.

c. ADJUST—R41, Vertical X10 Gain, for 5.00 divisions

of display.

17. Adjust CH 2 X I Vertical Gain (R265)

Reset the following controls:

Mode CH 2 CH 1-NORM NORM CH 2 VOLTS/DIV .01 Standard Amplitude

Calibrator 50 mV

a. Connect the Standard Amplitude Calibrator output

to CH 2 VERT INPUT connector.

b. Vertically center the display about the center hori

zontal graticule line.

c. ADJUST—R265, Vertical X I Gain, for 5.00 divisions

of display.

18. Adjust CH 2 X10 Vertical Gain (R241)

Reset Standard Amplitude Calibrator for 5 mV output

and pull CH 2 X10 VERT GAIN control.

a. Vertically center the display about the center grati

cule line.

b. ADJUST—R241, Vert X10 Gain, for exactly 5

divisions of display.

19. Adjust High Frequency Compensation

Reset the following controls:

CH 1 VERT GAIN pushed in CH 1 VOLTS/DIV 1 volt

Mode CH 1 CH 1-NORM CH 1 TIME/DIV 1 /is

a. Connect the Square-Wave Generator Fast-Rise+Out-

put connector to the 326 CH 1 VERT INPUT connector through a GR to BNC adapter; 42-inch, 5012, BNC cable; 50 12, 10X, BNC attenuator; and a 50 12 BNC termination.

b. Set the Square-Wave Generator for a four-division,

100 kHz display on the 326.

c. Move the leading edge of the square wave into the

viewing area.

5 -2 0

Performance Check/Adjustment—326 (SN 300500-up)

d. Set the Test Oscilloscope for 1 Volt/Div and

2 jus/Div.

e. Connect the Test Oscilloscope 10X probe tip to Q457

collector (case). See Fig. 5-14A for location.

f. ADJUST—R411 for best front corner of the flat top

on the Test Oscilloscope display.

(C)

Fig. 5-14. High frequency compensation adjustment. (A) Location of test points, (B) Location of controls, and (C) Typical waveform.

g. Connect the probe tip to Q458 collector.

h. ADJUST—R421 for best front corner of the flat

bottom on the Test Oscilloscope display.

i. PULL XIOHORIZ MAG.

j. ADJUST—R418, R428, C417, C427, C418, and C428

for best front corner. See Fig. 5-14B for location of

controls.

k. ADJUST—C40, CH 1 Vertical Amp board, for best

front corner. See Fig. 5-14B for location of C40 and C240.

I. Move the signal source from CH 1 to CH 2 and switch

Mode to CH 2 and TRIGGERING from CH 1 to NORM.

m. ADJUST—C240, CH 2 Vertical Amp board, for best

front corner. See Fig. 5-14C for typical waveform indi

cating correct high frequency adjustment.

20. Adjust Input Capacitance (C21-C221)

Reset the following 326 controls: CH 1—CH 2 VOLTS/DIV .01

Mode CH 1 TIME/DIV .5 ms CH 1-NORM CH 1

a. Install the calibration shield on the 326.

b. Connect the Square-Wave Generator High-Amplitude

+Output to the CH 1 VERT INPUT connector through a

GR to BNC adapter; 42-inch, 50 12, BNC cable; 10X, 50 12, BNC attenuator; 5012, BNC termination; and 47 pF Input RC Normalizer, in the order given.

c. Set the Square-Wave Generator for a five-division

display at 1 kHz.

d. ADJUST—C21 (see Fig. 5-15A for location) for minimum overshoot and rounding of the leading edge of the square wave as shown in Fig. 5-15B.

Reset Mode switch to CH 2. Connect the square-wave signal to CH 2 VERT INPUT. Switch CH 1-NORM to NORM.

5-21

Performance Check/Adjustment—326 (SN 300500-up)

Fig. 5-15. Input capacitance adjustment (A) Location of controls,

(B) Typical waveform, and (C) Location of Volts/Div switch compensation.

e. ADJUST—C221 for minimum overshoot and rounding of the leading edge of the square wave as shown in Fig. 5-15B.

f. Remove the signal and the 47 pF Input RC Normal-

izer.

21. Adjust Volts/Div Switch Compensation

Reset the following 326 controls:

CH 1 VOLTS/DIV 0.1 CH 1-NORM CH 1

a. Connect the P6049A Probe to the 326 CH 1 VERT

INPUT connector.

b. Install a GR to BNC adapter; 10X, 50 £2, BNC

attenuator; and BNC to Binding Post adapter on the

Square-Wave Generator High-Amplitude Output connector

in the order given.

c. Connect the P6049A Probe tip to the binding post

adapter.

d. Set the square wave generator for a five-division

display at 1 kHz.

e. Compensate the probe as described in the probe

instruction manual.

f. ADJUST and CHECK-VOLTS/DIV switch com

pensation as detailed in Table 5-5 (use low-capacitance screwdriver). First adjust for best square corner and then I for flat top (see Fig. 5-15C for location of controls).

g. Set CH 2 VOLTS/DIV to 0.1 and CH 1-NORM to

NORM.

h. Move the probe to CH 2 VERT INPUT and repeat

steps d through f for CH 2 (adjust C223 through C228).

TABLE 5-5

VOLTS/DIV Compensation

VOLTS/DIV Attenuator

Adjust for

Setting

Compensated

Square Corner

Flat Top

.01 XI

Compensa

te Probe

.02

X2 C27B

C27A

.05

X5

C28B

C28A

Remove external 10X attenuator

.1 X10 C23B

C23A

.2

Check

If out of tolerance, compro mise setting at .1 and .2 for best overall response.

5-22

Performance Check/Adjustment—326 (SN 300500-up)

TABLE 5-5 (cont)

VOLTS/DIV

Attenuator

Adjust for

Setting Compensated

Square Corner

Flat Top

.5 Check

If out of tolerance, compro mise setting at .1, .2, and .5 for best overall response.

1

X100

C24B

C24A

2 Check If out of tolerance, compro

mise setting at 1 and 2 for best overall response.

Pull 10X VERT GAIN switch

5

Check

If out of tolerance, compro mise setting at 1,2, and 5 for best overall response.

10

X200

C25B

C25A

i. Disconnect all test equipment.

j. Remove Calibration Shield.

22. Adjust Magnified Registration (R713)

Reset the following controls:

VOLTS/DIV

.5

CH 1 INPUT

DC

Mode

CH 1

CH 1-NORM

CH 1

Fig. 5-16. (A) Timing Adjustments and controls. (B) Typical

Waveform.

a. Connect the Time-Mark Generator to CH 1 VERT

INPUT connector through a 42-inch, 50 £2, BNC cable and f. Push the X10 HORIZ MAG switch in.

a 50 £2 termination.

b. Set the Time-Mark Generator for 5 ms markers and

set the 326 TRIGGERING controls for a stable display.

c. Position the middle marker (three markers displayed)

to the center vertical graticule line.

d. Pull the X10 HORIZ MAG switch. To prevent changing knob position (rotational) the X10 HORIZ MAG switch can be actuated using the Horizontal Position control bracket behind the front panel.

e. ADJUST—R713 (see Fig. 5-16A for location) to position the middle marker to the center vertical line.

23. Adjust Normal Timing

a. Set R611 (see Fig. 5-16A) midway between just triggered display and auto sweep (remove signal to deter mine auto sweep).

REV. B, OCT. 1974

5-23

Performance Check/Adjustment—326 (SN 300500-up)

b. Set the Time-Mark Generator for 1 ms markers.

c. Set TRIGGERING controls for stable display.

NOTE

Unless otherwise noted, use the middle eight hori

zontal divisions (between the second and tenth

vertical graticule lines) when checking or adjusting timing.

e. ADJUST— R704 (see Fig. 5-16A), Position Centering, to move the first marker two and one-half divisions to the right of graticule center.

f. Turn the Horizontal POSITION control fully counter

clockwise and check for approximately two and one-half

divisions from end of trace to graticule center.

g. ADJUST—R704 (if necessary) to set the distance from trace start to the center graticule line equal to the distance from end of trace to graticule center.

d. ADJUST—R702, XI Gain (see Fig. 5^16A for loca tion) for one marker per division over the center eight divisions. The first and ninth markers must coincide exactly with their respective graticule lines (reposition horizontally as needed). See Fig. 5-17.

24. Adjust Sweep Length and Centering (R618-R704)

a. Adjust the TRIGGERING controls for a stable

display.

h. INTERACTION—R702 may have to be readjusted

slightly to correct timing.

25. Adjust Magnified Timing (R717)

a. Set the Time-Mark Generator for .1 ms markers.

b. Set the 326 Horizontal POSITION control to mid

range and pull the X10 HORIZ MAG knob.

b. Set the tenth marker (see Fig. 5-17) to the tenth

vertical graticule line.

c. ADJUST—R618 (see Fig. 5-16A), Sweep Length adjustment, for a sweep length of 10.7 divisions (0.7 divi sion of display to the right of the tenth marker).

d. Turn the Horizontal POSITION control fully clock

wise.

Fig. 5-17. Adjusting sweep length and centering. Typical waveform.

c. ADJUST—R717 (see Fig. 5-16A), X10 Gain adjust

ment, for one marker per division over the center eight divisions. The second and tenth markers must coincide exactly with their respective graticule lines.

26. Adjust High Speed Timing

Reset the following 326 controls:

TIME/DIV 1 jus X10 HORIZ MAG PULL Horizontal POSITION midrange

Set the Time Mark Generator for .1 jus markers.

a. Observe approximately 1 marker per division dis

played on 326.

b. ADJUST—C620F (see Fig. 5-16A) for best timing

(1 marker per division).

c. Horizontally position the trace start to the viewing

area.

d. ADJUST—C701 and R706 (see Fig. 5-16A) for best

sweep start linearity.

5 -2 4

REV. B, OCT. 1974

Performance Check/Adjustment—326 (SIM 300500-up)

e. Horizontally position the end of trace to the viewing

area.

e. ADJUST—C538 (see Fig. 5-18B) for the best square

wave (minimum rounding or overshoot). Use a low capa

citance screwdriver.

f. ADJUST—C782 for best sweep end linearity. See Fig.

5-16A and B for location of controls.

27. Adjust External Horizontal 10X Compensa

tion (C538)

28. Adjust Battery Charger Charge Rate

a. Plug the battery charger banana plugs into the battery pack jacks, being sure that polarity is correct (mount the charger in the same position, relative to the battery pack, that it would be in if charging the battery pack in the instrument).

Set the 326 controls as follows: TIME/DIV

TRIGGERING HORIZMAG

EXTHORIZ ATTEN

(side panel)

EXT HORIZ EXT DC

Pushed in

X10

a. Connect the Standard Amplitude Calibrator to EXT TRIG OR HORIZ INPUT. Set Standard Amplitude Cali brator for a 5-volt square wave.

b. Connect a properly compensated probe to the Test

Oscilloscope Input.

c. Set the Test Oscilloscope for a vertical deflection

factor of .02 Volt/Div and a sweep rate of .5 ms/Div.

b. Connect a banana-banana patchcord from the nega

tive battery pack output terminal to the negative external

DC supply banana plug. See Fig. 5-19.

Charger

0.3-ohm resistor. R1115

Battery Pack

d. Connect the probe tip to point G on the 326 Fig. 5.19. Ground connection required to charge Battery Pack

Horizontal Circuit board (see Fig. 5-18A for location). outside of instrument.

REV. B, OCT. 1974

5-25

c. Connect a precision DC voltmeter across the 0.3-ohm

resistor (R1115) in the battery pack.

Performance Check/Adjustment—326 (SN 300500-up)

d. Set the FULL CHG—TRICKLE switch to FULL

CHG.

e. Plug the AC power cord into the variable line voltage

source set to 115 volts.

f. ADJUST—R1144 for 0.045 volt (150 mA charge rate)

across R1115 (0.3 ohms).

g. Vary the line voltage between 90 and 136 volts.

h. CHECK—Voltage drop across R1115 should notvary

more than ±5 mV.

i. Switch the FULL CHG—TRICKLE switch to

TRICKLE.

j. CHECK—For approximately 13 mV across R1115.

5-26

326 (SN 300500-up)

ELECTRICAL PARTS LIST

Replacement parts should be ordered from the Tektronix Field Office or Representative in your area. Changes to Tektronix products give you the benefit of improved circuits and components. Please include the instrument type number and serial number with each order for parts or service.

ABBREVIATIONS A N D REFERENCE DESIGNATORS

A

Assembly, separable or FL

Filter

PTM

paper or plastic, tubular

repairable H Heat dissipating device

molded

AT

Attenuator, fixed or variable (heat sink, etc.) R

Resistor, fixed or variable

B

Motor HR Heater

RT

Thermistor

BT

Battery

J Connector, stationary portion

S

Switch

C

Capacitor, fixed or variable

K

Relay

T

Transformer

Cer

Ceramic

L

Inductor, fixed or variable

TP

Test point

CR

Diode, signal or rectifier

LR Inductor/resistor combination U

Assembly, inseparable or

CRT cathode-ray tube

M Meter

non-repairable

DL

Delay line

Q

Transistor or silicon-

V

Electron tube

DS

Indicating device (lamp)

controlled rectifier Var

Variable

Elect.

Electrolytic

P

Connector, movable portion

VR Voltage regulator (zener diode,

EMC

electrolytic, metal cased

PMC

Paper, metal cased

etc.)

EMT

electrolytic, metal tubular

PT paper, tubular

WW

wire-wound

F

Fuse

Y Crystal

Tektronix Serial/Model No.

Ckt. No.

______

Part No. Eff

__________

Disc

_____________________

Description

ASSEMBLIES

A1 A2 A3 A4A A4B A5 A6 A7 A8 A9 A10 All A12 A13 A14

670 -1 829 -0 0 670 -1 830 -0 0 670-1 82 5-0 1 670 -2 417 -0 0 670-2 41 6-0 1 670- 18 23- 01 670- 18 27- 00 670 -1 828 -0 0 670- 18 18- 01 670-1 81 9-0 1 670- 18 24- 01 670- 18 21- 01 670-1 82 0-0 1 670-1 82 2-0 1 670- 18 26- 00

CH 1 AC-DC C irc u it Board Assembly CH 2 AC-DC C ircu it Board Assembly VERTICAL PREAMP. C ircu it Board Assembly CAL SWITCHING C ircu it Board Assembly ATTENUATOR C irc u it Board Assembly VERTICAL OUTPUT C ircu it Board Assembly TRIGGER SOURCE C ircu it Board Assembly TRIGGER SOURCE COUPLING C ircu it Board Assembly TRIGGER-SWEEP C irc u it Board Assembly TIMING C ircu it Board Assembly HORIZONTAL C ir c u it Board Assembly POWER REGULATOR-RECTIFIER C irc u it Board Assemblu POWER REGULATOR-HV C irc u it Board Assembly POWER REGULATOR-CONTROL C irc u it Board Assembly BATTERY CHARGER C ircu it Board Assembly

BATTERY

BT111 5 146 -0 01 8-0 0

Bat te ry , set of 9 NiCd cel ls

CAPACITORS

Cl

283 -00 59 -00

C2

283 -00 59 -00

C3

290- 018 3- 01

C 5

283 -0 023 -0 0 C 6 290-01 83- 01 C 7

290- 01 14 -0 2 C8 290- 01 14 -02 C19

283 -00 03 -00 C2 0

285 -08 41 -00 C2 1

281- 01 93- 00 C23A

281- 01 95 -0 0

1 pF , C e r , 2 5 V , +80%-20 % 1 pF , C e r , 2 5 V , +80%-2 0% 1 pF , Elec t ., 3 5 V , 10%

0. 1 pF , C e r , 1 0 V , +80%-20 % 1 pF, El e ct ., 35 V, 1 0% 47 pF , Elect., 6 V, 10 % 4 7 pF, Elect., 6 V, 10 %

0.01 pF , C e r, 150 V , +80%- 20%

0.0 185 pF , PTM , 50 0 V , 10 % 2- 8 p F , Var , Ce r

5.5- 18 pF, Var , C e r

6-1

f:

Electrical Parts List—326 (SIM 300500-up)

ELECTRICAL PARTS LIST (co n t)

Ckt. No.

Tektronix Serial/Model No.

Part No. Eff Disc

Description

CAPACITORS (cont)

C2 3 B

281- 019 4- 00

C23 C

281- 060 0- 00

C24A

281- 019 5- 00 C2 4 B 281 -0 194 -0 0 C24 C

283-0 597 -01

C25A .

281- 019 5- 00 C2 5 B

281-0 19 4-0 0 C25 C

283- 068 5-0 0

C27A

281-0 19 4-0 0 C2 7 B

281- 019 5- 00

C27 C

281- 059 2-0 0 C27 D

283-0 20 1-0 0 C28A

281-0 19 5-0 0 C2 8 B

281- 019 4- 00 C3 0

283- 006 8-0 0 C31

290- 0183 -01

C4 0

281-0 12 2-0 0 C41

281- 062 2-0 0 C48

283- 000 3-0 0 C9 5

283- 000 3-0 0

C20 1

283- 005 9-0 0 C20 2

283- 005 9-0 0 C2 0 7

290- 011 4-0 2 C208

290-0 11 4-0 2 C22 0

285-0 84 1-0 0

C22 1

281- 019 3- 00 C223A

281- 019 5- 00 C22 3 B

281-0 19 4-0 0 C223 C

281- 060 0- 00 C224A

281-0 19 5-0 0

C2 24 B

281- 019 4-0 0

C224 C

283-0 597 -01 C225A

281- 019 5- 00

C2 25 B

281-0 19 4-0 0 C225 C

283-0 68 5-0 0 C227A

281-0 19 4-0 0

C22 7 B

281- 019 5-0 0 C227C

281- 059 2-0 0

C227 D

283- 020 1- 00

C228A

281-0 19 5-0 0

C22 8 B

281- 019 4- 00

C2 3 0

283-0 06 8-0 0

C23 1

290- 0183 -01 C24 0

281-0 12 2-0 0 C24 1

281-0 62 2-0 0

C24 8

283- 000 3- 00 C33 2

283- 002 8-0 0 C334

285-0 68 5-0 0

C3 3 5

281-0 51 8-0 0 C34 2 2 83- 00 28-0 0 C34 5 28 1-0 518 -0 0

2- 8 pF , V ar , Cer

35 pF , Ce r , 10 %

5.5- 18 p F, Va r , C e r 2-8 p F , Va r , Ce r 47 0 p F , Mica, 300 V , 10 %

5.5- 18 p F , V ar , Ce r 2-8 pF, Va r , Ce r 100 0 pF , Mica, 300 V, 10 % 2- 8 p F , V ar , Cer *

5.5- 18 p F , V ar , Cer

4.7 p F , Cer , ±0. 5 pF 2 7 pF , Ce r , 200 V , 10%

5.5- 18 p F , Va r , Ce r 2-8 pF, Va r , Ce r

0.01 pF , Ce r , 50 0 V , +100%-0% 1 pF , El ec t ., 35 V , 10 %

2.5- 9 pF , V ar , Ce r , 10 0 V 4 7 pF, C e r, 50 0 V, 1%

0.01 p F , Ce r , 15 0 V , +80%-20 %

0.01 pF , Ce r , 15 0 V , +80%-2 0%

1 p F , Ce r , 2 5 V , +80%-20 % 1 p F , C e r , 25 V , +80%-20 % 47 pF , El ec t. , 6 V , 10 % 47 pF , Elect. , 6 V , 10%

0.0 185 pF , PT M , 50 0 V , 10 % 2-8 p F , Va r , Cer

5.5- 18 p F , Va r , Cer 2-8 p F , Va r , Cer 35 pF, Ce r , 10 %

5.5- 18 pF , Var, Ce r 2-8 p F , Va r , Cer

47 0 p F , Mica, 30 0 V , 1 0%

5.5- 18 pF , Var , Ce r 2-8 pF, V ar , Ce r 100 0 pF , Mica , 300 V , 10 % 2-8 p F , V a r, Ce r

5.5- 18 pF , Var, Ce r

4. 7 p F , Ce r , ±0.5 pF 27 p F , Ce r , 20 0 V, 10%

5.5- 18 p F , Va r , Ce r 2-8 p F , Va r , Cer

0.0 1 p F , Ce r , 50 0 V , +10 0%-0 % 1 pF , Elect ., 3 5 V , 10%

2.5- 9 pF, Va r , Ce r 4 7 pF , Ce r , 50 0 V, 1%

0.01 pF , Ce r , 15 0 V , +80%-20 %

0.0 022 pF , Ce r , 5 0 V

0.00 68 pF , PT M, 10 0 V, 10% 47 pF , C er , 5 00 V , 2 0%

0.00 22 pF , C e r , 50 V 47 p F , Ce r , 500 V , 20 %

s

6-2

Electrical Parts List—326 (SN 300500-up)

ELECTRICAL PARTS LIST (cont)

Tektronix Serial/Model No.

Ckt. No.

Part No.

Eff

Disc

Description

CAP AC ITO RS

Cc ont )

C3 5 0 290-018 3-0 1

1 yF , Elect., 35 V , 10 %

C3 52

283 -0 23 0- 00

47 0 pF , Ce r , 50 0 V , 20%

C36 1 283-0 05 9- 00

1 yF, C e r , 25 V, +80%- 20%

C3 9 0

281 -06 00 -00

X30 07 06

35 pF , Ce r , 10 %

C3 97 283-01 11 -0 0

0.1 yF , Ce r , 50 V

C4 0 0 283 -00 03 -0 0

0.0 1 y F , Ce r, 15 0 V , +80%-20%

C411

281 -0 63 0- 00 30 05 0 0

30 12 99

39 0 pF , C e r , 50 0 V, 5%

C411

283 -0 23 1- 00

30 13 0 0

47 0 p F , Ce r , 50 0 V , 10%

C41 3

283 -0 23 1- 00

47 0 p F , Ce r , 50 0 V , 10%

C4 17 281-0 12 3- 00

5- 25 p F , Va r , C e r , 10 0 V

C418 281 -0 12 2- 00

2.5 - 9 p F , Var , Ce r , 10 0 V

C42 1

281 -0 63 0- 00

30 05 0 0

301 2 99

39 0 p F , Ce r , 5 0 0 V, 5%

C421

283 -0 23 1- 00

301 3 00

47 0 p F , Ce r , 5 0 0 V, 10%

C4 2 7

281 -0 12 3- 00

5-2 5 p F , Var, Ce r , 100 V

C42 8

281 -0 122 -0 0

2. 5- 9 pF , Va r , Cer , 10 0 V

C4 30 283-0 22 4- 00

5 p F , V e r , 50 V, +/-0 .5 pF

C44 4 283-0 23 0- 00

47 0 p F , Ce r, 50 0 V, 20%

C4 4 6

283- 02 30- 00

470 p F , Ce r , 5 0 0 V, 20 %

C4 4 9 28 3-0 23 7-0 0

0. 1 yF , Ce r , 25 V, +80%-20%

C45 2

283 -0 23 7- 00

0. 1 yF , C e r , 25 V, +80%-20%

C45 4 283-02 37 -0 0

0. 1 yF, C e r , 25 V, +80%-20%

• C457 283-00 59 -0 0

1 yF , C e r , 2 5 V , +80%-20%

C45 8 283-0 059 -0 0

1 yF , C e r , 2 5 V , +80%-20%

C4 6 0

283 -0 329 -0 0

0. 3 9 pF, Ce r , 50 0 V , +80%-20%

C46 2

283 -0 23 5- 00

0. 05 yF , C e r , 50 V, +100%-0%

C46 4

283 -0 06 8- 00

0.0 1 yF, C e r , 50 0 V , +100%-0%

C4 70

283- 03 29- 00

0. 3 9 p F , Ce r , 5 0 0 V , 10 %

C4 72

283 -0 23 5- 00

0.0 5 yF , Ce r , 5 0 V , +100%-0%

C47 4

283- 00 68 -0 0

0.0 1 y F , C e r , 50 0 V , +100%-0%

C47 6

283 -0 059 -0 0

1 y F , C e r, 25 V , +80%-20%

C47 8 283-00 59 -00

1 yF , C e r , 2 5 V , +80%-20 %

C48 0

290 -02 71 -00

9 y F, Elec t ., 12 5 V , +20%-15%

C508 281- 05 41- 00

30 05 00

301 2 9 9

6. 8 p F , Ce r, 500 V, 10 %

C50 8

281 -0 60 0- 00

30 13 0 0

35 p F , Ce r , 50 0 V , 10%

C51 0

283 -0 003 -0 0

0.0 1 y F , C e r , 15 0 V , +80%-20%

C538

281- 0060 -01

2-8 p F , V a r , Ce r

C5 3 9

283-06 02- 01

53 p F , Mic a , 30 0 V , 5%

C54 0

283 -00 68 -00

0.0 1 y F , C e r , 50 0 V , +100%-0%

C54 2 283- 01 04- 01

0.0 02 yF , C e r , 50 0 V, 5%

C54 8 29 0-0 136 -01

2. 2 yF , Ele ct . , 20 V, 20%

C5 4 9

283 -0 067 -0 0

0.00 1 y F , C e r , 20 0 V , 10%

C55 5

283 -02 47 -00

68 0 p F , Ce r , 5 0 0 V, 10%

C5 58

283- 00 24 -0 0

0. 1 yF, Cer , 3 0 V , +80%-20%

C56 4

290- 013 6-0 1

2. 2 yF , Ele ct . , 20 V , 20%

C565A 290-04 60- 00

10 yF , Ele c t. , 25 V , 20 %

C56 5B

290- 0183 -01

1 y F , Elec t. , 35 V , 10 %

C565C

290- 04 50- 00

0. 1 yF , Elec t. , 35 V, 20%

RE V . B O CT . 197 4

6-3

Electrical Parts List—326 (SN 300500-up)

ELECTRICAL PARTS LIST (co n t)

Ckt. No

Tektronix Serial/Model No.

Part No. Eff Disc

Description

CAPACITORS (c o nt)

C5 66

283- 02 28- 00

C5 7 2

283- 022 8- 00

C5 9 0

290- 04 57- 00

C5 9 5

290 -04 57 -00

C61 1

281 -0 650 -0 0

C6 1 5

283 -0 231 -0 0

C6 1 6

283- 02 36 -0 0

C620A -'

f

C6 20 B

295 -01 34 -00

C62 0C C6 2 0 D , C62 0 E

283 -07 20 -00

C62 0F

281 -01 23 -00

C6 2 6

281 -05 23 -00

C6 28

281 -0 503 -0 0

C6 3 0

281 -06 22 -00

C6 3 6

283- 02 31- 00

C6 4 2

290-0 13 6-0 1

C6 4 4

283- 02 36- 00

C64 8

290- 013 6- 01

C6 5 0

281- 05 50 -0 0

C6 5 5

290 -01 34 -02

C660A

290- 016 7-0 1

C6 60 B

283 -0 203 -0 0

C6 61

283 -0 232 -0 0

C6 6 3

281 -05 23 -00

C67 1

283- 067 5- 01

C6 7 2

290-0 13 6-0 1

C6 7 9

283 -00 79 -02

C6 8 4

283- 02 31 -0 0

C6 8 6

283 -02 36 -00

C6 8 7

283 -02 30 -00

C6 8 8

283 -00 68 -00

C6 94

283 -0 068 -0 0

C6 9 5

290 -04 57 -00

51 pF , C e r , 50 V , 10 % 51 p F , Ce r , 50 V, 10 %

4. 7 pF, Ele c t. , 1 0 V , 20 %

4. 7 pF , El ec t. , 1 0 V , 2 0 % 18 p F , Ce r , 20 0 V , 10 % 47 0 p F , Ce r , 50 0 V , 10 %

0.0 1 pF, Ce r , 5 0 V , 20 %

1 pF,

0.1 p F ,

0.01 p? Ti min8 capa ci to r

0.00 1 pF, 27 5 pF , Mica, 50 0 V , 1% 5-2 5 pF , Var , Ce r , 10 0 V

100 p F , Ce r , 350 V, 10 %

8 p F , Ce r , 50 0 V , ±0. 5 pF 47 p F , Ce r , 50 0 V , 1% 47 0 p F , Ce r , 5 00 V , 10 %

2. 2 pF, Elect ., 20 V, 20 %

0.01 pF , C e r , 5 0 V, 20%

2. 2 pF , El e ct ., 2 0 V, 20%

12 0 pF , Cer, 50 0 V , 1 0 %

22 pF , Elect., 15 V , +20%-0% 10 pF , Elec t. , 1 5 V

0.4 7 pF , C e r , 50 V , 20%

0.00 5 pF , Ce r , 50 V , 20 % 10 0 p F , Ce r , 35 0 V , 10 % 82 p F , Mica, 30 0 V , 1 %

2. 2 p F , Ele c t. , 2 0 V, 20 %

0.01 p F , C e r , 25 0 V , 20 % 47 0 p F , Ce r , 50 0 V, 10%

0.01 pF , C e r , 5 0 V, 20% 47 0 pF , Ce r , 500 V, 20%

0.01 pF, C e r , 500 V , +80% -20 %

0.01 p F , C e r , 50 0 V , +10 0%- 0%

4. 7 pF, El ec t. , 10 V , 2 0 %

• '• In d ivid u al timin g capac it or s in thi s assembl y must be order ed b y the 9 di gi t part number, letter su ffi x an d tole ran ce pri nte d on t he timin g capaci to r to be rep l ac e d. Example:

285-XXX X-X X F "

6-4

The lett er suffix an d the tole ran ce sh oul d be the same for al l o f the tim i ng ca paci tors in the ass e mb l y .

Electrical Parts List—326 (SN 300500-up)

ELECTRICAL PARTS L IST (c o n t)

Tektronix

Serial/Model No.

Ckt. No.

Part No.

Eff

Disc ;

Description

CAPACITORS

(c o nt)

C6 9 6

290 -0 45 7- 00

4. 7 pF , E le c t. , 10 V , 20 %

C70 1

281 -0 12 3- 00

30 00 0 0 300 65 5

5- 25 pF , Var , Ce r , 10 0 V

C70 1

281 -0 15 8- 00

30 06 5 6

7- 4 5 pF , Var, Ce r

C7 0 2

281- 05 23 -0 0

10 0 pF , Ce r , 3 5 0 V, 10%

C7 0 5

283 -0 231 -0 0

300 5 0 0

300 5 0 5

47 0 pF , Ce r , 5 00 V , 10 %

C7 0 5

283 -0 33 6- 00

30 05 0 6 330 p F , Ce r , 50 0 V , 10 %

C7 2 2

281 -0 10 3- 00

30 05 00

300 5 05 1 8 0 pF , Ce r , 500 V, 5%

0,122 28 3-0 72 7- 00

300 5 0 6

300 6 55

33 0 pF , Mic a , 50 0 V , 5 %

0122

283 -0 10 3- 00

300 6 5 6 18 0 pF , Ce r , 5 00 V, 5%

C73 6

283- 02 30 -0 0

47 0 pF , Ce r , 5 0 0 V, 20 %

C7 5 0

283- 02 41 -0 0 3005 00

300 5 05

0. 2 p F , Ce r , 5 00 V , 20 %

C7 5 0

283- 03 29 -0 0

30 05 0 6

0. 39 pF , Ce r , 5 0 0 V , 10 %

C75 4

283- 02 33 -0 0

0.0 02 2 pF , Cer , 50 0 V, 20%

C7 6 0

290- 04 49 -0 0

3 pF, El e ct ., 25 0 V, +100% -0%

C7 62

283 -0 23 1- 00

47 0 pF , Ce r , 500 V, 10 %

C7 63

281- 06 22 -0 0

4 7 pF , Ce r , 5 0 0 V, 1 %

C7 64

283- 00 79 -0 2

0.0 1 p F , Cer, 25 0 V , 20 %

C7 8 2

281- 00 95 -0 0

0.2 -1 .5 pF , Var , Teflon

C7 84 '

283- 02 40 -0 0

1 p F , C e r , 50 0 V , 20 %

C7 91

290- 01 14- 01 C7 9 2 290- 01 14 -0 1 C8 70 B

290- 05 62 -0 0

C87 8

290- 01 64 -0 0

C8 87

283 -0 20 3- 00

C8 92

283- 02 31 -0 0

C89 4

283- 05 97 -0 1

C89 6

283- 05 97 -0 1

C8 98

290 -0 136 -0 1

C9 0 5

283 -0 000 -0 1

C9 1 0

283- 01 11 -0 0

C95 8

290- 01 67- 01

C9 5 9

290 -0 565 -0 0

C9 6 2

290- 01 67- 01

, C96 4

290- 01 83- 01

C9 6 6

290- 01 83 -0 1

C9 9 0

290 -0 44 9- 00

C9 92

290- 05 63 -0 0

C99 4

290- 04 63 -0 0

C10 00

290 -0 64 3- 00

C100 8

283 -0 003 -0 0

C10 14

290 -01 34 -01

C10 16

290- 06 43 -0 0

C10 22

283- 00 03 -0 0

C10 26

283- 00 03 -0 0

C10 32

290- 013 4- 01

C10 40

( 7)

283- 01 51 -0 0

C104 1

( 7)

283- 01 51 -0 0

C10 4 2

( 7)

283 -0 15 1- 00

4 7 uF , Ele ct . , 6 V 4 7 uF , Ele c t. , 6 V 21 0 pF , El ec t. , 40 V , +75%-10% 1 pF , Elec t. , 150 V

0. 4 7 pF , Ce r , 50 V , 20 % 47 0 p F , Ce r , 5 0 0 V , 10 %

47 0 p F , Mica , 30 0 V , 10 %

47 0 p F , M ic a , 30 0 V, 10%

2. 2 pF , El e ct ., 20 V , 20%

0.0 01 pF , C e r , 5 00 V , +100%-0%

0.1 pF, C e r , 5 0 V 1 0 pF , El ec t ., 15 V

15 0 pF , Elec t ., 6.3 V , 10 % 10 pF, E le c t ., 1 5 V 1 pF, Ele c t ., 35 V, 10 %

1 p F , Ele ct ., 35 V, 10 %

3 p F , Elec t. , 2 5 0 V , +100%-0%

1 8 pF, E le c t ., +50%-10%

47 pF, Elec t ., 2 0 V, 20% 47 0 pF, Elec t ., 10 V , 20 %

0. 01

pF, C e r ,

15 0

V ,

+80% -

- 20 %

22 pF, Ele c t.

, 15

V ,

20 %

47 0 pF , E le ct

., 10 V

, 20%

0. 01

p F , Cer ,

15 0

V,

+8 0 % - -2 0%

0.0 1

p F , Ce r,

15 0

V ,

+8 0 % - -2 0%

2 2 yF , El e ct .

, 15

V ,

20 %

0.0 1

p F , Ce r,

50 0

V

0.0 1

p F , Cer,

50 0

V

0.0 1

p F , Ce r,

50 0

V

m 6-5

Electrical Parts List-326 (SN 300500-up)

Ckt Grid Tektronix Serial/Model No. No. Loc Part No.

____

Eff

__________

Disc Description

CAPA CI TO RS

(con t)

C1 04 6 283 -02 93 -00

0.0 5 pF , Ce r , 1000 V , +100% -0%

C10 4 8

283- 02 93- 00

0.0 5 pF , Cer , 1 00 0 V , +100%-0%

C1 05 0 283 -00 68 -00

0.01 yF, Ce r , 50 0 V, +100%- 0%

C10 52

283- 029 2- 00

3005 00 300 50 5 0.04 pF , Cer , 200 0 V , +100 %-0%

C105 2A

283 -01 05 -00 300 506

0.0 1 pF, Ce r , 2000 V , +100%-0 %

C1 05 2B

283-0 10 5-0 0 3005 06

0.0 1 pF, Ce r , 2000 V , +10Q% -0%

C10 5 5 • 283- 017 7-0 0

1 uF , Ce r , 25 V , +80%-20 %

C1 06 2

283- 000 3- 00

0.0 1 pF , Cer , 150 V , +80%-20 %

C10 6 8

283- 00 03- 00

0.01 pF, Ce r , 150 V , +80%-20 %

C1 10 5

290-0 28 7-0 0

47 pF, Elect. , 2 5 V , 20 %

C1 12 3 283-011 0-0 0

0.0 05 pF , C e r, 150V

C1 1 36

290-0 11 4-0 1

47 pF, Elect. , 6 V

DIOD ES

CR 11

152- 03 27- 00

50 V, 75 m A , BAX 1 3

CR 1 2

152- 032 7-0 0

50 V , 75 mA , BAX 1 3

CR1 3 152 -0 327 -0 0

50 V , 75 mA , BAX 1 3

CR3 0

152- 024 6- 00

Sil i co n, CD1 267 6 or FD 33 75

CR 31

152- 02 46- 00

Sil i co n, CD1 267 6 or FD3 3 75

CR 3 2

152- 02 46- 00

Si li c on , CD12 676 or FD 33 75

CR 33 15 2-0 246 -0 0

Sil i co n, CD12 676 or FD3 37 5

CR50A 152-0327 -00

50 V , 7 5 m A, BAX 13

CR5 0B

152- 032 7- 00

50 V , 75 mA, BAX 1 3

CR7 4 152- 032 7- 00

50 V , 7 5 mA, BAX 1 3

CR 75 152 -0 327 -0 0

50 V, 75 m A , BAX 1 3

CR7 6

152- 032 7- 00

50 V , 75 mA, BAX 1 3

CR 7 7 152-032 7-0 0

50 V , 75 mA , BAX 13

CR 7 9

152- 032 7-0 0

50 V, 75 m A , BAX 13

CR 8 0

152-0 07 1-0 0

Ger ma niu m, ED- 2007

CR8 1 152 -00 71- 00

Germ ani um , ED -20 07

CR8 2

152-0 32 7-0 0

50 V , 75 mA, BAX 13

CR 83 152 -00 71- 00

Ger ma niu m, ED- 2007

CR8 4 152- 00 71- 00

Ger ma niu m, ED-200 7

CR 86

152-0 32 7-0 0

50 V , 75 mA, BAX 13

CR2 3 0 152-0 246 -0 0

Si li c on , CD12 676 or F D3 375

CR2 3 1

152-0 24 6-0 0

Si li c on , CD1 267 6 or F D3 375

CR2 32

152-0 24 6-0 0

Sil ic o n, CD12 676 or FD 33 75

CR23 3 152- 024 6- 00

Sil ic on , CD1 26 76 or FD 337 5

CR25 0A

152- 03 27- 00

50 V , 75 mA, BAX 1 3

CR2 50 B

152- 032 7- 00

50 V, 75 mA , BAX 13

CR2 7 4 152-0 32 7-0 0

50 V, 75 mA, BAX 1 3

CR2 7 5

152-0 32 7-0 0

50 V , 7 5 mA , BAX 13

CR 27 6

152- 032 7-0 0

50 V , 75 mA, BAX 1 3

CR 27 7 152- 03 27- 00

50 V , 75 mA , BAX 13

E

6-6

Electrical Parts List—326 (SN 300500-up)

ELECTRICAL PARTS LIST (conts)

Ckt. No

Tektronix Serial/Model No.

Part No. Eff Disc

Description

DIODES (cont)

CR 2 7 9 CR 28 0 CR2 8 1 CR 28 2 CR 28 3 CR2 8 4

CR5 4 2

CR 54 3

CR6 1 1 CR6 1 2

152-03 27- 00 152- 0071 -00 152-0 07 1-0 0 152- 0327 -00

152-00 71- 00

152-0 07 1-0 0

152- 0246 -00

152- 02 46- 00 152-0 32 7-0 0 152-0 32 7-0 0

50 V , 75 mA , BAX 13 Ger ma niu m, ED -2 00 7 Germ ani um , E D- 20 0 7 50 V , 75 m A, BA X 13 Ger ma niu m, ED-20 0 7 Ger ma ni um , ED-20 0 7

CR 28 6

152- 032 7-0 0

50

V, 75

mA , BAX

1 3

CR3 1 0

152- 014 1-0 2

30 05 00 30065 5 Silic o n,

1N 41 52

CR 31 0

152- 032 7-00

300 65 6

50 V, 75 mA, BA X

1 3

CR31 1

152- 014 1-0 2

30 05 0 0

30 06 55

Sil ic o n,

1N 41 52

CR3 11

152- 032 7-0 0 3006 56

50

V, 75 mA , BAX

1 3

CR3 1 2

152- 014 1-0 2

300 50 0

300 6 55

Si li co n ,

1N 41 52

CR 31 2

152-0 32 7-0 0

30 06 5 6 5 0

V , 7 5 mA , BAX

1 3

CR 31 3

152- 014 1- 02

30 05 00

300 6 5 5

Sil ic o n,

1N4 15 2

CR 31 3 152-032 7-0 0

30 06 56 50

V , 75

mA , BAX

13

CR 31 5

152-0 14 1-0 2 30 0 50 0

30 06 55

Sil i co n ,

1N4 15 2

CR3 1 5 152 -0 327 -0 0

30 06 5 6

50 V , 7 5 m A , BAX

1 3

CR3 1 6

152- 0141 -02

30 05 00 30065 5

Sil ic o n,

1N4 15 2

CR 31 6

152- 0327 -00

30 06 56

50

V, 7 5

mA , BAX

13

CR 31 7

152- 014 1-0 2

30 05 0 0 30 0 65 5

Si li co n ,

1N 41 5 2

CR3 1 7

152- 032 7-0 0

30 06 5 6 50

V, 7 5

mA , BAX

1 3

CR3 1 8

152- 014 1- 02

30 05 00

30 06 55 Sili c on ,

1N4 15 2

CR3 18

152- 032 7-0 0

30 06 5 6

50 V , 75

mA , BAX

1 3

CR3 31

152- 032 7-0 0

50

V , 7 5 mA , BAX

1 3

CR 33 5

152-0 32 7-0 0

50

V , 75 m A, BA X

1 3

CR3 41

152- 032 7-0 0

50

V , 7 5

mA , BAX

1 3

CR 34 5

152-0 32 7-0 0

50 V , 75

mA , BAX

13

CR40 0A

152- 032 7- 00

50

V , 75

mA , BA X

13

CR4 00 B

152-0 327 -00

50

V , 75 mA, BAX

13

CR4 00 C

152- 032 7-0 0

50

V, 7 5 mA, BAX

1 3

CR 44 0 152-032 7-0 0

50

V, 75 mA, BAX

1 3

CR4 4 2

152- 0327 -00

50

V, 7 5 mA, BAX

1 3 Sil ic on , CD 12 6 76 or FD3 3 75 Sil ic on , CD 12 6 76 or FD3 37 5 50 V , 75 mA , BAX 13 50 V, 75 mA , BAX 13

CR 61 3

152-0 32 7-0 0 CR6 14 152 -032 7-0 0 CR6 1 6

152- 032 7- 00 CR 62 0

152-0 24 9-0 0 CR6 26 152-03 27- 00 CR6 28

152-0 32 7-0 0 CR636A

152-0 32 7-0 0 CR 63 6B

152- 032 7- 00 CR 64 0

152- 032 7- 00 CR6 6 3

152-0 32 7-0 0 CR 6 67

152-0 32 7-0 0 CR6 68 152-0 327 -00

50

V,

7 5

mA ,

BAX

1 3

5 0

V,

7 5

mA ,

BAX

1 3

50

V,

7 5 mA , BAX 13

Sil ic o n,

CD6 11 6 5

an d CD1 26 7 6

50

V,

7 5

mA , BAX

1 3

5 0

V,

7 5

mA ,

BAX

1 3

50

V,

7 5 mA ,

BAX

13

50

V,

7 5

mA ,

BAX

1 3

50

V,

7 5

mA ,

BAX

13

50

V,

7 5

mA ,

BAX

1 3

50

V,

7 5

mA , BAX

1 3

50

V,

7 5

mA ,

BAX

1 3

RE V . B OC T . 197 4

6-7

Electrical Parts List—326 (SN 300500-up)

ELECTRICAL PARTS LIST (cont)

Ckt Grid No. Loc

Tektronix

Part No.

Serial/Model No. Eff Disc

DIODE S (c o n t )

CR6 7 0

152- 03 27 -0 0

CR6 72

152- 03 27 -0 0

CR7 28 152 -0 32 7- 00

CR73 8

152- 03 27 -0 0

CR741

152- 03 27 -0 0

/

CR8 7 0

152- 01 07 -0 0

CR8 8 0 • ,

152 -05 16 -00

300 50 0 30085 1

CR8 80 152- 04 60 -0 0

300 8 5 2

CR8 81

152 -0 327 -0 0

CR886 A

152- 03 27 -0 0

CR88 6B

152- 03 27 -0 0

CR8 86 C

152- 03 27 -0 0

CR8 86D

152- 03 27 -0 0

X3013 00

CR890

152 -0 327 -0 0

CR8 9 2

152 -0 327 -0 0

CR89 4

152 -0 32 7- 00 CR89 6 152- 03 27 -0 0 CR9 2 2

152- 03 27 -0 0 CR 92 9

152- 03 33 -0 0 CR9 30

152 -0 32 7- 00 CR931

152- 03 33 -0 0 CR9 3 2 152-0 32 7- 00

'

CR9 33

152- 03 27 -0 0

CR9 3 4

152- 03 27 -0 0 CR9 4 0 152-00 61 -0 0 CR9 48

152 -0 327 -0 0 CR9 58

152 -0 327 -0 0 CR 95 9

152 -0 52 2- 00 CR9 60

152 -0 55 2- 00 CR9 6 2

152 -0 32 7- 00

CR9 6 4

152 -0 32 7- 00 CR966 152- 01 85 -0 0

CR9 7 2 152-0 32 7- 00

CR9 7 6 152-00 61 -0 0

CR99 0

152 -0 24 2- 00

CR9 9 2 152-0 06 1- 00

CR994

152 -0 33 3- 00

CR 99 5

152- 05 16 -0 0

30 05 00 30085 1

CR 99 5

152 -0 46 0- 00

300 8 51

CR10 00

152 -05 22 -00 CR100 4

152 -0 327 -0 0

CR1 01 5

152- 05 22 -0 0

CR10 26

152 -03 27 -00

CR1040 A-G 152-0 33 1- 00

CR1 10 5

152- 01 07 -0 0

CR11 10 A,B ,C

, D 152 -0 44 7-0 0

CR1 13 7

152 -00 08 -00

CR1 13 8

152- 00 08 -0 0

DELAY LINE

DL415 119-03 81 -00

BULB

DS878 150-008 4-0 0

_______________

Description

____________

50 V , 75 m A, BAX 13 50 V , 7 5 mA , BAX 13 50 V , 75 m A , BAX 13 50 V , 7 5 mA , BAX 13 50 V , 75 mA , BAX 13 Sil ic o n, T160 or 1N6 47 Si li c on , 1N 52 97 Sil ic o n, 1N 52 97 50 V , 75 mA, BA X 13 50 V , 7 5 mA , BAX 13 50 V , 7 5 mA , BAX 13 50 V, 75 m A, BAX 13 50 V , 75 m A, BAX 13 50 V , 7 5 mA , BAX 13 50 V , 75 mA , BAX 1 3 50 V , 7 5 m A , BAX 13

50 V , 7 5 mA , BAX 1 3 50 V , 75 m A, BAX 13 Si li c on , FD H 60 12 50 V , 7 5 mA , BAX 13 Si li c on , FD H601 2 50 V, 75 mA , BAX 13

50 V , 7 5 mA , BAX 13 50 V , 75 mA, BAX 13 Si li c on , CD83 9 3 o f FDH21 61 50 V , 7 5 m A, BAX 13 50 V , 75 mA, BAX 1 3 Sil ic o n, 1S1 30 5 Si li c on , IS1 30 5 50 V , 75 mA , BAX 13 50 V , 75 mA , BAX 13 Si li c on , sim il ar to 1N41 52 50 V , 75 m Aj BAX 1 3

Sil ic o n, CD83 9 3 o r FDH21 61 Sil ic o n, 1N486 A or CD1269 1 Sil ic o n, CD83 93 or FDG21 61 Sil ic o n, FD H60 12 Sil ic o n, 1N5 29 7 Sil ic o n, 1N5 29 7 Sil ic on 1S130 5 50 V, 75 m A, BAX 13 Si li c on , 1S 13 0 5 50 V, 75 m A , BAX 1 3 Rec ti fi er , 1. 5 kV , 2 5 mA , f as t recovery Si li c on , T160 or 1N6 47 Si li c on , 10 D 2 Ger ma niu m, T1 2G Ger ma niu m, T12 G

Delay line assem bly

Neon, 2 AA

6-8

RE V. C O C T. 197 4

Electrical Parts List—326 (SN 300500-up)

ELECTRICAL PARTS LIST (cont)

Ckt. No.

Tektronix

Part No.

Serial/Model No. Eff Disc

Description

FUS E S

F8 7 0

159- 00 98- 00

1. 6 A, fast-b lo

F11 01

159- 00 97 -0 0

0.4 A , fa st -bl o

FI 101

159- 01 00 -0 0

0. 2 A , fa st -b l o

IND UC TO RS

L41 6

276- 054 3- 00

30 05 00

30 12 99

Co r e , fer ri te

L4 1 6

276- 054 3-0 2

30 13 0 0

Co r e , f er r i te . Ins ulat ed

L42 6

276-0 54 3-0 0

30 50 00

30 12 9 9

Co r e , fe rr it e

L4 2 6

276-05 43- 02

30 13 0 0

Co r e , fer r i te . Insul ate d

L45 7

276 -05 43 -00

30 05 00

301 2 9 9

Co r e , fer ri te

L4 57

276- 05 43- 02

301 3 0 0

Co r e , fe r ri t e. In sulat ed

L4 80

108- 05 87 -0 0

5. 6 mH

L61 2 108-06 92 -00

270 yH

L8 60

108- 04 88 -0 0

15 0 yH

L87 0

108- 04 64 -0 0

12 5 yH

L94 3

108- 06 94- 00

19 yH

L99 0

108 -0 58 7- 00

5. 6 mH

L994

108- 06 92 -0 0

270 yH

L101 4

108 -0 46 3- 00

35 yH

L10 32 108-0 46 3- 00

35 yH

L1053A

276 -0 638 -0 0

Co r e , fe r ri te

L105 5B

276 -0 638 -0 0

Co r e , fer ri te

L10 6 0

108 -0 67 1- 00

Trace r ot ati on

TRAN SIS TOR S

Q1

151 -0 190 -0 2

Si li c on , NPN, 2N3904

Q 9

151-0 19 0-0 2

Sil ic o n, NPN, 2N3904

Q31A ,B 151-1 010 -0 0

Si le i on , FE T , SU2115 or D /2N 38 22 , dua l

Q41 A, B

151- 02 32- 00

Sil ic o n, NPN, 2N29 1 9, dual

Q51

151-0 22 1-0 2

Sil ic o n, PNP , 2N4258

Q52

151- 022 1- 02

Sil ic o n, PNP , 2N4258

Q5 3

151 -01 90 -02

Sil ic o n, NPN , 2N3904

Q55

151 -02 21 -02

Sil ic on , PNP , 2N4258

Q5 7

151- 02 21 -0 2

Sil i co n, P N P, 2N4258

Q5 9

151- 01 90 -0 2

Sil ic on , NP N , 2N3 904

Q61 151- 01 90 -0 2

Sil i co n, NPN , 2N3 904

Q7 1

151- 01 90- 02

Sil ic on , NP N, 2N3904

Q81 151- 02 21 -0 2

Sil ic on , PNP , 2N4258

Q8 9

151 -02 21 -02

Sil ic o n, P N P, 2N4258

Q9 1

151- 01 90 -0 2

Si li c on , NPN , 2N3 904

Q9 5

151- 01 90 -0 2

Sil i co n, NPN , 2N3 904

Q98 151- 01 90- 02

Sil ic on , NPN , 2N 390 4

Q9 9

151 -01 90 -02

Sil ic on , NPN , 2N 390 4

Q231 A,B

151- 10 10- 00

Sil ic o n, F E T , SD- 211 5 or D/2 N3 8 22 , dual

Q241 A,B

151 -0 232 -0 0

Sil ic o n, NPN, 2N29 1 9, dua l

Q251 151- 022 1- 02

Sil ic o n, P N P, 2N4258

Q25 2

151- 022 1- 02

Si li c on , PNP, 2N 4 25 8

Q25 3

151 -0 190 -0 2

Sil ic on , NPN , 2N3904

Q25 5 151-022 1- 02

Sil ic o n, P NP , 2N4258

Q25 7

151- 02 21- 02

Sil ic on , PNP , 2N425 8

Q25 9 15 1-0 19 0-0 2

Si li c on , NP N , 2N3904

Q261

151- 01 90 -0 2

Sil ic o n, NPN, 2N3904

Q271

151- 019 0- 02

Si li c on , NP N , 2N3904

Q28 1

151 -02 21 -02

Sil ic o n, P N P, 2N4258

Q28 9

151-02 2 ,1- 0 2

Si li c on , PNP, 2N4258

RE V . B OC T . 197 4

6-9

Electrical Parts List—326 (SN 300500-up)

ELECTRICAL PARTS LIST (cont)

Ckt. No,

Tektronix Serial/Model No.

Part No. Eff Disc Description

TRAN SIS TO RS

(con t)

Q29 1

151 -01 90 -02 Q2 9 9 151 -0 190 -0 2 Q3 33

151- 02 20- 00 Q34 3

151- 02 20- 00 Q35 1

151- 01 90 -0 2

Q35 5

151 -02 20 -00 Q361

151- 01 90- 02 Q37 6 •

151- 02 20- 00 Q3 8 6

151- 02 20- 00 Q39 2

151-0 19 0-0 2 Q4 10

151- 01 90- 02

Q41 5

151- 02 16- 00

30 05 00

Q41 5

151- 022 0- 00 301 30 0

Q41 6

151- 03 67- 00

Q42 0

151- 0^ 90- 02

Q42 5

151- 02 16- 00 300 50 0

Q42 5

151- 02 20 -0 0

301 3 0 0

Q42 6

151- 03 67- 00

Q43 2

151- 037 5- 00

Q43 4

151- 03 75 -0 0

Q448

151- 03 75 -0 0

Q45 2

151- 021 9- 00

Q454

151 -0 376 -0 0

Q45 7

151- 023 4- 00 3005 0 0

Q45 7

151- 04 89- 00

301 78 5

Q45 8

151-0 23 4-0 0 3005 0 0

Q45 8

151- 04 89 -0 0

301 78 5

Q46 2

151 -0 23 4- 00 3005 0 0

Q46 2

151- 04 89 -0 0

301 78 5

Q46 4

151- 02 14- 00

Q47 2

151- 02 34- 00

300 5 0 0

Q47 2

151 -04 89 -00 301 78 5

Q4 74

151- 02 14 -0 0

Q50 5

151- 022 0- 00

Q5 10

151- 01 90- 02

Q54 5

151-1 01 8-0 0

Q5 52

151- 03 76- 00

Q55 6

151- 037 6- 00

Q57 0

153 -06 05 -00 Q58 0 15 1-0 36 7-0 0 Q611 15 1- 019 0- 02 Q61 5

151- 019 0-0 2 Q63 0

151 -03 67 -00 Q63 6 151- 03 67 -00 Q63 8 151 -03 67 -00 Q64 0 151 -10 18 -00 Q65 2

151 -03 76 -00 Q65 5 151 -02 20 -00 Q65 8

151- 01 90- 02

Q66 1

151- 01 90 -0 2 Q66 4 151- 019 0- 02 Q67 2

151- 02 20- 00

Q68 2

151-0 23 4-0 0 3005 0 0

Q68 2

151- 04 89- 00 301 78 5

Q69 0 151-0 23 4- 00

300 5 0 0 Q69 0 151-0 48 9-0 0 30178 5 Q69 2

151- 02 14- 00

Sil ic on ,

NP N ,

2N39 04 Sil i co n , NPN , 2N39 04 Si li co n ,

PN P ,

2N4 12 2 Si li c on ,

PNP, 2N41 22

Sil ic o n, NP N ,

2N3 90 4 Si li c on , PNP , 2N412 2 Sil ic o n, NPN ,

2N3 904 Si l ic o n,

PN P, 2N4 12 2

Sil ic o n, PN P ,

2N4 12 2 Si li c on , NPN ,

2N3 904

Sil ic o n,

NP N ,

2N39 04

301 2 9 9 Sili co n ,

PN P ,

MPS65 23

Sil ic o n, PN P ,

2N4 12 2

Sil i c on ,

NP N, SKA6 5 16

Si li c o n, NP N,

2N3 90 4

30 12 9 9

Sil ic o n, PN P ,

MPS6 52 3

Si li c on ,

PN P ,

2N4 12 2 Sil ic o n, NP N, SKA651 6 Sil ic on ,

NP N , 2SC403 C Sil i co n , NPN , 2SC40 3C Si li c on ,

NP N ,

2SC4 03 C

Sil ic o n,

PN P ,

2N4 25 0

Si li co n , NPN , 2SC402 C

301 78 4 Sil ic o n,

NP N, 2SC 80 5 Si l ic o n,

NP N, 2SC163 0

301 7 84 Sili c on ,

NP N,

2S C8 05

Si li co n , NPN , 2SC16 30

301 78 4 Sil ic o n, NPN ,

2SC 80 5

Si li c on ,

NP N , 2SC16 30

Si l ic o n, PNP ,

2N3 4 95

3017 84

Si li co n ,

PN P , 2SC80 5

Sil i co n ,

NP N , 2SC16 30

Sil i co n ,

PN P , 2N34 95

Sil i co n ,

PN P ,

2N4 122

Si li co n ,

NP N ,

2N3 904

Si li c o n,

FE T , N ch an nel

Sil i co n ,

NP N , 2SG-40 2C

Si li c on ,

NP N, 2SG-402C Sil i co n, NPN , SKA6516, Sil i c on , NPN ,

SKA 65 16

Si li c on ,

NP N ,

2N39 04

Si l ic o n,

NP N ,

2N3 904

Si li c on ,

NP N , SKA6 516 Sil ic o n,

NP N , SKA65 1 6 Si li co n ,

NP N ,

SKA 65 16

Sil ic o n,

FE T ,

N chan ne l

Si li c on ,

NP N ,

2SC- 40 2C

Sil ic o n,

PN P ,

2N4 122

Si l ic o n, NP N,

2N3 90 4

Si li c on ,

NP N ,

2N39 04

Sil i c on ,

NP N,

2N3 90 4

Si li co n ,

PN P ,

2N4 12 2

301 78 4 Sili c o n,

NP N, 2SC 80 5 Si l ic o n,

NP N , 2SC1 630

301 78 4 Sili c on ,

NP N, 2SC 8 05 Sil i co n ,

NP N, 2SC163 0 Sil i co n ,

PN P,

2N3 49 5

, 2SK-12R

che ck ed

, 2SK-12 R

6-10

RE V . C OC T . 197 4

Electrical Parts List—326 (SN 300500-up)

ELECTRICAL PARTS LIST (cont)

Tektronix Serial/Model No.

Ckt. No.

Part No.

Eff

Disc Description

TRAN SIS TO RS (c o n t)

Q7 2 6

151- 022 0-00

Sil ic on , PNP , 2N4122

Q73 2

151-01 90- 02

Sil ic o n, N PN , 2N3904

Q73 8

151- 022 0- 00

Sil ic o n, P N P, 2N4122

Q74 0

151- 022 0- 00

Si li c on , P N P, 2N4122

Q74 1 151- 01 90- 02

Sili co n, NPN , 2N 390 4

Q74 4

151-0 376 -00

Sil ic on , NPN , 2S C-4 02C

Q74 6

151-0 376- 00

Sil ic o n, N PN , 2SC-402C

Q74 8

151- 04 03- 00

Sil ic on , NPN , 2SC1012A

Q7 56

151-0 22 0-0 0

Sil ic o n, P N P, 2N412 2

Q75 8

151-0 22 8-0 0

Sil ic on , PNP , selecte d from 2N 488 8

Q77 0

151-0 220 -00

Sil ic o n, P NP , 2N412 2

Q7 72

151-0 228 -00

Sil ic on , PNP , selected fro m 2N4 888

Q78 6

151- 022 0-0 0

Si li c on , P NP , 2N412 2

Q788

151- 0403 -00

Sil ic on , NPN , 2SC01012A

Q878

151-0 17 9-0 0

Sili co n, NPN , 2N387 7A

Q88 2

151- 030 6- 00

Sil ic o n, NPN, 2SC7 56

Q88 4

151- 03 06- 00

Si li c on , NP N , 2SC7 5 6 "

Q88 7 151-01 90 -02

Sil ic on , NPN , 2N3904

Q8 88

151-0 190 -02

Sil i co n, NPN, 2N390 4

Q89 0 151- 019 0-02

Sili co n, NP N , 2N3 90 4

Q892

151-0 190 -02

Sil ic on , NPN , 2N 39 04

Q91 7 151- 022 0- 00

Sil ic on , PNP , 2N4122

Q918

151-0 30 6-0 0

Si li c on , NPN, 2 SC 7 56

Q92 8

151- 030 6- 00 Sil ic on , NPN , 2SC756

Q93 0

151-0 30 6-0 0

Sil ic o n, NPN, 2SC75 6

Q94 2

151-0 51 6-0 0

Sil ic on , unij u nc ti on , D1 3T1

Q94 8

151- 030 6- 00 Sil ic on , NP N , 2SC756

Q97 6

151-0 231- 00

30 05 00 30 10 4 5

Sil ic o n, NPN, 2SC756 -3

Q97 6

151-02 31-0 1

301 0 4 6

301 46 2

Sil ic on , NPN , 2 SC 75 6 -3 , sel ecte d

Q97 6

151-0 23 1-0 0

301 46 3 Sil ic on , NPN , 2SC756

Q97 8

151- 023 1- 00

300 5 00 30 10 4 5 Sili co n, NPN, 2SC75 6

Q97 8

151-023 1-0 1

301 0 4 6 3014 62

Sil ic o n, N P N, 2SC74 6 -3 , selected

Q97 8

151- 02 31- 00

301 46 3

Sil ic o n, NPN , 2SC75 6

Q1008

151- 019 0-0 2

Sil ic o n, N P N, 2N3904

Q10 10

151-0 190 -02 Si li co n, NPN , 2N 390 4

Q101 2

151- 0164 -00

Sil ic o n, P N P , 2N 54 47 or 2N 37 02

Q101 8

151 -02 20 -00

Sil ic on , PNP , 2N4122

Q102 2

151- 019 0- 02

Sil i co n, NPN, 2N3904

Q1024

151 -0 207 -0 0

Si li c on , NPN, 2N341 5

Q111 7 151-03 74 -0 0

Sil i co n, NPN , 2SD 31 6

Q112 0

151-0 21 9-0 0

Sil ic on , PNP , 2N 4 25 0

Q1121

151- 02 24- 00

Sil ic on , NPN , 2N 36 92

Q11 34

151 -02 19 -00

Sil ic o n, N P N, 2N425 0

Q11 36

151-0 21 9-0 0

Sili co n, PNP , 2N 42 50

RESIS TO RS

R1

315-0 100 -01

10 0 , 1/ 4 W , 5%

R2

315-0 100 -01

10 JJ, 1/4 W , 5%

R3

315-01 02- 01

1 kO , 1 /4 W , 5%

R4 315-0752-0 1

7. 5 kfl, 1/4 W , 5%

R6

315-0 331 -01

330 0, 1/4 W , 5 %

R8

315-0 10 3-0 2

10 kfl, 1/ 4 W , 5 %

R 9 315-08 22- 01

8.2 kfl , 1/4 W , 5%

R12

321- 031 6-3 0

19. 1 kfl , 1/8 W, 1%

R1 3

321 -03 18 -30

20 kft, 1/8 W , 1 %

R1 5

321- 03 36 -3 0

30. 9 kf l, 1/ 8 W , 1%

R1 7

321- 075 3-3 1

9 kf l, 1/8 W , 1/2 %

R1 8

321-07 54- 31

90 0 fl, 1/8 W , 1/2 %

RE V . C OCT. 1974

6-11

Electrical Parts List—326 (SN 300500-up)

ELECTRICAL PARTS LIST (cont)

Ckt. No.

lo.

Tektronix Serial/Model No.

Part No. Eff Disc

Description

tn

Csl

o

1—

oo

1—1

tn

(cont)

R1 9

321-06 36- 00

10 0 fi, 1/8 W , 1/2 %

R2 0 315-0 474- 01

47 0 kfi, 1/4 W , 5%

R2 1

315-04 70- 02

47 8 , 1/4 W, 5 %

R2 3 B

322-06 21-3 1

90 0 k 8 , 1/4 W , 1/2 %

R23 C 321-1389-31

111 k8 , 1/ 8 W, 1/2 %

R2 4B

322-0624 -01

99 0 kfi, 1/4 W, 1/2 %

R24C '

321-128 9-3 1

10. 1 kf i, 1/8 W , 1/ 2 %

R2 5B

322-0 625- 01

99 5 k8 , 1/ 4 W, 1/ 2%

R25 C

321-06 13- 31

5.0 3 kfi, 1/8 W , 1/ 2 %

R2 7B 322-0610-3 1

500 kfi, 1/ 4 W , 1 /2 %

R27 C

322-04 81-0 1

1 Mf i, 1/4 W , 1/2 %

R27 D

315-03 33- 01

33 kfi , 1/4 W , 5 %

R2 8B

322-0 620 -31

80 0 kf i, 1/4 W , 1 /2 %

R28 C

321- 0618 -31

25 0 kfi , 1/8 W , 1/2%

R2 9

322-04 81-0 1

1 Mfi , 1/4 W , 1/2 %

R3 0

321-03 85- 31

10 0 kf i, 1/8 W , 1 /2 %

R3 1

315-02 01- 01

20 0 fi, 1/4 W, 5 %

R3 2 321-0 068 -30

49 . 9 fi, 1/8 W , 1 %

R3 3

321- 024 9-30

3.8 3 kfi, 1/ 8 W , 1%

R3 5

321- 024 9-3 0

3.8 3 kfi , 1/8 W , 1%

R3 6 311-06 22-0 0

10 0 fi, Var

R3 7

311- 063 4-00

50 0 fi, Var

R3 8

321- 0213 -30

1. 62 kfi, 1/8 W , 1 %

R4 0

321- 021 0-30

1. 5 kf i, 1/8 W , 1 %

R41

311- 0643 -00

50 fi, Var

R4 2 321-010 3-3 0

11 5 fi, 1/8 W , 1 %

R4 4

321-0 213 -30

1.6 2 kf i, 1/8 W , 1 %

R4 6 321-026 5-3 0

5.6 2 kf i, 1/8 W , 1 %

R4 7

315-010 1-0 1

10 0 fi, 1/4 W , 5 %

R4 8

321- 022 3-3 0

2.0 5 kf i, 1/8 W , 1 %

R5 0

321- 0217 -30

1.7 8 kf i, 1/8 W , 1%

R5 1

315-010 1-0 1

10 0 fi, 1/ 4 W , 5 %

R5 2 321-026 5-3 0

5.6 2 kf i, 1/8 W , 1 %

R5 3

321- 0181 -30

75 0 fi, 1/8 W , 1%

R5 4

321-02 23- 30

2.0 5 kf i, 1/8 W , 1 %

R5 5

315-010 1-0 1

10 0 fi, 1/4 W , 5 %

R5 7

321-0 277 -30

7. 5 kf i, 1/8 W , 1 %

R59

321-0 27 7-3 0

7. 5 kfi,' 1 / 8 W , 1 %

R6 0

315-01 01-0 1

10 0 fi, 1/4 W , 5%

R6 1 321-022 3-3 0

2. 05 kf i, 1/.8 W, 1 %

R6 3

321- 0260 -30

4.9 9 kf i, 1/8 W , 1 %

R6 4

321-01 57- 30

300 50 0 301 29 9

422 fi, 1/8 W , 1%

R6 4

321-01 61- 30 30 1 30 0 464 fi, 1/8 W, 1%

R6 5

311-0 605 -00

20 0 fi, Var

R6 6

311-13 29-0 1

3 kfi , Var

R6 8

321-0 23 1-3 0

2. 4 9 kfi , 1/8 W , 1 %

R6 9

311- 063 4-0 0

500 fi, Var

R71

321-0 231 -30

2. 4 9 kfi , 1/8 W , 1%

R7 2 321-0260 -30

4. 99 kfi , 1/8 W , 1 %

R7 4

315-0243 -01

24 kfi , 1/4 W , 5%

R7 5

311-068 9-01

2 x 10 kf i, Var

R7 6

315-024 3-01

24 kfi, 1/ 4 W , 5%

6-12

RE V . B OC T . 1974

Electrical Parts List—326 (SN 300500-up)

ELECTRICAL PARTS LIST

No.

Tektronix Serial/Model

Part No. Eff

RESISTORS (cont)

R7 7

321- 029 7- 30

R7 9

321- 02 97- 30 R8 1 321-026 4- 30 R8 2

311- 063 3- 00 R84 311-0 633 -0 0 R8 5

321- 026 4- 30 R8 7 315- 027 2- 02 R88

321- 025 1-3 0 R9 0

321- 0251 -30 R9 1

315- 027 2-0 2

R9 3

321- 01 93- 30

R9 4

315- 0471 -02 R9 5 315-027 2-0 2 R9 6

315- 075 1- 03

R9 7

315- 039 1-0 2

R98

315-0 20 3-0 1

R9 9

315-0 22 1-0 1 R10 0

321- 0193 -30

R10 2

315- 01 01- 01

R10 4 3 15- 010 1-0 1

R201

315- 010 0- 01

R202

315-0 10 0-0 1 R22 0

315- 047 4-0 1

R221

315-0 47 0-0 2

R22 3 B

322- 0621 -31

R223C

321-1 38 9-3 1

R22 4 B

322-062 4-0 1

R224 C

321- 128 9-3 1

R22 5B

322- 062 5-0 1

R225 C

321-06 13- 31

R22 7B

322- 0610 -31

R227C

322- 0481 -01

R227D

315-033 3-0 1

R22 8B

322-0 620- 31

R228C

321-0 61 8-3 1

R2 29

322 -0 481 -0 1

R23 0

321- 038 5-3 1

R23 1 3 15- 0201 -01 R23 2

321- 00 68- 30

R23 3 3 21- 024 9- 30 R23 5

321- 02 49- 30

R23 6

311-0 62 2-0 0

R23 7 311 -06 34- 00 R238

321- 021 3-3 0

R24 0 321 -02 10 -30 R241

311- 06 43- 00

R24 2

321- 010 3-3 0 •

R244

321- 021 3-3 0

R24 6 321- 026 5- 30 R24 7 315- 010 1-0 1 R248

321-0 22 3-3 0

(con t)

Description

12. 1 kf i, 1/ 8 W , 1%

12. 1 kf i, 1 /8 W, 1%

5.4 9 kf i, 1/ 8 W , 1% 5 kfi, Var 5 k fi, Var

5. 49 kfi, 1/ 8 W , 1%

2.7 kfi, 1/4 W , 5 %

4.0 2 kfi , 1/8 W , 1 %

4.0 2 kfi , 1/8 W , 1%

2. 7 kfi, 1/ 4 W , 5 %

1 kfi , 1/8 W , 1 % 47 0 fi, 1/4 W, 5 %

2. 7 kf i, 1/ 4 W , 5% 75 0 0 , 1/ 4 W , 5% 39 0 fi, 1/4 W , 5 % 20 kfi , 1/4 W , 5 % 22 0 fi, 1/4 W , 5 % 1 kfi, 1/8 W, 1% 10 0 fi, 1/4 W , 5 % 10 0 fi, 1/ 4 W , 5 %

10 fi, 1/4 W, 5% 10 fi, 1/ 4 W , 5% 47 0 kfi, 1/4 W , 5 % 47 fi, 1/ 4 W , 5% 90 0 kfi, 1/ 4 W , 1/ 2 % 111 kfi , 1/8 W , 1/ 2 % 99 0 kfi, 1/ 4 W , 1/ 2 %

10. 1 kf i, 1 /8 W , 1/ 2 % 99 5 kfi, 1/ 4 W , 1/ 2 %

5.0 3 kf i, 1/8 W , 1/ 2% 50 0 kfi , 1/4 W , 1/ 2 %

1 M B , 1/ 4 W , 1/ 2 % 33 kfi, 1/ 4 W , 5% 80 0 kfi, 1/4 W , 1/ 2 % 25 0 kf i, 1/ 8 W, 1/ 2 % 1 Mfi, 1/4 W , 1/ 2 % 10 0 kfi, 1/8 W , 1 /2 % 20 0 fi, 1/4 W , 5 % 49 .9 fi, 1/8 W , 1%

3. 83 kfi, 1/ 8 W , 1 %

3.8 3 kfi, 1/ 8 W , 1 %

100 fi, Var 50 0 fi, Var

1.62 kfi, 1/ 8 W , 1 %

1. 5 kfi, 1/8 W, 1 % 50 fi, Var 11 5 fi, 1/8 W , 1%

1.6 2 kfi , 1/8 W , 1 %

5.6 2 kfi , 1/8 W , 1% 10 0 fi, 1/ 4 W , 5%

2.0 5 kfi, 1/8 W , 1%

6-13

Electrical Parts List—326 (SN 300500-up)

ELECTRICAL PARTS LIST Ccont)

Tektronix Serial/Model No.

Ckt. No.

_________

Part No. Eff

__________

Disc

_____________________

Description

RESISTORS

Ccont)

R25 0

321- 021 7- 30

1 . 7 8 k£2, 1 / 8 w, 1%

B25 1

315- 01 01- 01

10 0 £2, 1/4 W , 5 %

R25 2

321 -02 65 -30

5.6 2 k£2, 1/ 8 W , 1 %

R25 3

321-0 18 1-3 0

75 0 £2, 1/8 W , 1 %

R25 4

321 -02 23 -30

2.0 5 k£2, 1/ 8 W , 1 %

R25 5

315- 01 01- 01

10 0 £2, 1/4 W , 5%

R2 57

321- 027 7- 30

7. 5 k£2, 1/8 W , 1%

R2 5 9

321-0 27 7-3 0

7. 5 k£2, 1/ 8 W , 1%

R26 0 315-0101 -01

100 £2, 1/4 W , 5%

R26 1 3 21 -02 23 -3 0

2. 05 k£2, 1/8 W, 1%

R263

321-0260-30

4.99 k £2, 1/8 W, 1%

R264

321-0157-30

300500 301299

422 £2, 1/8 W, 1%

R264

321-0161-30

301300

464 £2, 1 /8 W, 1%

R26 5

311- 060 5-0 0

20 0 £2, Var

R26 6

311 -13 29 -01

3 k£2 , Var

R26 8 321 -02 31 -30

2. 4 9 k£2 , 1/8 W , 1 %

R2 6 9

311 -0 634 -0 0

50 0 £2, Var

R27 1

321- 023 1- 30

2. 49 k£2, 1/ 8 W , 1%

R27 2

321- 02 60- 30

4.9 9 k £2 , 1/ 8 W, 1%

R27 4

315 -02 43 -01

24 k£2, 1/4 W , 5%

R2 75 311- 068 9-0 1

2 x 10 k£2 , Var

R27 6

315-0 24 3-0 1

24 k£2, 1/ 4 W , 5 %

R2 7 7

321- 02 97- 30

12.1 k£ 2, 1/8 W , 1 %

R2 79

321- 029 7- 30

12. 1 k£2, 1/8 W , 1%

R28 1

321- 026 4- 30

5.4 9 k £2 , 1/8 W, 1%

R28 2

311- 063 3- 00

5 k£2, V ar

R28 4

311- 06 33 -0 0

5 k£2 , Var

R28 5

321- 026 4- 30

5. 49 k£2, 1/8 W , 1 %

R28 7

315-0 27 2-0 2

2. 7 k £2 , 1/4 W , 5 %

R28 8 321-0 251 -3 0

4.0 2 k£2, 1/ 8 W , 1%

R29 0

321-0 25 1-3 0

4.0 2 k£2, 1/8 W , 1 %

R29 1

315-0 27 2-0 2

2. 7 k£2, 1/4 W , 5 %

R29 3

321- 019 3- 30

1 k£2, 1/ 8 W , 1%

R30 0

321- 019 3- 30

1 k£ 2, 1/8 W , 1%

R30 2 315-0 101 -01

10 0 £2, 1/ 4 W , 5 %

R30 4 315-010 1- 01

10 0 £2, 1/4 W , 5%

R33 0 315-0152 -01

1. 5 k£2, 1/ 4 W , 5%

R331

315-0 27 2-0 2

2. 7 k£ 2, 1/ 4 W , 5%

R33 2 315-022 2- 02

2. 2 k£2, 1/4 W , 5 %

R33 3

315- 022 2- 02

2. 2 k£2, 1/4 W , 5 %

R33 4

315- 039 1-0 2

39 0 £2, 1/ 4 W , 5%

R33 5

315-0 51 1-0 1

51 0 £2, 1/4 W, 5%

R34 0

315-0 152 -01

1. 5 k£2, 1/4 W , 5 %

R34 1

315- 027 2-0 2

2. 7 k£2, 1/4 W , 5%

R34 2

315- 022 2- 02

2. 2 k£2, 1/4 W , 5 %

R34 3

315- 022 2-0 2

2. 2 k £2 , 1/4 W , 5 %

R34 4

315- 039 1-0 2

39 0 £2, 1/4 W , 5%

R34 5

315- 051 1- 01

51 0 £2, 1/4 W , 5%

R3 50

315-0 201 -01

20 0 £2, 1/4 W , 5%

R351 315-0 22 2-0 2

2. 2 k£ 2, 1/ 4 W , 5%

R35 2

315- 010 2- 01

1 k£2 , 1/4 W , 5%

R35 5

315-0 10 1-0 1

10 0 £2, 1/4 W , 5%

6-14

REV. C OCT. 1974

ELECTRICAL PARTS LIST (cont)

Tektronix Serial/Model No.

Ckt. No. Part No. Eff Disc

RESI ST ORS (c o n t )

R3 6 0 R36 1

315- 010 4- 02

315- 012 2-0 1 R36 2 315-047 1- 02 R3 63 315-0473 -01

R37 0 32 1- 023 2- 30

R37 5 321-02 13- 30

R37 6 R3 77

315- 03 61- 02

321- 00 99 -3 0

R38 0 32 1- 02 32 -3 0 R38 5 321-02 13- 30 R38 6 315 -03 61 -02 R3 88 R3 90 R391 R3 92 R39 5 R39 7

321- 009 9- 30

315- 018 2- 02

315-0 62 1-0 1

315- 0512 -01

315 -04 71 -02

321- 016 7- 30

R4 0 0 321-0 223 -3 0 R40 2

321- 02 23- 30

R4 1 0 321- 00 97- 30

Electrical Parts List—326 (SN 300500-up)

Description

10 0 kfl , 1/4 W , 5%

1. 2 kfl, 1/4 W , 5% 470 0 , 1/ 4 W, 5% 47 kfl, 1/4 W , 5%

2.55 kfl, 1/ 8 W , 1%

1.6 2 kfl, 1/ 8 W , 1% 36 0 fl, 1/4 W , 5% 105 fl, 1/8 W , 1%

2.5 5 kfl, 1/ 8 W , 1%

1. 62 kfl , 1/8 W , 1% 36 0 fl, 1/4 W , 5% 105 fl, 1/8 W, 1%

1.8 kfl, 1/4 W , 5% 62 0 fl, 1/4 W , 5 %

5. 1 kfl , 1/4 W , 5% 470 fl, 1/4 W , 5 % 53 6 fl, 1/8 W , 1 %

2.0 5 kfl, 1/ 8 W , 1%

2.0 5 kfl, 1/8 W , 15

100 fl, 1/8 W, 1%

R411 R41 2 R41 2 R41 3 R414 R41 5

311- 06 35 -0 0

321 -0 229 -3 0 3005 00 321-0 23 1-3 0 312 -03 34 -30 321 -02 69 -30

315- 0102 -01

R416A 32^- 02 61 -3 0 R41 6B R416C R41 7

315-0 240 -01 315-0 100 -01 321- 02 33- 30

R418 311-0 60 9- 00 R4 1 9 R42 0

315-0 10 0-0 1 321- 00 97- 30

R42 1 311 -0 63 5- 00 R42 2 32 1-0 22 9-3 0 R42 2 R42 4

R42 5 R426A R42 6B R426C R42 7

R42 8

R4 2 9 R432 R43 4 R43 6

321- 023 1- 30 30 13 00 321 -0 269 -3 0

315- 0102 -01 321- 02 61- 30 315- 024 0-0 1 315-0 100 -01 321- 02 33- 30 311- 06 09 -0 0 315- 010 0-0 1 315 -05 61 -02 315- 05 61- 02

321 -02 53 -30 R438 321-0 253 -3 0 R44 0 R44 2 R44 4 R44 6 R448

315- 027 2- 02

315- 0101 -01

315- 0113 -01

315- 0202 -01

315- 039 0- 02

301 30 0

300 5 00

1 kfl, Var

301299 2.37 kfl, 1/8 W, 1%

2.49 kfl, 1/8 W, 1%

29.4 kfl, 1/8 W, 1%

6.19 kfl, 1/8 W, 1% 1 kfl, 1 /4 W, 5%

5.11 kfl, 1/8 W, 1% 24 fl, 1/4 W, 5% 10 fl, 1/4 W, 5%

2.61 kfl, 1/8 W, 1% 2 kfl, Var 10 fl, 1/4 W, 5%

1 0 0 fl, 1/ 8 W, 1%

1 kfl, Var

301299 2.37 kfl, 1/8 W, 1%

2.49 kfl, 1/8 W, 1%

6.19 kfl, 1/8 W, 1%

1 kfl, 1/4 W, 5%

5.11 kfl, 1/8 W, 1% 24 fl, 1/4 W, 5%

10 fl, 1/4 W, 5%

2.61 kfl, 1/8 W, 1% 2 kfl, Var

10 fl, 1/4 W, 5% 560 fl, 1/4 W, 5%

560 fl, 1/4 W, 5%

4.22 kfl, 1/8 W, 1%

2.7 kfl, 1/4 W, 5% 100 fl, 1/4 W, 5% 11 kfl, 1/4 W, 5% 2 kfl, 1/4 W, 5% 39 fl, 1/4 W, 5%

RE V . B OC T . 19 74

6-15

Electrical Parts List—326 (SN 300500-up)

Tektronix Serial/Model No.

Ckt. No.

Part No. Eff

RESI ST ORS (c o n t )

R4 4 9 R4 50 R45 2 R45 4 R4 56 R45 7 R45 8 R459A R45 9B R4 6 0 R46 2 R46 4 R47 0 R4 72 R47 4 R47 6 R47 8

315- 039 2- 01 315- 082 2- 01 315- 030 2- 01 321- 01 13 -3 0 321- 02 33 -3 0 321 -0 11 3- 30 321- 01 13 -3 0 315-0 10 1-0 1 315- 010 1-0 1 321 -0 40 1- 30 315-0 62 1-0 1 315- 056 2- 01 321 -04 01 -30 315- 062 1- 01 315- 05 62- 01 315- 010 0- 01

315- 01 00- 01 R48 0 315 -01 01- 01 R50 2 R50 3

315-0 51 1-0 1

315-0 51 1-0 1 R504A 315-0 511 -0 1 R50 4B R50 5

315-0 51 2-0 1

315- 08 21 -0 2 R50 6 315 -02 02- 01 30 0 50 0 R50 6 315- 056 2-0 1 R50 7 R508

315- 020 2- 01

315 -07 51 -03 R51 0 315-0 101 -01 R511 R53 5 R53 6 R538

315- 047 2- 01

315 -0 471 -0 2

322- 06 21 -3 0

321- 06 17 -3 0 R54 0 322- 04 81 -0 0 R542 31 5- 010 4- 02 R54 5

315- 03 32 -0 2 R54 6 311- 06 44 -0 0 R55 0 315- 047 2-0 1 R55 2

321 -0 23 7- 30 R55 3 315-0 16 1-0 1 R554 R5 56

321- 02 29 -3 0

321 -0 23 7- 00 R55 7 315-01 61- 01 R55 8 R56 0

315- 047 2-0 1

315-0 13 3-0 1 R56 0 315- 047 2- 01 R56 2 R56 4

311- 06 87 -0 0

321- 02 97 -3 0 R56 6 321-0 26 9- 30 R568 32 1- 033 3- 30 R570 32 1- 01 77 -3 0 R57 2

321- 02 97 -3 0 R574 321 -0 25 7- 30 R57 6 321- 02 85- 30 R578

321- 02 17 -3 0 R58 0 321- 019 3- 30 R58 2

312- 02 89 -3 0 R59 0 315-01 00- 01 R59 5

315- 01 00- 01

ELECTRICAL PARTS LIST (cont)

___________

Disc_____

301299 2 kfl, 1/4 W, 5%

30 13 00

300 5 00

301299 13 kfl, 1/4 W, 5%

301 3 00

_______________

3.9 k fl, 1/4 W, 5%

8.2 kfl, 1/4 W, 5%

3 kfl, 1/4 W, 5%

147 fl, 1/8 W, 1%

2.6 1 kfl, 1/8 W, 1% 147 0, 1/8 W, 1Z 147 0, 1/8 W, 1%

100 0, 1/4 W, 5%

100 fl, 1/4 W, 5%

147 kfl, 1/8 W, 1% 620 fl, 1 /4 W, 5%

5.6 kfl, 1/4 W, 5%

147 kfl, 1/8 W, 1%

620 fl, 1/4 W, 5%

5.6 kfl, 1/4 W, 5%

10 fl, 1/4 W, 5%

10 fl, 1/4 W, 5% 100 fl, 1/4 W, 5% 510 fl, 1/4 W, 5% 510 fl, 1/4 W, 5% 510 fl, 1 /4 W, 5%

5.1 kfl, 1/4 W, 5% 820 fl, 1/4 W, 5%

5.6 kfl, 1/4 W, 5% 2 kfl, 1/4 W, 5% 750 fl, 1 /4 W, 5%

100 fl, 1/4 W, 5%

4.7 kfl, 1/4 W, 5% 470 fl, 1 /4 W, 5% 900 kfl, 1/4 W, 1%

111 kfl, 1 /8 W, 1% 1 MS, 1/4 W, 1% 100 kfl, 1/4 W, 5%

3.3 kfl, 1/4 W, 5% 20 kfl, Var

4.7 kfl, 1/4 W, 5%

2.87 kfl, 1/8 W, 1%

160 fl, 1/4 W, 5%

2.37 kfl, 1/8 W, 1%

2.87 kfl, 1/8 W, 1%

160 fl, 1/4 W, 5%

4.7 kfl, 1/4 W, 5%

50 kfl, Var

' 12.1 kfl, 1/8 W, 1%

6.19 kfl, 1 /8 W, 1%

28.7 kfl, 1/8 W, 1%

681 fl, 1 /8 W, 1%

12.1 kfl, 1/8 W, 1%

4.64 kfl, 1/8 W, 1%

9.09 kfl, 1/8 W, 1%

1.78 kfl, 1/8 W, 1%

1 kfl, 1/8 W, 1%

10 kfl, 1/8 W, 1%

10 fl, 1/4 W, 5Z 10 fl, 1/4 W, 5Z

Description

6-16

RE V . B OC T . 1974

Electrical Parts List—326 (SN 300500-up)

Ckt. No.

ELECTRICAL PARTS

Tektronix Serial/Model No.

Part No. Eff Disc

RESISTORS (cont)

R61 1

311 - 06 09 -0 0

R611A

315 -0 10 3- 02

R61 1B

315 -0 222 -0 2

R61 2

315- 03 32 -0 2

R61 3

315 -0 10 4- 02

R61 4

315- 05 12 -0 1

R6 1 5

315- 03 33 -0 1

R61 6

315- 01 04 -0 2

R61 7

321 -0 27 7- 30

R61 8

311- 06 33 -0 0

R6 1 9

321- 02 55 -3 0

R620A

309- 00 95 -0 0

R62 0 B

309- 00 87 -0 0

R620C

322 -0 48 1- 01

R620D

322 -04 81 -01

R62 0 E

322- 06 10 -3 1

R620F

321- 04 14 -3 1

R620G

321- 03 85 -3 1

R620 H

321- 07 56 -3 1

R622 A.B

311-1 33 0-0 1

R62 4

315 -01 23 -01

R62 6 315-01 02 -0 1 R628

321 -0 25 1- 30

R63 0

321 -02 35 -30 R63 2 321- 02 39 -3 0 R63 4

321 -0 263 -3 0 R63 6

321 -0 26 8- 30 R6 3 7

315 -0 56 3- 02 R638

315- 01 52 -0 1

R639A

3.15 -03 32- 02 R64 0 315- 068 2- 01 R64 2

315- 022 1- 01

R644

315 -0 15 3- 02

R64 6

315 -0 56 3- 02 R648 315- 05 11 -01 R65 0

315- 05 11- 01 R65 2

315 -0 222 -0 2 R65 3

315 -0 222 -0 2 R65 5

315- 01 02 -0 1

R65 6

315 -0 103 -0 2 R65 8

315 -03 32 -02 R66 0

315-0 82 2-0 1 R66 1

315- 091 3- 01 R66 3

315 -0 10 4- 02 R66 4

315 -0 33 3- 01 R66 5

315-0 56 2-0 1 R66 6

315 -02 03 -01 R6 6 7

315- 01 12 -0 1 R668

315 -0 10 3- 02 R6 69

315- 010 2- 01 R67 0

315 -01 03 -02

LIST (con t)

Description

2 kfi , Var 10 kfi, 1/4 W , 5 %

2. 2 kfi , 1/ 4 W, 5 %

3. 3 kfi, 1/ 4 W , 5%

10 0 kfi, 1/ 4 W, 5%

5.1 kfi, 1/4 W, 5% 33 kfi, 1/ 4 W , 5% 10 0 kfi, 1/ 4 W , 5 %

7. 5 kfi, 1/8 W , 1%

5 kfi, Var

4. 42 kfi, 1 / 8 W , 1 % 10 Mfi , 1/2 W , 1% 5 Mfi , 1/2 W , 1 %

1 Mfi, 1/ 4 W , 1 /2 % 1 Mfi, 1/4 W , 1/ 2 % 50 0 kfi , 1/4 W, 1/2 % 20 0 kfi, 1/ 8 W , 1/2 %

10 0 kfi , 1/ 8 W , 1/ 2% 50 kfi, 1/8 W , 1/2% 50 kfi x 2 0 kfi, Var 12 kfi, 1/4 W , 5%

1 kfi, 1/4 W, 5%

4. 02 kfi , 1/8 W, 1%

2. 74 kfi , 1/8 W , 1%

3. 01 kfi, 1/8 W , 1%

5.3 6 kfi, 1/ 8 W , 1 %

6.0 4 kfi, 1/ 8 W , 1% 56 kfi , 1/4 W , 5%

1. 5 kfi , 1/4 W , 5%

3.3 kf i, 1/ 4 W , 5%

6. 8 kf i, 1/ 4 W , 5 % 22 0 fi, 1/4 W, 5 % 1 5 kfi, 1/4 W , 5 % 56 k fi, 1/4 W , 5 % 51 0 fi, 1/4 W , 5 % 51 0 fi, 1/4 W , 5 %

2. 2 kfi, 1/ 4 W, 5%

2. 2 kfi, 1/ 4 W , 5% 1 kfi , 1/4 W, 5%

1 0 kfi, 1 /4 W , 5 %

3. 3 kfi , 1/4 W , 5 %

8. 2 kfi, 1/ 4 W, 5% 91 kfi , 1/4 W, 5 % 10 0 kfi, 1/ 4 W, 5% 33 kf i, 1 /4 W , 5 %

5. 6 kfi, 1/4 W , 5 % 20 kfi , 1/4 W , 5%

1. 1 kfi , 1/4 W , 5 % 1 0 kfi, 1/ 4 W, 5 % 1 kfi, 1/4 W , 5% 10 kfi , 1/4 W , 5 %

6-17

Electrical Parts List

Ckt. No.

RESISTORS (c o n t)

R6 7 2 R6 7 4 R6 7 6 R67 8

R6 80 R68 2 R68 4

R6 8 5 R68 6

R6 8 7

R6 9 0 R69 2 R69 4 R69 5 R6 9 6 R70 1 R70 2 R70 3 R70 4 R70 5

R7Q6 R70 8A ,B R7 09

R71 0 R71 1 R71 2 R71 2 R71 3 R71 4 R71 5 R71 6 R71 7

R71 8 R72 2 R72 4 R72 6 R72 8 R73 0 R73 2 R73 4 R73 6 R73 8

R74 0 R74 1 R74 2 R74 3 R74 4 R74 4 R74 5 R74 6 R74 8 R75 0 R75 2

326 (SN 300500-up)

ELECTRICAL PARTS LIST (cont)

Tektronix Serial/Model No.

Part No. Eff

___________

Disc

_____________________

Description

315-0 10 1-0 1 315-02 01-01 315-0 27 2-0 2 315-0 752 -01 315-02 02- 01 315-04 73-01 315-01 03- 02 315-020 2-0 1 315-0 274- 01

315-047 4-01 315- 0102 -01 315-0682 -01 315-010 1-0 1 315-0 100- 01 315- 0100 -01 321- 027 0- 30

.31 1 -0 60 7- 00

321- 030 6-3 0 311- 064 4-0 0 315-0 27 2-0 2

311- 063 3-0 0 311-06 91- 01 315- 0272 -02 321- 0318 -30 315- 010 4-0 2 321- 0356 -30 300 50 0 300 5 0 5 321- 036 6-3 0 300 50 6 311- 0644 -00 315- 027 2-0 2 321- 026 4-30 321- 030 9-3 0 311-0 63 3-0 0

321-0 223 -00 321- 012 6-3 0 321-0 22 3-3 0 321- 026 8-30 321-0 103 -30 315-051 2-0 1 321- 023 9-30 321-0 26 0-3 0 321- 026 0- 30 321- 035 6- 30

321-02 89- 30 321- 023 3-30 321- 0226 -30 321-0 23 1-3 0 315-0 223 -02 300 50 0 30 0 5 05 321- 0322-30 300 50 6 315-0 242 -02

315-024 2-0 2

315-0 33 2-0 2 322- 0610-31

315-030 3-0 2

10 0 fl, 1/4 W , 5% 20 0 fl, 1/ 4 W , 5 %

2. 7 kfl, 1/4 W , 5%

7. 5 kfl, 1/ 4 W , 5% 2 kfl , 1/ 4 W , 5% 47 kfl, 1/4 W, 5 % 10 kfl, 1/4 W , 5 % 2 kfl, 1/4 W , 5 % 27 0 kfl, 1/ 4 W , 5 %

47 0 kfl , 1/4 W , 5 % 1 kfl, 1/4 W , 5%

6. 8 kf l, 1/ 4 W , 5 % 100 fl, 1/4 W , 5 %

1 0 fl, 1/ 4 W , 5 %

10 fl, 1/4 W, 5%

6.3 4 kf l, 1/8 W , 1 % 10 kfl, Var

15 kfl^ 1/8 W , 1 % 20 kfl, Va r

2.7 kfl , 1/ 4 W , 5 %

5 kf l, Var 2 x 20 kfl , Var

2.7 kfl, 1/ 4 W , 5%

20 kfl, 1/8 W , 1% 10 0 kfl, 1/ 4 W , 5 % 49 .9 k £7, (nomi na l v al u e ) sele cte d 6 3. 4' k fl, (n om i na l v a l u e) selecte d

20 kfl, Var

2. 7 kfl , 1/4 W , 5 %

5. 49 kfl, 1/8 W, 1%

16. 2 k fl , 1/8 W, 1% 5 kfl, Va r

2.0 5 kfl, 1/8 W , 1 %

20 0 fl, 1/8 W, 1%

2. 05 kfl, 1/8 W , 1 %

6.0 4 kfl , 1/8 W, 1 %

11 5 fl, 1/8 W , 1%

5. 1 kfl, 1/4 W , 5%

3.01 kfl, 1/8 W, 1 %

4. 9 9 kfl , 1/8 W , 1%

4. 99 kfl , 1/8 W , 1 % 49 . 9 kfl , 1/8 W , 1%

10 kfl, 1/8 W , 1 %

2.61 kfl, 1/8 W, 1%

2.2 1 kfl, 1/ 8 W , 1 %

2. 49 kfl , 1/8 W , 1 % 22 k fl, 1/4 W , 5%

22. 1 kfl , 1/ 8 W , 1 %

2. 4 kf l, 1/4 W , 5%

2.4 kfl , 1/ 4 W, 5%

3. 3 kfl , 1/ 4 W , 5% . 50 0 kfl , 1/4 W, 1/2% 30 kfl , 1/4 W , 5 %

® .

6-18

Electrical Parts List—326 (SN 300500-up)

ELECTRICAL PARTS LIST (cont)

Tektronix Serial/Model No.

Ckt. No. Part No. Eff Disc

/

Description

RESISTORS (cont)

R754 315-0304-01 300 kn, 1/4 W, 5% R756

315-0201-01

200 0, 1/4 W, 5%

R758

315-0103 -02

10 kn, 1/4 W, 5%

R760

315-0474-01 470 k«, 1 /4 W, 5%

R762

315-0102-01

1 kn, 1 /4 W, 5% R764 3 15-02 03-01 20 kn, 1/4 W, 5% R766

315-0303-02 30 k n , 1/4 W, 5%

R768

315-0244-01 240 kn, 1/4 W, 5%

R770

315-0201 -01 200 n , 1/4 W, 5%

R772

315-0103-02 10 kn, 1 /4 W, 5%

R775

315-0101-01 100 n, 1/4 W, 5%

R780

315-0101-01 100 n, 1/4 W, 5%

R782

322-0481-00

1 Mn, 1/4 W, 1% R784

322-0481-00

1 Mn , 1/4 W, 1%

R786

321-0336-30

30.9 kn, 1/8 W, 1%

R788 315-0153-02

15 kn, 1/4 W, 5% R791 315-0100-01

10 n , 1 /4 W, 5%

R792

315-0100-01

10 n, 1 /4 W, 5% R870

321-0300-30

300500

300605X

13 k n, 1/8 W, 1%

R871

321-0368-30 66.5 kn, 1 /8 W, 1%

R872

321-0372-30

300500

300605

73.2 kn, 1/8 W, 1%

R872

321-0380-30 300606 8 8 .7 kn, 1 /8 W, 1%

R873

321-0339 -30

300500

300605X

33.2 kn, 1/8 W, 1%

R878

315-0105-01

1 Mn, 1 /4 W, 5%

R880

315-0470-02

47 n, 1 /4 W, 5%

R882

315-0470-02 47 n , 1/4 W, 5%

R884

315-0100-01

10 n , 1/4 W, 5%

R887

315-0243-01

24 kn, 1/4 W, 5%

R88 8

315-0562 -01

5.6 kn , 1 /4 W, 5%

R8891 R890

315-0243 -01

24 kn, 1/4 W, 5%

R892

315-0243-01

24 kn, 1/4 W, 5%

R894

315-0204-01 200 kn, 1/4 W, 5%

R896

315-0204-01 200 kn, 1/4 W, 5%

R898

315-0432-01 4 .3 kn, 1 /4 W, 5%

R905

321-0318-30

20 kn, 1/8 W, 1%

R906

315-0155-01

1.5 Mn, 1 /4 W, 5%

R907 311-0609-00

2 kn, V ar

R909

321-0268-30

6.0 4 kn, 1/8 W, 1%

R910

315-0103 -02

10 kn, 1 /4 W, 5%

R915

315-0102-01 1 kn, 1 /4 W, 5%

R917

315-0101-01

100 n, 1/4 W, 5%

R922

315-0272-02

2.7 kn, 1 /4 W, 5%

R924

315-0204-01 200 kn, 1/4 W, 5%

R926

315-0682-01 6.8 kn, 1/4 W, 5%

R927

315-0302-01 3 kn, 1 /4 W, 5%

R928

315-0103-02

10 kn, 1 /4 W, 5%

R930

315-0562 -01

5.6 kn , 1/4 W, 5%

R932

315-0621-01

620 n, 1/4 W, 5%

R940

308-0503-00 300500

300540

6. 8 n , (nom in a l va l ue ) selecte d

R940

309-0096-00

300541 10 n , 1/2 W, 1 %

R941

315-0393-01

39 kn, 1 /4 W, 5%

R942

311-1294-00

300500

300885

10 n , Var

R942

311-1294-01

300886

10 n , Var

^■ Sel e cte d a nd add ed if nece s sa ry .

RE V . D O C T 197 4

6-19

Electrical Parts List—326 (SIM 300500-up)

ELECTRICAL PARTS LIST (co n t)

Ckt. No.

Tektronix Serial/Model No.

Part No. Eff Disc

Description

RESISTORS (cont)

R94 3

315- 01 00 -0 1

10 ft, 1/4 W , 5 %

R94 6

315 -0 10 3- 02

1 0 kft, 1/4 W , 5%

R94 8

315- 02 21- 01

22 0 0 , 1/ 4 W , 5%

R96 2

315- 01 50 -0 1

1 5 0 , 1/ 4 W , 5%

R97 2 315- 01 03- 02

1 0 kft, 1/4 W , 5 %

R97 4

315- 010 2-0 1

1 kfi , 1/4 W , 51

R97 6

315-0 10 0-0 1

10 ft, 1/ 4 W , 5%

R10 02 321 -0 35 4- 30

47 .5 kfi, 1/ 8 W , 1%

R10 04 311 -0 63 3- 00

5 kfi, Var

R100 6

321 -0 30 8- 30

15. 8 kS 2, 1/8 W , 1 %

R1008

321- 03 48 -3 0 41. 2 kft , 1/8 W , 1%

R10 0 9

315 -0 474 -0 1

47 0 kf i, 1/ 4 W , 51

RIO 10

315- 033 3- 01

3 3 kf t, 1/4 W , 51

R10 12 315- 01 82 -0 2

1.8 kft, 1/4 W , 51

R101 8

315- 010 2-0 1

1 kfi , 1/4 W , 51

RI O 20

315 -0 472 -0 1

4. 7 kfi, 1/ 4 W, 51

R10 22

315- 04 70 -0 2

4 7 0 , 1/4 W , 51

R1024

315- 01 62 -0 1

1. 6 kfi, 1/ 4 W , 5%

R10 26 32 1-0 33 4-3 0

29. 4 kfi , 1/8 W , 11

R102 8

321- 03 00- 30

13 kfi, 1/8 W , 11

RI O 30 311 -06 09 -00

2 k fi, Var

R10 32

321- 032 0- 30 21 kft, 1/8 W , 11

R104 0

301- 022 6- 01

22 Mf t, 1/2 W , 51

R10 42

311-0 69 0-0 1

5 Mft, Var

R1044

315- 010 5- 01

1 Mft, (nom in al va l u e )

_ R 1046

311- 12 93 -0 0

, 3 0050 0

3 00 885' 1 Mf t, Var

R1046

311- 12 93 -0 1

300 88 6

1 Mft , Var

R104 8

301- 010 6-0 1

10 Mft , 1/2 W , 51

RI O 4 9

301-0 475- 01

4. 7 Mft, 1/2 W , 51

R10 50

311 -06 90 -01

5 Mft ,. Var

R1051A

315 -01 83 -02

18 kft, 1/4 W , 51

RI O 5 IB

315- 0392 -01

3.9 kf t, 1/ 4 W , 51

R1051C

321- 01 93- 30

1 k ft, 1 /8 W , 11

R105 2

301 -0 685 -0 1

6.8 Mf t, 1/2 W , 5 %

R105 3

301- 047 5-0 1

4. 7 Mft, 1/ 2 W , 51

R105 4

301 -04 75 -01

4. 7 Mft, 1/2 W , 5%

R105 5

301- 047 5-0 1

4. 7 M R , 1/2 W , 51

R105 6

315 -04 70 -02

47 ft, 1/4 W , 51

R105 7

315- 04 70- 02

47 ft, 1/4 W , 51

R105 8

315- 075 4- 02

75 0 kft , 1/4 W , 51

R10 5 9

315- 020 4-0 1

20 0 kft, 1/4 W , 51

RI O 60

311- 06 07 -0 0

10 kft, Var

R106 2

311- 06 60- 00

20 0 kft, Var

R1064

315- 020 4- 01

20 0 kft, 1/ 4 W , 51

R10 66

315- 0244 -01

24 0 kft, 1/ 4 W , 51

R106 8

311- 06 60 -0 0

20 0 kf t, V ar

R10 70

315-0 39 3-0 1

39 kft , 1/4 W , 51

R11 05

315- 056 2- 01

5. 6 kf t, 1/ 4 W , 51

R111 5

308- 046 3- 00

0.3 ft, 3 W , WW, 11 ;

R111 8

315- 047 2-0 1

4. 7 kf t, 1/4 W , 51

R11 1 9

315-0 100 -01

10 ft, 1/4 W , 51 .

R11 20

315- 01 02- 01

1 k ft , 1/4 W , 51

R112 3

315- 04 71- 02

47 0 ft, 1/ 4 W , 51

R11 30

315- 027 2- 02

2. 7 kft, 1 /4 W , 5%

sele ct ed

6-20

Electrical Parts List—326 (SN 300500-up)

ELECTRICAL PARTS LIST (cont)

Ckt

No.

Grid

Loc

Tektronix

Part No.

Serial/Model No. Eff Disc

Description

RES IS TO RS

( c ont)

R113 3 301-01 85 -01

1.8 Mfi , 1/ 2 W , 5%

R1135

315- 07 52 -0 1

7. 5 kfl , 1/4 W , 5%

R11 37

315- 01 02 -0 1

1 kfi, 1/ 4 W , 5 %

R113 8

315- 01 02 -0 1

1 k D , 1/ 4 W , 5 %

R11 3 9

315 -01 52 -01

1. 5 kfl, 1/ 4 W , 5%

R114 1

315 -0 272 -0 2

2. 7 k£2 , 1/4 W , 5%

R114 3

321- 03 41- 30

34. 8 kfi, 1/ 8 W , 1%

R1144

311- 06 35 -0 0

1 kf2, Var

SWI TC HE S

S201

670- 18 29- 00

Pus hbu tt on, AC-GND-DC (IN P UT COUPL ING

S3 0

105 -03 02 -00

Actua tor as se mb ly , VOL TS/DI V CH I

S4 0 -

260- 09 05 -0 2

Sl id e , X10 VERT GAIN CH I

S220X

670- 18 30 -0 0

Pus hbu tt on, AC-GND- DC (IN P UT COUPL ING

S2 30

105- 03 02 -0 0

Actuator as se mb ly , VOLTS /DI V CH2

S24 0

260 -09 05 -02

Slid e X 10 VER T G AIN CH2

S3 02

260- 11 32 -0 2

PUS H , IN VE RT CH2

S33 0

260 -1 367 -0 0

Ro ta ry , VER T M ODE

S500X

670- 18 27 -0 0

Pus hbu tt on, TRIG SO UR CE

S53 5

260 -0 90 5- 00 Sl i de , X1 0 HORI Z MAG

S5401

670 -1 82 8- 00

Eushbutton,.TRIG SOURCE /COU PLI NG

S56 0

wired

262- 09 57 -0 0 3005 00 3008 85

Rot ar y, TR IGGER SL OPE

S56 0

wired

262 -0 95 7- 01

300 88 6

Rota ry , TRIGGER SLO PE

S56 0

260 -08 86 -00

Rot ar y, TR IGGER S LO PE

S62 0 105-0 30 1- 00

Actu ato r asse mb ly , TIME/DIV

S7 10

260 -09 05 -03

Sl id e , X10 HORIZ MAG PU LL

S86 0

260 -1 372 -0 0 Slide

S87 0

260 -0 834 -0 0 Toggle, POWER

S11 12

260 -09 05 -01 Sl ide F ULL CHG /TR ICK LE CH G

TRANS FOR MER S

R410

120 -0 76 4- 00

Toroi d

T930

120- 07 60- 00 Bl oc kin g

T9 7 0 120 -0 75 9-0 0

Fly-b ack

T980

120 -07 58 -00

Curr ent sensi ng

T1101

120- 075 7- 00

Powe r

INTEG RATED C IR CU IT

U910 156- 00 53- 00 Voltag e regu la to r, UA723C

ELECTRON TU BE

V1060

154 -06 67 -00

CR T

DIOD ES, ZENER

VR95

152- 028 0- 00

Zener,

1N 7 53 A , 0.4 W , 6. 2 V , 5%

VR692

152- 01 66- 00

Zener,

1N 75 3 A , 0.4 W , 6. 2 V , 5%

VR760

152- 021 7- 00

Zener,

1N 7 5 6A ,

0.4 W , 8. 2 V , 5 %

VR882

152- 01 95 -0 0

Ze n e r ,

1N 75 1 A ,

0,4 W , 5.1 V , 5%

VR887 152-0 21 7-0 0

Ze n er ,

1N 75 6 A , 0.4 W, 8.2 V , 5 %

VR898

152- 02 78- 00

Ze n e r,

1N4 372 A

, 0.4 W , 3 V, 5 %

VR941

152- 02 78 -0 0

Zener,

1N43 72A

, 0.4 W , 3 V , 5%

VR973

152- 01 95 -0 0

Ze n er , 1N75 1 A ,

0.4 W , 5. 1 V, 5%

VR996

152- 01 66- 00

Ze n er , 1N75 3 A ,

0.4 W , 6. 2 V, 5%

VR99 7

152- 01 66- 00

Zener,

1N 7 53 A ,

0.4 W , 6. 2 V , 5%

VR1051

152- 03 59- 00

Zener,

0.2 5 W ,

9 V , 5%

VR106 2

152- 02 81 -0 0

Ze n er , 1N969B, 0.4 W , 22 V , 5 %

VR11 49

152- 01 66- 00

Ze n er ,

1N 75 3 A ,

0.4 W , 6.2 V , 5%

^Se e Mech anica l Par t s Lis t for rep lac emen t pa r t s.

E 6-21

326 (SN300500-up)

SECTION

7

DIAGRAMS AND CIRCUIT BOARD ILLUSTRATIONS

Symbols and Reference Designators

Electrical components shown on the diagrams are in the following units unless noted otherwise:

Capacitors = Values one or greater are in picofarads (pF).

Values less than one are in microfarads (juF).

Resistors = Ohms (£2)

Symbols used on the diagrams are based on USA Standard Y32.2-1967.

Logic symbology is based on MIL-STD-806B in terms of positive logic. Logic symbols depict the logic function performed

and may differ from the manufacturer's data. The following special symbols are used on the diagrams:

©

External Screwdriver adjustment.

External control or connector.

Clockwise control rotation in direction of arrow.

Refer to diagram number indicated in diamond.

Refer to waveform number indicated in hexagon.

Connection soldered to circuit board.

— © - ^ A A r

Connection made to circuit board with interconnecting pin.

P/D circuit: boa#:

Blue tint encloses components located on circuit board.

f

The following prefix letters are used as reference designators to identify components or assemblies on the diagrams.

A Assembly, separable or repairable (circuit board, etc.) AT Attenuator, fixed or variable B Motor BT Battery C Capacitor, fixed or variable CR Diode, signal or rectifier DL Delay line DS Indicating device (lamp)

F Fuse

FL Filter H Heat dissipating device (heat sink, heat radiator, etc.) HR Heater J Connector, stationary portion

K Relay

L Inductor, fixed or variable

LR Inductor/resistor combination M Meter Q Transistor or silicon-controlled rectifier P Connector, movable portion

R Resistor, fixed or variable

RT Thermistor S Switch T Transformer TP Test point

U Assembly, inseparable or non-repairable (integrated

circuit, etc.) V Electron tube VR Voltage regulator (zener diode, etc.) Y Crystal

7-1

V O L T S / D I V

BLOCK DIAGRAM

> o

uJ

Cl

O

o (0

o

-J

o

cO

o

cm

CO

B L O C K D IA G R A M 2 t 3

'^ O O ’S O O - U P

A1 & A4 BOARD PHOTOS

j

Fig, 7-2

'C' blu (teflon) '1ST C20 lead

'M' C20 lead

'A' grn-grn on gry (coax)

'B' shield

Fig. 7-1. A1. CH 1 AC-DC

Efe

i

S 30

+

CH I SWITCH SHOWN IN

VO LTS / D I V .O IV O L T /D IV POSITION

<3>

+

H , CHANNEL 1 ATTENUATORS

/ CA L IB R AT OR

<i>

5 Nt " io o S>QO - U P

326 OSCILLOSCOPE

17 S

DAT

CH 1 ATTEN & CAL1B

A3 VERT PREAMP BOARD

Fig. 7-4. A3 Vertical Preamp component location.

is

i

I

'E' blk-grn on wht

'BC' 'BD' blk-grn on wht

'BL' shield for 'WZ'*

'W' blk (2 cond coax)

'Z' red (2 cond coax)

L' red (2 cond coax)

BG' shield for 'L' & 'M'

'M' blk (2 cond coax)

'AC' orn-orn on gry

AA' yel-yel on gry

s, (coax)

'BJ' blk-grn on wht

'S' blk-grn on wht

'Q' red teflon

'P' vio on wht

'O' blu on wht

'R' brn teflon

'B' vio on wht

'T' grn on wht

'P' grn on wht

'BK' grn on wht

'BF' grn on wht

'V'shield for 'U

'U' coax

'Y' blk (2 cond coax)

'X' red (2 cond coax)

'XY' shield for 'XY

'BE' grn on wht

'H' shield for 'G

'G' coax

'J' red (2 cond coax)'

'JK' shield for 'J' & 'K'

'Bl' shield for 'I'

'I' red-red on gry

(coax)

'C' red teflon

'A' blu on wht 'D' brn teflon

'CR', 'CQ', delay line

/AK' 'BO' grn on wht

'AL' 'BQ' blk-grn

on wht

'CP', 'CO', delay line

CZ' blk (2 cond coax)

'DL' shield for

'CW', 'CZ'

'DG' shield for

'CL', 'CM'

AH' wht (3 cond

coax)

'AE' orn-red on gry

(coax)

AF' shield for 'AE'

'AJ' shield for 'AT, 'AG', 'AH'

'AG' blk (3 cond coax)

- 'AT red (3 cond coax) CM' blk (2 cond. coax)

'CL' red (2 cond. coax)

CW' red (2 cond. coax)

Fig. 7-5. A3 Vertical Preamp board wiring color codes.

REV. B, OCT. 1974

SEE PARTS LIST FOR EARLIER VALUES AN D SERIAL NUMB ER RANG ES O F PARTS MA RKED WIT H BLUE OUTL INE.

326 OSCILLOSCOPE

CHANNEL 1 V E R T IC A L P RE AMP

SN 5 00 B 0 0 -U P

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'B' wht

'A' blu-blu on gry (coax)

'M' C220 lead

'N' C220 lead

JC' blu (teflon)

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Fig. 7-6. A2 Ch 2 AC-DC board.

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'B' shield for 'A'

'J' #20 teflon (162-0026-00)

'L' No. 20 teflon (162-0026-00)

- 'K' No. 20 teflon (162-0026-00) 'E' vio on wht

-------

T blk on wht— 'H' grn on wht

'F' brn on wht

'M' No. 20 teflon (162-0026-00)

Fig. 7-7. A5 Vertical Output board component location.

'G' blk-grn on wht

'C' orn-orn on gry (coax)

'D' shield for 'C'

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'C' orn-red on gry (coax)

‘O' shield for JC'

'E' orn-orn on gry (coax) JF' shield for 'E'

JB' shield for 'A'

'A' red-red on gry (coax)

Fig. 7-8, A6 Trigger Source board component location and wiring color codes.

'A' vio-wht on gry (coax) 'B' shield for 'A'

'E' blk-yel on gry (coax)

'F' shield for 'E'

'Gr blk-red on wht \J' blk-grn on gry (coax)

'K' shield for 'J' 'C' gry (coax) 'D' shield for 'C'

‘V blk-brn on wht

Fig. 7-9. A7 Trigger Source Coupling board.

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'D' blu-orn on wht

r

'P' yel-red on wht

'SN' grn on wht

'BP' shield for 'BO'

'E' red on wht

'AR' grn-wht on gry (coax,

'AP' yel-wht on gry (coax)

'BO' orn (coax)

'BQ' brn on wht 'AQ' red on wht

'GG' blu on wht

'HH' vio on wht

'NR' blk-grn on wht

'T' red-brn on wht

'U' orn-brn on whi_

'V' yel-brn on wht_

'Z' gry-brn on wht

Y' vio-brn on wht

_

___

'X' blu-brn on wht

W' grn-brn on wht

Fig. 7-10. A8 Trigger-Sweep board wiring color code.

-'A' grn-blk on gry (coax)

B' shield for 'A'

■'O' grn-red on wht

JM' grn on wht

'R' red-wht on gry (coax)

K' orn-wht on gry (coax)

Fig. 7-11. A8 Trigger-Sweep board component locations.

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“'C' yel-brn on wht

'D' grn-brn on wht

'E' blu-brn on wht

'F' vio-brn on wht

'G' gry-brn on wht

'H' orn-red on wht

'B' orn-brn on wht

'A' red-brn on wht

K' yel on wht

M' grn-red on wht

L' red (teflon)

1ST blu on wht

O' vio on wht

— V blk-brn on wht

Fig. 7-12. A9 Timing board.

Tektronix 326 Instruction Manual

Specifications and Main Features

Frequently Asked Questions

User Manual