Tektronix 620-0295-00 Service Manual

COMMITTED TO EXCELLENCE

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Tektronix, Inc.

P.O. Box 500

Beaverton, Oregon 97077

MANUAL PART NO.

070-3732-00

620-0295-00

LOW VOLTAGE

POWER SUPPLY

SERVICE MANUAL

First Printing FEB 1981 ·

WARNING

I

THE FOLLOWING SERVICING INSTRUCTIONS ARE FOR USE BY QUALIFIED PERSONNEL ONLY. TO AVOID PERSONAL INJURY, DO NOT PERFORM ANY SERVICING OTHER THAN THAT CONTAINED IN OPERATING INSTRUCTIONS UNLESS YOU ARE QUALIFIED TO DO SO.

This instrument, in whole or in part, may be protected by one or more U.S. or foreign patents or patent applications. Information provided on request by Tektronix, Inc., P.O. Box 500, Beaverton, Oregon 97077.

TEKTRONIX is a registered trademark of Tektronix, Inc.

©

1981 by Tektronix, Inc., Beaverton, Oregon.

MANUAL REVISION STATUS

PRODUCT: 620-0295-00 Low Voltage Power Supply

This manual supports the following versions of this product: Part Numbers 620-0295-00 and up

REV. DATE

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FEB 1981

DESCRIPTION

Original Issue

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620-0295-00 POWER SUPPLY

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Section 1

Section 2

Section 3

CONTENTS

INTRODUCTION Page

About This Manual ..................................... 1-1

Description of the Module ............................... 1-1

General ............................................. 1 -1

Physical Description ................................. 1-1

SPECIFICATIONS

Physical ............................................... 2-1

Electrical .............................................. 2-1

Environmental .......................................... 2-3

External Connections ................................... 2-4

MAINTENANCE

Safety Summary ........................................ 3-1

General ................................................ 3-1

Changing the Line Voltage .............................. 3-2

Troubleshooting ........................................ 3-2

Equipment Required ................................. 3-3

Preparation .......................................... 3-4

Control Circuit ....................................... 3-4

Primary Circuit ...................................... 3-6

Logical On/Off Switch ................................ 3-7

DC Supplies ......................................... 3-8

Timing Circuit ....................................... 3-8

Assembly/Disassembly ................................. 3-9

Replacing the Line Rectifier .......................... 3-9

Replacing the Switching Transistors .................. 3-9

Removing the Inverter Board ......................... 3-1

Removing the Regulator Board ........................ 3-11

Replacing the+ 5 V Rectifier ......................... 3-12

Access to the Cavity ................................. 3-1 2

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Section 4

620-0295-00 POWER SUPPLY

PERFORMANCE CHECK

Equipment Required ................................. 4-1

Procedures ............................................ 4-2

NOTE

Refer to the host product service manual for the adjustment procedure.

DC Voltages ......................................... 4-2

INIT-0 and PWRFL-0 ................................. 4-2

Maximum and Minimum Line Voltage .................. 4-3

Current Limiting and Maximum Loads ................. 4-3

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ii

Section 5

THEORY OF OPERATION

Introduction ............................................ 5-1

DC Supplies ......................................... 5-2

System Interface Signals ............................. 5-2

Block Description ...................................... 5-3

Detailed Circuit Description ............................. 5-4

Primary Circuit ...................................... 5-4

Control Circuit ....................................... 5-6

DC Supplies ......................................... 5-8

Timing Circuit ....................................... 5-11

Section 6

Section 7

Section 8

Appendix A

REPLACEABLE ELECTRICAL PARTS

DIAGRAMS AND SCHEMATICS

REPLACEABLE MECHANICAL PARTS

SIGNAL DEFINITIONS AND REFERENCES

TABLES

Table

2-1 Line Input ................................................. 2-1

2-2 DC Supplies .............................................. 2-2

2-3 TTL Signals ............................................... 2-3

2-4 Environmental Limits ...................................... 2-3

2-5 External Connections ..................................... 2-4

4-1 Power Supply Voltage Limits ............................... 4-2

5-1 Base Drive Circuit States .................................. 5-8

Description

Page

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620-0295-00 POWER SUPPLY

ILLUSTRATIONS

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Figure

1-1 1-2 2-1 3-1 3-2 3-3 3-4 3-5 3-6 3-7

3-8

3-9

3-10

3-11 3-12 3-13 4-1 4-2 4-3 5-1 5-2 5-3 5-4 5-5 5-6 5-7

Description

The 620-0295-00 Low Voltage Power Supply ............... vi

Line Voltage Switches ..................................... 1-1

Dimensions ............................................... 2-1

Changing Line Voltage .................................... 3-2

Test Connectors .......................................... 3-3

Connection of Test Load ................................... 3-4

Base Drive Test Point ..................................... 3-5

Base Drive Waveform ...................................... 3-5

Inverter Dead Time ........................................ 3-5

Connecting the Current Probe ............................. 3-6

Bypassing Triac ........................................... 3-6

Inverter Waveform ......................................... 3-7

Mounting of Switching Transistors ......................... 3-9

Removing the Inverter Board ............................... 3-1

Removing the Regulator Board ............................. 3-11

Mounting the Diodes to the Heat Sink ...................... 3-12

Power Supply Test Points .................................. 4-2

Power-Up Waveform ...................................... 4-3

Power-Down Waveform .................................... 4-3

Simplified Inverter Circuit. ................................. 5-1

Configuration for the 115 V Line ........................... 5-4

Configuration for the 230 V Line ........................... 5-5

Logical On/Off Switch ..................................... 5-6

Pulse Width Modulator 1.C .................................. 5-7

Typical Post-Regulator Circuit ............................. 5-9

Foldback Current Limiting Characteristic ................... 5-9

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620-0295-00 POWER SUPPLY

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iv

SAFETY SUMMARY

DO NOT SERVICE ALONE

Do not perform service or adjustment of this module unless another person capable of rendering first aid

and resuscitation is present.

USE CARE WHEN SERVICING WITH POWER ON

Dangerous voltages exist at several points in this module. To avoid personal injury do not touch exposed connections or components while the power is on.

Disconnect the power before removing protective panels, soldering, or replacing components.

After the power has been disconnected, the neon flasher on the Inverter board indicates that dangerous voltages still are present in the filter capacitors.

POWER SOURCE

This module is intended to operate from a power source that applies less than 250 volts rms between the supply conductors or between either the supply conductor and ground. A protectjve ground connection by way of the grounding conductor in the power cord is essential for safe operation.

620-0295-00 POWER SUPPLY

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V

Figure

1-1.

The 620-0295-00 Low Voltage Power Supply.

vi

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620-0295-00 POWER SUPPLY

Section

1

INTRODUCTION

ABOUT THIS MANUAL

This manual provides the technician with service information for the 620-0295-00 Low Voltage Power Supply module (Figure 1-1). It includes specifications, troubleshooting information, performance check procedures, circuit descriptions, and schematics.

DESCRIPTION OF THE MODULE

GENERAL

The module is a high-efficiency power supply intended for installation in a number of Tektronix products. The product in which it is installed is referred to as the host product in this manual.

The module occupies approximately 5 by 5 by 9.5 inches within the chassis of the host product. An external heat sink is approximately 7.5 by 1 Screws through the heat sink attach the module to the chassis.

PHYSICAL DESCRIPTION

Main Assemblies

The power supply circuits are contained primarily on four boards:

inches.

O

The adjustment procedure is described in the service manual for the product in which the power supply is installed.

Controls and Indicators

• Two Line Voltage switches allow operation on either 115 or 230 VAC nominal line voltage. These switches are accessible through the heat sink (Figure 1-2).

• A Logical On/Off switch isolates the system switch

from line voltage. The host product turns on the power supply by grounding the switch s·ignal line

(OFF-1

the power on until its operations are complete even

if the operator has turned off the system power

switch.

• A high voltage warning flasher indicates the presence of dangerou·s voltages on the Inverter board.

/ON-0).

This allows the host product to keep

f

• A VDE Line Filter board to supplement the chassismounted line filter.

• A Line Voltage Selector board.

• An Inverter board, which rectifies and filters the line voltage, then chops it at 20 kHz to drive the inverter transformer. The Control circuit regulates voltages by varying the width of the 20 kHz pulses according to the input and output voltages and load current.

• A Regulator board, which rectifies and filters output of the inverter transformer and provides post-

regulation. It also contains protection circuits and

asserts TTL signals for use by the host product.

AC is available to drive fans and other components.

620-0295-00 POWER SUPPLY

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FUSE

LINE

VQLTAGE

SWITCHES

3732•34

Figure 1 -2. Line Voltage Switches.

1-1

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Section 2

SPECIFICATIONS

PHYSICAL

Figure 2-1 gives the dimensions of the module. It weighs 9.5 lbs (4.3 kg).

ELECTRICAL

Tables 2-1, 2-2, and 2-3 give the electrical specifications for the Power Supply module. The following definitions explain the column headings.

Characteristic: Performance Requirement:

characteristic in quantitative terms of performance, usually in limit form. The Performance Check section of this manual describes procedures to verify the performance.

Characteristic

Line voltage

115 V nominal 230 V nominal

Frequency Crest factor

Fuses

Maximum power

consumption

aExcludlng AC for fans and disk. If maximum current were drawn from all DC supplies simultaneously, it would result in Input power of approximately

510W.

Property of equipment.

A statement that defines a

Table 2-1

LINE INPUT

Performance Requirement

90 to 132 V 180 to 264 V

Supplemental Information

48 to 6!3 Hz

1 .35 to 1 .41 4 115 V: 6.25 A

medium 230 V: 3 A fast

35owa

Supplemental Information:

performance requirements or that provide reference information. These are not supported by performance check procedures in the manual.

The performance requirements .cited in this section are valid only within the following conditions:

5 V supply is between 3 and 30 A.

• The load on the

• AC line supply is 48 to 66 Hz, 90 to 132 V or 180 to 264 V, with the crest factor between 1 .35 and 1 .414. The crest factor is the ratio of peak to rms voltage. It

falls below 1.414 as the voltage departs from a sine wave.

• The module has been calibrated within and is

operating within the specified environmental limits.

+

Statements that explain

(

620-0295-00 POWER SUPPLY

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Figure 2-1. Dimensions.

2-1

SPECIFICATIONS

Table 2-2

DC SUPPLIES

Characteristic

+ 5 V Supply a

Regulation

Ripple Minimum load Maximum load Foldback cur-

rent limiting Overvoltage

protection

+ 12 V Supply

Regulation Ripple Maximum load Foldback cur-

rent limiting Reverse volt-

age clamp Overvoltage

protection

Performance Requirement

±3%

30A <37

A

±3%

4A <6A

Supplemental Information

Measured at sense line

100 mV p-p 3Ab

:,;;;;1v

C

20 mV p-p

-0.7V

±15

voe

±17 V peak

Characteristic

+ 55 V Supply

Regulation

Temperature coefficient

Ripple

Maximum load

Foldback cur-

rent limiting

Reverse voltage clamp

-5.2 V Supply Regulation Ripple Maximum load

Foldback current limiting

Reverse voltage clamp

Performance Requirement

±2%

1.25 A <1.6A

±4%

4A <4.8A

Supplemental Information

Initial setting: +55.1 V±100mV

5 mV per °C average

from O to

10°c at

VR579 25 mV p-p at 60 Hz

50 mV p-p at 40 kHz

-0.7V

100 mV p-p

+0.7 V

+ 24 V Supply

Regulation

±3% Ripple Maximum load Foldback cur-

1.8 A

<2.8A rent limiting

Reverse voltage clamp

aS.075 Vat point of regulation In host product. bMinimum loads are not required for the other supply voltages.

0

speclal Requirements for Memory Boards: During power up, the -12 V supply must reach -5 Volts before the +12 V supply reaches +1 O power down, the +1 2 V supply must not overshoot.

2-2

------ -- --- ------------

20 mV p-p

-0.7V

v. During

-12 V Supply Regulation Ripple Maximum load Foldback cur-

rent limiting Reverse volt-

age clamp

@

±3%

20 mV p-p 1 A <1.5A

+0.7V

620-0295-00 POWER SUPPLY

SPECIFICATIONS

Table 2-3

TTL SIGNALS

Supplemental

Information

TTL initialization signal

TTL power failure warning signal

Characteristic

INIT-0

PWRFL-0

Performance Requirement

Must stay low at least 50 ms after supply comes into regulation. Goes low

+

when drops out of regulation.

Must go low at least

11 ms before INIT-0.

5 V

+

5 V supply

ENVIRONMENTAL

Table 2-4 describes the environment in which the

Power Supply module is intended to operate. The performance requirements in the electrical specifica-

these environmental limits are met.

tion are valid only

if

Table 2-4

ENVIRONMENTAL LIMITS

Characteristic Information Temperature

Operating ambient

Non-operating -55 to 75°C

Humidity

Operating and Up to 90% noncondensing Non-operating

Altitude

Operating

Non-operating 50,000 ft (15 km)

Vibration

Non-operating

Shock

Non-operating Withstands 3 g, halfsine, 11 ms, 18

Bench handling

Non-operating Withstands drop from 45 degrees, 4 in

Packaged product Qualifies under National Safe Transit vibration and shock

Electromagnetic compatibility A computing devices (Docket No.

Line transients

Oscillatory surge

Ride-through

Heat sink: Circuit boards: Oto 70°C

15,000 ft (4.5 km). Decrease maximum operating temperature -1 °C for every 1,000 ft (300 m) above 5,000

Withstands 0.Q15 in p-p (0.38 mm), to 55 Hz sine wave, 15 min each axis and 1 0 min each axis at resonance or 55 Hz.

shocks

(102 mm); or equilibrium on all significant faces.

Association Pre-Shipment Test Procedure, Project 1 A-B-1, when packaged as shipped from factory.

Qualifies under FCC standard for Class

20780) with respect to conducted emissions.

For radiated emissions, refer to specification for the host product.

Withstands oscillatory surges up to 2.5 kV at i .5 MHz.

At line voltages between 95 and 132 V or 180 and 264 V, supplies remain within regulation for at least 20 ms after loss of line voltage. For line voltages be~ween 90 and 95 V, supplies remain in regulation for at least 1 0 ms.

to 40°C

o

(1 .5 km).

ft

iO

620-0295-00 POWER SUPPLY

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2-3

SPECIFICATIONS

EXTERNAL CONNECTIONS

Table 2-5 describes the connections between the

Power Supply module and the host product.

Connector

J71 J72 J73-1

-2

-3

-4

-5

-6

-7

-8

-9

-10

J74-1

-2

-3

-4

J76-1

-2

J1001 1-3

-2

J1002 1-3

-2 J1003 J1004 J9001

Table 2-5

EXTERNAL CONNECTIONS

Name Use

+5 RTN +5 +12V

+ 12 V G SENSE

+5 V SENSE + 5 V sense from host PWRFL-0

INIT-0 GND

-12V

-5.2V -5.2 V output

-5.2V

GND +24V +24V +55V

OFF-1/ON-0 GND

Return for+ 5 V supply + 5 Voutput + 12 Voutput

+ 12 V output Ground sense from host

product product

Power failure warning Power up initialization

signal Return for all supplies

except+ 5 V

-12 V output

-5.2 V output Ground

+ 24 V output + 24 V output + 55 V output

Power control line from host product

Ground

115 VAC output

Safety ground

115 VAC output (empty)

115 VAC output 115 VAC output Power cord

2-4

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620-0295-00 POWER SUPPLY

Section 3

MAINTENANCE

SAFETY SUMMARY

WARNING

The VOE Line Filter, Line Voltage Selector, and Inverter boards are connected directly to the AC lines. To avoid injury by electrical shock an isolation transformer should be used during servicing of these boards.

Turning off the host product does not disconnect the Power Supply module from the AC lines nor does it always shut down the DC supplies on certain host products. Do not rely on the host system switch to remove voltages. Disconnect

the power cable from the AC line.

GENERAL

The module does not require routine maintenance. This section contains procedures and information on

the following topics:

• Changing the line voltage.

• Troubleshooting and bringing up supplies which have been repaired.

I

After the power has been disconnected, the neon

flasher on the Inverter board indicates that dangerous voltages are still present in the filter capacitors.

fault conditions may cause the switching

Some

transistors or other primary components to ex-

plode. To avoid injury to your eyes wear safety

glasses while servicing the power supply.

• Assembly/disassembly of the module. Refer to the Performance Check section for the

performance check procedure. Refer to the host product service manual for the adjustment procedure.

620-0295-00 POWER SUPPLY

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3-1

MAINTENANCE

PREPARATION

1. Verify that the Line Voltage switches are set to the proper voltage.

I

WARNING

The fuse holder is connected directly to the AC lines without an intervening switch. To avoid injury by electrical shock, disconnect the power cord before removing the fuse.

2. Verify that the proper fuse is installed. Refer to Table 2-1 for the fuse specification.

3. Connect a suitable load, such as the one described in Figure 3-3.

Figure 3-3. Connection of Test Load.

I

CONTROL CIRCUIT

This test examines the output of the Control circuit

before connecting the Power Supply to the AC line.

external source provides local DC to operate the circuit. The Logical On/Off switch is tested separately.

1. Set the oscilloscope as follows: CH 1 VOL TS/DIV

TIME/DIV TRIGGER SOURCE TRIGGER SLOPE TRIGGER MODE

2. Connect Channel 1 of the oscilloscope to Pin 1 of the base drive transformer (T540, Figure 3-4). Position the ground reference in the center of the screen.

3. Connect the external DC source to J63 using the

harmonica connector shown in Figure 3-2A. If the external supply does not include a voltmeter, connect one across its output. (The loop between Pins 1 and 2 of the harmonica connecter disables the+ 5 V current limiting circuit. The current sense amplifier does not operate properly in the absence of line voltage.)

4. Turn on the external DC source. Gradually bring up the DC voltage while observing the oscilloscope display. The Schmitt trigger should turn on when the voltage reaches about 21 V. At this point, the display should appear similar to that shown in Figure 3-5.

Failure to trigger may be caused by bad transistors in the Schmitt trigger. Departure from the waveform shown in the figure indicates a fault in the Pulse Width Modulator circuit or the Base Drive circuit.

NOTE

If

the switching transistors have failed, CR45 and CR555 may have become leaky and should also be replaced.

10 10µ,s

CHANNEL1

+

AUTO

An

7

3-4

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620-0295-00 POWER SUPPLY

MAINTENANCE

r

5. Gradually turn down the DC voltage. The Schmitt trigger should turn off at about 11 V.

6. Reset the external DC to 24 V.

7. Change the oscilloscope setting as follows:

B TIME/DIV 1 HORIZ DISPLAY A INTEN B SOURCE STARTS AFTER

8. Adjust DELAY TIME POS until the intensified zone

agrees with that shown in the top of Figure 3-6.

µ,s

DELAY

9. Change HORIZ DISPLAY to B DL Y'D and verify that the dead time interval (shown in Figure 3-6) is

If it is not, replace

.

j

...

µ,s.

w·

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ti

L-

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a

-

T, ..

...

..

,.

..

'-•

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-1

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...

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....

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3732-8

equal to or greater than 4.3 U575.

1 0. Reset HORIZ DISPLAY to A.

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t .....

.-

..

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Figure 3-5. Base Drive Waveform.

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Figure 3-4. Base Drive Test Point.

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V

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v/

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---

--·-•·

•-

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• - I• .. - ; ;.·-•:•

.....

-

Figure 3-6. Inverter Dead Time.

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...

b\ •

L. •.

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-

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3732-9

620-0295-00 POWER SUPPLY

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3-5

MAINTENANCE

PRIMARY CIRCUIT

This test applies AC to the Primary circuit. The test checks the primary side of the inverter and the local DC supply for the Control circuit.

1. Set up the oscilloscope and external supply as described in Steps 1, 2, 3, and 6 of the preceding

test.

2. Turn off the external DC supply.

3. Connect the DC current probe amplifier output to Channel 2.

a. Connect the current probe to Lead 9 of the

inverter transformer (T320). This is the white

wire located as shown in Figure 3-7.

b. Set AMPS/DIV on the current probe amplifier

to 2 A.

c. Set Channel 2 VOL TS/DIV to the value

specified on the amplifier (typically 10 mV).

d. Position the ground reference two divisions

from the bottom of the screen.

4. Place the jumper (Figure 3-2C) on J60 (Figure 3-8). ,::~is bypasses the triac. It also bypasses the Logical On/Off Switch and the power switch on the host product.

5. Verify that the autotransformer is off and that the

voltage control is set to 0. Connect the power supply to the isolation transformer, and then connect the isolation transformer to the autotrans-

former.

6. Turn on the external DC supply.

~

The + 5 V current limiting circuit is disabled

during this portion of the test. To avoid damage to

the supply, carefully observe the oscilloscope

display for current greater than 4 A (2 divisions).

3-6

Figure 3- 7. Connecting the Current Probe.

@

3732-11

Figure 3~8. Bypassing Triac.

620-0295-00 POWER SUPPLY

MAINTENANCE

r

l

7. This step examines the inverter waveform while applying line voltage. Refer to Figure 3-9, which compares the Inverter waveform (bottom) with the

Base Drive waveform (top) which was obtained in

the previous test.

a. Turn on the autotransformer. Gradually in-

crease the line voltage while watching the

oscilloscope. The current increases gradually

while the control is moved from approximately

12% to 40% of its travel. During this period the

supply voltages are coming up.

b. The pulse width narrows when the supply

comes into regulation. This should occur at approximately 1 A with a minimum load or at approximately 2 A with a 15 A load on the + 5 V supply. Further increases in the line voltage should continue to reduce the duty cycle.

NOTE

A fault is indicated if the primary current exceeds

approximately 4 A or if the waveform departs markedly from that shown in the lower half of Figure 3-9.

8. Remove the harmonica connector which attaches the external supply to J63. This also enables current limiting. The power supply should continue to run. Failure to do so indicates a fault in the+ 5 V current limiting circuit or the+ 24 V internal supply to the Control circuit.

LOGICAL ON/OFF SWITCH

1. Turn off the autotransformer.

2. Remove the jumper which bypasses the triac.

3. Connect the five-pin harmonica with the remote switch to J63. The connector should be wired as shown in Figure 3-2B.

4: Turn on the autotransformer. The power supply

should not come on.

5. Turn on the power supply using the remote switch

installed in Step 3. The power supply should come up and the waveform should look the same as in Figure 3-9. A difference in the waveforms indicates a fault in the Logical On/Off Switch or the triac.

JUST BEFORE REGULATION (LOAD ABOUT 5A TOTAL)

,

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It ·

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,~ ..

v-

-BASE DRIVE

•.

~

I INVERTER :-

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o,, f ..

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T

.... . . . .

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1

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620-0295-00 POWER SUPPLY

@

II

2A

3732-12

Figure 3-9. Inverter Waveform.

3-7

MAINTENANCE

DC SUPPLIES

1. While measuring the+ 55 V output at J74-4, adjust R591 on the Inverter board for a reading of+ 55.1 V ±100 mV.

2. Use the procedure in the Performance Check section to test the DC supplies.

Four conditions affect all supplies by causing the Control circuit to shut down the inverter or to reduce its output.

• If the+ 5 V load current exceeds its limit, + CS (current sense) causes foldback limiting at the Pulse

Width Modulator. This reduces the unregulated voltage at each regulator.

V, again the+ 5 V

• If the -12 V supply drops to current sense amplifier causes foldback limiting at

the pulse width modulator.

• If the + 5 V supply exceeds 6.0 V, SDN (shutdown) causes the Pulse Width Modulator to shut off the base drive signals.

• If the+ 12 V supply exceeds 13.5 V, again SDN causes the Pulse Width Modulator to shut off the base drive signals.

O

TIMING CIRCUIT

Use the procedure in the Performance Check section

to verify the functioning and relationship of INIT-0

(initialization) and PWRFL-0 (power failure warning).

The interval between the loss of line voltage and INIT-0 depends greatly upon the host product load and the previous line voltage. lNIT-0 may remain high for as long as two seconds.

PWRFL-0 is relatively unaffected by the host product load or the line voltage, provided that AC is present on

provide warning of low line

the line. PWRFL-0 does voltage.

not

Other overvoltage or overcurrent conditions ordinarily affect only that supply.

3-8

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620-0295-00 POWER SUPPLY

ASSEMBLY /DISASSEMBLY

MAINTENANCE

WARNING

I

The VOE Line Filter, Line Voltage Selector, and

Inverter boards are connected directly to the

lines. Turning off the host product does not disconnect the supply from the it always shut down the DC supplies on certain host products. To avoid injury or damage to components always disconnect the power cable

line before replacing components.

from the

Most components can be serviced by removing the covers over the Inverter and Regulator boards. Do not

remove the panel opposite the heat sink.

AC

I

lines nor does

AC

REPLACING THE LINE RECTIFIER (CR331)

The line rectifier bridge (CR331) can be replaced

without removing the Inverter board. Unsolder the lugs

from the front of the board and remove the bridge by

reaching into the power supply cavity.

REPLACING THE SWITCHING TRANSISTORS

NOTE

If the switching transistors have failed, CR45

and CR555 may have become leaky and should also be replaced.

7

6. Place the center leads of the transistors over their solder pads.

If you tighten the screws too much, you will break the insulator under the transistors.

7. Screw the cover in place. This presses the transistors against the insulator. Be careful not to pinch the lead from the insulator shield.

8. Solder the center leads, and then form and solder the others.

1. Remove the cover over the Inverter board.

2. Remove the cover over the switching transistors.

3. Unsolder the transistor leads.

4. Bend the leads of the new transistors until they are approximately the same shape as the old ones.

WARNING

I

Silicon grease is extremely irritating to the eyes. Handle with care and wash hands thoroughly after use.

5. Inspect the mica washer and replace it if it cracked or torn. Lightly coat the surfaces of the insulator and washer with silicon grease and remove any excess. Install the parts in the order shown in Figure 3-10.

620-0295-00 POWER SUPPLY

I

is

@

Figure 3-10. Mounting

Switching Transistors.

of

3-9

MAINTENANCE

REMOVING THE INVERTER BOARD

Refer to Figure 3-11 .

1.

Remove the cover over the Inverter board.

2. Disconnect P61 and P62. (P61 is on the rear of the board.)

3. Unsolder the gray, white, and black transformer leads where they come through board from the rear. These are marked 8, 9, and 1 O respectively on the board.

4. Unsolder Lead 11 from the board.

5. Remove the cover from the switching transistors.

6. Remove the seven screws holding the board in place and remove the board.

7. Reverse the procedure to reinstall the board. Do not overtighten the switching transistor cover or

you may break the insulator underneath.

SCREWS

LE.AD 1

SCREWS

Figure 3-11. Removing the Inverter Board.

'

3732-14

3-10

@

620-0295-00 POWER SUPPLY

MAINTENANCE

REMOVING THE REGULATOR BOARD

Refer to Figure 3-12.

1. Remove the cover over the Regulator board.

2. Disconnect P75. 5 V

3. Unscrew the transformer leads from the

diodes (CR1001, CR1002) on the heat sink.

4. Unsolder Lead C where it comes through the

board. This is the diode common.

5. Unsolder the gray, white, and black transformer leads from the

Inverter board

(Figure 3-11). These

are marked 8, 9, and 10 respectively on the board.

+

6. Return to the Regulator board. Remove the screws fastening Q60, Q75, Q80, Q85, and Q95 to the heat sink. Save the washers and mica insulators.

7. Remove the clamp holding R1001 to the heat sink.

8. Remove the two screws which fasten the power

transformer to the panel opposite the heat sink.

9. Loosen the board by removing the seven mounting

screws.

10. Unsolder Lead T (from the chassis-mounted inductor, L 1001) and pull the board off the lead.

11. Reverse the procedure to reinstall the board.

095

620-0295-00 POWER SUPPLY

Q85

080 075 SCREW 060 R1001

Figure 3-12. Removing the Regulator Board.

@

SCREWS

3732-15

3-11

MAINTENANCE

REPLACING THE +5 V RECTIFIER (CR1001, CR1002)

Before removing the diodes, note the rotation of their tops from the lines of the chassis. This angle (about 45°) makes it easier to grip the nuts while fastening or unfastening the transformer leads.

I

WARNING

Silicon grease is extremely irritating to the eyes. Handle with care and wash hands thoroughly after use.

Figure 3-13 shows the assembly of the+ 5 V rectifier diodes on the heat sink. The small nylon bushing fits inside the hole. Carefully inspect the mica washers for tears or cracks. Coat both sides lightly with silicon grease and wipe off any excess.

I

ACCESS TO THE CAVITY

To replace the + 5 V chassis-mounted inductor

(L 1001 ), the large filter capacitor (C55), or the Line Voltage Selector board, first remove the Inverter board and its support bracket in one piece.

1. Remove the cover over the Inverter board.

2. Unsolder the gray, white, and black transformer

leads from the Inverter board (Figure 3-11). These are numbered 8, 9, and 10 on the board.

3. Unsolder Lead 11 from the board.

4. Remove the cover over the switching transistors.

5. Unfasten the safety ground leads (green and

yellow) and lugs from the Inverter board bracket.

6. Unplug P61 and P62 from the Inverter board. (P61

is on the rear of the board.) Unplug P64 and P66

from the VDE Filter board.

7. Remove the six screws holding the bracket in place.

8. Reverse the procedure to reinstall the board and

bracket. Do not overtighten the cover on the switching transistors or you may break the insulator underneath.

Figure 3-13. Mounting the Diodes to the Heat Sink.

3-12

@

620-0295-00 POWER SUPPLY

Section 4

PERFORMANCE CHECK

f

1

r

The procedures in this section compare the performance of the Power Supply module with the electrical requirements given in the Specifications section. These procedures are for use with supplies which appear to

be operating properly. For troubleshooting assistance or to bring up supplies which have been repaired, refer to the Maintenance section.

The following conditions must be met in order for the

electrical requirements to be valid:

• The line supply must be 48 to 66 Hz, 115 V nominal (90 to 132 V) or 230 V nominal (180 to 264 V), with a crest factor between 1 .35 and 1 .414.

5 V supply must be between 3 A

• The load on the and 30 A. The check may be performed with the module connected to a properly functioning host product or to the test load described in the Maintenance section.

+

• The module must have been calibrated within and tested within the environmental limits described in the Specifications section.

If the performance on any test does not meet the requirement and cannot be adjusted, then repair the power supply and repeat the entire performance check.

EQUIPMENT REQUIRED

• TEKTRONIX SC 504 dual trace oscilloscope (or

equivalent).

• TEKTRONIX OM 501 voltmeter (or equivalent accu-

rate to± 0.1

• Flat blade 1 /8-inch screwdriver.

1

Requires suitable mainframe such as TEKTRONIX TM 515.

1

%

at 55 V).

1

620-0295-00 POWER SUPPLY

@

4-1

PERFORMANCE CHECK

PROCEDURES

DC VOLTAGES

Refer to Figure

1. Turn on the power supply.

2. Connect the reference lead of the voltmeter to G SENSE

3.

Referring to Table

test point indicated and compare it with the corresponding limits.

4.

If any voltage falls outside of the limits, refer to the adjustment procedure in the service manual for the host product. itself, adjust R591 on the Inverter board for a reading of+ 55.1 V +

55

4-1

(J73-3).

(If

V output at

for the location of test points.

4-1,

measure each voltage at the

the module is being checked by

±

100

mV while measuring the

J7 4-4.

Repeat Step

3.)

Table 4-1

POWER SUPPLY VOLTAGE LIMITS

Nominal Test

Voltage Point

+5 yb

-5.2 V J73-10

+ 12 V

-12 V

+ 24 V +55 vc

8

Measured to J73-3.

b5.075

Vat point ol regulation in

C55, 1

Val power supply.

J73-4

J73-1 J73-8

J74-2 J74-4

hos!

INIT-0 AND PWRFL~O

1.

Set the oscilloscope as follows:

TIME/DIV VERT MODE CH1 VOL TS/DIV CH1 COUPLING CH2 VOL TS/DIV CH2 COUPLING TRIGGER SOURCE TRIGGER COUPLING TRIGGER MODE TRIGGER SLOPE TRIGGER LEVEL

8

Range

4.85to5.15V(5V± 3%)

-4.99 to -5.41 V (-5.2 V ± 4%)

11 .64 to 1 2.36 V (1 2 V ± 3%)

-11.64 to -12.36 V (-12 V ± 3%)

23.28 to 24.72 V (24 V ± 3%)

53.90 to 56.10 V (55 V ± 2%)

product.

10

ms CHOP 2V DC 2V

DC CH1 AC AUTO

+

Midrange

4-2

Figure 4-1. Power Supply Test Points.

3732-17

@

620-0295-00 POWER SUPPLY

PERFORMANCE CHECK

2. Turn on the power supply. Test the trigger level by touching the Channel

3.

probe to+ does not trigger on contact, adjust

LEVEL SENSE.

Connect Channel

4.

5. Position the Channel 1 ground reference at the

center of the screen and position the Channel 2 ground reference one division above the bottom.

6. Set TRIGGER MODE

7. Turn the power supply OFF and then Compare the waveform with that shown in Figure

4-2. INIT-0 should remain low for at least 50 ms after+

5 V SENSE (J73-4). If

and repeat. Fasten the probe to+

to INIT

2

SINGLE SWEEP.

to

5 V SENSE

reaches its lower margin of

the oscilloscope

TRIGGER

(J73-6).

ON.

1

5 V

V.

Change the oscilloscope settings as follows:

8.

TRIGGER MODE TRIGGER SLOPE

probe to

Move the Channel

9.

Test the trigger level by touching the probe to the

pin and removing it

trigger when the probe is

TRIGGER LEVEL

PWRFL-0.

10. Turn off the power. This simulates a power failure and should trigger the oscilloscope.

Compare the waveform with that shown in Figure

PWRFL-0

4-3.

INIT-0.

age and the load on the power supply, you may

need much as 200 ms.

Because the interval varies with line volt-

adjust TIME/DIV

to

1

the oscilloscope does not

If

and repeat Fasten the probe to

should go low at least

AUTO

PWRFL-0 (J73-5).

removed,

as little as 2 ms or as

to

adjust

11

ms before

4.85

CURRENT LIMITING AND MAXIMUM LOADS

Checking performance of the current limiting circuits and operation at maximum load requires special test equipment which is not ordinarily available to customers. Consult your Tektronix Service Center for further information.

This completes the performance check.

I

21'

I,...

10·

J....-.---4.BSV

,,

+5 SENSE

_ 50mS

~-

~

10

I

0¼· ••

I I

MINIMUM

· INIT-0

.

I

•ms

~

...

.

..

.

..

.

I

21'

3732-18

Figure 4-2. Power-Up Wavefcmn.

•8

I

90

,_

O· ..

2\'

PWFL-0

..

.

. .

.

51i

.

VOLTAGE

MAXIMUM AND MINIMUM

The preceding checks may be repeated while using an autotransformer to adjust the line voltage to the minimum and maximum values given in Table 2-1. However, a complete test requires special equipment which is not ordinarily available to customers. Consult your Tektronix Service Center for further information.

620-0295-00 POWER SUPPLY

LINE

ID

OY.·

@

-

,_

'--11mS

ti-MINIMUM__.

I -I

I

···INIT-0··

I

23

Figure 4-3. Power-Down Waveform.

-

..

.

3732-19

4-3

Section 5

THEORY OF OPERATION

INTRODUCTION

The Power Supply module uses a high-efficiency, pulse-width-modulated inverter. This circuit rectifies and filters the line voltage, and then chops it at 20 kHz to couple power to the DC supplies.

Figure 5-1 is a simplified diagram of the inverter. Two switching transistors push and pull current through the inverter transformer at 20 kHz. The secondary of the inverter transformer feeds a typical full wave rectifier. An LC filter smooths the 40 kHz square waves from the rectifier.

The Control circuit regulates the+ 5 V output by varying the duty cycle of the switches between 0 and 45% each. Increasing the duty cycle raises the average voltage in the secondary.

The module contains four circuit boards:

• A VDE Line Filter board (Schematic A 1) to supplement the chassis-mounted line filter.

• A Line Voltage Selector board (Schematic A2) with two switches to select nominal line voltages of 115 or 230 volts.

• An Inverter board (Schematic A3), which contains the Primary and Control circuits.

• A Regulator board (Schematic A4), which contains the DC supplies and a timing circuit to assert

interface signals.

An interconnect diagram shows connections among the boards and the host product. Schematics A 1 and A2 for the VDE Line Filter and Line Voltage Selector boards also are on this sheet.

620-0295-00 POWER SUPPLY

Figure 5-1. Simplified Inverter Circuit.

@

5-1

THEORY OF OPERATION

DC SUPPLIES

The module provides the following voltages to the host

product:

+5V

+

12 V

+24 V

+55 V

-5.2

V

-12 V

NOTE

All DC supplies must not be fully loaded simultaneously. Table 2-1 gives the maximum load

through the power cord excluding AC for motors.

All DC grounds in the Power Supply module are floating from the chassis. This protects the chassis from corrosion by forcing current to return through the

wiring harness. Three types of ground connections are used between

the module and a common ground point in the host

product:

• GND is the power supply working ground and return for all supplies except+ 5 V.

• + 5 V RTN is a separate return for the+ 5 V, 30 A

supply.

• G SENSE (ground sense) gives voltage regulators a direct reference to ground in the host product. Since the line does not carry load current, the ground reference does not vary with changes in the load.

30A

4A

1.8 A

1.25

4A 1 A

A

SYSTEM INTERFACE SIGNALS

OFF-1 /ON-0 The host product grounds this signal

to turn on the power supply.

INIT-0

PWRFL-0

Initialization. The power supply holds this signal low for at least 50 ms after the+ 5 V supply comes into regulation.

Power failure warning. The power supply pulls this signal low at least 11 ms before the+ 5 V supply drops out of regulation.

5-2

@

620-0295-00 POWER SUPPLY

BLOCK DESCRIPTION

THEORY OF OPERATION

The block diagram (foldout) shows the major elements of the power supply: the Primary circuit, the Control circuit, and the DC supplies.

The Primary circuit consists of two line filters, a line voltage selector, a rectifier and DC filter, and two switching transistors. These are connected to the remainder of the power supply through transformers and to the chassis through a capacitor which has a 2 kV rating. This arrangement isolates line voltage from

the chassis and other circuits and provides a minimum

breakdown voltage of 1.5 kV. The Control circuit consists of a Logical On/Off switch,

a Schmitt trigger, a Pulse Width Modulator circuit, and a Base Drive circuit.

The Logical On/Off switch controls a triac on the AC

e

line. The host product controls this switch by OFF-

1 /ON-0.

• The Schmitt trigger supplies local DC to the Pulse Width Modulator and base drive. During power-up, this current comes from the Logical On/Off switch

until the 24 V supply comes up.

The Pulse Width Modulator circuit regulates the + 5

®

V supply (and provides preliminary regulation for the others) by varying the duty cycle of the switching transistors.

The Base Drive circuit amplifies these control

ti)

signals and couples them to the bases of the

switching transistors.

The DC supplies provide rectification, filtering, regulation, and overload protection. Feedback to the Pulse Width Modulator causes it to shut down if the+ 5 V or + 1 2 V supply exceeds its voltage limit and also provides foldback current limiting for the+ 5 V supply. The Timing circuit asserts power-up initialization and power failure warning signals to the host product.

620-0295-00 POWER SUPPLY

@

5-3

THEORY OF OPERATION

DETAILED CIRCUIT DESCRIPTION

PRIMARY CIRCUIT

~, -W_A_R_N_I_N_G--,1

The VOE Line Filter, Line Voltage Selector, and Inverter boards are connected directly to the AC lines. To avoid injury by electrical shock, an isolation transformer should be used during ser-

vicing of these boards. Hazardous voltages are present in the primary

circuit. After power has been disconected, the neon flasher on the Inverter board indicates that

these voltages are still present in the filter capacitors.

Refer to Schematic A2 (on same sheet as the interconnect diagram).

Line Voltage Selector

Two switches configure the primary circuit for operation from either 115 or 230 V lines.

The 115 V configuration (Figure 5-2) creates a voltage doubler by connecting N (neutral) to the C line between the filter capacitors. The four 115 VAC connectors

(J1001 through J1004) are driven in parallel directly across N and L' (the AC line on the switched side of the triac). These connectors provide power for fans and disk drives.

5-4

Figure 5-2. Configuration for the 115 V Line.

@

620-0295-00 POWER SUPPLY

THEORY OF OPERATION

The 230 V configuration (Figure 5-3) uses a capacitive voltage divider to form one side of the 115 VAC circuits for the fans and disk drives.

Refer to Schematic A3.

line Rectifier and DC Filter

Line current passes through a bridge rectifier (CR331) and

TT

filter. About 300 V appears across this network. A neon warning flasher indicates the presence of dangerous voltages. A thermistor limits in-rush current when the system is turned on.

Switching Transistors

Switching transistors 0515 and Q521 alternately push and pull current through the primary of T320. These transistors are controlled by a Pulse Width Modulator in the Control circuit and are operated in either cutoff or saturation. Their duty cycle determines the+ 5

output voltage. Two diodes (CR405 and CR414) clamp the peak reverse voltage when the field in the transformer collapses. A snubber circuit absorbs transients and minimizes ringing during off time.

620-0295-00 POWER SUPPLY

Figure 5-3. Configuration for the 230 V Line.

@

5-5

THEORY OF OPERATION

CONTROL CIRCUIT

Logical On/Off Switch

WARNING

I

Turning off the host product On/Off switch does not disconnect the Power Supply module from the AC lines nor does it always shut down the DC supplies on certain host products.

electrical shock or damage to components, do

not rely on the host system switch to remove

voltages. Disconnect the power cable from the AC line.

A triac controls the line voltage to the power supply. The OFF-1 /ON-0 signal from the host product causes the Logical On/Off switch to gate the triac via transformer coupling. This maintains isolation of the primary circuit. It also allows the host product to keep the power supply turned on until its operations are completed even though the operator has turned off the product switch. This feature is not used by all host products.

I

To

avoid

Figure 5-4 is a simplified diagram of the Logical On/Off switch. Current flows through the primary of T140

(Terminals 2 and 3) whenever the module is connected ~o the AC lines. The voltage developed in the primary induces a small voltage across Terminals 4 and 5 for the triac gate. This gate voltage depends on the state of the host product On/Off switch.

Switch OFF.

1 /ON-0 is high or floating), Q285 is forward-biased. This transistor in effect shorts the secondary of T140. The low reflected impedance causes most of the line

voltage to be dropped across the resistance in series

with the primary. R DIVIDER adjusts this resistance

according to the selected line voltage. As a result, the

voltage induced across Terminals 4 and 5 is not

sufficient to turn on the triac.

Switch ON.

is grounded), Q285 is shut off. Consequently, the

O

voltage across the secondary of T1 40 can rise to approximately 32 V. This results in sufficient voltage across Terminals 4 and 5 to turn on the triac tor each

half cycle of line voltage. The voltage across Terminals

7 and 9 also drives other portions of the Control circuit

until the 24 V supply comes up.

When the switch is off (that is, OFF-

When the switch is on (that is, OFF-1 /ON-

5-6

Figure 5-4. Logical On/Off Switch.

@

620-0295-00 POWER SUPPLY

THEORY OF OPERATION

(

Schmitt Trigger

Pulse Width Modulator

[

f

Refer to Schematic A3.

The Schmitt trigger turns on power to the Pulse Width

Modulator circuit when the output of the Logical On/Off switch charges C379 to comes up, it ordinarily holds C379 to that level. If the voltage falls below snaps off and shuts off the power supply.

21 V. Once the+ 24 V supply

11 V, however, the Schmitt trigger

REGULATOR

RT

CT

OSCILLATOR

AND

MODULATOR

5V

The Pulse Width Modulator circuit regulates the + 5 V supply by varying the on time of the switching transistors. It also provides preliminary regulation for the other supplies.

Figure 5-5 is a simplified block diagram of the Pulse Width Modulator I.C. and associated components. An oscillator alternately enables two output transistors while the error amplifier determines their duty cycles. Transistor through Pin 11 and the Base Drive circuit. Similarly, Q controls the other switching transistor (Q515) through Pin

14. The RC timing circuit is set for twice the

inverter frequency of 20 kHz.

QA controls one switching transistor (Q521)

8

{

(

620-0295-00 POWER SUPPLY

Figure 5-5. Pulse Width Modulator I.C.

@

5-7

THEORY OF OPERATION

The error amplifier compares a sample of the+ 5 voltage with a 2.5 V reference. The difference between

+ 5 V SENSE and G SENSE (ground sense) reflects the load voltage at the point of regulation in the host

product. This voltage is divided in half and applied to the inverting input. The 2.5 V REF voltage is a temperature-compensated reference for the non invert-

ing input. This reference is adjusted to calibrate the supply. The 2.5 V REF and 5 V REF (a+ 5 V reference generated in the I.C.) voltages also are used on the

Regulator board. Two other signals from the Regulator board affect

pulse width modulation. CS (current sense) causes foldback current limiting when it exceeds 200 mV. SON

(shutdown) shuts off the modulator if excessive voltage

is detected on the

+ 5 V or + 12 V supply.

A 40 kHz pulse at Pin 3 can be used to trigger an osci I loscope.

Base Drive

Refer to Schematic A3. The Base Drive circuit biases the switching transistors

through the base drive transformer (T540). The circuit

contains three active devices (Q460, Q551, and Q560) which are controlled by the output of the pulse width

modulator. Table 5-1 summarizes the four states of the

circuit.

Table 5-1

BASE DRIVE CIRCUIT STATES

Effect on

State

1

2

3

4

Q460

ON OFF OFF OFF OFF OFF

Q551

ON OFF

Q560

OFF

ON

Switching Transistors

Turns on Q521 Helps turn off Q521 Turns on Q515 Helps turn off Q515

Q460 and Q560 determine the direction of current through the primaries of the base drive and inverter transformers.

• In State 1, the Pulse Width Modulator has turned on Q460. Current flows from Terminal 2 to Terminal 3

of T540. Current induced in the secondary forward-

biases the corresponding switching transistor

(Q521).

• In State 2, the Pulse Width Modulator has shut off Q460 and turned on Q551. Two speed-up capacitors help to shut off the switching transistor. Q551

helps to collapse the field and prevents the other switching transistor from being turned on by induced voltage when the capacitors discharge.

• In States 3 and 4, the process is repeated with the other switching transistor.

DC SUPPLIES General

Figure 5-6 shows a series post-regulator circuit which

is typical of those used for all supplies except + 5 V. The + 5 V supply is regulated by feedback to the Pulse Width Modulator. The current direction in negative supplies differs from that shown in the figure.

The circuit consists of six elements:

• A Darlington pair in an emitter-follower configuration. This pass transistor causes the output voltage to follow the voltage at its base.

• A sampling network. This voltage divider feeds a sample of the output to the inverting input of an error amplifier.

5-8

@

620-0295-00 POWER SUPPLY

r

. • An error amplifier, which compares the sampled

output with a reference voltage. Falling output voltage causes the error amplifier to increase the voltage at the base of the pass transistor. This increases the load current and voltage.

• A current source, which provides additional base current. Some of the supplies do not include this element.

• A foldback current limit. As the load resistance

decreases, the supply provides additional current

until the current limit is reached (Figure 5-7). At this

point further reduction in load resistance causes

less

current to be sent to the load. The operating point moves down the characteristic curve as the load resistance is reduced to zero. This increasing sensitivity to current overload is called foldback current limiting. It reduces dissipation in the event of a short circuit. Increasing the load resistance reverses the process.

• A reverse voltage clamp, consisting of a diode.

THEORY OF OPERATION

Figure 5- 7. Foldback Current Limiting Characteristic.

Refer to Schematic A4.

Figure 5-6. Typical Post-Regulator Circuit.

620-0295-00 POWER SUPPLY

@

5-9

THEORY OF OPERATION

-5.2 V

The source of the -5.2 V supply is a full wave rectifier between Terminals 14 and 16. The inverting input to the error amplifier is taken between the -5.2 and+ 12 V supplies. The scaled voltage is close to ground potential when the supplies are operating properly.

Foldback current limiting holds the load current to less than 4.8 A. 0351 ordinarily is off. When the current

reaches its limit, the voltage drops across R76 and

R342 are sufficient to turn on 0351. This reduces the voltage at the base of 0240 and shuts off the pass transistor, thereby reducing the output. The reduced

output voltage increases the voltage across R342.

Since R342 and R76 are in series, this reduces the

load current needed to keep 0351 in the limiting mode.

Supply

+12 V Supply

The+ 12 V supply shares the windings between Terminals 3 and 4. A full wave rectifier feeds the

smoothing filter. The voltage sampling network holds the inverting input to the error amplifier close to the 2.5 V reference.

0455 provides foldback current limiting at 6 A or less. At this point, the voltage across the current sense resistor (R1 75) and R448 causes 0455 to reduce the voltage at the base of the pass transistor. As the output voltage is reduced, the increasing drop across R448 provides current foldback.

A Zener diode provides overvoltage protection. If the supply exceeds 13.5 V, current through the diode asserts SON to shut down the Pulse Width Modulator.

-12 V Supply

The -12 V supply is driven by a full-wave rectifier which shares Terminals 3 and 4 with the + 12 V supply. The sampling network scales the voltage

the output

between the -12 V output and + 2.5 REF.

is exactly -12 V, the sampling network holds the inverting input of the error amplifier at ground. Other-

wise, a change in the output voltage causes the error

amplifier to alter the voltage at the base of the pass

transistor.

Foldback current limiting keeps the output from exceeding 1 .5 A. When the load current reaches this level, the voltage drops across R75 and R243 turn on

0251. This lowers the voltage at the base of the pass transistor. The resultant drop in output voltage initiates foldback by increasing the drop across R243.

If

24 V Supply

The + 24 V supply shares a winding with the+ 55 V supply.

The supply includes a constant current source consist-

and Q436. This supplies about 3

ing of R442, VR44 mA to the base of the pass transistor. An error amplifier controls the base voltage. The inverting input to the amplifier is held at about 2.5 V by scaling a sample of the output voltage.

R86 causes current limiting at less than 2.8 A. If the current reaches this value, the drops across R86 and R466 are sufficient to turn on 0461 and reduce the voltage at the base of the pass transistor. The increas-

ing drop across R466 causes foldback limiting.

i,

5-10

@

620-0295-00 POWER SUPPLY

r

i

THEORY OF OPERATION

\

55 V Supply

Power is supplied by a full-wave rectifier across Terminals 1 and 2 of T320. A 3 mA constant current source provides base current to the pass transistor.

The error amplifier controls the base voltage through a Zener diode. This diode raises the output of the error amplifier to about 56.5 Vat minimum load. The sampling network holds the inverting input at about

2.5V.

R85 senses the load current and turns on 0271 at less than 1.6 A. R27 4 and a second constant current source

(0238) cause foldback limiting.

+5 V Supply

TIMING CIRCUIT

Initialization (INIT-0)

The INIT-0 signal goes low when the+ 5 V supply drops out of regulation and remains low for at least 50 ms after the+ 5 V comes within margin. The signal can be used to reset the host product.

The + 5 V output is sampled in the host product via+ 5 V SENSE. The divider values are such that input to the op amp equals 2.5 V REF when the+ 5 V supply reaches its lower margin of 4.85 V. At this point during power-up, the op amp begins charging C385. The RC network provides a delay of at least 50 ms. When the voltage across C385 exceeds about 4.5 V, output of the comparator goes low. This drives INIT-0 high.

The+ 5 V supply is taken from Terminals 20 and 22 of T320 with a floating return to Terminal 21. Current passes through a primary smoothing filter and a secondary hash filter. The+ 5V SENSE voltage provides feedback from the host product to the Pulse Width Modulator in the Control circuit. The supply is designed to give 5.075 V regulation in the host product.

Foldback limiting keeps the current from exceeding 37 A. The current sense amplifier compares the drop across the current sense resistor (R1001) with a reference voltage across R142. Current from + 5 V REF and the+ 55 V supply ordinarily holds the reference voltage at about 1 70 mV. When the drop across the sense resistor exceeds this amount, the amplifier drives CS (current sense) positive. If CS exceeds 200 mV, it causes the Pulse Width Modulator to reduce all output voltages. The decline in the + 55 V supply reduces the reference voltage at R1 42. This causes limiting to occur with less load current.

During power-up, a charge pump creates a negative supply for the current sense amplifier until the regulated supplies come up. This avoids a false overcurrent shutdown. The pump is driven by L SENSE

from the Logical On/Off switch. It builds a negative voltage across C251 by charging C246 through CR256

and then discharging it through CR255. A Zener diode provides overvoltage protection at 6.0 V

by sending SDN (shutdown) to the Pulse Width Modulator.

± 3% at the point of

While the+ 5 V supply is coming up,+ 5 V REF supplies voltage to the non inverting input of the comparator.

During power-down, the process is reversed except that the RC delay is much shorter. When the+ 5 V supply falls below 4.85 V, the output of the op amp goes negative and C385 discharges through the diode. This causes the output of the comparator to go high and causes INIT-0 to go low.

Power Failure (PWRFL-0)

A power failure circuit monitors the line input and pulls PWRFL-0 low if the AC is interrupted. Thus, this signal warns the host product that the DC supplies might fail.

It does not provide warning of failure due solely to low

line voltage. The circuit tests L SENSE (line sense) from the Logical

On/Off switch in the Control circuit. A divider scales L

SENSE to approximately 6 V peak and applies it to a voltage follower which charges C392 during power-up. When the capacitor reaches about 4.5 V the output of the comparator goes low and drives PWRFL-0 high.

The time constant is such that the output of the

comparator ordinarily stays low between line peaks. If the line AC fails, however, C392 discharges sufficiently to drive the output of the comparator high. This in turn causes PWRFL-0 to go low.

The+ 5 V supply remains within margin for at least 11

ms after the power failure alarm.

620-0295-00 POWER SUPPLY

@

5-11

----- --- ------------- - --- ------ -- --- -

Section 6

REPLACEABLE

ELECTRICAL PARTS

PARTS ORDERING INFORMATION

Replacement parts are available from or through your local Tektronix, Inc. Field Office

or representative.

Changes to Tektronix instruments are sometimes made to accommodate improved components as they become available, and to give you the benefit of the latest circuit improvements developed in our engineering department. It is therefore important, when ordering parts, to include the following information in your order: Part number, instrument type or number, serial number, and modification number if applicable.

If a part you have ordered has been replaced with a new or improved part, your local Tektronix, Inc. Field Office or representative will contact you concerning any change in part number.

Change information, if any, is located at the rear of this manual.

[

{

t

SPECIAL NOTES AND SYMBOLS

X000 Part first added at this serial number

00X Part removed after this serial number

ITEM NAME

In the Parts List, an Item Name is separated from the description by a colon (:). Because of space limitations, an Item Name may sometimes appear as incomplete. For further Item Name identification, the U.S. Federal Cataloging Handbook H6-1 can be utilized where possible.

ABBREVIATIONS

ACTR ASSY CAP CER CKT CIRCUIT COMP COMPOSITION SEL SELECTED CONN ELCTLT ELEC INCAND INCANDESCENT WW WIREWOUND LED NONWIR NON WIREWOUND XTAL

ACTUATOR PLSTC PLASTIC ASSEMBLY QTZ QUARTZ

CAPACITOR RECP RECEPTACLE

CERAMIC RES RESISTOR

CONNECTOR SEMICOND SEMICONDUCTOR

ELECTROLYTIC SENS SENSITIVE

ELECTRICAL VAR VARIABLE

LIGHT EMITnNG DIODE XFMR TRANSFORMER

RF

RADIO FREQUENCY

CRYSTAL

620-0295-00 POWER SUPPLY

@

6-1

REPLACEABLE ELECTRICAL PARTS

Mfr.

OOOFG OOOFJ 00213

00779 01121 01281

01295 02777

03508 04713

07263

14433 14552

14752 15454 22526 34335 50558 53944 54473 55210 55680 56289 72982 73138 75042

75915 76493

80009 90201

91637

Code

CROSS

INDEX-MFR. CODE NUMBER TO MANUFACTURER

Manufacturer

RIFA MARCOM SWITCHES INC. NYTRONICS, COMPONENTS GROUP, INC., SUBSIDIARY OF NYTRONICS, INC. AMP, INC. ALLEN-BRADLEY COMPANY TRW ELECTRONIC COMPONENTS, SEMICONDUCTOR OPERATIONS TEXAS INSTRUMENTS, INC., SEMICONDUCTOR GROUP HOPKINS ENGINEERING COMPANY GENERAL ELECTRIC COMPANY, SEMI-CONDUCTOR

PRODUCTS DEPARTMENT MOTOROLA, INC., SEMICONDUCTOR PROD. DIV. FAIRCHILD SEMICONDUCTOR, A DIV. OF FAIRCHILD CAMERA AND INSTRUMENT CORP.

ITT SEMICONDUCTORS MICRO SEMICONDUCTOR CORP.

ELECTRO CUBE INC. RODAN INDUSTRIES, INC .

. BERG ELECTRONICS, INC.

ADVANCED MICRO DEVICES ELECTRONIC CONCEPTS, INC. ELT INC., GLOW LITE DIVISION. MATSUSHITA ELECTRIC, CORP. OF AMERICA GETTIG ENG .. AND MFG. COMPANY NICHICON/AMERICA/CORP. SPRAGUE ELECTRIC CO. ERIE TECHNOLOGICAL PRODUCTS, INC. BECKMAN INSTRUMENTS, INC., HELIPOT DIV. TRW ELECTRONIC COMPONENTS, IRC FIXED RESISTORS, PHILADELPHIA DIVISION LITTELFUSE, INC. BELL INDUSTRIES, INC., MILLER, J. W., DIV. TEKTRONIX, INC. MALLORY CAPACITOR CO., DIV. OF P. R. MALLORY AND CO., INC. DALE ELECTRONICS, INC.

Address

PO BOX 35263 67 ALBANY STREET

ORANGE STREET PO BOX 3608 1201 2ND STREET SOUTH

14520 AVIATION BLVD. PO BOX 5012, 13500 N CENTRAL EXPRESSWAY 12900 FOOTHILL BLVD.

ELECTRONICS PARK 5005 E MCDOWELL RD,PO BOX 20923

464 ELLIS STREET 3301 ELECTRONICS WAY PO BOX 3049 2830 F FAIRVIEW ST. 1710 S. DEL MAR AVE. 2905 BLUE STAR ST.

YOUK EXPRESSWAY

901 THOMPSON PL. 526 INDUSTRIAL WAY WEST

BOX 698

1 PANASONIC WAY

PO BOX 85, OFF ROUTE 45

6435 N PROESEL AVENUE 87 MARSHALL ST. 644 W. 12TH ST. 2500 HARBOR BLVD.

401 N. BROAD ST.

800 E. NORTHWEST HWY 19070 REYES AVE., PO BOX 5825

PO BOX 500

3029 E. WASHINGTON STREET P. 0. BOX 372 P. O. BOX 609

City, State, Zip

MINNEAPOLIS, MN 55435

CAZENOVIA, N.Y. 13035

DARLINGTON, SC 29532 HARRISBURG, PA 17105 MILWAUKEE, WI 53204

LAWNDALE, CA 90260

DALLAS, TX 75222

SAN FERNANDO, CA 91342

SYRACUSE, NY 13201 PHOENIX, AZ 85036

MOUNTAIN VIEW, CA 94042 WEST PALM BEACH, FL 33402

SANTA ANA, CA 92704

SAN GABRIEL, CA 91776 ANAHEIM, CA 92806 NEW CUMBERLAND, PA 17070

SUNNYVALE, CA 94086 EATONTOWN, NJ 07724 PAULS VALLEY, OK 73075 SECAUCUS, NJ 07094 SPRING MILLS, PA 16875 CHICAGO, IL 60645 NORTH ADAMS, MA 01247 ERIE, PA 16512 FULLERTON, CA 92634

PHILADELPHIA, PA 19108 DES PLAINES, IL 60016

COMPTON, CA 90224 BEAVERTON, OR 97077

INDIANAPOLIS, IN 46206 COLUMBUS, NE 68601

6-2

@

620-0295-00

POWER SUPPLY

REPLACEABLE ELECTRICAL PARTS

l

Tektronix

Component No.

Al 670-7248-00 A2 670-6450-00 CKT BOARD ASSY:VOLTAGE SELECTOR A3 670-6430-00 A4 670-6429-00

Al AlJ64

Part No.

6 70- 7248-00 131-0589-00

----- -----

AlJ65 131-0589-00

----- -----

AlJ66

l~l-0589-00

----- -----

A2 A2J67 131-0589-00

A2J68 131-0589-00

670-6450-00

-----

__

----------

A2J69 131-0589-00

A2Sl

A2S2 260-1980-01

A2Wl

-----

260-1980-01 131-0566-00

Serial/Model No.

Eff

...,.

__

Dscont

Name

&

Description Code Mfr Part Number

CKT BOARD ASSY:VDE FILTER CKT BOARD ASSY:INVERTER

CKT BOARD ASSY:REGULATOR

Al VDE FILTER CKT BOARD ASSY:VDE FILTER

TERMINAL,PIN:0.46 L X 0.025

(QUANTITY OF 2) TERMINAL,PIN:0.46 L X 0.025 (QUANTITY OF 2) TERMINAL,PIN:0.46 L X 0.025 SQ,PH BRZ (QUANTITY OF 2)

A2 VOLTAGE SELECTOR CKT BOARD ASSY:VOLAGE SELECTOR

TERMINAL,PIN:0.46 L X 0.025 SQ,PH BRZ (QUANTITY OF 4) TERMINAL,PIN:0.46 L X 0.025 SQ,PH BRZ (QUANTITY OF 4)

TERMINAL,PIN:0.46 L X 0.025 SQ,PH BRZ (QUANTITY Of 4)

SWITCH,SLIDE:DPDT,10A,125V,MKD 115V/230V OOOFJ SWITCH,SLIDE:DPDT,10A,125V,MKD 115V/230V OOOFJ 4021.1913 BUS CONDUCTOR:DUMMY RES,2.375,22 AWG

SQ,PH BRZ SQ,PH BRZ

Mfr

80009 80009 80009 80009

80009

22526 22526 47350 22526

80009 22526

22526 47350 22526 47350

55210 L-2007-1

670-7248-00 670-6540-00 670-6430-00

670-6429-00

670-7248-00 47350

47350

670-6450-00

47350

4021. 1913

l

620-0295--00 POWER SUPPLY

@

6-3

REPLACEABLE ELECTRICAL PARTS

Component No.

A3Cl25 A3Cl55 A3Cl70 A3C235

A3C263

A3C281

A3C283 A3C305 A3C319 A3C355 A3C370 A3C379

A3C407 A3C435 A3C439 A3C466 A3C476 A3C533

A3C535 A3C536 A3C539 A3C571 A3C581 A3C587

Tektronix

Part No.

283-0177-00 290-0829-00 290-0829-00 285-1192-00 283-0057-00 283-0060-00

283-0067-00 285-1203-00 285-1203-00 290-0829-00 290-0829-00 290-0844-00

281-0536-00 283-0111-00 283-0194-00 283-0134-00 283-0114-00 283-0111-00

283-0194-00 283-0194-00 283-0194-00 285-0596-00 290-0534-00 283-0134-00

Serial/Model No.

Eff Dscont Name

A3 INVERTER CAP.,FXD,CER DI:1UF,+80-20%,25V

CAP.,FXD,ELCTLT:750UF,+100-10%,200V CAP.,FXD,ELCTLT:750UF,+100-10%,200V CAP.,FXD,PPR DI:0.0022UF,20%,250VAC CAP.,FXD,CER DI:0.1UF,+80-20%,200V CAP.,FXD,CER DI:100PF,5%,200V

CAP.,FXD,CER DI:0.001UF,10%,200V CAP.,FXD,PLSTC:4UF,10%,200V CAP.,FXD,PLSTC:4UF,10%,200V CAP.,FXD,ELCTLT:750UF,+100-10%,200V CAP.,FXD,ELCTLT:750UF,+100-10%,200V CAP.,FXD,ELCTLT:lOOUF,-10+75%,35 WVDC

CAP.,FXD,CER DI:1000PF,10%,500V CAP.,FXD,CER DI:0.1UF,20%,50V CAP.,FXD,CER DI:4.7UF,20%,50V CAP.,FXD,CER DI:0.47UF,+80-20%,50V CAP.,FXD,CER DI:0.0015UF,5%,200V CAP.,FXD,CER DI:0.1UF,20%,50V

CAP.,FXD,CER DI:4.7UF,20%,50V CAP.,FXD,CER DI:4.7UF,20%,50V CAP.,FXD,CER DI:4.7UF,20%,50V CAP.,FXD,PLSTC:O.OlUF,1%,lOOV CAP.,FXD,ELCTLT:1UF,20%,35V CAP.,FXD,CER DI:0.47UF,+80-20%,50V

& Description

Mfr

Code Mfr Part Number

56289

90201

OOOFG

56289 72982

72982 14752 14752 90201 90201 54473

72982 72982 72982 72982 72982 72982

72982

14752

56289

72982

273C5 PFP751SR2J392 PFP751SR2J392 PME271Y422 274Cl0 855-535U2Jl01J

835-515Bl02K C2551 C2551 PFP751SR2J392 PFP751SR2J392 ECE-A35Vl00L

301000 X5PO 102K 8121-N088Z5Ul04M 8151N057Z5U0475M 8131N087Z5U0474Z 805-509Bl52J 8121-N088Z5Ul04M

8151N057Z5U0475M 8151N057Z5U0475M 8151N057Z5U0475M

410B1Bl03F

196Dl05X0035HA1

8131N087Z5U0474Z

A3CR126 A3CR127 A3CR129 A3CR130 A3CR181 A3CR182

A3CR183 A3CR184 A3CR187 A3CR331 A3CR381 A3CR385

A3CR405 A3CR414 A3CR439 A3CR457 A3CR513 A3CR523

A3CR536 A3CR555 A3DS259 A3E205 A3E235 A3J60

A3J61

A3J62

A3J63

152-0141-02 152-0141-02 152-0141-02 152-0141-02 152-0141-02 152-0141-02

152-0141-02 152-0141-02 152-0141-02 152-0713-00 152-0333-00 152-0066-00

152-0400-00 152-0400-00 152-0066-00 152-0333-00 152-0686-00 152-0686-00

152-0066-00 152-0333-00 150-0035-00 119-0181-00 119-0181-00 131-0608-00

131-0589-00 131-0608-00 131-0608-00

SEMICOND DEVICE:SILICON,30V,150MA SEMICOND DEVICE:SILICON,30V,150MA SEMIGOND DEVICE:SILICON,30V,150MA

SEMICOND DEVICE:SILICON,30V,150MA SEMICOND DEVICE:SILICON,30V,150MA SEMICOND DEVICE:SILICON,30V,150MA

SEMICOND DEVICE:SILICON,30V,150MA SEMICOND DEVICE:SILICON,30V,150MA SEMICOND DEVICE:SILICON,30V,150MA SEMICOND DEVICE:RECT BRIDGE,SI,400V,35A SEMICOND DEVICE:SILICON,55V,200MA SEMICOND DEVICE:SILICON,400V,750MA

SEMICOND DEVICE:SILICON,400V,1A

SEMICOND DEVICE:SILICON,400V,1A SEMICOND DEVICE:SILICON,400V,750MA SEMICOND DEVICE:SILICON,55V,200MA SEMICOND DEVICE:RECT,SI,100V,5A SEMICOND DEVICE:RECT,SI,100V,5A

SEMICOND DEVICE:SILICON,400V,750MA SEMICOND DEVICE:SILICON,55V,200MA LAMP,GLOW:90V,0.3MA ARSR,ELEC SURGE:230V,GAS FILLED ARSR,ELEC SURGE:230V,GAS FILLED TERMINAL,PIN:0.365 L X 0.025 PH BRZ GOLD

(QUANTITY OF 2) TERM,PIN:0.46 L X 0.025 SQ.PH BRZ GL

( QUANTITY OF 9) TERMINAL,PIN:0.365 L X 0.025 PH BRZ GOLD

(QUANTITY OF 10) TERMINAL,PIN:0.365 L

(QUANTITY OF 5)

X 0.025 PH BRZ GOLD

01295 01295 01295 01295

01295

01295 01295

01295 01295 04713 07263

14433

80009 80009

14433 07263 80009

.80009

14433 07263 53944 80009 80009 22526

22526 47350 22526 47357 22526 47357

1N4152R 1N4152R 1N4152R 1N4152R 1N4152R 1N4152R

1N4152R 1N4152.R 1N4152R SDA10388K FDH-6012 LG4016

152-0400-00 152-0400-00 LG4016 FDH-6012 152-0686-00 152-0686-00

LG4016 FDH-6012 AlB-3 119-0181-00 119-0181-00 47357

6-4

@

620-0295-00 POWER SUPPLY

A3 INVERTER (CONT)

REPLACEABLE ELECTRICAL PARTS

(

l

r

I

f

r

Tektronix

Component No. Part No.

A3L430 A3L440 A3L569 108-0691-00 COIL,RF:l.8MH A3Qll5 151-0537-00 A3Q281 A3Q285 151-0432-00

A3Q387 151-0208-02 A3Q389 151-0188-00 A3Q460 151-0136-03 A3Q487 A3Q489 A3Q551 151-0323-00

A3Q560 151-0136-03

A3Rl03

A3Rl23 A3Rl24 A3Rl61

A3Rl85 A3Rl87

A3Rl88 315-0622-00 A3R264 A3R285 A3R286 A3R325 315-0101-00

A3R361 A3R381 A3R383 A3R386 A3R430 A3R454

A3R463

A3R477 A3R484 A3R485 A3R486 A3R488

A3R502 A3R531 308-0441-00 RES.,FXD,WW:3 OHM,5%,3W 91637 A3R532 A3R537 A3R556

A3R561 315-0331-00

A3R563 315-0331-00 RES.,FXD,CMPSN:330 OHM,5%,0.25W 01121

A3R565 315-0102-00 A3R578 315-0201-00 RES.,FXD,CMPSN:200 OHM,5%,0.25W A3R579 315-0202-00 RES.,FXD,CMPSN:2K OHM,5%,0.25W A3R587 302-0222-00 RES.,FXD,CMPSN:2.2 OHM,10%,0.50W A3R588 315-0102-00

A3R589 315-0302-00 A3R591 311-1139-00 A3RT231 A3Tl40 120-1354-00 A3T540

A3U575 156-0933-00 A3VR483

A3VR579

120-1165-00 108-0556-00

151-0342-00

151-0190-00 151-0292-00

308-0237-00 RES.,FXD,WW:8.2K OHM,5%,5W 308-0336-00 RES.,FXD,WW:7K OHM,5%,5W 315-0331-00 RES.,FXD,CMPSN:330 OHM,5%,0.25W 308-0429-00 315-0104-00

315-0203-00 316-0565-00

315-0512-00

315-0102-00

308-0429-00 315-0474-00 315-0914-00 321-0441-00 315-0100-00 308-0574-00

308-0142-00 321-0229-00 321-0412-00 321-0451-00 321-0228-00 321-0227-00

308-0218-00 315-0100-00 RES.,FXD,CMPSN:10 OHM,5%,0.25W 01121

308-0441-00 308-0574-00

307-0746-00

120-1119-01

153-0058-00 SEMICOND DVC,SE:ZENER,SEL,6.2V,5%,lOMA 152-0317-00

Serial/Model No.

Eff

Dscont

Description

TRANSFORMER,RF:TOROID,COMMON MODE COIL,RF:12UH

THYRISTOR:TRIAC,10A,400V TRANSISTOR:SILICON,PNP TRANSISTOR:SILICON,NPN

TRANSISTOR:SILICON,PNP TRANSISTOR:SILICON,PNP TRANSISTOR:SILICON,NPN,SEL

TRANSISTOR:SILICON,NPN TRANSISTOR:SILICON,NPN TRANSISTOR:SILICON,NPN,SEL

TRANSISTOR:SILICON,NPN,SEL

RES.,FXD,WW:22K OHM,1%,3W RES.,FXD,CMPSN:lOOK OHM,5%,0.25W

RES.,FXD,CMPSN:20K OHM,5%,0.25W

RES.,FXD,CMPSN:6.2K OHM,5%,0.25W

RES., FXD,CMPSN: 5·. 6M OHM, 10%, 0. 25W

RES.,FXD,CMPSN:5.lK OHM,5%,0.25W RES.,FXD,CMPSN:lK OHM,5%,0.25W RES.,FXD,CMPSN:100 OHM,5%,0.25W

RES.,FXD,WW:22K OHM,1%,3W RES.,FXD,CMPSN:470K OHM,5%,0.25W RES.,FXD,CMPSN:910K OHM,5%,0.25W RES.,FXD,FILM:383K OHM,1%,0.125W RES.,FXD,CMPSN:10 OHM,5%,0.25W RES.,FXD,WW:10 OHM,5%,2W

RES.,FXD,WW:30 OHM,5%,3W RES.,FXD,FILM:2.37K OHM,1%,0.125W RES.,FXD,FILM:191K OHM,1%,0.125W RES.,FXD,FILM:487K OHM,1%,0.125W 91637 RES.,FXD,FILM:2.32K OHM,1%,0.125W 91637 MFF1816G23200F RES.,FXD,FILM:2.26K OHM,1%,0.125W

RES.,FXD,WW:150 OHM,5%,3W 00213 1240S-150-5

RES.,FXD,WW:3 OHM,5%,3W 91637 RES.,FXD,WW:10 OHM,5%,2W 91637 RES.,FXD,CMPSN:330 OHM,5%,0.25W

RES.,FXD,CMPSN:lK OHM,5%,0.25W

RES.,FXD,CMPSN:lK OHM,5%,0.25W RES.,FXD,CMPSN:3K OHM,5%,0.25W

RES.,VAR,NONWIR:500 OHM,20%,0.50W RES.,THERMAL:5 OHM,10%,7A/DEG C

XFMR,PWR,STPDN:TRIGGER LF TRANSFORMER,RF:BASE DRIVE MICROCIRCUIT,LI:REGULATOR,PULSE WIDTH MOD

SEMICOND DEVICE:ZENER,0.25W,6.2V,5%

FROM MJE521

REJECT

Code

80009 120-116 5-00 80009 76493 03508 SC146DX176 07263 S035928 80009 151-0432-00

80009 151-0208-02 04713 SPS6868K 80009 151-0136-03 07263 S032677 80009

80009 80009 151-0136-03 91637 CW2A-70000J

01121 91637 01121

01121

01121 CB5651 01121 CB5125 01121 CB1025 01121 CB1015

91637 RS2B-B22001F 01121 CB4745 01121 CB9145 91637 MFF1816G38302F

01121 CB1005 91637 RS2Bl62KlOROOJ

91637 RS2B-K30ROOJ 91637 MFF1816G23700F 91637 MFF1816Gl9102F

91637

01121

01121 01121 01121 01121 01121

01121 73138 15454

80009 120-1354-00 80009 120-1119-01 80009 156-0933-00

80009 80009 152-0317-00

Name

Mfr

&

Mfr Part Number

108-0556-00 02279

151-0292-00

151-0323-00

CB3315 RS2B-B22001F CB1045

CB2035 CB6225

MFF1816G48702F MFF1816G22600F

CW2B-3ROOJ CB1005 CW2B-3ROOJ RS2Bl62KlOROOJ CB3315

CB3315 CB1025 CB2015 CB2025

EB2221

CB1025 CB3025

72XW-43-0-501M SG-6

153-0058-00

620-0295-00 POWER SUPPLY

@

6-5

REPLACEABLE ELECTRICAL PARTS

Tektronix

Component No.

A4 A4C54 290-0778-00 A4C55 290-0754-00 A4C95 283-0024-00

A4Cl01 283-0068-00 A4Cl02 283-0068-00

A4Cll0 290-0798-00 A4Cll5 290-0818-00 A4Cll8 290-0798-00 A4Cl25 290-0818-00 A4Cl86 A4Cl95 290-0770-00

A4Cl96 A4C218 290-0750-00 A4C246 290-0779-00 A4C247 290-0524-00

A4C251 290-0770-00

A4C285 290-0782-00 A4C291

A4C296 290-0755-00

A4C375 A4C385 283-0203-00 A4C391 290-0408-01 A4C392 285-1133-00

A4C401 283-0000-00 A4C402 283-0000-00 A4C446 290-0758-00 A4CR185 A4CR188 A4CR189 152-0066-00

A4CR221 152-0655-00 A4CR231 152-0655-00 A4CR248 152-0333-00 A4CR255 152-0333-00 A4CR256 152-0333-00 A4CR262 152-0141-02

A4CR288 152-0066-00 A4CR289 152-0066-00

A4CR341 152-0141-02

A4CR366 A4CR367 A4CR368 152-0141-02

A4CR405 152-0400-00 A4CR406 152-0400-00 A4CR414 152-0655-00 A4CR418 152-0686-00

A4CR421 152-0686-00 A4CR425 152-0655-00

A4CR431

A4CR432 152-0661-00

A4CR445 152-0061-00

A4CR485 152-0141-02

A4CR492 152-0141-02

A4J71

Part No.

670-6429-00

283-0024-00

290-0770-00

290-0844-00

290-0776-00

152-0066-00 152-0066-00

152-0141-02 152-0141-02

152-0661-00

131-2427-00

----- -----

Serial/Model No.

Eff

Dscont Name

Mfr

Description Code

&

A4 REGULATOR CKT BOARD ASSY:REGULATOR

CAP.,FXD,ELCTLT:1UF,+50-10%,50V CAP.,FXD,ELCTLT:2200UF,+75%-10%,10VDC CAP.,FXD,CER DI:0.1UF,+80-20%,50V CAP.,FXD,CER DI:O.OlUF,+100-0%,500V CAP.,FXD,CER DI:O.OlUF,+100-0%,500V

CAP.,FXD,ELCTLT:180UF,+100-10%,40V CAP.,FXD,ELCTLT:390UF,+100-10%,40V 56289 672D397H040DS5C

CAP.,FXD,ELCTLT:180UF,+100-10%,40V 56289 672D187H040DM5C CAP.,FXD,ELCTLT:390UF,+100-10%,40V 56289 672D397H040DS5C CAP.,FXD,CER DI:0.1UF,+80-20%,50V 72982 8121N083Z5U0104Z CAP.,FXD,ELCTLT:100UF,+50-10%,25V 56289 502D230

CAP.,FXD,ELCTLT:100UF,+50-10%,25V 56289 502D230 CAP.,FXD,ELCTLT:lOOUF,+50-10%,160V 56289 D76244 CAP.,FXD,ELCTLT:10UF,+50-10%,50VDC 56289 502D237 CAP., FXD,ELCTLT :4. 7UF, 20%, lOV 90201 CAP.,FXD,ELCTLT:100UF,+50-10%,25V 56289 502D230 CAP.,FXD,ELCTLT:4.7UF,+75-10%,35V 56289 503D475G035AS

CAP.,FXD,ELCTLT:lOOUF,-10+75%,35 WVDC 54473 ECE-A35VlOOL CAP.,FXD,ELCTLT:lOOUF,+50-10%,lOV 56289 502D223 CAP.,FXD,ELCTLT:22UF,+50-10%,10V 55680 10ULA22V-T CAP.,FXD,CER DI:0.47UF,20%,50V CAP.,FXD,ELCTLT:lOOUF,+50-10%,100 W,VDC 55680 lOOELAlOO CAP.,FXD,PLSTC:0.33UF,1%,100V 50558

CAP.,FXD,CER DI:0.001UF,+100-0%,500V 72982 CAP.,FXD,CER DI:0.001UF,+100-0%,500V 72982 831-516El02P CAP.,FXD,ELCTLT:2.2UF,+50-10%,160V 56289 502D227

SEMICOND DEVICE:SILICON,400V,750MA 14433 LG4016 SEMICOND DEVICE:SILICON,400V,750MA SEMICOND DEVICE:SILICON,400V,750MA 14433 LG4016

SEMICOND DEVICE:SILICON,100V,3A SEMICOND DEVICE:SILICON,100V,3A 80009 152-0655-00 SEMICOND DEVICE:SILICON,55V,200MA 07263 FDH-6012 SEMICOND DEVICE:SILICON,55V,200MA 07263 FDH-6012 SEMICOND DEVICE:SILICON,55V,200MA 07263 SEMICOND DEVICE:SILICON,30V,150MA

SEMICOND DEVICE:SILICON,400V,750MA SEMICOND DEVICE:SILICON,400V,750MA SEMICOND DEVICE:SILICON,30V,150MA SEMICOND DEVICE:SILICON,30V,150MA SEMICOND DEVICE:SILICON,30V,150MA SEMICOND DEVICE:SILICON,30V,150MA 01295

SEMICOND DEVICE:SILICON,400V,1A 80009 SEMICOND DEVICE:SILICON,400V,1A 80009 152-0400-00 SEMICOND DEVICE:SILICON,100V,3A SEMICOND DEVICE:RECT,SI,100V,5A 80009 SEMICOND DEVICE:RECT,SI,100V,5A SEMICOND DEVICE:SILICON,100V,3A

SEMICOND SEMICOND SEMICOND SEMICOND SEMICOND DEVICE:SILICON,30V,150MA TERM,QIK DISC:CKT BD,BRASS 00779 62409-1

(QUANTITY OF 2)

DEVICE:RECT,SI,600V,3A,FAST 04713 DEVICE:RECT,SI,600V,3A,FAST DEVICE:SILICON,175V,100MA DEVICE:SILICON,30V,150MA 01295

Mfr Part Number

80009 670-6429-00 54473 ECE-A50Nl 56289 432D222010AA2 72982 8121N083Z5U0104Z 56289 19C241 56289 19C241

56289

72982

14433

80009 152-0655-00

01295 14433 LG4016

14433 LG4016

01295 1N4152R

01295 1N4152R 01295

80009 152-0655-00 80009 152-0686-00

80009 152-0655-00

04713 07263 FDH2161

01295 1N4152R

6 72D187H040DM5C

TDC475M010EL

8131N075E474M

MH12D334F

831-516El02P

LG4016

FDH-6012

1N4152R

152-0400-00

152-0686-00

MR856 MR856

1N4152R

6-6

@

620-0295-00

POWER .SUPPLY

A4 REGULATOR (CONT)

REPLACEABLE ELECTRICAL

PARTS

Tektronix Serial/Model No.

Component No. Part No.

A4J72 131-2427-00

----- -----

A4J73 131-0589-00 A4J74

A4J75 A4J76 131-0608-00 A4J77 131-0608-00

A4Ll A4Ll5 A4L30 A4L65 108-1055-00 A4Ll87 A4L205 108-1056-00

A4L231 A4Q238 151-0443-00 A4Q239 151-0443-00 A4Q240 A4Q251 A4Q271 151-0250-00

A4Q351 151-0188-00 A4Q377 151-0190-00 A4Q378 A4Q436 151-0443-00 A4Q455 A4Q461 151-0190-00

A4R75 A4R76 308-0643-00 A4R85 308-0463-00 A4R86 308-0795-00

A4Rl01

A4Rl02

A4Rl41 A4Rl42

A4Rl75

A4R235 A4R241 A4R242

A4R243

A4R244 A4R261

A4R263 A4R264 A4R265

A4R266 A4R272 A4R273 A4R274 A4R276 A4R277

A4R281 A4R286 A4R287

-----

131-0589-00

-----

131-0608-00

-----

108-1057-00 108-1017-00 108-0860-00

108-0509-00

108-0978-00

151-0188-00 151-0188-00

151-0190-00 151-0190-00

308-0087-00

315-0100-00 315-0100-00

315-0101-00 321-0101-00 308-0643-00 315-0471-00 315-0271-00 321-0227-00

321-0097-00 321-0318-00 RES.,FXD,FILM:20K OHM,1%,0.125W 91637 315-0182-00 321-0231-00 315-0241-00 315-0242-00

321-0358-00

321-0347-00 322-0341-00

321-0126-00 315-0151-00 315-0101-00

315-0101-00 315-0102-00

315-0102-00

Eff

Dscont Name

TERM,QIK DISC:CKT BD,BRASS (QUANTITY OF 2) TERM,PIN:0.46 L (QUANTITY OF 10) TERM,PIN:0.46 L X 0.025 SQ.PH BRZ (QUANTITY OF 4)

TERMINAL,PIN:0.365 (QUANTITY OF 10) TERMINAL,PIN:0.365 L X (QUANTITY OF 2) TERMINAL,PIN:0.365 L X 0.025 PH BRZ GOLD 22526 (QUANTITY OF 2)

COIL,RF:FIXED,830UH COIL,RF:FIXED,lMH COIL,RF:FIXED,605UH COIL,RF:FIXED,6.lUH COIL,RF:2.45UH COIL,RF:FIXED,2.lMH

COIL,RF:FIXED,135UH TRANSISTOR:SILICON,PNP TRANSISTOR:SILICON,PNP TRANSISTOR:SILICON,PNP TRANSISTOR:SILICON,PNP TRANSISTOR:SILICON,NPN

TRANSISTOR:SILICON,PNP TRANSISTOR:SILICON,NPN 07263 TRANSISTOR:SILICON,NPN 07263 S032677 TRANSISTOR:SILICON,PNP 80009 151-0443-00 TRANSISTOR:SILICON,NPN 07263 S032677 TRANSISTOR:SILICON,NPN 07263 .S032677

RES.,FXD,WW:0.5 OHM,1%,lW RES.,FXD,WW:0.1 OHM,3%,3W RES.,FXD,WW:0.3 OHM,1%,3W RES.,FXD,WW:0.2 OHM,5%,3W RES.,FXD,CMPSN:10 0HM,5%,0.25W RES.,FXD,CMPSN:10 OHM,5%,0.25W

RES.,FXD,CMPSN:100 OHM,5%,0.25W RES.,FXD,FILM:110 OHM,1%,0.125W RES.,FXD,WW:0.1 OHM,3%,3W RES.,FXD,CMPSN:470 OHM,5%,0.25W RES.,FXD,CMPSN:270 OHM,5%,0.25W 01121 RES.,FXD,FILM:2.26K OHM,1%,0.125W

RES.,FXD,FILM:100 OHM,1%,0.125W RES.,FXD,CMPSN:l.8K OHM,5%,0.25W

RES.,FXD,FILM:2.49K OHM,1%,0.125W

RES.,FXD,CMPSN:240 OHM,5%,0.25W

RES.,FXD,CMPSN:2.4K OHM,5%,0.25W

RES.,FXD,FILM:52.3K OHM,1%,0.125W RES.,FXD,FILM:40.2K OHM,1%,0.125W RES.,FXD,FILM:34.8K OHM,1%,0.25W RES.,FXD,FILM:200 OHM,1%,0.125W RES.,FXD,CMPSN:150 OHM,5%,0.25W RES.,FXD,CMPSN:100 OHM,5%,0.25W

RES.,FXD,CMPSN:100 OHM,5%,0.25W RES.,FXD,CMPSN:lK OHM,5%,0.25W RES.,FXD,CMPSN:lK OHM,5%,0.25W

Description Code

&

00779 62409-1

X

SQ. PH BRZ

0.025

0.025 PH BRZ GOLD 22526 47357

X

L

0.025

GL 22526 47350 GL 22526 47350

PH BRZ GOLD 22526

80009 80009 80009

80009 80009

80009 80009 151-0443-00 80009 04713 04 713 80009

04713

80009

91637

91637 91637 RS2BR2000J 01121 01121 CB1005

01121

91637

91637 01121

91637

01121 91637

01121

01121 CB2425

91637

75042

91637 01121 CB1515

01121

01121 01121

Mfr

Mfr Part Number

47357 47357

108-1057-00 108-1017-00 108-0860-00

80009 108-1055-00

108-0509-00 108-1056-00

108-0978-00 151-0443-00

SPS6868K SPS6868K 151-0250-00

SPS6868K S0326 77

308-0087-00

RS2B-ER1000H

RS2B-KR3000F CB1005

CB1015

MFF1816Gll0ROF

RS2B-ER1000H

CB4715 CB2715

MFF1816G22600F

MFF1816GlOOROF MFF1816G20001F CB1825 MFF1816G24900F

CB2415

MFF1816G52301F MFF1816G40201F CEBT0-3482F

MFF1816G200ROF

CB1015

CB1025 CB1025

620-0295-00

POWER SUPPLY

@

6-7

REPLACEABLE ELECTRICAL PARTS

Tektronix Serial/Model No. Mfr

Component No.

A4R305 308-0314-00 A4R341 321-0254-00 A4R342 321-0126-00 A4R344 321-0289-00 A4R345 321-0262-00 A4R346 321-0297-00

Part No.

Eff

Dscont

A4 REGULATOR (CONT)

Name

&

Description Code Mfr Part Number

RES.,FXD,WW:680 OHM,5%,3W 91637

RES.,FXD,FILM:4.32K OHM,1%,0.125W 91637 RES.,FXD,FILM:200 OHM,1%,0.125W 91637 RES.,FXD,FILM:lOK OHM,1%,0.125W 91637 RES.,FXD,FILM:5.23K OHM,1%,0.125W RES.,FXD,FILM:12.lK OHM,1%,0.125W 91637 MFF1816Gl2101F

91637

RS2B-B680ROJ MFF1816G43200F MFF1816G200ROF

MFF1816Gl0001F

MFF1816G52300F

A4R347 315-0242-00 A4R348 315-0122-00 A4R352 A4R353 315-0163-00 A4R355 315-0152-00 A4R361 321-0327-00

A4R362 A4R364 321-0331-00 A4R365 A4R37 l A4R372 315-0471-00 A4R373 315-0332-00

A4R374 A4R381 A4R382 A4R405 308-0314-00 A4R435 305-0183-00 A4R442

A4R443 A4R444 A4R445 321-0217-00 A4R447 321-0262-00 A4R448 321-0076-00 A4R449 321-0229-00

A4R450 301-0202-00 A4R451 321-0639-00 A4R452 321-0231-00 A4R453 315-0202-00 A4R461

A4R462 315-0242-00 A4R463 321-0231-00

A4R464 321-0321-00 A4R465 321-0321-00 A4R466 A4R467 321-0321-00 A4R471 315-0203-00

315-0152-00

321-0393-00 RES.,FXD,FILM:121K OHM,1%,0.125W 91637 321-0346-00

315-0471-00

315-0332-00 315-0103-00 315-0433-00

321-0217-00 321-0217-00

315-0102-03

315-0472-00

321-0126-00

RES.,FXD,CMPSN:2.4K OHM,5%,0.25W RES.,FXD,CMPSN:l.2K OHM,5%,0.25W RES.,FXD,CMPSN:l.5K OHM,5%,0.25W RES.,FXD,CMPSN:16K OHM,5%,0.25W RES.,FXD,CMPSN:l.5K OHM,5%,0.25W 01121 CB1525 RES.,FXD,FILM:24.9K OHM,1%,0.125W 91637

RES.,FXD,FILM:27.4K OHM,1%,0.125W 91637 RES.,FXD,FILM:39.2K OHM,1%,0.125W 91637 MFF1816G39201F RES.,FXD,CMPSN:470 OHM,5%,0.25W 01121 CB4715 RES.,FXD,CMPSN:470 OHM,5%,0.25W 01121 RES.,FXD,CMPSN:3.3K OHM,5%,0.25W 01121 CB3325

RES.,FXD,CMPSN:3.3K OHM,5%,0.25W 01121 RES.,FXD,CMPSN:lOK OHM,5%,0.25W 01121 CB1035 RES.,FXD,CMPSN:43K OHM,5%,0.25W RES.,FXD,WW:680 OHM,5%,3W 91637 RES.,FXD,CMPSN:18K OHM,5%,2W RES. ,FXD,FILM: 1. 78K OHM, 1%,0.125W

RES.,FXD,FILM:l.78K OHM,1%,0.125W

RES.,FXD,CMPSN:lK OHM,5%,0.25W 01121 RES.,FXD,FILM:l.78K OHM,1%,0.125W RES.,FXD,FILM:5.23K OHM,1%,0.125W 91637 RES.,FXD,FILM:60.4 OHM,1%,0.125W RES.,FXD,FILM:2.37K OHM,1%,0.125W 91637

RES.,FXD,CMPSN:2K OHM,5%,0.50W 01121 RES.,FXD,FILM:9.6K OHM,1%,0.125W RES.,FXD,FILM:2.49K OHM,1%,0.125W RES.,FXD,CMPSN:2K OHM,5%,0.25W RES.,FXD,CMPSN:4.7K OHM,5%,0.25W 01121 RES.,FXD,CMPSN:2.4K OHM,5%,0.25W

RES.,FXD,FILM:2.49K OHM,1%,0.125W RES.,FXD,FILM:21.5K OHM,1%,0.125W RES.,FXD,FILM:21.5K OHM,1%,0.125W RES.,FXD,FILM:200 OHM,1%,0.125W RES.,FXD,FILM:21.5K OHM,1%,0.125W RES.,FXD,CMPSN:20K OHM,5%,0.25W

01121 01121 01121 01121

01121 CB4335

01121 91637

91637 91637 91637

91637 91637 01121

01121 91637

91637 91637 91637

91637 MFF1816G21501F 01121

CB2425 CB1225 CB1525 CB1635

MFF1816G24901F

MFF1816Gl2102F MFF1816G27401F

CB4715

CB3325

RS2B-B680ROJ

HB1835 MFF1816Gl7800F

MFF1816Gl7800F CB1025 MFF1816Gl7800F MFF1816G52300F MFF1816G60R40F MFF1816G23700F

EB2025 MFF1816G96000F MFF1816G24900F CB2025 CB4725 CB2425

MFF1816G24900F MFF1816G21501F MFF1816G21501F MFF1816G200ROF

CB2035

A4R472 315-0203-00 A4R473 315-0104-00

A4R481 315-0203-00 A4R482

A4R483 315-0102-00

A4R484

A4R486 321-0227-00 A4R487 A4R488 315-0102-00

A4R491 315-0203-00 A4R493 A4R494 321-0331-00

A4RT271

A4U258 156-0158-01

A4U351

315-0104-00 315-0244-00

321-0223-00

321-0385-00

307-1097-00 156-0158-01

6-8

RES.,FXD,CMPSN:20K OHM,5%,0.25W RES.,FXD,CMPSN:lOOK OHM,5%,0.25W RES.,FXD,CMPSN:20K OHM,5%,0.25W RES.,FXD,CMPSN:lOOK OHM,5%,0.25W 01121 RES.,FXD,CMPSN:lK OHM,5%,0.25W RES.,FXD,CMPSN:240K OHM,5%,0.25W

RES.,FXD,FILM:2.26K OHM,1%,0.125W RES.,FXD,FILM:2.05K OHM,1%,0.125W RES.,FXD,CMPSN:lK OHM,5%,0.25W RES.,FXD,CMPSN:20K OHM,5%,0.25W RES.,FXD,FILM:lOOK OHM,1%,0.125W RES.,FXD,FILM:27.4K OHM,1%,0.125W

RES.,THERMAL:32K OHM,2%,AT 50 DEG C 15454 MICROCIRCUIT,LI:DUAL OPERATIONAL AMPLIFIER MICROCIRCUIT,Ll:DUAL OPERATIONAL AMPLIFIER 80009

@

01121 01121 01121

01121 01121

91637 91637 01121 01121 CB2035 91637 MFF1816Gl0002F 91637

80009

620-0295-00 POWER SUPPLY

CB2035 CB1045 CB2035 CB1045 CB1025 CB2445

MFF1816G22600F

MFF1816G20500F

CB1025

MFF1816G27401F

10El04-DC-5 156-0158-01 156-0158-01

A4 REGULATOR (CONT)

REPLACEABLE ELECTRICAL PARTS

Component No.

A4U458 A4U475 A4U491 A4VR185 A4VR267 A4VR275

A4VR363 A4VR441

Tektronix

Part No.

156-0158-01 156-1226-00 156-0158-01 152-0508-00 152-0268-00 152-0195-00

152-0243-00 152-0195-00

Serial/Model No.

Eff Dscont

Description

&

Name

MICROCIRCUIT,LI:DUAL OPERATIONAL AMPLIFIER MICROCIRCUIT,LI:DUAL COMPARATOR MICROCIRCUIT,LI:DUAL OPERATIONAL AMPLIFIER SEMICOND DEVICE:ZENER,0.4W,12.6V,5% SEMICOND DEVICE:ZENER,0.4W,56V,5% SEMICOND DEVICE:ZENER,0.4W,5.1V,5%

SEMICOND DEVICE:ZENER,0.4W,15V,5% SEMICOND DEVICE:ZENER,0.4W,5.1V,5%

Mfr

Code Mfr Part Number

80009 34335 80009 80009 80009 04713

14552

04713

156-0158-01

AM319D

156-0158-01 152-0508-00 152-0268-00 SZ11755

1N965B SZ11755

620-0295-00 POWER SUPPLY

@

6-9

Component No. Part No.

Tektronix

Serial/Model No.

Eff

Dscont

Name

CHASSIS PARTS

&

Mfr

Description Code Mfr Part Number

CRlOOl 152-0642-00 CR1002 152-0642-00

F9001

159-00ll-OO

----- -----

FLlOOl 119-1435-00 LlOOl Q60

Q75 151-0657-00 Q80 Q85 Q95

Q515 Q521 RlOOl 308-0818-00 T320 120-1309-00

108-1054-00 151-0621-00

151-0656-00 151-0656-00 151-0656-00 151-0679-00

151-0679-00

SEMICOND DEVICE:RECT,SI,35V,40A,D0-5 01281 SEMICOND DEVICE:RECT,SI,35V,40A,D0-5 01281

FUSE,CARTRIDGE:3AG,6.25A,125V,5SEC

(FOR OPTION FUSE CHANGE, SEE HOST

PRODUCT SERVICE MANUAL) FILTER,RFI:10A,125/250V,60HZ 02777 COIL,RF:FIXED,20.7UH 80009 108-1054-00 TRANSISTOR:SILICON,NPN

TRANSISTOR:SILICON,PNP TRANSISTOR:SILICON,NPN TRANSISTOR:SILICON,NPN

TRANSISTOR:SILICON,NPN TRANSISTOR:SILICON,NPN 04713 SJE362

TRANSISTOR:SILICON,NPN RES.,FXD,WW:0.005 OHM,3%,lOW 91637 RHl0-65/.005 3%

XFMR,PWR,SDN

&

SU:CONVERTER,HF

75915

80009 04713 SJE1973 04713 04713 04713

04713

80009 120-1309-00

SD5218 SD5218

3136.25

F85432

151-0621-00

SJE1972 SJE1972 SJE1972

SJE362

6-10

@

620-0295-00

POWER SUPPLY

-------~

Section 7

DIAGRAMS AND SCHEMATICS

Symbols and Reference Designators

Electrical components shown on the diagrams are in the following units unless noted otherwise:

Capacitors

Resistors = Ohms (!1 ).

Graphic symbols and class designation letters are based on ANSI Standard Y32.2-1975.

Logic symbology is based on ANSI Y32.14-1973 in terms of positive logic. Logic symbols depict the logic function performed and may

differ from the manufacturer's data. Abbreviations are based on ANSI Y1.1-1972. Other ANSI standards that are used in the preparation of diagrams by Tektronix, Inc., are:

Y14.15, 1966

Y14.2, 1973 Y10.5, 1968

The following prefix letters are used as reference designators to identify components or assemblies on the diagrams.

= Values one or greater are in picofarads (pF).

Values less than one are in microfarads

Drafting Practices. Line Conventions and Lettering. Letter Symbols for Quantities Used in Electrical Science and Electrical Engineering.

(µ, F).

0

~

:u

>

:ii::

In

>

z

0

In

(')

:c

m

:ii::

~

0

In

Heat dissipating device (heat sink,

Assembly, separable or repairable

A

(circuit board, etc.) Attenuator, fixed or variable

AT B

Motor

BT Battery

Capacitor, fixed or variable

C CB Circuit breaker CR Diode, signal or rectifier DL

Delay line Indicating device (lamp)

DS E Spark Gap, Ferrite bead F Fuse

Filter

FL

The following special symbols may appear on the diagrams:

Strap or Link

H

heat radiator, etc.)

HR

Heater

HY

Hybrid circuit

J Connector, stationary portion

K Relay

Inductor, fixed or variable

L M Meter

p

Connector, movable portion

Q Transistor or silicon-controlled

rectifier R Resistor, fixed or variable RT

Thermistor

r~rri~~;~e) ________ =_···_·=_··_···_C_· _···-~2s~{\~~.__---+-1_2_v ____ l

SEL Value Selected , at Factory

Test Voltage

Internal Screwdriver Adjustment

5

I, _! -12v~_u_· _______ _

~j W

~

1

6

+12V -

R14

SEL

TP12

(-1 ) I

Jl

-----(-10.5) 1F

J

~

I / 1 I

.:.. , , 1

P13 J14

3

Switch or contactor

s

Transformer

T

Thermocouple

TC

Test point

TP

Assembly, inseparable or non-repairable

u

(integrated circuit, etc.) Electron tube

V

Voltage regulator (zener diode, etc.)

VR

w

Wirestrap or cable

y

Crystal

z

Phase shifter

Plug to E.G. Board

Box identifies Panel

Controls, Connectors and

Indicators

-~t: ,---

5

°K

Modified Component-See Parts List (depicted in grey,

or with grey outline)

Plug Index Harmonica Type Connector

(Square Pin Connector) Reference to Sheet

Number

Coaxial Connector

~

620-0295-00 POWER SUPPLY

) H I

-1 2V3 I

BOARD

@

Heat Sink Decoupled or Filtered

Voltage

Etched Circuit Board

Outlined in Black

A 2 - 3------- Sheet Number

~

Assembly Number

7-1

DIAGRAMS AND SCHEMATICS

1. True High and True Low Signals

Signal names on the schematics are followed by -1 or a -0. A TRUE HIGH signal is indicated by -1, and a TRUE LOW signal is indicated by -0.

SIGNAL -1 SIGNAL -0

= TRUE HIGH = TRUE LOW

2. Cross-References

Schematic cross-references (from/to information) are included on the schematics. The "from" reference only indicates the signal "source," and the "to" reference lists all loads where the signal is used. All from/to information will be enclosed in parentheses.

From J350 Pin 6 and To Assembly 1, Assembly 1, Sheet 5

From Sheet

6

~

(J350-6, A-15) X-1 :

(-6) Y-1 _ . ,__ _ _,.,__ XY-0 (A1 -5, 6, 7)

' INPUT SIGNAL "' OUTPUT SIGNAL

/ Sheet 5, etc.

D

(TRUE HIGH) (TRUE LOW)

3. Component Number Example

COMPONENT NUMBER

23

~

TA! ~CHEMATIC

T

ASSEMBLY Ls CIRCUIT

NUMBER SUBASSEMBLY NUMBER

CHASSIS-MOUNTED COMPONENTS HAVE NO ASSEMBLY NUMBER

PREFIX-SEE ENO OF REPLACEABLE ELECTRICAL PARTS LIST

NUMBER (IF USED)

7-2

@

I

620-0295-00 POWER SUPPLY

HOST SYSTEM

LINE

VOLTAGE

SELECTOR

BOARD

R

~

115V

OR

230V

LINE

FILTERS

IN

I

OFF

ON o!~"'\

I I

LOGICAL

ON/OFF

SWITCH

60Hz

FANS

AND

DISK

L'

.---.__C _ _,+150VDC-----

RECTIFIER

AND

FILTER

PRIMARY CIRCUIT

CONTROL CIRCUIT

RTN

-150VDC

SWITCHING

TRAN-

SISTORS

BASE

DRIVE

+55V

SUPPLY

+24V

SUPPLY

+12V

SUPPLY

-5.2V

SUPPLY

-12V

SUPPLY

+55V, 1.8A

1------------- • +24V, 1.25A

+12V, 4A

-5.2V,4A

-12V,1A

Ill

6

0

,..

C

;;:

G)

::a

>

!!:

HOST

SYSTEM

I OFFL.--1/--S-TA_R...JT-UP ____ _

ON-O POWER

I

+24V

-----..

SCHMITT

TRIGGER

I

I I

I

INVERTER BOARD

,....... __ ___.__

LO,CALDC

PULSE

WIDTH

MODULATOR

CURRENT SENSE

OVERVOL TAGE SHUTDOWN +5V SENSE

POWER SUPPL V BLOCK DIAGRAM

SWITCH I

SIGNALS

@

620-0295-00

+5V

SUPPLY

CURRENT SENSE AMP

LINE SENSE

REGULATOR BOARD

TIMING

CIRCUIT

+5V,30A

+5 RTN I

GND ~3 HOST

G SENSE z SYSTEM

L_

+5V SENSE

INIT-0 PWRFL-0

3732-32

620-0295-00 POWER SUPPLY

@

* F9001

115V

6,25A

CMEDJ

M

USEAGE

230V

3A

FCFASTJ

P65

NEUTRAL ..

LINE .. L..51

II

r---------------------------~

_____

I

I 5-4

I I ~t-=--'---~

J9001

1'

T

A1

VOE

FL1001

F9001

*

[1_ ~P64

1-1

'7

670-7248-00

LINE FILTER BO

I:• I; •

I~ o

L_j

P61

02

9

r-;-:J

P66 8-19

3

rC"il.._,

'-'----l---l---'

T

I 1 I 8-04 I 5 • I L

ni:_Je-!-'-<e--+----'"'--'"--'--'-''-fl

-

I

1

8

"'---4-"9"-'-

8-01 17°

I • I

,-,,

~

--------<:i-----0----'

------------'

_________ ,.__ ____ --4 ___ ___;_

~

2

~

3

'-f"l

-->

~

L LINE'

r c,, •••

115V

230V

S1

LINE VOLTAGE SELECTOR BO.

R DIVIDER

NEUTRAL . NEUTRAL

LI NE

W1

A2 670-6450-00

S2

P69 I

Cs7 8-04 12}

I I

4 8-04

~

31

8-02

-2 8-01

~1 I

u

P68

8-3

[=i7

31

8-3

I

~2

8-2 8-1

~1 I

I

1 /

LJ

12}

I 1'

LJ

Q

12>

1 '

LJ

u

13)

'

LJ

+12 VOLTS {: :

G SENSE ...__.

+5V SENSE ...__.

PWRFL-0 _..._.

INIT-0 _..._.

GND ...__.

-5.~1:o~~~T{

n ~~0: :}

SWITCH POSITION

115 230

LINE'

CENTER

LINE'

CENTER

I

P1003

<27 ..

~

LJ

LINE'

NEUTRAL

LINE'

NEUTRAL

I

P1002

S37 ..

>21

>-1-++-

LJ

LINE'

NEUTRAL

I I

P1001

<37 ..

~

tJ ..

NOTE 115V AC EXISTS BETWEEN PINS

I

P73

. Gl

~~

~

o-Z-:.---GND

LINE'

NEUTRAL

P1001 SW ITCH POSITION .

I :}+12 VOLTS

G SENSE +5V SENSE PWRFL-0

INIT-0

1

~5~:L::LTS

NEUTRAL

CENTER

NEUTRAL

GND

GNO

CENTER

& P1002 REGARDLESS OF

1

& 3 OF

+5 V SEN SE ...__.

G SENSE...__.

+2. 5V REF ___.._...

REF___.._...

+5V

GNO ...__.

OFF-1 /ON-0 ...__.

+CS...__.

SON...__.

VOLTS...__.

+24

SENSE ___.._...

L

INVERTER BO.

TEST

INPUTS

~ a-----.

{

~

_____. -cs

a-----. +24 VOL TS

~a-----. GND

+CS

.. ~ a-----. OFF-1/0N-0

670-6430-00

A3

L-----------~ERSUPPLYMo •fil ___________ J

621Zl-1Zl295-1Zl0 @

3732-1

21 31 41

sl

61 71

sl

POWER

1-N 2-N 3-N 4-N 5-N 6-N 7-N 8-N 9-N 0-N

SWITCH { ..

~

12

_____._ G SENSE

13

a-----. +2 . 5V REF

14

a-----. +5V REF

Is

_____._ GND

16

_____._ +CS

17

_____._ OFF-1/0N-0

Is

_____._ SON

lg

_____._ +24 VOL TS

I 10

a-----. L SENSE

L_j

P76 _SPADE;)

;16 a-----. DFF-1 /ON-0 I

a-----{> J71

LJ SPADE;)

A4 670-6429-00 REGULATOR BO.

670-7248-00 670-6450-00

+24 VOL TS { :

+5 VOL TS ..

+5V RTN ..

LINE

GND ...__.

+55 VOL TS _..._.

T SPADE )

! SPADE;)

VOE LINE

VOLTAGE

I~ _____._ +5V SENSE

=-~

J72

~

.. GND

~

I : } +24 VOLTS

~

.. +55 VOL TS

FILTER

SELECTOR

BO

A1-1 A2-1

I I

'

Inverter (670-6430-00) Component Location.

@

3732-30

620-0295-00 POWER SUPPLY

24 V External DC to Control Circuit

+ 5 V Current limiting disabled

Line AC OFF

Same as above

0

l}IS

'-

"'

-

. _L;-

1',I.

3732-8

,..,

-~

. ...

L ~•

J,

1«13

'

~

--

I

.

T.

f •

. . . . . . ~ . . .

~

! "'--

n......

---

. . . . . . . .

r..-- . r"'··

s V

'

-

10--+-......,.....+--+--+----t--+--+----+---+--'---f-

l

0¾••~· ••.•.••••• ,. •"••· ................... ~.

Basic Drive Waveform.

)V

si

00• .

.....

I '

9

~

-

J../

~

/

-~

. . . .

n~-

U I

I

•

7

/

1

~

. . . . . . . .

• J

. . . .

...,j

-

. -

,...

l ...

..

--

II'

. . .

....

(8 D'LAYD)

~

+ 5 V current limiting disabled. Watch for current

greater than 4A (2 divisions).

Taken just before supply with load of about SA total.

came into regulation

CURRENT

PROBE 2A/DIV

0

;;:.4.3µ,S

I t

3732-9

Inverter Dead Time.

JUST BEFORE REGULATION (LOAD ABOUT 5A TOTAL)

1C

¥

100·

L-·

I

g'l,,

-

-BASE DRIVE

-

{INVERTER}-

1

11_ I

0¾• f, .

2A

,.,. ...

~

-"

.. ., .

. . . .

v-

-

'

-

. . . . . . . .

Inverter Waveform.

,,

J

L

. . . .

-

. . . .

Wf

14

~~

. ... . ... . .

~n

I

r

.... . ...

-

....

~

-

l

.. r-

3732-12

z

<

m

:a

!il

CENTER

R DIVIDER

+24 VOLTS

+24 VOL TS

P61

~a-=C~--...----------<,--------------------------,

•

----+----------------------+------------------------------------------------

R124

330

•~

"I

·r ~:_::=-------- :~:~,

:::I

P63

•~

~I

----n------41-------------------

•~

1¥

CR385

C379+

100uFi

R103

8.2K

R123 7K

---1

HMITT.TRIGGER

E

----

R386 383K

Q487

-----~

CTIFIER AND

G

-----

.C. FILTER

•

R325

100

~-------------3=--

Q460

Q551

__

T540

I

I• 10

I

g

I

I 7

I

I I

I

I I I 6

_____ _

_.....

CR523

C536

4.7uF

C439

4.7uF

C535

"l.7uF

C533

--f------+-+--+---+--"---

0. 1 uF

R430 10

C435

luF

0.

CR414

1000

0

C235

22001

R502 150

C407

P61

LINE'

•

~

~•

8

*T320 IS SHOWN ON

NEUTRAL

*

T320

I I I I I I

REGULATOR

670-6429-00

BO.

OFF-1 /ON-0

•~

P63

•~

621Zl-1Zl295-1Zl1Zl

R185

100K

R285

Q285

R187

20K

5.1K Q281

R188

6.2K

R484

191K--

@

3732-2

670-6-+30-00

•

INVERTER B D .

t:

~

Dyl

L SENSE

A3-1

OI

-.i-

oz

•<

Olm

"":a

W-1

Om

c,::11

0

Regulator (670-6429-00) Component Location.

3732-31

@

620-0295-00 POWER SUPPLY

+ C218

i100uF

Q239

Q9~H P74

J,---e--'V\Ar___.--------------

R85

0,3n

R274

200

CR289

+ C391

i100uF

~

•

e55 VOL

TS

Q238

--.------~H __,,___,

H35

18K

._,L30 ___,_,

605uH

3

+ C115

i390uF

CR421

Q85

1r---.---'\1V\~---+-----..----.----<1>---

R273

34.BK

CR288

I

J

+ C291

i100uF

g

•

.._---1

~Ll-.

LJ

I

P75

~

1

-y--

P73

C"""i7

g

3

2

• I

2

:>

I

:>

I

+24 VOL

GND

+24 VOL

+ 1 2 VOL

TS

R244

20,0K

+12V

U475B

LM319

CR485

C375T

22uF

'v

+5V REF

CR366

CR368

R372

470

P73

~. INIT-0

• PWRFL-0

~

P75

~. OFF-1/0N-0

2-3

e70-e42g-00REGULA TOR

BO

A4-1

Section 8

REPLACEABLE

MECHANICAL PARTS

f

t

i

PARTS ORDERING INFORMATION

Replacement parts are available from or through your local

Tektronix, Inc. Field Office or representative.

Changes to Tektronix instruments are sometimes made to

accommodate improved components as they become available, and to give you the benefit of the latest circuit improvements developed in our engineering department. It is therefore

important, when ordering parts, to include the following

information in your order: Part number, instrument type or

number, serial number, and modification number if applicable.

If a part you have ordered has been replaced with a new or improved part, your local Tektronix, Inc. Field Office or representative will contact you concerning any change in part number.

Change information, if any, is located at the rear of this manual.

SPECIAL NOTES AND SYMBOLS

XOOO Part first added at this serial number

oox

Part removed after this serial number

FIGURE AND INDEX NUMBERS

Items in this section are referenced by figure and index numbers to the illustrations.

INDENTATION SYSTEM

This mechanical parts list is indented to indicate item relationships. Following is an example of the indentation system used in the description column.

1 2 3 4 5

Name & Description

Assembly and/or Component Attaching parts for Assembly and/or Component

.

--- ---

Detail Part of Assembly and/or Component

Attaching parts for Detail Part

.

--- ---

Parts of Detail Part

Attaching parts for Parts of Detail Part

.

--- ---

Attaching Parts always appear in the same indentation as

the item it mounts, while the deta_il parts are indented to the right.

Indented items are part of, and included with, the next higher indentation. The separation symbol - - - • - -- indicates the end of attaching parts.

Attaching parts must be purchased separately, unless otherwise specified.

ITEM NAME

In the Parts List, an Item Name is separated from the

description by a colon (:). Because of space limitations, an Item

Name may sometimes appear as incomplete. For further Item Name identification, the U.S. Federal Cataloging Handbook H6-1

can be utilized where possible.

l

#

ACTR ADPTR ADAPTER

ALIGN ALIGNMENT AL ALUMINUM ASSEM ASSEMBLED ASSY ASSEMBLY ATTEN ATTENUATOR AWG AMERICAN WIRE GAGE BD BOARD BRKT BRACKET BAS BRASS BRZ BRONZE BSHG BUSHING CAB CABINET CAP CAPACITOR GER CERAMIC CHAS CKT CIRCUIT COMP COMPOSITION CONN CONNECTOR GOV COVER CPLG COUPLING CRT DEG DEGREE DWR DRAWER

INCH NUMBER SIZE ACTUATOR

CHASSIS

CATHODE RAY TUBE

620-0295~00 POWER SUPPLY

ABBREVIATIONS

@

IN

MACH

NON WIRE OBD OD OVH PH BRZ PL PLSTC PN PNH PWR RCPT RES RGD RLF

RTNR SCH SCOPE

ELCTRN ELECTRON ELEC ELECTRICAL JNCAND ELCTLT ELEM ELEMENT INTL EPL ELECTRICAL PARTS LIST LPHLDR EQPT EXT EXTERNAL MECH FIL FILLISTER HEAD MTG FLEX FLEXIBLE NIP FLH FLAT HEAD FLTR FILTER

FR FRAME or FRONT FSTNR FT FOOT FXD FIXED GSKT GASKET HDL HANDLE HEX HEXAGON HEX HD HEXAGONAL HEAD HEX SOC HEXAGONAL SOCKET HLCPS HELICAL COMPRESSION HLEXT HELICAL EXTENSION HV HIGH VOLTAGE IC INTEGRATED CIRCUIT ID INSIDE DIAMETER IDENT IMPLR

ELECTROLYTIC INSUL

EQUIPMENT

FASTENER

IDENTIFICATION IMPELLER SCR

INCH INCANDESCENT INSULATOR INTERNAL LAMPHOLDER MACHINE MECHANICAL MOUNTING SLFLKG NIPPLE NOT WIRE WOUND

ORDER BY DESCRIPTION

OUTSIDE DIAMETER OVAL HEAD PHOSPHOR BRONZE PLAIN or PLATE PLASTIC PART NUMBER PAN HEAD POWER RECEPTACLE RESISTOR RIGID RELIEF

RETAINER SOCKET HEAD OSCILLOSCOPE SCREW

SE SECT SECTION SEMICOND SEMICONDUCTOR SHLD SHLDR SKT SOCKET SL SLIDE

SLVG SLEEVING SPR SPRING SQ SST STL STEEL SW T TUBE TERM TERMINAL THO THK THICK TNSN TENSION TPG TAPPING TRH TRUSS HEAD V VOLTAGE VAR VARIABLE

WI WITH

WSHR XFMR TRANSFORMER XSTR TRANSISTOR

SINGLE END

SHIELD SHOULDERED

SELF-LOCKING

SQUARE STAINLESS STEEL

SWITCH

THREAD

WASHER

8-1

REPLACEABLE MECHANICAL PARTS

CROSS INDEX-MFR. CODE NUMBER TO MANUFACTURER

Mfr. Code

S3629 00779 08261 08530 12703

22526 22670 24931

27264 59730 73743 77250

78189 80009

83385 86044 86445 86928 93907

Manufacturer

PANEL COMPONENTS CORP. AMP, INC. SPECTRA-STRIP CORP. RELIANCE MICA CORP. JUDD WIRE DIV. ELECTRONIZED CHEMICALS CORP. BERG ELECTRONICS, INC. G.M. NAMEPLATE, INC. SPECIALITY CONNECTOR CO., INC. MOLEX PRODUCTS CO. THOMAS AND BETTS COMPANY FISCHER SPECIAL MFG. CO. PHEOLL MANUFACTURING CO., DIVISION OF ALLIED PRODUCTS CORP.

ILLINOIS TOOL WORKS, INC. SHAKEPROOF DIVISION

TEKTRONIX, INC.

CENTRAL SCREW CO. CALIFORNIA GASKET COMPANY

PENN FIBRE AND SPECIALTY CO., INC.

SEASTROM MFG. COMPANY, INC.

TEXTRON INC. CAMCAR DIV

Address

2015 SECOND ST.

PO BOX 3608

7100 LAMPSON AVE. 342-39TH ST.

250 TURNPIKE RD P.O. BOX 390

YOUK EXPRESSWAY

2040 15TH AVENUE WEST 2620 ENDRESS PLACE 5224 KATRINE AVE. 36 BUTLER ST. 446 MORGAN ST.

5700 W. ROOSEVELT RD. ST. CHARLES ROAD

PO BOX 500

2530 CRESCENT DR. 1601 W. 134 STREET

2032 E. WESTMORELAND ST.

701 SONORA AVENUE 600 18TH AVE

City, State, Zip

BERKELEY, CA 94170 HARRISBURG, PA 17105 GARDEN GROVE, CA 92642

BROOKLYN, NY 11232 TURNERS FALLS, MA 01376

NEW CUMBERLAND, PA 17070

SEATTLE, WA 98119

GREENWOOD, IN 46142

DOWNERS GROVE, IL 60515

ELIZABETH, NJ 07207

CINCINNATI, OH 45206

CHICAGO, IL 60650

ELGIN, IL 60120

BEAVERTON, OR 97077

BROADVIEW, IL 60153

GARDENA, CA 90249

PHILADELPHIA, PA 19134

GLENDALE, CA 91201

ROCKFORD, IL 61101

8-2

@

620-0295-00

POWER SUPPLY

REPLACEABLE MECHANICAL PARTS

f

I

l

I

l

Fig. & Index No.

1- 620-0295-00

Tektronix Serial/ Model No.

1 2 3 4 5

Part No.

-1

200-2455-00

-2

211-0504-00 2 SCREW,MACHINE:6-32 X 0.25 INCH,PNH STL

-3 211-0510-00 3 SCREW,MACHINE:6-32 X 0.375,PNH,STL,CD PL

Eff

Dscont

Qty

POWER SUPPLY:LOW VOLTAGE

1

LOWER,PWR SPLY:LEFT,AL

1

Name & Description Code

(ATTACHING PARTS)

- - - * - - -

-4 200-2456-00

-5 211-0504-00 3

-6 211-0510-00

LOWER,PWR SPLY:RIGI!J,AL

1

SCREW,MACHINE:6-32 X 0.25 INCH,PNH STL

SCREW,MACHINE:6-32 X 0.375,PNH,STL,CD PL

3

(ATTACHING PARTS)

- - - * - - -

-7 175-3379-00

-8 131-0707-00 175-0833-00 AR CABLE,SP,ELEC:10,26 AWG STRD,PVC JKT,RBN

-9 352-0168-03

-10

----- -----

-11 211-0097-00

-12

210-1291-00

-13

342-0328-00

-14 343-0870-00

-15

211-0016-00

CA ASSY,SP,ELEC:10,26 AWG,7.0 L,RIBBON

1

. CONNECTOR,TERM.:22-26 AWG,BRS& CU BE GOLD

10

. HLDR,TERM CONN:10 WIRE,ORANGE

2 5 5

5 5

1 1

(A3P62 TO A4P75)

TRANSISTORS:(SEE Q60,75,80,85,95 REPL) SCREW,MACHINE:4-40 X 0.312 INCH,PNH STL

WASHER,SHLDR:0.118 ID X 0.1 THK,PLSTC

INSULATOR,PLATE:XSTR,ALUMINUM CLAMP,RESISTOR:ALUMINUM

SCREW,MACHINE:4-40 X 0.625 INCH,PNH STL

(ATTACHING PARTS)

---*---

(ATTACHING PARTS)

- - - * - - -

-16 198-4300-00

-17

----- -----

-18 131-0707-00

-19 352-0169-04

----- -----

-20

---------- 1

-21 211-0244-00

WIRE SET,ELEC:

1 1 2 1

7

RESISTOR:(SEE RlOOl REPL) . CONNECTOR,TERM.:22-26 AWG,BRS& CU BE GOLD . CONN BODY,PL,EL:2 WIRE YELLOW

(A4P77)

CKT BOARD ASSY:REGULATOR(SEE A4 REPL)

(ATTACHING PARTS)

SCR,ASSEM WSHR:4-40 X 0.312,PNH STL CD PL

- - - * - - -

----- -----

-22

----- -----

-23

211-0003-00 210-0001-00

-24

210-0405-00

-25 ----- -----

----------

-26

211-0003-00 210-0001-00

-27

210-0405-00 195-1207-00

2

2 2 WASHER,LOCK:INTL,0.092 ID X 0.18"0D,STL 2

1

1 1 1

1

REGULATOR BOARD ASSY INCLUDES:

COIL:(SEE A4Ll,A4L205 REPL)

(CORE MUST NOT TOUCH PAD)

SCREW,MACHINE:2-56 X 0.875 INCH,PNH,STL

NUT,PLAIN,HEX.:2-56 X 0.188 INCH,BRS COIL:(SEE A4L231 REPL)

(CORE MUST NOT TOUCH PAD)

SCREW,MACHINE:2-56 X 0.875 INCH,PNH,STL

WASHER,LOCK:INTL,0.092 ID X 0.18"0D,STL

NUT,PLAIN,HEX.:2-56 X 0.188 INCH,BRS

LEAD,ELECTRICAL:12 AWG,3.5 L,2-N

(ATTACHING PARTS)

- - - * - - -

(ATTACHING PARTS)

---*---

----- ----- (J72 TO A4C55)

195-1592-00

LEAD,ELECTRICAL:12 AWG,5.0 L,0-N 80009

1

----- ----- (J71 TO A4C55)

-28

----------

-29

212-0507-00 2 SCREW,MACHINE:10-32 X 0.375 INCH, PNH STL

-30 343-0869-00

-31

----- -----

-32 211-0688-00

-33

210-0333-00 2

-34

211-0504-00

-35 210-0457-00

1

1 1

2

2 2

CAPACITOR:(SEE A4C55 REPL)

CLAMP,XFMR:3.125 L,AL TRANSFORMER:(SEE T320 REPL)

SCREW,MACHINE:6-32 X 3.0,PNH,STL CD PL

TERMINAL LUG:0.255 ID,BRASS,TIN PLATED

SCREW,MACHINE:6-32 X 0.25 INCH,PNH STL

NUT,PL,ASSEM WA:6-32 X 0.312 INCH,STL

(ATTACHING PARTS)

- - - * - - -

(ATTACHING PARTS)

---*---

(ATTACHING PARTS)

- - - * - - -

Mfr

Mfr Part Number

80009 620-0295-00 80009 200-2455-00

83385 OBD

83385 80009 200-2456-00 83385 OBD

83385 OBD 80009

22526 08261 SS-1026-7 80009 352-0168-03

83385 OBD 80009

80009

80009 343-0870-00 83385 OBD 80009 198-4300-00 22526 47439

80009 352-0169-04

78189 OBD

83385 OBD 78189 1202-00-00-0541C 73743 2Xl2157-402

83385

78189 1202-00-00-0541C 73743

80009 195-1207-00

83385 80009 343-0869-00

93907 OBD

86928 5411-38

83385 83385

OBD

175-3379-00

47439

210-1291-00 342-0328-00

OBD

2Xl2157-402

195-1592-00

OBD

OBD OBD

620-0295~00 POWER SUPPLY

@

8-3

REPLACEABLE MECHANICAL PARTS

Fig.

&

Index Tektronix No.

1-36

Part No.

407-2476-00

-37 2ll-0504-00

-38

2ll-0510-00

-39 200-2269-00

-40 2ll-0551-00

-41

----- -----

-42

342-0458-00

-43

342-0449-01

-44

----- -----

-45

2ll-0244-00

Serial/Model No.

Eff

Dscont

----- -----

-46

----- -----

-47 2ll-05ll-OO

-48

210-0005-00

-49 210-1270-00

-50 210-0457-00

-51

214-2955-00

-52

214-2956-00

-53 343-0937-00

-54

407-2475-00

-55 2ll-0504-00

-56 2ll-0510-00

-57 334-3379-02 195-1040-00

----- -----

-58

210-0202-00

-59 2ll-0503-00

-60

-----

-61

2ll-0504-00

-62

198-4298-00

-63

352-0205-00

----- -----

-64

131-0792-00

-65

352-0203-00

----- -----

-66

352-0199-00

----- -----

-67 175-2817-00

-68

175-1517-00

-69

343-0549-00

-70 198-4343-00

-71 131-0621-00

-72 352-0200-00

----- -----

-73 352-0201-00

----- -----

-74 131-0945-00

-75 204-0884-00

----- -----

-76

131-0948-00

-77

204-0826-00

----- -----

Qty

1 2 3 4 5

BRACKET,SUPPORT:REGULATOR,AL

1

SCREW,MACHINE:6-32 X 0.25 INCH,PNH STL

3

SCREW,MACHINE:6-32 X 0.375,PNH,STL,CD PL

4

COVER,XSTR:

1 2 SCREW,MACHINE:6-32 X 0.562 INCH,PNH

TRANSISTOR:(SEE Q515,Q521 REPL)

2

INSULATOR,PLATE:TRANSISTOR,MICA

1

INSULATOR,PLATE:TRANSISTOR,ALUMINA,PRINTED

1

CKT BOARD ASSY:INVERTER(SEE A3 REPL)

1

SCR,ASSEM WSHR:4-40 X 0.312 INCH,PNH STL

7

INVERTER BOARD ASSY INCLUDES:

1 1 SCREW,MACHINE:6-32 X 0.500,PNH,STL,CD PL 83385 OBD

2

1

1 1 1

1 3

3

2

1 1

2

1

2

TRANSISTOR:(SEE A3Qll5 REPL)

WASHER,LOCK:EXT #6 78189 ll06-00

WASHER,FLAT:0.141 ID X 0.04 THK,AL

NUT,PL,ASSEM WA:6-32 X 0.312 INCH,STL 83385 OBD HEAT SINK,XSTR:T0-220,AL

HEAT SINK,XSTR:T0-220,AL

RETAINER,CAP.:POLYURETHANE

BRACKET,SUPPORT:INVERTER,AL SCREW,MACHINE:6-32 X 0.25 INCH,PNH STL 83385

SCREW,MACHINE:6-32 X 0.375,PNH,STL,CD PL 83385 OBD

MARKER,IDENT:MARKED GROUND SYMBOL LEAD,ELECTRICAL:18 AWG,4.0 L,5-4

(GROUND TO FLlOOl) . TERMINAL,LUG:0.146 ID,LOCKING,BRZ TINNED 78189 2104-06-00-2520N

SCREW,MACHINE:6-32 X 0.188 INCH,PNH STL CKT BOARD ASSY:VDE(SEE Al REPL) SCREW,MACHINE:6-32 X 0.25 INCH,PNH STL 83385 OBD

Name

&

Description

(ATTACHING PARTS)

- - - * - - -

(ATTACHING PARTS)

---*---

(ATTACHING PARTS)

- - - * - - -

(ATTACHING PARTS)

- - - * - - -

(ATTACHING PARTS)

- - - * - - -

(ATTACHING PARTS)

Code Mfr Part Number

80009 83385

83385 OBD 80009 200-2269-00

STL 83385 OBD

08530 80009 342-0449-01

78189 OBD

80009

80009 80009 214-2956-00 80009 80009 407-2475-00

80009 334-3379-02 80009 195-1040-00

83385

407-2476-00 OBD

OBD

210-1270-00

214-2955-00 343-0937-00

OBD

- - - * - - -

WIRE SET,ELEC: 80009 198-4298-00

Mfr

1 1

12

1 1 1

1 2 1

8

1 1

2

1

7 2

CONN BODY,PL,EL:9 WIRE BLACK (A3P61) CONNECTOR,TERM:18-20 AWG,CU BE GOLD PL 22526 46221 HLDR,TERM CONN:7 WIRE BLACK 80009 352-0203-00 (A2P67)

CONN BODY,PL,EL:3 WIRE BLACK 80009 352-0199-00

(AlP66) CABLE,SP,ELEC:2,18 AWG,W/GRAY JACKET 12703 MK02UT CABLE ASSY,RF:50 OHM COAX,20.0 L 80009 175-1517-00

STRAP,TIEDOWN:0.091 W X 3.62 INCH LONG 59730

WIRE SET,ELEC: 80009 198-4343-00

CONNECTOR,TERM:22-26 AWG,BRS& CU BE GOLD 22526 46231 HLDR,TERM CONN:4 WIRE BLACK

(A2P68) CONN BODY,PL,EL:5 WIRE BLACK 80009 352-0201-00

(A2P69) CONTACT,ELEC:CONNECTOR,BRASS TIN PL 27264 02-09-2103 CONN BODY,PLUG:3 CONTACT,MALE (Pl002 TO B1002 ON 4112) CONTACT,ELEC:CONNECTOR,BRASS TIN PL CONN BODY,RCPT:2 CONT,FEMALE 27264 (Pl003,Pl004 TO Bl003,Bl004 ON 4112)

80009 352-0205-00

TY23M

80009 352-0200-00

27264 27264

03-09-2031 02-09-ll03

03-09-1021

8-4

@

620-0295-00

,_

POWER SUPPLY

r

I

r

l

f

Fig.

&

Index Tektronix Serial/Model No.

No. Part No.

1-78

204-0734-00

-----

-79

-80

-81

-82

-83

-84

-85

-86

-87

-88

-89

-90

-91

-92

-93

-94

-95

-96

-97

-98

-99

-100

-101

-102 214-3022-01

-103 386-4331-00

-----

210-0202-00 343-0549-00

-----

210-0285-00 210-1286-00 210-1115-00 210-0853-00 210-0412-00

-----

211-0530-00 343-0871-00

----- -----

211-0016-00 166-0033-00

334-3918-00 200-2264-00 204-0832-00 210-1039-00

-----

211-0198-00 210-0586-00

198-4476-00 131-0792-00 352-0199-00

-----

Eff

Dscont

REPLACEABLE MECHANICAL PARTS

Qty

1 2 3

4

5 Name

CONN

BODY,RCPT:3 CONTACTS

(PlOOl)

. TERMINAL,LUG:0.146 ID,LOCKING,BRZ 1 2 DIODE:(SEE CR100l,CR1002 REPL)

2 4 WASHER,FLAT:0.25 ID X 0.002 THK,MICA 2 2 WASHER,FLAT:0.25 ID X 0.50 OD 2

1 COIL:(SEE LlOOl REPL)

1 1 CKT BOARD ASSY:V SELECTOR(SEE A2 REPL) 2 2 SPACER,SLEEVE:0.375 L X 0.18 ID,AL

1 1 1 1 WASHER,LOCK:INT,0.521 1 FILTER,RFI:(SEE FLlOOl REPL)

2 SCREW,MACHINE:4-40 X 0.438 PNH,STL,POZ 2

1 WIRE SET,ELEC: 2 . CONNECTOR,TERM:18-20 AWG,CU BE 1 . CONN BODY,PL,EL:3 WIRE BLACK

1 HEAT SINK,ELEC:POWER SUPPLY,ALUMINUM 1 SUPPORT,PWR SPLY:FRONT,AL

STRAP,TIEDOWN:0.091 W X 3.62 INCH

(ATTACHING PARTS)

TERMINAL, LUG: WASHER,FLAT:0.27 ID X 0.062 THK,0.37 OD NUT,PLAIN,HEX.:0.25-28 X 0.438,BRS

- - - * - - -

(ATTACHING PARTS)

SCREW,MACHINE:6-32 X 1.75 INCH,PNH CLAMP,MOUNTING:POT COIL,AL

- - - * - - -

(ATTACHING PARTS)

SCREW,MACHINE:4-40 X 0.625 INCH,PNH

- - - * - - -

MARKER,IDENT:MKD CAUTION

CAP,FUSEHOLDER:3AG FUSES BODY,FUSEHOLDER:3AG,5 X 20MM FUSES

(ATTACHING PARTS)

NUT,PL,ASSEM WA:4-40 X 0.25,STL CD PL

- - - * - - -

(AlP64)

&

Description Code

TINNED LONG

CD PL

STL

ID X 0.625 INCH OD

GOLD PL

Mfr

Mfr Part Number

27264 03-09-1031 78189

59730

D0779 86928 5624-72-2 86445 OBD 86044 OBD 73743 3091-402

83385 OBD 80009 343-08 71-00

83385 OBD 80009 166-0033-00

22670 OBD S3629 03111666(MDLFEU) S3629 031.1673(MDLFEU) 24931 OBD

77250 OBD 83385 OBD

80009 198-4476-00 22526 46221 80009 352-0199-00

80009 80009 386-4331-00

2104-06-0D-2520N

TY23M

321051

214-3022-01

i

I

620-0295-00 POWER SUPPLY

(<iJ

8-5

103,,-----1

@

620-0295-00 p

OWER SUPPLY

Appendix A

SIGNAL DEFINITIONS AND REFERENCES

Signal Name

+2.5 VREF

+5 V REF

+ 5 V SENSE Host

Source

(Schematic) (Schematic)

A3

Destination Description

A4

A4 A3

cs

G SENSE Host

A4

GND Host

A4

INIT-0 A4 Host

L SENSE

A3 A4

A3 Output of+ 5 V current sense amplifier to Pulse Width

A4

A3 product.

A4

A3

Temperature compensated reference for Pulse Width

Modulator and most other regulators. Adjust this to

calibrate the supplies. A local reference generated by the Pulse Width

Modulator.

Samples+ 5 voltage at point of regulation in the host product.

Modulator. Causes foldback limiting if it exceeds 200 mV.

Senses ground reference at point of regulation in host

Local ground reference for power supply and return for all supplies except+ 5 V. Power supply chassis is floating.

Power up initialization signal for host product. It stays low at least 50 ms after+ 5 V comes into regulation.

Line sense for power failure warning logic. It also provides negative supply for current sense amplifier

during power-up.

OFF-1/ON-0 Host

A4

PWRFL-0

R DIVIDER

SON

620-0295-00 POWER SUPPLY

A4

A2

A4 A3

A4

A3 supply and lets it float to turn off the supply.

Host Power failure warning. Provides at least 11 ms warning

A3

@

The host product pulls this line low to turn on the power

to host product that DC supplies might fail. Resistive divider. This adjusts the resistive load in

series with the primary of T140 according to the selected line voltage. At 230 V nominal both resistors are in series. At 115 V only one is used.

Shutdown signal to Pulse Width Modulator. Caused by

the + 5 V supply exceeding 6.0 V, the + 1 2 V supply

exceeding 13.5 V, or loss of the -12 V supply to the current sense amplifier.

A-1

(

CHANGE INFORMATION

(

I·

l!ii

COMMITTED TO EXCELLENCE

PRODUCT MANUAL PART NO. ___

n

620-0295-00 LOW VOLTAGE POWER SUPPLY SERVICE

0_7_0_-_3 7_3_2_-_o_o ___________ _

MANUAL CHANGE INFORMATION

EFFECTIVE ALL SERIAL NUMBERS

Pages 2-1, 2-2, 2-3, 2,4, 4-3 and 5-11

REPLACE ABOVE PAGES WITH ATTACHED PAGES

TEXT CHANGES

CHANGEREFERENCE DATE ______

Cl/1081 l_0_-_1_-8_1 __

THIS IS A PAGE REPLACEMENT PACKAGE.

The area of change is marked

by a change bar in the margin.

1. Remove the appropriate pages from your manual and insert the attached pages.

2. Update Manual Revision Status page i in the front of your manual to indicate the new revision letter, date revised, and which pages were revised. You will find this

information, centered, at the bottom of each replacement page. (This update is for your information only.)

3. Keep this cover sheet in the Change Information section at the very back of your manual for a permanent record.

Section 2

SPECIFICATIONS

PHYSICAL

Figure weighs 9.5 lbs (4.3 kg).

2-i

gives the dimensions of the module. It

ELECTRICAL

Tables 2-1, 2-2, and 2-3 give the electrical specifications for the Power Supply module. The following

definitions explain the column headings. Characteristic: Property of equipment. Performance Requirement: A statement that defines a

characteristic in quantitative terms of performance, usually in limit form. The Performance Check section of this manual describes procedures to verify the performance.

Table 2-1

LINE INPUT

Characteristic

Line voltage

115 V nominal

230 V nominal

Frequency Crest factor Fuses

Maximum power

consumption

8

Excluding AC for fans and disk. II maximum current were drawn from all DC

supplies simultaneously, ii would result in input power of approximately

510

w.

Performance

Requirement

90 to 132 V 180 to 264 V

Supplemental Information

48 to 66 Hz

1 .35 to 1 .4 1 4

115 V: 6.25 A medium 230 V: 3 A fast

350

wa

Supplemental Information: Statements that explain performance requirements or that provide reference information. These are not supported by performance check procedures in the manual.

The performance requirements cited in this section are valid only within the following conditions:

e The load on the

+

5 V supply is between 3 and 30 A.

e AC line supply is 48 to 66 Hz, 90 to 132 V or 180 to

264 V, with the crest factor between 1 .35 and 1 .414. The crest factor is the ratio of peak to rms voltage. It falls below 1.414 as the voltage departs from a sine wave.

~

The module has been calibrated within and is

operating within the specified environmental limits.

620-0295-00 POWER SUPPLY

Figure 2-1. Dimensions.

2-1

SPECIFICATIONS

Table 2-2

DC SUPPLIES

Characteristic

+ 5 V Supply

Regulation

Ripple Minimum load Maximum load Foldback cur-

rent limiting

Overvoltage protection

+ 12 V Supply

Regulation Ripple Maximum load Foldback cur-

rent limiting Reverse volt-

age clamp

Overvoltage protection

Performance Requirement

a

±3%

30

A

<37

A

±3%

4A

<6A

Supplemental Information

Measured at sense line

100 mV p-p

3

Ab

~7V

C

20 mV p-p

-0.7V

±15

voe

± 17 V peak

Characteristic

+ 55 V Supply

Regulation

Temperature coefficient

Ripple

Maximum load

Foldback current limiting

Reverse volt-

age clamp

-5.2 V Supply Regulation Ripple Maximum load

Foldback current limiting

Reverse voltage clamp

Performance Requirement

±2%

1.25 A

<1.9 A

±4%

4A

<4.8 A

Supplemental

Information

Initial setting: +55.1 V±100mV

5 mV per °C average

from

o

to 70°C at

VR579

25 mV p-p at 60 Hz 50 mV p-p at 40 kHz

-0.7 V

100 mV p-p

+0.7 V

I

+ 24 V Supply

Regulation Ripple Maximum load Foldback cur-

rent limiting Reverse volt-

age clamp

8

5.07 5 V at point of regulation in host product.

bMinlmum loads are not required for the other supply voltages.

0

speclal Requirements for Memory Boards: During power up, the -1 2 V supply must reach -5 Volts before the +12 V supply reaches +1 O V. During power down, the +1 2 V supply must not overshoot.

±3%

20 mV p-p

1.8 A <2.8 A

-0.7 V

2-2

-12 V Supply

REV, SEP 1981

Regulation Ripple Maximum load Foldback cur-

rent limiting Reverse volt-

age clamp

±3%

20 mV p-p 1 A <1.5 A

+0.7 V

620-0295-00 POWER SUPPLY

SPIECIF!CA'fiONS

Table 2-3

TTL SIGNALS

Supplemental

Information

TTL initialization signal

5 V

TTL power failure warning signal

Characteristic

INIT-0

PWRFL-0

Performance

Requirement

Must stay low at least 50 ms after supply reaches

4.75 volts (nom.).

+

Goes low when supply drops below

4.75 volts (nom.).

+

Must go low at least 11 ms before INIT-0.

+

5 V

+

ENVIRONMENTAL

Table 2-4 describes the environment in which the Power Supply module is intended to operate. The

performance requirements in the electrical specifica-

tion are valid only if these environmental limits are met.

Table 2-4

ENVIRONMENTAL LIMITS

Characteristic

Temperature

Operating Heat sink: 0 to 40°C ambient Circuit boards: 0 to 70°C

Non-operating

Humidity

Operating and Up to 90% noncondensing Non-operating

Altitude

Operating

Non-operating 50,000 ft (15 km)

Vibration

Non-operating Withstands 0.Q15 in p-p (0.38 mm), 10

Shock

Non-operating

Bench handling

Non-operating

Packaged product

vibration and shock Association Pre-Shipment Test Proce-

Electromagnetic compatibility

Line transients

Oscillatory surge Withstands oscillatory surges up to 2.5

Ride-through

Information

-55 to 75°C

15,000 ft (4.5 km). Decrease maximum

operating temperature -1 °C for every

1,000 ft (300 m) above 5,000 ft (1 .5 km).

to 55 Hz sine wave, 15 min each axis a!id 1 0 min each axis at resonance or 55 Hz.

Withstands 30 g, halfsine, 11 ms, 18 shocks

Withstands drop from 45 degrees, 4 in

(102 mm), or equilibrium on all significant faces.

Qualifies under National Safe Transit

dure, Project 1 A-8-1, when packaged as shipped from factory.

Qualifies under FCC standard for Class A computing devices (Docket No.

20780) with respect to conducted emissions.

For radiated emissions, refer to specification for the host product.

kV at 1.5 MHz. At line voltages between 95 and 132 V

or 180 and 264 V, supplies remain within regulation for at least 20 ms after

loss of line voltage. For line voltages

between 90 and 95 V, supplies remain

in regulation for at least 1 0 ms.

I

620-0295-00 POWER SUPPLY

REV, SEP 1981

2-3

SPECIFICATIONS

EXTERNAL CONNECTIONS

Table 2-5 describes the connections between the Power Supply module and the host product.

Connector

J71 J72 J73-1

-2

-3

-4

-5

-6

-7

-8

-9

-10

J74-1

-2

-3

-4

J76-1

-2

J10011-3

-2

J10021-3

-2 J1003 J1004 J9001

Table 2-5

EXTERNAL CONNECTIONS

Name Use

+5 RTN +5 + 12 V

+ 12 V G SENSE

+ 5 V SENSE PWRFL-0 Power failure warning

INIT-0 Power up initialization

GND

-12 V -12 Voutput

-5.2V -5.2 V output

-5.2 V GND Ground

+ 24 V + 24 V +55 V

OFF-1 /ON-0

GND

Return for+ 5 V supply + 5 Voutput + 12 Voutput

+ 12 V output

Ground sense from host

product + 5 V sense from host

product

signal

Return for all supplies

except+ 5 V

-5.2 V output

+ 24 V output

+ 55 V output Power control line from host

product Ground

115 VAC output

Safety ground

115 VAC output (empty)

115 VAC output 115 VAC output

Power cord

2-4

(a)

620-0295-00 POWER SUPPLY

PERFORMANCE CHECK

2. Turn on the power supply.

3. Test the trigger level by touching the Channel probe to+

V SENSE

5

(J73-4). If

the oscilloscope

does not trigger on ,contact, adjust TRIGGER

LEVEL and repeat. Fasten the probe to + 5 V

SENSE.

to INIT (J73-6).

4. Connect Channel

5. Position the Channel

2

ground reference at the

1

center of the screen and position the Channel 2 ground reference one division above the bottom.

6. Set TRIGGER MODE to SINGLE SWEEP.

7. Turn the power supply OFF and then ON. Compare the waveform with that shown in Figure

4-2. INIT-0 should remain low for at least 50 ms

I

after+ 5 V SENSE reaches its lower margin of 4.75

V.

Change the oscilloscope settings as follows:

8.

TRIGGER MODE

AUTO

TRIGGER SLOPE

9. Move the Channel 1 probe to PWRFL-0 (J73-5). Test the trigger level by touching the probe to the

pin and removing it. If the oscilloscope does not trigger when the probe is removed, adjust TRIGGER LEVEL and repeat. Fasten the probe to PWRFL-0.

10. Turn off the power. This simulates a power failure

and should trigger the oscilloscope. Compare the waveform with that shown in Figure

4-3. PWRFL-0 should go low at least 11 ms before INIT-0. Because the interval varies with line voltage and the load on the power supply, you may need to adjust TIME/DIV to as little as 2 ms or as much as 200 ms.

CURRENT LIMITING AND MAXIMUM LOADS

1

Checking performance of the current limiting circuits and operation at maximum

requires special

load

test

equipment which is not ordinarily available to customers. Consult your Tektronix Service Center for further

information.

This completes the performance check.

3732-18A

Figure 4-2. Power-Up Waveform.

MAXIMUM AND MINIMUM LINE VOLTAGE

The preceding checks may be repeated while using an autotransformer to adjust the line voltage to the

minimum and maximum values given in Table 2-1.

However, a complete test requires special equipment which is not ordinarily available to customers. Consult your Tektronix Service Center for further information.

620-0295-00 POWER SUPPLY

REV, OCT 1981

3732-19

Figure 4-3. Power-Down Waveform.

4-3

THEORY OF OPERATION

l

55 V Supply

Power is supplied by a full-wave rectifier across

Terminals 1 and 2 of T320. A 3 mA constant current

source provides base current to the pass transistor. The error amplifier controls the base voltage through a

Zener diode. This diode raises the output of the error

amplifier to about 56.5 Vat minimum load. The sampling network holds the inverting input at about

2.5 V.

R85 senses the load current and turns on 0271 at less

I than 1.9 A. R27 4 and a second constant current source

(0238) cause foldback limiting.

+5 V Supply

The + 5 V supply is taken from Terminals 20 and 22 of T320 with a floating return to Terminal 21. Current passes through a primary smoothing filter and a secondary hash filter. The+ 5V SENSE voltage provides feedback from the host product to the Pulse Width Modulator in the Control circuit. The supply is designed to give 5.075 V ± 3% at the point of regulation in the host product.

Foldback limiting keeps the current from exceeding 37 A. The current sense amplifier compares the drop across the current sense resistor (R1001) with a reference voltage across R142. Current from + 5 V REF and the + 55 V supply ordinarily holds the reference voltage at about 170 mV. When the drop across the sense resistor exceeds this amount, the amplifier drives CS (current sense) positive. If CS exceeds 200 mV, it causes the Pulse Width Modulator to reduce all output voltages. The decline in the+ 55 V supply reduces the reference voltage at R142. This causes limiting to occur with less load current.

During power-up, a charge pump creates a negative supply for the current sense amplifier until the regulated supplies come up. This avoids a false overcurrent shutdown. The pump is driven by L SENSE

from the Logical On/Off switch. It builds a negative voltage ac.ross C251 by charging C246 through CR256 and then discharging it through CR255.

A Zener diode provides overvoltage protection at 6.0 V

by sending SON (shutdown) to the Pulse Width Modulator.

TIMING CIRCUIT Initialization (INIT-0)

The INIT-0 signal goes low when the+ 5 V supply drops below 4.75 V and remains low for at least 50 ms after the + 5 V comes up to 4.75 V. The signal can be used to reset the host product.

The+ 5 V output is sampled in the host product via+ 5 V SENSE. The divider values are such that input to the op amp equals 2.5 V REF when the+ 5 V supply

reaches its lower margin of 4.75 V. At this point during power-up, the op amp begins charging C385. The RC network provides a delay of at least 50 ms. When the voltage across C385 exceeds about 4.5 V, output of the comparator goes low. This drives INIT-0 high.

While the + 5 V supply is coming up,+ 5 V REF supplies voltage to the non inverting input of the comparator.

During power-down, the process is reversed except that the RC delay is much shorter. When the+ 5 V supply falls below 4.75 V, the output of the op amp goes negative and C385 discharges through the diode.

This causes the output of the comparator to go high

and causes INIT-0 to go low.

Power Failure (PWRFL-0)

A power failure circuit monitors the line input and pulls

PWRFL-0 low if the AC is interrupted. Thus, this signal

warns the host product that the DC supplies might fail.

It does not provide warning of failure due solely to low

line voltage. The circuit tests L SENSE (line sense) from the Logical

On/Off switch in the Control circuit. A divider scales L SENSE to approximately 6 V peak and applies it to a voltage follower which charges C392 during power-up. When the capacitor reaches about 4.5 V the output of the comparator goes low and drives PWRFL-0 high.

The time constant is such that the output of the comparator ordinarily stays low between line peaks. If the line AC fails, however, C392 discharges sufficiently to drive the output of the comparator high. This in turn causes PWRFL-0 to go low.

The+ 5 V supply remains within margin for at least 11 ms after the power failure alarm.

620-0295-00 POWER SUPPLY REV, OCT 1981

5-11

\-! ..-.P"-------------------------------------

\

Tektron~

COMMITTED TO EXCELLENCE

PRODUCT 620-0295-00 LOW VOLTAGE POWER SUPPLY

3732

MANUALPARTNQ o

EFFECTIVE ALL SERIAL NUMBERS

Pages 1-1, 1-2, 2-3, 2-4, 5-1 through 5-4, 6-1 through 6-11, 8-1 through

8--6, and-Fig. 1 Exploded View

REPLACE ABOVE PAGES WITH ATTACHED PAGES OF THE SAME NUMBERS.

ADD NEW COMPONENT LOCATIONS AND SCHEMATICS.

7

o-

-QQ

TEXT, COMPONENT LOCATIONS, AND PARTS CHANGES

MANUAL CHANGE INFORMATION

CHANGEREFERENCE __ c_

DATE _________ _

2

1

_1

_2_8_1_

12-4-81

[

L

l

THIS IS A PAGE REPLACEMENT PACKAGE.

The area of change is marked by a change bar in the margin.

Remove the appropriate pages from your manual and insert the attached pages.

1 .

Update Manual Revision Status page i in the front of your manual to indicate the new

2.

revision letter, date revised, and which pages were revised. You will find this information, centered, at the bottom of each replacement page. (This update is for

your information only.)

3. Keep this cover sheet in the Change Information section at the very back of your manual for a permanent record.

Section

1

(

l

r

l

INTRODUCTION

ABOUT THIS MANUAL

This manual is intended for use by technicians servicing Tektronix products that contain the 620-0295-00,

-01, or -02 Low Voltage Power Supply module (Figure 1-1).

The manual contains the following information:

DESCRIPTION OF THE MODULE

GENERAL

The power supply module is intended for use in a number of Tektronix products, such as the TEKTRONIX 4112 Computer Display Terminal and the TEKTRONIX 4909 Multi-User File Management System. This manual uses the term "host product" to refer to the product in which the module is installed.

The module supplies the following regulated DC voltages to the host product: 5 V, -5.2 V, 12 V, -12 V, 24 V, and 55 V. In addition, 1 20 VAC is available to drive motors.

The module occupies approximately 5 by 5 by 9.5

inches within the chassis of the host product. An

external heat sink is approximately 7.5 by 1 Screws through the heat sink attach the module to the chassis.

O

inches.

• Specifications.

• Troubleshooting information.

• Performance check procedures.

• Circuit description.

• Replaceable parts lists and schematics.

Installation and adjustment procedures depend on the product in which the module is installed. Consult the service manual for that product.

PHYSICAL DESCRIPTION Main Assemblies

The power supply circuits are contained primarily on

four boards:

• A VDE Line Filter board, which provides line filtering to meet VDE certification requirements for

electromagnetic compatibility. (The VDE is the certifying agency in the Federal Republic of Germany.)

• A Line Voltage Selector board.

• An Inverter board, which rectifies and filters the line

voltage, then chops it at 20 kHz to drive the inverter transformer. The Control circuit regulates voltages by varying the width of the 20 kHz pulses according

to the input and output voltages and load current.

• A Regulator board, which rectifies and filters output

of the inverter transformer and provides post-

regulation. It also contains protection circuits and

asserts TTL signals for use by the host product.

I

620-0295-00 POWER SUPPLY

AC is available to drive fans and other components.

REV, NOV 1981

1-1

INTRODUCTION

Controls and Indicators

• Two Line Voltage switches allow operation on either 115 or 230 VAC nominal line voltage. These switches are accessible through the heat sink (Figure 1-2).

• A Logical On/Off switch isolates the system switch from line voltage. The host product turns on the

power supply by grounding the switch signal line (OFF-1 /ON-0). This allows the host product to keep

the power on until its operations are complete even

the operator has turned off the system power

if

switch.

• A high voltage warning flasher indicates the presence of dangerous voltages on the Inverter board.

Differences Among Versions

This section describes the main differences among the

-00, -01, and -02 versions of the module. The -01 version differs primarily in the location of a

spark gap on the Inverter board. The change supports operation at line voltages of 240 V. Component changes on the Regulator board altered the -5.2 V and

55 V current limits.

The -02 version incorporates the hand modifications of

the -01 version. It also adds filter components to the VOE Line Filter board and the Inverter board. The chassis-mounted line filter was changed.

Figure 1-2. Line Voltage Switches.

1-2

@, NOV 1981

620-0295-00 POWER SUPPLY

SPECIFICATIONS

Table 2-3

TTL SIGNALS

Characteristic

INIT-0

PWRFL-0

Performance Requirement

Must stay low at least 50 ms after supply reaches

+

4.75 volts (nom.). Goes low when supply drops below

+

4.75 volts (nom.).

Must go low at least 11 ms before INIT-0.

+

5

V

+

Supplemental

Information

TTL initialization signal

5

V

TTL power failure warning signal

ENVIRONMENT Al

Table 2-4 describes the environment in which the

Power Supply module is intended to operate. The performance requirements in the electrical specification are valid only if these environmental limits are met.

Table 2-4

ENVIRONMENTAL LIMITS

Characteristic information

Temperature

Operating Heat sink: ambient Circuit boards:

Non-operating -55 to 75°C

Humidity

Operating and Up to 90% noncondensing Non-operating

Altitude

Operating 15,000 ft (4.5 km). Decrease maximum

operating temperature -1 °c for every

1,000 ft (300 m) above 5,000

Non-operating 50,000 ft (15 km)

Vibration

Non-operating Withstands 0.Q15 in p-p (0.38 mm), 10

to 55 Hz sine wave, 15 min each axis and 1 0 min each axis at resonance or 55 Hz.

Shock

Non-operating

Bench handling

Non-operating

Packaged product

vibration and shock

Electromagnetic

compatibility

Line transients

Oscillatory surge

Ride-through

Withstands 30 g, halfsine, 1 shocks

Withstands drop from 45 degrees, 4 in

(102 mm), or equilibrium on all signifi-

cant faces. Qualifies under National Safe Transit

Association Pre-Shipment Test Procedure, Project 1 A-B-1, when packaged as shipped from factory.

Qualifies under FCC standard for Class A computing devices (Docket No.

20780) and VOE 0871/6.8 with respect to conducted emissions.

For radiated emissions, refer to specifi-

cation for the host product.

Withstands oscillatory surges up to 2.5

kV

at 1.5 MHz.

At line voltages between 95 and 132 or 180 and 264 within regulation for at least 20 ms after loss of line voltage. For line voltages between 90 and 95 in regulation for at least 10 ms.

o

to 40°C

o

to 70°C

V,

supplies remain

i

ms, 18

V,

supplies remain

ft

(1 .5 km).

I

V

L

620-0295-00 POWER SUPPLY

REV, NOV 1981

2-3

SPECIFICATIONS

EXTERNAL CONNECTIONS

Table 2-5 describes the connections between the

Power Supply module and the host product.

Connector

J71 J72 J73-1

-2

-3

-4

-5

-6

-7

-8

-9

-10

J74-1

-2

-3

-4

J76-1

-2

J1001 1-3

-2

J1002 1-3

-2 J1003 J1004 J9001

Table 2-5

EXTERNAL CONNECTIONS

Name

+5 RTN +5 + 12 V

+ 12 V G SENSE

+ 5 V SENSE + 5 V sense from host

PWRFL-0 INIT-0

GND

-12 V

-5.2 V -5.2 V output

-5.2 V GND

+ 24 V +24 V +55 V

OFF-1 /ON-0 Power control line from host

GND

Use

Return for+ 5 V supply + 5 V output + 12 V output

+ 12 V output Ground sense from host

product

product Power failure warning Power up initialization

signal Return for all supplies

except+ 5 V

-12 V output

-5.2 V output Ground

+ 24 V output + 24 V output + 55 V output

product

Ground 115 VAC output

Safety ground 115 VAC output

(empty) 115 VAC output 115 VAC output Power cord

2-4

@

620-0295-00 POWER SUPPLY

Section 5

THEORY OF OPERATION

INTRODUCTION

f

The Power Supply module uses a high-efficiency,

pulse-width-modulated inverter. This circuit rectifies and filters the line voltage, and then chops it at 20 kHz to couple power to the DC supplies.

Figure 5-1 is a simplified diagram of the inverter. Two switching transistors push and pull current through the inverter transformer at 20 kHz. The secondary of the inverter transformer feeds a typical full wave rectifier. An LC filter smooths the 40 kHz square waves from the · rectifier.

The Control circuit regulates the+ 5 V output by varying the duty cycle of the switches between 0 and 45% each. Increasing the duty cycle raises the average voltage in the secondary.

The module contains four circuit boards:

• A VDE Line Filter board (Schematic A1) to meet · electromagnetic compatibility requirements. (VDE is the certifying agency in Federal Republic of Germany.)

• A Line Voltage Selector board (Schematic A2) with two switches to select nominal line voltages of 115 or 230 volts.

• An Inverter board (Schematic the Primary and Control circuits.

• A Regulator board (Schematic A4), which contains the DC supplies and a timing circuit to assert interface signals.

An interconnect diagram shows connections among the boards and the host product. Schematics A 1 and A2 for the VDE Line Filter and Line Voltage Selector

boards also are on this sheet.

A3), which contains

I

620-0295-00 POWER SUPPLY

Figure 5-1. Simplified Inverter Circuit.

REV, NOV 1981

5-1

THEORY OF OPERATION

DC SUPPLIES

The module provides the following voltages to the host

product:

+sv

+

12 V

+24 V

+55V

-5.2V

-12 V

NOTE

All DC supplies must not be fully loaded simultaneously. Table 2-1 gives the maximum load

through the power cord excluding AC for motors.

All DC grounds in the Power Supply module are floating from the chassis. This protects the chassis from corrosion by forcing current to return through the wiring harness.

Three types of ground connections are used between the module and a common ground point in the host

product:

• GND is the power supply working ground and return for all supplies except + 5 V.

• + 5 V RTN is a separate return for the + 5 V, 30 A supply.

• G SENSE (ground sense) gives voltage regulators a direct reference to ground in the host product. Since the line does not carry load current, the ground reference does not vary with changes in the load.

30A

4A

1.8 A

1.25 A

4A 1 A

SYSTEM INTERFACE SIGNALS

OFF-1 /ON-0 The host product grounds this signal

to turn on the power supply.

INIT-0

PWRFL-0

Initialization. The power supply holds this signal low for at least the+ 5 V supply comes into regula-

tion.

Power failure warning. The power supply pulls this signal low at least 11 ms before the + 5 V supply drops out of regulation.

50

ms after

5-2

@

620-0295-00 POWER SUPPLY

I

(

BLOCK DESCRIPTION

The block diagram (foldout) shows the major elements of the power supply: the Primary circuit, the Control circuit, and the DC supplies.

I The Primary circuit consists of a ·line filter, a line

voltage selector, a rectifier and DC filter, and two switching transistors. These are connected to the remainder of the power supply through transformers and to the chassis through a capacitor which has a 2 kV rating. This arrangement isolates line voltage from the chassis and other circuits and provides a minimum breakdown voltage of 1.5 kV.

THEORY OF OPERATION

• The Schmitt trigger supplies local DC to the Pulse Width Modulator and base drive. During power-up, this current comes from the Logical On/Off switch until the 24 V supply comes up.

• The Pulse Width Modulator circuit regulates the + 5 V supply (and provides preliminary regulation for the others) by varying the duty cycle of the switching transistors.

• The Base Drive circuit amplifies these control signals and couples them to the bases of the switching transistors.

The Control circuit consists of a Logical On/Off switch, a Schmitt trigger, a Pulse Width Modulator circuit, and a Base Drive circuit.

• The Logical On/Off switch controls a triac on the AC line. The host product controls this switch by OFF-

1 /ON-0.

1

The DC supplies provide rectification, filtering, regulation, and overload protection. Feedback to the Pulse Width Modulator causes it to shut down if the+ 5 V or + 12 V supply exceeds its voltage limit and also provides foldback current limiting for the+ 5 V supply. The Timing circuit asserts power-up initialization and power failure warning signals to the host product.

620-0295-00 POWER SUPPLY

REV, NOV 1981

5-3

THEORY OF OPERATION

DETAILED CIRCUIT DESCRIPTION

PRIMARY CIRCUIT

_\ _w_A_R_N_I_N_G--,1

The VDE Line Filter, Line Voltage Selector, and Inverter boards are connected directly to the AC lines. To avoid injury by electrical shock, an isolation transformer should be used during servicing of these boards.

Hazardous voltages are present in the primary circuit. After power has been disconected, the neon flasher on the Inverter board indicates that

these voltages are still present in the filter capacitors.

Refer to Schematic A2 (on same sheet as the interconnect diagram).

Line Voltage Selector

Two switches configure the primary circuit for operation from either 115 or 230 V lines.

The 115 V configuration (Figure 5-2) creates a voltage

(neutral) to the C line between

doubler by connecting the filter capacitors. The four 115 VAC connectors

(J1001 through J1004) are driven in parallel directly across N and L' (the AC line on the switched side of the triac). These connectors provide power for fans and disk drives.

N

5-4

Figure 5-2. Configuration for the 115 V Line.

@

620-0295-00 POWER SUPPLY

Section 6

REPLACEABLE

ELECTRICAL PARTS

PARTS ORDERING INFORMATION

Replacement parts are available from or through your local

Tektronix, Inc. Field Office or representative.

Changes to Tektronix instruments are sometimes made to accommodate improved components as they become available, and to developed in our engineering department. It is therefore important, when ordering parts, to include the following information in your order: Part number, instrument type or number, serial number, and modification number if applicable.

improved part, your local Tektronix, Inc. Field Office or representative will contact you concerning any change in part number.

manual.

you the benefit of the latest circuit improvements

give

If a part you have ordered has been rep I aced with a new or

Change information, if any, is located at the rear of this

LIST OF ASSEMBLIES

A list of assemblies can be found at the beginning of the

Electrical Parts List. The assemblies are listed in numerical order.

When the complete component number of a part is known, this list will identify the assembly in which the part is located.

CROSS INDEX-MFR. CODE NUMBER TO

MANUFACTURER

The Mfr. Code Number to Manufacturer index for the Electrical Parts List is located immediately after this page. The Cross Index provides codes, names and addresses of manufacturers of components listed in the Electrical Parts List.

Only the circuit number will appear on the diagrams and circuit board illustrations. Each diagram and circuit board illustration is clearly marked with the assembly number. Assembly numbers are also marked on the mechanical exploded views located in the Mechanical Parts List. The component number is obtained by adding the assembly number prefix to the circuit number.

The Electrical Parts List is divided and arranged by

assemblies in numerical sequence (e.g., assembly A1 with its

subassemblies and parts, precedes assembly A2 with its sub-

assemblies and parts).

Chassis-m_ounted parts have no assembly number prefix

and are located at the end of the Electrical Parts List.

TEKTRONIX PART NO. (column

Electrical

Indicates part number to be used when ordering replace-

ment part from Tektronix.

Parts

two of

List)

the

SERIAL/MODEL NO. (columns three and four

the Electrical Parts List)

of

Column three (3) indicates the serial number at which the part was first used. Column four (4) indicates the serial number at which the part was removed. No serial number entered indicates

part is good for all serial numbers.

ABBREVIATIONS

Abbreviations conform to American National Standard Y1 .1.

COMPONENT NUMBER (column one of the

Electrical Parts List)

A numbering method has been used to identify assemblies, subassemblies and parts. Examples of this numbering method and typical expansions are illustrated by the following:

Example a.

A23R1234 A23 R1234

component number

~

~~

Read: Resistor 1234 of Assembly 23

Example b.

A23A2R1234 A23 A2 R1234

Assembly

~

Read: Resistor 1234 of Subassembly 2 of Assembly 23

~

620-0295-00 POWER SUPPLY

component number

Subassembly

L__

number

Circuit number

DESCRIPTION (column five of the

NAME

description by a colon (:). Because of space limitations, an Item Name may sometimes appear as incomplete. For further Item Name identification, the U.S. Federal Cataloging Handbook H6-1 can be utilized where possible.

&

Electrical Parts

In the Parts List, an Item Name is separated from the

List)

MFR. CODE (column six of the Electrical Parts

List)

Indicates the code number of the actual manufacturer of the

part. (Code to name and address cross reference can be found

immediately after this page.)

MFR. PART NUMBER (column seven of the

Electrical Parts Lisi)

Indicates actual manufacturers part number.

6-1

REPLACEABLE ELECTRICAL PARTS

CROSS INDEX-MFR. CODE NUMBER TO MANUFACTURER

Mfr. Code

OOOFG OOOFJ

00213 00779

01121 01281

01295 02777

03508 04222

04713 07263

12697 14193 14433

14552 14752 l.4952

15454 22526 27014 50558 53944 54473 55210 55680 56289 59660 72982 73138 75042

75915 76493

80009 90201

91637

Manufacturer

RIFA WORLD PRODUCTS INC. MARCOM SWITCHES INC.

NYTRONICS, COMPONENTS GROUP, INC.,

SUBSIDIARY OF NYTRONICS, INC. AMP, INC. ALLEN-BRADLEY COMPANY TRW ELECTRONIC COMPONENTS, SEMICONDUCTOR OPERATIONS TEXAS INSTRUMENTS, INC., SEMICONDUCTOR GROUP HOPKINS ENGINEERING COMPANY GENERAL ELECTRIC COMPANY, SEMI-CONDUCTOR PRODUCTS DEPARTMENT AVX CERAMICS, DIVISION OF AVX CORP. MOTOROLA, INC., SEMICONDUCTOR PROD. DIV. FAIRCHILD SEMICONDUCTOR, A DIV. OF FAIRCHILD CAMERA AND INSTRUMENT CORP.

CLAROSTAT MFG. CO., INC. CAL-R, INC.

ITT SEMICONDUCTORS MICRO SEMICONDUCTOR CORP.

ELECTRO CUBE INC. OPTICAL ENGINEERING INC.

RODAN INDUSTRIES, INC. BERG ELECTRONICS, INC. NATIONAL SEMICONDUCTOR CORP. ELECTRONIC CONCEPTS, INC. ELT INC., GLOW LITE DIVISION MATSUSHITA ELECTRIC, CORP. OF AMERICA GETTIG ENG. AND MFG. COMPANY NICHICON/AMERICA/CORP.

SPRAGUE ELECTRIC CO. TUSONIX INC. ERIE TECHNOLOGICAL PRODUCTS, INC. BECKMAN INSTRUMENTS, INC., HELIPOT DIV. TRW ELECTRONIC COMPONENTS, IRC FIXED RESISTORS, PHILADELPHIA DIVISION LITTELFUSE, INC. BELL INDUSTRIES, INC.,

MILLER, J . W. , DIV.

TEKTRONIX, INC. MALLORY CAPACITOR CO., DIV. OF P. R. MALLORY AND CO., INC. DALE ELECTRONICS, INC.

Address

7625 BUSH LAKE RD P.O. BOX 35263 67 ALBANY STREET

ORANGE STREET PO BOX 3608

1201 2ND STREET SOUTH

14520 AVIATION BLVD. PO BOX 5012, 13500 N CENTRAL EXPRESSWAY 12900 FOOTHILL BLVD.

ELECTRONICS PARK P. 0 BOX 867, 19TH AVE. SOUTH 5005 E MCDOWELL RD,PO BOX 20923

464 ELLIS STREET LOWER WASHINGTON STREET 1601 OLYMPIC BLVD. 3301 ELECTRONICS WAY PO BOX 3049 2830 E FAIRVIEW ST. 1710 S. DEL MAR AVE. 2495 BLUE BELL DR. P.O. BOX 696 2905 BLUE STAR ST. YOUK EXPRESSWAY 2900 SEMICONDUCTOR DR. 526 INDUSTRIAL WAY WEST BOX 698 1 PANASONIC WAY PO BOX 85, OFF ROUTE 45 6435 N PROESEL AVENUE 87 MARSHALL ST. 2155 N FORBES BLVD 644 W. 12TH ST. 2500 HARBOR BLVD.

401 N. BROAD ST. 800 E. NORTHWEST HWY

19070 REYES AVE., PO BOX 5825 PO BOX 500 3029 E. WASHINGTON STREET P. 0. BOX 372 P. 0. BOX 609

City, State, Zip

MINNEAPOLIS, MN 55435 CAZENOVIA, N.Y. 13035

DARLINGTON, SC 29532 HARRISBURG, PA 17105 MILWAUKEE, WI 53204

LAWNDALE, CA 90260 DALLAS, TX 75222

SAN FERNANDO, CA 91342 SYRACUSE, NY 13201

MYRTLE BEACH, SC 29577

PHOENIX, AZ 85036 MOUNTAIN VIEW, CA 94042

DOVER, NH 03820 SANTA MONICA, CA 90404

WEST PALM BEACH, FL 33402

SANTA ANA, CA 92704 SAN GABRIEL, CA 91776

SANTA ROSA, CA 95402 ANAHEIM, CA 92806 NEW CUMBERLAND, PA 17070

SANTA CLARA, CA 95051

EATONTOWN, NJ 07724

PAULS VALLEY, OK 73075

SECAUCUS, NJ 07094

SPRING MILLS, PA 16875

CHICAGO, IL 60645

NORTH ADAMS, MA 01247

TUCSON, AZ 85705 ERIE, PA 16512

FULLERTON, CA 92634

PHILADELPHIA, PA 19108 DES PLAINES, IL 60016

COMPTON, CA 90224

BEAVERTON, OR 9_7077

INDIANAPOLIS, IN 46206

COLUMBUS, NE 68601

6-2

REV DEC

1981

620-0295-00 POWER SUPPLY

REPLACEABLE ELECTRICAL PARTS

Tektronix Serial/Model No.

Component No. Part No. Eff Dscont Name

Al Al A2

A3 670-6430-00

A3

670-7248-00

----- -----

670-7248-01

----- -----

670-6450-00

----- -----

670-6430-01

CKT BOARD ASSY:VDE FILTER

(620-0295-00, -01 ONLY) CKT BOARD ASSY:VDE FILTER (620-0295-02 ONLY) CKT ,BOARD ASSY:VOLTAGE SELECTOR 80009 670-6540-00 CKT BOARD ASSY:INVERTER (620-0295-00 ONLY)

CKT BOARD ASSY:INVERTER

----- ----- (620-0295-01 ONLY)

A3

A4 670.:.6429-00

670-6430-02 CKT BOARD ASSY:INVERTER 80009

----- -----

(620-0295-02 ONLY) CKT BOARD ASSY:REGULATOR

----- ----- (620-0295-00, -01 ONLY)

A4

670-6429-01 CKT BOARD ASSY:REGULATOR

----- ----- (620-0295-02 ONLY)

Al

670-7248-00 CKT BOARD ASSY:VDE FILTER 80009

----- ----- (620-0295-00, -01 ONLY)

Al

670-7248-01

CKT BOARD ASSY:VDE FILTER 80009

----- ----- (670-0295-02 ONLY)

AlJ64

131-0589-00 TERMINAL,PIN:0.46 L X 0.025

----- ----- (QUANTITY OF 2)

A1J65 AlJ66

131-0589-00 TERMINAL,PIN:0.46 L X 0.025 SQ 80009

----- -----

131-0589-00

(QUANTITY OF 2;620-0295-00;0l ONLY) TERMINAL,PIN:0.46 L X 0.025 SQ 80009

----- ----- (QUANTITY OF 2)

AlLl

108-1124-00

COIL,RF:FIXED,TOROID,150MH

----- ----- (620-0295-02 ONLY)

AlL2

108-1124-00

COIL,RF:FIXED,TOROID,150MH 80009 108-1124-00

----- ----- (620-0295-02 ONLY)

AlTl AlUl

120-0640-00

----- -----

285-1244-00

XFMR,TOROID:18 TURNS,BIFILAR 80009 120-0640-00

(620-0295-02 ONLY)

CAPACITOR-RES:0.5UF,10%,22 OHM,10%,250VAC

----- ----- (620-0295-02 ONLY)

& Description

SQ

Mfr

Code Mfr Part Number

80009 670-7248-00

80009 670-6430-00

80009 670-6430-01

670-6430-02

80009

80009 131-0589-00

80009 108-1124-00

14752 RG1784-l

670-6429-00

670-6429-01

670-7248-00 670-7248-01

131-0589-00

AlU2

119-1168-00 CAPACITOR-RES:0.lUF,20%

----- ----- (620-0295-02 ONLY)

A2 A2J67

A2J68 A2J69

670-6450-00 131-0589-00

----- -----

131-0589-00

----- -----

131-0589-00

----- -----

A2Sl A2S2 ,A2Wl

! 620-0295-00 POWER SUPPLY

260-1980-01 260-1980-01 131-0566-00

& 22 OHM,10%,250V

A2 VOLTAGE SELECTOR CKT BOARD ASSY:VOLAGE SELECTOR

TERMINAL,PIN:0.46 L X 0.025

(QUANTITY OF 4)

TERMINAL,PIN:0.46 L X 0.025

(QUANTITY OF 4)

TERMINAL,PIN:0.46 L X 0.025

(QUANTITY OF 4)

SWITCH,SLIDE:DPDT,10A,125V,MKD 115V /230V OOOFJ 4021.1913 SWITCH,SLIDE:DPDT,10A,125V,MKD 115V/230V OOOFJ 4021.1913 BUS CONDUCTOR:DUMMY RES,2.375,22 AWG

REV DEC 1981

SQ SQ SQ

14752 RG1782-l

80009 670-6450-00 80009 131-0589-00

80009 13i-0589-00 80009 131-0589-00

55210 L-2007-1

6-3

REPLACEABLE ELECTRICAL PARTS

Tektronix Serial/Model No.

Component No. Part No. Eff Dscont

A3

670-6430-00

----- -----

A3 A3

A3Cl01 A3Cl03 A3Cl25

A3Cl55 A3Cl70

A3C235 A3C263 A3C281

A3C283 A3C305 285-1203-00

A3C319 A3C355 A3C370 A3C379 A3C407 A3C435

A3C439 A3C466 A3C476

A3C476

670-6430-01

-----

670-6430-02 CKT BOARD ASSY:INVERTER

-----

285-1246-00

-----

285-1246-00

----- -----

283-0177-00

290-0829-00 290-0829-00 CAP.,FXD,ELCTLT:750UF,+100-10%,200V

285-1196-00 283-0057-00 283-0060-00 283-0067-00

285-1203-00 290-0829-00 290-0829-00 290-0844-00 CAP.,FXD,ELCTLT:lOOUF,-10+75%,35 WVDC 54473 ECE-A35VlOOL 281-0536-00 283-0111-00 CAP.,FXD,CER DI:0.1UF,20%,50V 72982 8121-N088Z5Ul04M

283-0194-00 CAP.,FXD,CER DI:4.7UF,20%,50V 283-0134-00 283-0114-00 CAP.,FXD,CER DI:0.0015UF,5%,200V

----- -----

283-0397-00 CAP.,FXD,CER DI:1160PF,2%,100V

-----

Mfr

Code

Description

&

Name

A3

INVERTER

CKT BOARD ASSY:INVERTER

(620-0295-00 ONLY) CKT BOARD ASSY:INVERTER 80009 670-6430-01 (620-0295-01 ONLY)

(620-0295-02 ONLY) CAP.,FXD,PAPER:0.047UF,20%,250VAC

(670-6430-02 ONLY) CAP.,FXD,PAPER:0.047UF,20%,250VAC

(670-6430-02 ONLY) CAP.,FXD,CER DI:1UF,+80-20%,25V CAP.,FXD,ELCTLT:750UF,+100-10%,200V

CAP.,FXD,PAPER:0.01UF,20%,250V OOOFG PME 265 MB 510

CAP.,FXD,CER DI:0.1UF,+80-20%,200V 56289 274Cl0

CAP.,FXD,CER DI:100PF,5%,200V 72982 855-535U2Jl01J

CAP.,FXD,CER DI:0.001UF,10%,200V 72982 835-515Bl02K

CAP.,FXD,PLSTC:4UF,10%,200V 14952

CAP.,FXD,PLSTC:4UF,10%,200V CAP.,FXD,ELCTLT:750UF,+100-10%,200V 90201 PFP751SR2J3P2

CAP.,FXD,ELCTLT:750UF,+100-10%,200V 90201 PFP751SR2J3P2

CAP.,FXD,CER DI:1000PF,10%,500V 72982 301000 X 5P0102K

CAP. ,FXD,CER DI:0.47UF,+80-·20%,50V 72982 8131N087Z5U0474Z

(670-6430-00, -01 ONLY) (670-6430-02 ONLY)

Mfr Part Number

80009

80009 670-6430-02

56289 273C5

90201 90201 PFP751SR2J3P2

14952 C2551

72982

72982 805-509Bl52J

04222 3430100All 60PFG

670-6430-00

PFP751SR2J3P2

C2551

8151N057Z5U0475M

A3C533 283-0111-00 A3C535

A3C536

A3C539 A3C571

A3C571

A3C581 A3C587 A3CR126 A3CR127

A3CR129 A3CR130 A3CR181 A3CR182

A3CR183 A3CR184

A3CR187 A3CR331 A3CR381 A3CR385 A3CR405 A3CR414

A3CR439

283-0194-00 CAP.,FXD,CER DI:4.7UF,20%,50V 283-0194-00

283-0194-00 285-0596-00

-----

285-0719-00

-----

290-0534-00 283-0134-00 152-0141-02

152-0141-02 152-0141-02

152-0141-02-

152-0141-02 152-0141-02 152-0141-02

152-0141-02

152-0713-00

152-0333-00

152-0066-00

152-0400-00

152-0400-00 SEMICOND DEVICE:SILICON,400V,1A 80009

152-0066-00

CAP.,FXD,CER DI:0.1UF,20%,50V 72982 8121-N088Z5Ul04M CAP.,FXD,CER DI:4.7UF,20%,50V 72982 8151N057Z5U0475M

CAP.,FXD,CER DI:4.7UF,20%,50V 72982

CAP.,FXD,PLSTC:O.OlUF,1%,lOOV 14752 410B1Bl03F (670-6420-00, -01 ONLY)

CAP.,FXD,PLSTC:0.015UF,5%,100V (670-6420-02 ONLY) CAP.,FXD,ELCTLT:1UF,20%,35V 56289 l 96Dl05X0035HA1 CAP.,FXD,CER DI:0.47UF,+80-20%,50V 72982 8131N087Z5U0474Z SEMICOND DEVICE:SILICON,30V,150MA 01295 1N4152R SEMICOND

SEMICOND SEMICOND DEVICE:SILICON,30V,150MA 01295 1N4152R SEMICOND DEVICE:SILICON,30V,150MA 01295 SEMICOND DEVICE:SILICON,30V,150MA 01295 1N4152R SEMICOND DEVICE:SILICON,30V,150MA 01295 1N4152R SEMICOND DEVICE:SILICON,30V,150MA

SEMICOND DEVICE:SILICON,30V,150MA SEMICOND DEVICE:RECT BRIDGE,SI,400V,35A 04713

SEMICOND DEVICE:SILICON,55V,200MA 07263 SEMICOND DEVICE:SILICON,400V,750MA 14433 SEMICOND DEVICE:SILICON,400V,1A

SEMICOND DEVICE:SILICON,400V,750MA

DEVICE:SILICON,30V,150MA DEVICE:SILICON,30V,150MA 01295

72982

56289

01295 1N4152R

01295 1N4152R 01295

8151N057Z5U0475M

192.Pl5352

1N4152R 1N4152R

1N4152R SDA10388K FDH-6012 LG4016

80009

14433 LG4016

152-0400-00

6-4

REV DEC

1981

620-0295-00 POWER SUPPLY

A3 INVERTER (CONT)

REPLACEABLE ELECTRICAL PARTS

Component No.

A3CR457 A3CR513

A3CR523 A3CR536 A3CR555 A3DS259

A3E205 A3E235 A3E333

A3J60 A3J61 A3J62

A3J63 A3L430

A3L440 A3L569 A3Ql15

A3Q281 A3Q285 A3Q387 A3Q389

A3Q460 A3Q487

Tektronix

Part No.

152-0333-00 152-0686-00 152-0686-00 152-0066-00 152-0333-00 150-0035-00

119-0181-00 119-0181-00 119-0181-00

131-0608-00 131-0589-00 131-0608-00

131-0608-00 120-1165-00

108-0337-00 108-0691-00 151-0537-00

151-0342-00 151-0432-00 151-0208-02 151-0453-00 151-0136-03 151-0126-00

Serial/Model No.

Eff Dscont

Name & Description

SEMICOND DEVICE:SILICON,55V,200MA SEMICOND DEVICE:RECT,SI,100V,5A

SEMICOND DEVICE:RECT,SI,100V,5A SEMICOND DEVICE:SILICON,400V,750MA SEMICOND DEVICE:SILICON,55V,200MA LAMP,GLOW:90V,0.3MA

ARSR,ELEC SURGE:230V,GAS FILLED (670-6430-00 ONLY) ARSR,ELEC SURGE:230V,GAS FILLED (670-6430-00, -01 ,02 ONLY) ARSR,ELEC SURGE:230V,GAS FILLED (670~6430-01, -02 ONLY)

TERMINAL,PIN:0.365 L X 0.025 PH BRZ GOLD (QUANTITY OF 2) TERMINAL,PIN:0.46 L X 0.025 SQ (QUANTITY OF 9) TERMINAL,PIN:0.365 L X 0.025 PH BRZ GOLD (QUANTITY OF 10)

TERMINAL,PIN:0.365 L X 0.025 PH BRZ GOLD (QUANTITY OF 5) TRANSFORMER,RF:TOROID,COMMONMODE REJECT COIL,RF:FIXED,25UH COIL,RF:1.8MH THYRISTOR:TRIAC,10A,400V

TRANSISTOR:SILICON,PNP

TRANSISTOR:SILICON,NPN TRANSISTOR:SILICON,PNP TRANSISTOR:SILICON,PNP

TRANSISTOR:SILICON,NPN,SEL

TRANSISTOR:SILICON,NPN

Mfr

Code Mfr Part Number

07263 80009 80009 14433 07263 53944

80009 80009 80009

22526 47357 80009 131-0589-00

22526 47357

22526 47357 80009

80009 76493 03508

07263

80009 80009

80009

04713

FDH-6012 152-0686-00

152-0686-00 LG4016 FDH-6012 AlB-3

119-0181-00 119-0181-00 119-0181-00

120-1165-00 108-0337-00

02279

SC146DX176

S035928

151-0432-00 151-0208-02

151-0453-00

151-0136-03

ST1046

A3Q489

A3Q551 A3Q560

A3R103 A3Rl23 A3Rl24

A3Rl61

A3Rl85 A3Rl87 A3Rl88 A3R264 A3R285

A3R286 A3R325 A3R361 A3R381 A3R383 A3R386

A3R430

A3R454 A3R463

A3R477

A3R484 A3R485

151-0126-00 151-0323-00 151-0136-03 308-0237-00 308-0336-00 315-0331-00

308-0429-00 315-0104-00

315-0203-00 315-0622-00 316-0565-00 315-0512-00

315-0102-00 315-0101-00

308-0429-00

315-0474-00

315-0914-00

321-0441-00

315-0100-00

308-0574-00

308-0142-00

321-0229-00 321-0218-00

321-0412-00

321-0441-00

TRANSISTOR:SILICON,NPN TRANSISTOR:SILICON,NPN,SEL FROM MJE521

TRANSISTOR:SILICON,NPN,SEL

RES.,FXD,WW:8.2K OHM,5%,5W RES.,FXD,WW:7K OHM,5%,5W RES.,FXD,CMPSN:330 OHM,5%,0.25W

RES.,FXD,WW:22K OHM,1%,3W RES.,FXD,CMPSN:lOOK OHM,5%,0.25W RES.,FXD,CMPSN:20K OHM,5%,0.25W RES.,FXD,CMPSN:6.2K OHM,5%,0.25W RES.,FXD,CMPSN:5.6M OHM,10%,0.25W RES.,FXD,CMPSN:5.lK OHM,5%,0.25W

RES.,FXD,CMPSN:lK OHM,5%,0.25W RES.,FXD,CMPSN:100 OHM,5%,0.25W RES.,FXD,WW:22K OHM,1%,3W RES.,FXD,CMPSN:470K OHM,5%,0.25W RES.,FXD,CMPSN:910K OHM,5%,0.25W RES.,FXD,FILM:383K OHM,1%,0.125W

RES.,FXD,CMPSN:10 OHM,5%,0.25W RES, ,FXD,WW:10 OHM,5%,2W RES.,FXD,WW:30 OHM,5%,3W RES.,FXD,FILM:2.37K OHM,1%,0.125W

(670-6430-00, -01 ONLY) RES.,FXD,FILM:1.82K OHM,1%,0.125W

(670-6430-02 ONLY)

RES.,FXD,FILM:191K OHM,1%,0.125W

RES.,FXD,FILM:383K OHM,1%,0.125W

04713 04713 80009

14193

12697 01121

91637 01121 01121 01121 01121 01121

01121 01121 91637 01121 01121 91637

01121 CB1005 91637 RS2Bl62KlOROOJ 91637 RS2B-K30ROOJ 91637 MFF1816G23700F

91637 MFF1816Gl8200F

91637 MFF1816Gl9102F 91637 MFF1816G38302F

ST1046 SJE916 151-0136-03 SA50 OBD CB3315

RS2B-B22001F CB1045 CB2035 CB6225 CB5651 CB5125

CB1025 CB1015 RS2B-B22001F CB4745 CB9145 MFF1816G38302F

: 620-0295-00 POWER SUPPLY

REV DEC 1981

6-5

REPLACEABLE ELECTRICAL PARTS

A3 INVERTER (CONT)

Tektronix

Component No. Part No.

A3R486

A3R488 321-0227-00 A3R502 A3R531 A3R532 A3R537

A3R556 A3R561 A3R563 A3R565 A3R578 A3R579

A3R587 A3R588 A3R589 A3R591

A3RT231 A3Tl40

A3T540 A3U575 A3VR483 A3VR579

321-0228-00 308-0218-00

308-0441-00 315-0100-00 308-0441-00

308-0574-00 RES.,FXD,WW:10 OHM,5%,2W 91637 RS2Bl62KlOROOJ 315-0331-00

315-0331-00

315-0102-00

315-0201-00 315-0202-00

302-0222-00

315-0102-00 315-0302-00 311-1139-00 RES.,VAR,NONWIR:500 OHM,20%,0.50W 307-0746-00 120-1354-00

120-1119-01 156-0933-00 153-0058-00 152-0317-00

Serial/Model No.

Eff

Dscont

Name & Description

RES.,FXD,FILM:2.32K OHM,1%,0.125W RES.,FXD,FILM:2.26K OHM,1%,0.125W RES.,FXD,WW:150 OHM,5%,3W RES.,FXD,WW:3 OHM,5%,3W RES.,FXD,CMPSN:10 OHM,5%,0.25W RES.,FXD,WW:3 OHM,5%,3W 91637 CW2B-3ROOJ

RES.,FXD,CMPSN:330 OHM,5%,0.25W 01121 CB3315

RES.,FXD,CMPSN:lK OHM,5%,0.25W

RES. ,FXD,CMPSN:200 OHM,5%,0.25W 01121 CB2015 RES.,FXD,CMPSN:2K OHM,5%,0.25W 01121 CB2025

RES.,fXD,CMPSN:2.2 OHM,10%,0.50W

RES.,FXD,CMPSN:lK OHM,5%,0.25W 01121

RES.,FXD,CMPSN:3K OHM,5%,0.25W 01121

RES.,THERMAL:5 OHM,10%,7A/DEG C 15454

XFMR,PWR,STPDN:TRIGGER,LF 80009

TRANSFORMER,RF:BASE DRIVE

MICROCIRCUIT,LI:REGULATOR,PULSE WIDTH MOD

SEMICOND DVC,SE:ZENER,SEL,6.2V,5%,10MA SEMICOND DEVICE:ZENER,0.25W,6.2V,5%

Code Mfr Part Number

91637 91637 MFF1816G22600F

00213 1240S-150-5 91637 CW2B-3ROOJ 01121 CB1005

01121 CB1025

01121

73138

80009 120-1119-01 80009

80009 153-0058-00 04713 SZG20012

MFF1816G23200F

EB2221

CB1025 CB3025 72-43-0 SG-6 120-1354-00

156-0933-00

Mfr

6-6

REV DEC 1981

620-0295-00

POWER SUPPLY

REPLACEABLE ELECTRICAL PARTS

r

I

\

Tektronix

Component No.

A4 670-6429-00 CKT BOARD ASSY:REGULATOR 80009 670-6429-00

Part No.

Serial/Model No.

Eff Dscont

A4

REGULATOR

& Description Code Mfr Part Number

Name

Mfr

----- ----- (620-0295-00, -01 ONLY)

A4 670-6429-01

CKT BOARD ASSY:REGULATOR

80009

670-6429-01

----- ----- (620-0295-02 ONLY)

A4C54 290-0778-00 CAP.,FXD,ELCTLT:1UF,+50-10%,50V A4C55

A4C95 283-0024-00 A4Cl01 A4Cl02 A4Cll0 A4Cll5 290-0818-00 CAP. ,FXD,ELCTLT:390UF ,+100-10% ,40V 56289 A4Cll8

A4Cl25 A4Cl86 A4Cl95 A4Cl96 A4C218 A4C246

A4C247 A4C251 A4C285 A4C291 A4C296 A4C375

290-0754-00 CAP.,FXD,ELCTLT:2200UF,+75%-10%,10VDC 56289 432D222010AA2

283-0068-00 CAP.,FXD,CER DI:O.OlUF,+l00-0%,500V 283-0068-00 290-:-0798-00

290-0798-00 290-0818-00

283-0024-00 290-0770-00 CAP.,FXD,ELCTLT:100UF,+50-10%,25V 290-0770-00 CAP.,FXD,ELCTLT:100UF,+50-10%,25V 290-0750-00 290-0779-00

290-0524-00 290-0770-00 CAP.,FXD,ELCTLT:100UF,+50-10%,25V 56289 502D230 290-0782-00 CAP.,FXD,ELCTLT:4.7UF,+75-10%,35V 55680 35ULA4R7V-T 290-0844-00 CAP.,FXD,ELCTLT:lOOUF,-10+75%,35 WVDC 54473 ECE-A35VlOOL 290-0755-00 CAP.,FXD,ELCTLT:lOOUF,+50-10%,lOV 290-0776-00 CAP.,FXD,ELCTLT:22UF,+50-10%,10V 55680 10ULA22V-T

CAP.,FXD,CER DI:0.1UF,+80-20%,50V 72982 CAP.,FXD,CER DI:0.01UF,+100-0%,500V

CAP.,FXD,ELCTLT:l80UF,+100-10%,40V 56289 672Dl87H040DM5C CAP.,FXD,ELCTLT:180UF,+100-10%,40V 56289 6 72Dl87H040DM5C

CAP.,FXD,ELCTLT:390UF,+100-10%,40V 56289 672D397H040DS5C

CAP.,FXD,CER DI:0.1UF,+80-20%,50V

CAP.,FXD,ELCTLT:100UF,+50-10%,160V CAP.,FXD,ELCTLT:10UF,+50-10%,50VDC

CAP.,FXD,ELCTLT:4.7UF,20%,10V 90201 TDC4 7 5MO lOEL

54473 ECE-A50Nl

56289 56289 19C241

72982 8121N083Z5U0104Z 56289 502D230 56289 56289 D76244 56289

56289

8121N083Z5U0104Z 19C241

672D397H040DS5C

502D230

502D237

502D223

A4C385

A4C391 A4C392

A4C401 A4C402 A4C446 A4CR185 A4CR188 A4CR189

A4CR221 A4CR231 A4CR248 A4CR255 A4CR256 A4CR262

A4CR288

A4CR289 A4CR341 A4CR366 A4CR367 A4CR368

A4CR405 A4CR406 A4CR414

A4CR418

A4CR421

A4CR425

283-0203-00 CAP.,FXD,CER DI:0.47UF,20%;5ov 72982

8131N075E474M

----- ----- (670-6429-00 ONLY)

290-0183-00 CAP.,FXD,ELCTLT:1UF,10%,35V

90201

TAC105K035P02

----- ----- (670-6429-01 ONLY)

290-0408-01 CAP.,FXD,ELCTLT:lOOUF,+50-10%,100 W,VDC 55680 285-1133-00 CAP.,FXD,PLSTC:0.33UF,1%,100V 50558 MH12D334F

283-0000-00 283-0000-00 CAP.,FXD,CER DI:0.001UF,+100-0%,500V 59660 831-519-Z5U-102P 290-0758-00 CAP.,FXD,ELCTLT:2.2UF,+50-10%,160V 56289 152-0066-00 152-0066-00 152-0066-00

152-0655-00 152-0655-00 SEMICOND DEVICE:SILICON,100V,3A 03508 All5AX39 152-0333-00 152-0333-00 152-0333-00 SEMICOND DEVICE:SILICON,55V,200MA 07263 FDH-6012 152-0141-02

152-0066-00 152-0066-00 152-0141-02 SEMICOND DEVICE:SILICON,30V,150MA 01295 152-0141-02 152-0141-02 152-0141-02

152-0400-00 152-0400-00 152-0655-00 152-0686-00 SEMICOND DEVICE:RECT,SI,100V,5A 80009 152-0686-00 152-0686-00 152-0655-00

CAP.,FXD,CER DI:0.001UF,+100-0%,500V 59660

SEMICOND DEVICE:SILICON,400V,750MA 14433 LG4016 SEMICOND DEVICE:SILICON,400V,750MA 14433 LG4016 SEMICOND DEVICE:SILICON,400V,750MA 14433 LG4016

SEMICOND DEVICE:SILICON,100V,3A SEMICOND DEVICE:SILICON,55V,200MA 07263

SEMICOND DEVICE:SILICON,55V,200MA SEMICOND DEVICE:SILICON,30V,150MA SEMICOND DEVICE:SILICON,400V,750MA 14433 LG4016

SEMICOND DEVICE:SILICON,400V,750MA 14433 LG4016 SEMICOND DEVICE:SILICON,30V,150MA 01295 1N4152R

SEMICOND DEVICE:SILICON,30V,150MA 01295 1N4152R SEMICOND DEVICE:SILICON,30V,150MA

SEMICOND DEVICE:SILICON,400V,1A SEMICOND DEVICE:SILICON,400V,1A SEMICOND DEVICE: SILICON, lOOV, 3A

SEMICOND DEVICE:RECT,SI,100V,5A SEMICOND

DEVICE:SILICON,100V,3A 03508 All5AX39

03508 All5AX39

07263 FDH-6012

01295 1N4152R

80009 152-0400-00

03508 All5AX39

80009 152-0686-00

lOOELAlOO

831-519-Z5U-102P

502D227

FDH-6012

1N4152R

A4CR431 152-0661-00 SEMICOND DEVICE:RECT,SI,600V,3A,FAST

620-0295-00 POWER SUPPLY

REV DEC 1981

04713

MR856

6-7

REPLACEABLE ELECTRICAL PARTS

A4 REGULATOR (CONT)

Tektronix

Component No. Part No.

A4CR432 A4CR445

A4CR485 A4CR492 A4J71

152-0661-00 152-0061-00 152-0141-02 152-0141-02 13i-2427-00

----- -----

A4J72

131-2427-00

----- ----- (QUANTITY OF 2)

A4J73

131-0589-00 TERMINAL,PIN:0,46 L X 0.025

----- ----- (QUANTITY OF 10)

A4J74

131-0589-00

----- -----

A4J75

131-0608-00

----- -----

A4J76

131-0608-00

----- ----- (QUANTITY OF 2)

A4J77

131-0608-00

----- ----- (QUANTITY OF 2)

A4Ll A4Ll5 A4L30 A4L65 A4Ll87 A4L205

A4L231 A4Q238 A4Q239 A4Q240 A4Q251 A4Q271

108-1057-00 108-1017-00 COIL, RF: FXD, lMH 80009 108-1017-00 108-0860-00 108-1055-00 108-0509-00 COIL,RF:2.45UH 80009 108-0509-00 108-1056-00

108-0978-00 COIL,RF:FIXED,135UH 151-0443-00 151-0443-00 151-0188-00 TRANSISTOR:SILICON,PNP 151-0188-00 TRANSISTOR:SILICON,PNP 151-0250-00 TRANSISTOR:SILICON,NPN

Serial/Model No. Mfr

Eff Dscont Name & Description Code Mfr Part Number

SEMICOND DEVICE:RECT,SI,600V,3A,FAST SEMICOND DEVICE:SILICON,175V,100MA SEMICOND DEVICE:SILICON,30V,150MA 01295 SEMICOND DEVICE:SILICON,30V,150MA 01295 TERM,QIK DISC:CKT BD,BRASS

(QUANTITY OF 2)

TERM,QIK DISC:CKT BD,BRASS

SQ

TERMINAL,PIN:0.46 L X 0.025

(QUANTITY OF 4)

TERMINAL,PIN:0.365 L X 0.025 PH BRZ GOLD 22526

(QUANTITY OF 10)

TERMINAL,PIN:0.365 TERMINAL,PIN:0.365 L X 0.025 PH BRZ GOLD

COIL,RF:FIXED,830UH 80009 108-1057-00 COIL,RF:FIXED,605UH

COIL,RF:FIXED,6.lUH 80009 108-1055-00 COIL,RF:FIXED,2.lMH 80009 108-1056-00

TRANSISTOR:SILICON,PNP TRANSISTOR:SILICON,PNP 80009

L X 0.025 PH BRZ GOLD

SQ

04713 07263 FDH2161

00779 G2409-l

00779 G2409-l 80009 131-0589-00 80009 131-0589-00

22526

04713 SPS6868K 04713 SPS6868K

MR856

1N4152R 1N4152R

47357 47357

22526 47357

80009

80009 108-0978-00 80009

80009 151-0250-00

108-0860-00

151-0443-00 151-0443-00

A4Q351 A4Q377 A4Q378 A4Q436 A4Q455 A4Q461

A4R75 A4R76

A4R85

A4R86

A4Rl01 A4Rl02

A4Rl41 A4Rl42 A4Rl75 A4R235 A4R241 A4R242

A4R243 A4R244 A4R261

A4R263

A4R264

A4R265 A4R266

A4R272 A4R273

151-0188-00 151-0190-00 TRANSISTOR:SILICON,NPN 07263 S032677 151-0190-00 TRANSISTOR:SILICON,NPN 07263 S032677 151-0443-00 151-0190-00 151-0190-00

308-0087-00 308-0643-00 308-0463-00 308-0795-00 315-0100-00 315-0100-00

315-0101-00 321-0101-00 308-0643-00 315-04 71-00. 315-0271-00 321-0227-00

321-0097-00 321-0318-00 315-0182-00

321-0231-00 315-0241-00 315-0242-00

321-0358-00

321-0347-00

322-0341-00

TRANSISTOR:SILICON,PNP 04713 SPS6868K

TRANSISTOR:SILICON,PNP TRANSISTOR:SILICON,NPN 07263 S032677

TRANSISTOR:SILICON,NPN

RES.,FXD,WW:0,5 OHM,1%,lW

RES.,FXD,WW:0.1 OHM,3%,3W

RES.,FXD,WW:0.3 OHM,1%,3W RES.,FXD,WW:0.2 OHM,5%,3W 91637 RS2BR2000J

RES.,FXD,CMPSN:10 OHM,5%,0.25W 01121 CB1005

RES.,FXD,CMPSN:10 OHM,5%,0.25W 01121

RES.,FXD,CMPSN:100 OHM,5%,0.25W 01121

RES.,FXD,FILM:110 OHM,1%,0.125W 91637 RES. ,FXD,WW:0.1 OHM,3%,3W 91637 RES.,FXD,CMPSN:470 OHM,5%,0.25W RES.,FXD,CMPSN:270 OHM,5%,0.25W RES.,FXD,FILM:2.26K OHM,1%,0.125W 91637 MFF1816G22600F

RES.,FXD,FILM:100 OHM,1%,0,125W RES.,FXD,FILM:20K OHM,1%,0.125W RES.,FXD,CMPSN:l.8K OHM,5%,0.25W 01121 CB1825 RES. ,FXD,FILM: 2 .49K OHM, 1% ,0.125W RES.,FXD,CMPSN:240 OHM,5%,0.25W RES.,FXD,CMPSN:2.4K OHM,5%,0,25W

RES.,FXD,FILM:52.3K OHM,1%,0.125W

RES.,FXD,FILM:40.2K OHM,1%,0.125W RES.,FXD,FILM:34.8K OHM,1%,0.25W 75042 CEBT0-3482F

80009 151-0443-00

07263 S032677

80009 308-0087-00

91637 RS2B-ER1000H

91637 RS2B-KR3000F

CB1005 CB1015

MFF1816Gll0ROF

01121 CB4715 01121 CB2715

91637 91637 MFF1816G20001F

91637 01121 CB2415 01121 CB2425

91637 MFF1816G52301F

91637

RS2B-ER1000H

MFF1816GlOOROF

MFF1816G24900F

MFF1816G40201F

6-8

REV DEC 1981

620-0295-00 POWER SUPPLY

Tektronix 620-0295-00 Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual