Agilent E4351B Service Manual

Addendum A - SERVICE MANUAL

Agilent Technologies Model E4350B and E4351B Solar Array Simulators - P/N 5962-8233

For units with serial numbers:

E4350B US37410101 and up E4351B US37430101 and up

Foreword

This addendum contains information for troubleshooting and repairing the Agilent E4350B and E4351B Solar Array Simulators. The standard Service Manual for the Agilent Series 665xA DC Power Supplies (P/N 5959-3376), together with this Service Addendum, is shipped with the Solar Array Simulators when ordered with Option 910.

Note This addendum is to be used along with the standard Service Manual for the Agilent Series 665xA

DC Power Supplies. When troubleshooting the Agilent E4350B/E4351B Solar Array Simulators, start by following the procedures outlined in the standard Service Manual. This addendum documents only the differences between the standard troubleshooting procedures and the troubleshooting procedures for a Solar Array Simulator.

Areas of Difference

From a service point of view, the main difference between the SAS unit and the Agilent Series 665xA dc power supply is the addition of a Digital Signal Processor (DSP) board located over the main A1 board. This DSP board includes the portions of CV, CC, OV, and OC control circuits such as the programming DAC circuits, as well as a microprocessor and programmable gate array that is used to generate the output I-V curve. The output I-V curve simulates the output characteristics of a solar array.

The areas in the standard service manual that are changed by this addendum are:

• Test Equipment Required (Table 2-1)

• Basic Test Setup (Figure 2-1)

• Voltage and Current Values (Table 2-3)

• CC RMS Noise Measurement Setup (Figure 2-3)

• Performance Test Record (Table 2-15)

• Self-Test Error Codes/Messages (Table 3-2)

• Troubleshooting Flowcharts (Figures 3-2, 3-5 through 3-9)

• Initialization Program Listing (Figure 3-17)

• Cable and Connector Locations (Figure 3-18)

• Disassembly Procedures for A5 DSP Board (page 3-50)

• Digital Signal Processor (DSP) Board (page 4-14)

• Simplified Power/Control/DSP Circuits (Figure 4-9)

• Parts list (Tables 5-6, 5-7, 5-9 through 5-12)

• Test Points (Table 6-3)

• Schematic Diagrams (Figures 6-5, 6-6, 6-7, 6-10, 6-11, 6-12)

Service Addendum 1

Table of Contents

Addendum A - SERVICE MANUAL................................................................................................................................1

Foreword........................................................................................................................................................................1

Areas of Difference........................................................................................................................................................1

Table of Contents...........................................................................................................................................................2

Chapter 1 Differences.....................................................................................................................................................3

Chapter 2 Differences.....................................................................................................................................................3

Test Equipment Required...........................................................................................................................................3

Measurement Techniques...........................................................................................................................................4

Basic Test Setup.........................................................................................................................................................4

Voltage and Current Values.......................................................................................................................................5

Transient Recovery Time...........................................................................................................................................5

CC RMS Noise Measurement Test Setup..................................................................................................................5

Performance Test Record...........................................................................................................................................6

Chapter 3 Differences.....................................................................................................................................................8

Signature Analysis .....................................................................................................................................................8

Self-Test Error Codes/Messages................................................................................................................................8

Overall Troubleshooting (sheet 1)..............................................................................................................................9

Overall Troubleshooting (sheet 2)............................................................................................................................10

Overall Troubleshooting (sheet 3)............................................................................................................................11

Overall Troubleshooting – sheet 4...........................................................................................................................12

Overall Troubleshooting (sheet 5)...........................................................................................................................13

Flow Charts -............................................................................................................................................................13

No Display Troubleshooting....................................................................................................................................14

OV Will Not Fire Troubleshooting..........................................................................................................................15

OV at Turn-On Troubleshooting..............................................................................................................................16

Output Held Low Troubleshooting (sheet 1)...........................................................................................................17

Output Held Low Troubleshooting (sheet 2)............................................................................................................18

Output Held High Troubleshooting..........................................................................................................................19

Initialization and Factory Preset Replacement Program Listing (sheet 1) ...............................................................20

Initialization and Factory Preset Replacement Program Listing (sheet 2) ...............................................................21

Initialization and Factory Preset Replacement Program Listing – (sheet 3)............................................................22

Cable and Connector Locations ............................................................................................................................... 23

Chapter 4 Differences...................................................................................................................................................25

Digital Signal Processor (DSP) Board .....................................................................................................................25

Simplified Diagram of DSP Circuits........................................................................................................................26

Chapter 5 Differences...................................................................................................................................................27

Chapter 6 Differences...................................................................................................................................................43

Test Points................................................................................................................................................................43

Figure 6-5. A1 Main Board Component Location Coordinates for E4350B................................................................47

Figure 6-5. A1 Main Board Assembly Drawing and Test Points for E4350B.............................................................47

Figure 6-5. A1 Main Board Schematic Diagram for E4350B (sheet 1 of 4)................................................................47

Figure 6-5. A1 Main Board Schematic Diagram for E4350B (sheet 2 of 4)................................................................47

Figure 6-5. A1 Main Board Schematic Diagram for E4350B (sheet 3 of 4)................................................................47

Figure 6-5. A1 Main Board Schematic Diagram for E4350B (sheet 4 of 4)................................................................47

Figure 6-6. A4 Left Tunnel Circuit Component Loca tions for E4350B ...................................................................... 47

Figure 6-6. A4A1/A4A3 Left Tunnel Circuit Schematic Diagrams for E4350B.........................................................47

Figure 6-7. A4 Right Tunnel Circuit Component Locations for E4350B....................................................................47

Figure 6-7. A4A2/A4A4 Right Tunnel Circuit Schematic Diagrams for E4350B.......................................................47

Figure 6-10 A5 DSP Board Test Points.......................................................................................................................47

Figure 6-11 A6 Adapter Board Schematic Diagram....................................................................................................47

Figure 6-12 A7 Phone Adapter Board Component Location and Schematic Diagram................................................47

Service Addendum2

Chapter 1 Differences

Firmware Revisions

The Agilent E4350B/E4351B SAS firmware resides in the front panel board’s ROM chip (A3U4), the GPIB board’s ROM chip (A2U106), and in the DSP board’s ROM chips (A5U734 and A5U735). Use the *IDN query as described in chapter 3 of the Service Manual to get the firmware revision numbers.

Chapter 2 Differences

Test Equipment Required

Table 2-2. Test Equipment Required for Verification

Type Required Characteristics Recommended Model

Current Monitor Resistor 15A (0.1 Ohm) +/- 0.04% Guildline 9230/15 DC Power Supply 5V @ 10A Agilent 6642A, 6653A Digital Voltmeter Resolution: 10 nV @ 1 V

Readout: 8 1/2 digits Accuracy: 20 ppm

Electronic Load Voltage and current range must

exceed range of supply under test. Power range: 500 W min.

GPIB Controller Full GPIB capabilities HP Series 300 Load Resistor (for CC rms ripple and noise tests)

Oscilloscope Sensitivity: 1 mV

RMS Voltmeter True rms bandwidth: 20 MHz

Variable-Voltage Transformer Adjustable from -13% to +6% of

2 – 16 Ohm 300W (adjusted for 15 Ohm each connected in parallel or series) 1 – 1.6 Ohm 300W

Bandwidth limit: 20 MHz Probe: 1:1 with RF tip

Sensitivity: 100 uV

input range. Power: 1 kVA min.

Agilent 3458A

Agilent 6050A mainframe with Agilent 60504A (60 V) plug-in module, or Agilent 60504A-J10 (120 V) plug-in module.

Ohmite E300K16R

Ohmite E300K1R6 Agilent 54504A

Agilent 3400B

Superior Electric 0 to 280 Vac, 7.5 A (226U) 0 to 140 Vac, 15 A (126U)

Service Addendum 3

Measurement Techniques

Note All tests are performed in the FIXED as shown in Figure 2-1.

• Measure the DC voltage directly at the +S and -S terminals.

• Set the SENSE switch at the back of the supply to the Remote position.

• Connect the remote sensing leads from +OUT to +S, and from -OUT to -S.

• Use adequate wire gauge for the load leads as described in Chapter 4 of the Operating Manual.

Basic Test Setup

TO OSCILLOSCOPE OR RMS VOLTMETER

VP I P

IM-IMIP

+240 VDC MAX

+S-

LOCAL

REMOTE

SET TO REMOTE

120 uF, 100 V

ELECTRONIC

LOAD

CURRENT MONITORING

RESISTOR

(GUILDLINE 0.1 OHM,

15 A, 0.04%)

* USE DC POWER SUPPLY

(SAME POLARITY CONNECTIONS)

FOR -CC TEST

Figure 2-1. Basic Test Setup

TO DVM

TO DVM OR

RMS VOLTMETER

(CC TESTS)

Service Addendum4

Voltage and Current Values

Table 2-3. Voltage and Current Values

Agilent Model Full-scale

Voltage E4350B E4351B

60V 61.5V 8A 8.16A 73.0V

120V 123V 4A 4.08A 140V

Max. Prog.

Voltage

Full-scale

Current

Transient Recovery Time

This test does not need to be performed on the Agilent E4350B.

CC RMS Noise Measurement Test Setup

IM-IM

+240 VDC MAX

VP I P

+S-

Max. Prog.

Current

LOCAL

REMOTE

Max. Prog.

Overvoltage

SET TO REMOTE

MONITOR

RESISTOR 1.6 OHM

(Adjusted to 1 Ohm +/- 1%)

LOAD RESISTOR

E4350B 2 16 Ohm resistors in parallel (Adjusted to 7 Ohms +/- 1%)

E4351B 2 16 Ohm resistors in series (Adjusted to 25 Ohms +/- 1%)

Figure 2-3. CC RMS Noise Measurement Test Setup

Service Addendum 5

RMS

VOLTMETER

Performance Test Record

Table 2-15A. Performance Test Record for Agilent Model E4350B

Agilent E4350B Report No.______________ Date _________________

Test Description Minimum Spec. Result * Maximum Spec. Measurement

Uncertainty

Constant Voltage Tests Voltage Programming and Readback Accuracy

Low Voltage (set to 0V) V Readback Accuracy

out1

-10mV

– 42mV

_________ mV _________ mV

out1

+10mV

+ 42mV

1.5µV 2µV

High Voltage (set to 60V) V

out2

Readback Accuracy

Load Effect

Source Effect

PARD (Ripple & Noise)

Peak to Peak RMS

Current Programming and Readback Accuracy

Low Current (set to 0A) Iout1 Readback Accuracy

High Current (set to 8A) Iout2 Readback Accuracy

Current Sink (Isink = 1.8A) Readback Accuracy

PARD (Ripple & Noise)

RMS SAS Mode ** RMS Peak to Peak

59.945V

out2

– 2mV

– 90mV

0 0

__________ V _________ mV

_________ mV

_________ mV _________ mV

60.055V

out2

+ 2mV

95mV 12mV

+ 90mV

Constant Current Tests

– 20mA

– 28mA

out1

7.964A 8.036A – 44mA

out2

Isink – 54mA Isink + 54mA

0 0

_________ mA _________ mA

__________ A _________ mA

_________ mA

_________ mA _________ mA

out1

out2

+20mA

+ 28mA

+ 44mA

2.4mA

4mA

32mA

845µV 845µV

40µV

840µV

2.1mV

0.5µA 20µA

3.3mA

1mA

1.8mA

270µA

2.6mA

Load Effect

Source Effect

– 1mA

_________ mA

+ 1mA

* Enter your results in this column ** PARD (Optional Test in SAS mode)

Program I – V Curve: I

= 8A I

= 7.5A V

= 60V V

= 65V RL = 8 Ohms.

Use Fig 2-3 with scope across monitoring resistor for P-P ripple or RMS voltmeter for RMS.

Service Addendum6

3.4µA

Table 2-15B. Performance Test Record for Agilent Model E4351B

Agilent E4351B Report No.______________ Date _________________

Test Description Minimum Spec. Result * Maximum Spec. Measurement

Uncertainty

Constant Voltage Tests Voltage Programming and Readback Accuracy

Low Voltage (set to 0V) V Readback Accuracy

out1

-20mV

– 84mV

_________ mV _________ mV

+20mV

out1

+ 84mV

1.7µV

High Voltage (set to 120V) V

out2

Readback Accuracy

Load Effect

Source Effect

PARD (Ripple & Noise)

Peak to Peak RMS

Current Programming and Readback Accuracy

Low Current (set to 0A) Iout1 Readback Accuracy

High Current (set to 4A) Iout2 Readback Accuracy

Current Sink (0.9A) Readback Accuracy

PARD (Ripple & Noise)

RMS SAS Mode ** RMS Peak to Peak

119.89V

– 180mV

out2

– 2mV

0 0

Constant Current Tests

– 10mA

– 14mA

out1

3.982A

– 22mA

out2

Isink – 27mA

0 0

__________ V _________ mV

_________ mV

_________ mV _________ mV

_________ mA _________ mA

__________ A _________ mA

_________ mA

_________ mA _________ mA

120.11V

+ 180mV

out2

+ 2mV

95mV 12mV

+ 10mA

+ 14mA

out1

4.018A

+ 22mA

out2

Isink + 27mA

2.4mA

4mA

32mA

1.7mV

230µV

3mV

1.5mV

16µA 16µA

0.6mA

120µA

270µA

2.6mA

Load Effect

Source Effect

– 1mA

_________ mA

+ 1mA

* Enter your results in this column ** PARD (Optional Test in SAS mode)

Program I – V Curve: I

= 4A I

= 3.75A V

= 120V V

= 130V RL = 32 Ohms.

Use Fig 2-3 with scope across monitoring resistor for P-P ripple or RMS voltmeter for RMS.

Service Addendum 7

2.2µA

Chapter 3 Differences

Signature Analysis

Signature analysis (SA) troubleshooting for the secondary circuits on the A1 main circuit board is ++NOT++ available for the Agilent E4350B unit. However, GPIB and front panel signature analysis is available as described in chapter 3 of the Service Manual.

Self-Test Error Codes/Messages

Code/Message Description Probable Cause

Table 3-2. Self-Test Error Codes/Messages

E1 FP RAM E2 FP ROM E3 EE CHKSUM

E4 PRI XRAM E5 PRI IRAM E6 PRI ROM E7 GPIB E8 SEC RAM E9 SEC ROM E10 SEC 5 V E11 TEMP E12 DACS E30 SEC DAC E31 SEC DAC E32 SEC DAC E45 SEC IO E46 SEC NVRAM

Front panel RAM test failed Front panel ROM test failed Front panel EEPROM checksum failed

Primary interface external RAM test failed Primary interface internal RAM test failed Primary interface DOM test failed GPIB interface test failed Secondary interface RAM test failed Secondary interface ROM test failed Secondary interface 5 volt readback test failed Ambient temperature readback test failed CV or CC DAC test failed Secondary interface DAC test failed Secondary interface DAC test failed Secondary interface DAC test failed Secondary interface I/O test failed Secondary interface nonvolatile RA M test fail ed

Microprocessor A3U3 defective ROM A3U4 or address latch A3U8 defective Possibly due to power loss during a write operation. See

checksum Error Recovery on page 3-3 in the Operating manual. If power loss is not the problem, EEPROM A3U6 could be defective (after replacing U6, supply must be initialized and calibrated).

A2 GPIB board defective A2 GPIB board defective A2 GPIB board defective Talker/Listener chip A2U117 defective A5 DSP board defective A5 DSP board defective A5 DSP board defective A5 DSP board defective A5 DSP board defective A5 DSP board defective A5 DSP board defective A5 DSP board defective A5 DSP board defective A5 DSP board defective

Note: The following error messages can appear due to a failure occurring either while the power supply is operating or during self test. SERIAL TIMEOUT SERIAL DOWN UART PARITY UART FRAMING UART OVERRUN SBUF OVERRUN SBUF FULL STK OVERFLOW EE WRITE ERR SECONDARY DN

Serial data line failure on GPIB board Serial data line failure on GPIB board Uart failed on GPIB board Uart failed on GPIB board Uart failed on GPIB board Serial buffer failure on GPIB board Serial buffer failure on GPIB board Stack overflow failure on DSP board EEPROM write failure on front panel board Serial data line failure on DSP board

A2 GPIB board defective A2 GPIB board defective A2 GPIB board defective A2 GPIB board defective A2 GPIB board defective A2 GPIB board defective A2 GPIB board defective A5 DSP board defective EEPROM A3U6 defective or calibration error A5 DSP board defective

Service Addendum8

Overall Troubleshooting (sheet 1)

Start "Overall

Troubleshooting"

Turn off supply, disconnect the load and push the sense

switch on the rear panel in (local). Turn on the supply

Display On?

Yes

Fan on?

No No

Fan On?

Yes

Go to "No Display"

Troubleshooting

1. Check ac input and line cord

2. Check line fuse

3. Turn off supply, remove top cover, check line voltage select jumpers on T1.

4. Tur n on supply, chec k ac power and ac bias voltages at T1 secondary

Turn off the supply and remove top cover to access the A1 board. Turn on the supply and check voltage at heatsink of A1Q770 (TP 12) with respect to common (TP 9). See Fig 6-5 Sheet 1.

Yes

Error message

displayed

Using front panel keys, program full scale voltage and current. Check the

voltage at the supply’s output

terminals with a DMM.

Output voltage

within spec

Yes

See "Self Test Error

Codes/Messages",

Table 3-2

To Sheet 4

1. Check ac bias voltage at T1 secondary and cable W7. See Fig 6-2 in 665xA service manual.

A1Q700 Heatsink

+24V?

Yes

1. Check Fan B1 and cable connection to A1J601

2. Check fan speed control circuit A1Q700, A1U702 and associated components. See Fig 6-5 sheet 1.

2. Check A1F700, 701, D702705, C711 and R709.

To Sheet 2

Figure 3-2. Overall Troubleshooting (sheet 1 of 5)

Service Addendum 9

Overall Troubleshooting (sheet 2)

From Sheet 1

Voltage display

within spec

Reads approx. right

but outside spec

Check cables from A1

A5J722-1 (Vmon)

approx. 4.1V

YesYes

main board to A5 DSP

board.

Yes

Annunciator

on ?

Yes

Turn off the supply and connect a short across the output terminals. Turn on and program full scale voltage and current using front panel keys. Check output current with an external ammeter.

Output current

within spec?

Yes

Current display

within spec?

Calibrate the supply. See

Appendix A in the Operating

No No No

See CV/CC Status Annunciator

Troubleshooting" paragraph

manual.

To Sheet4

Reads approx.

right but outside

spec?

Voltage readback circuit on

A5 DSP board defective.

A5J722-3 (Imon)

approx. 4.4V

Check cables from A1

Main board to A5 DSP

Yes

CC Annunciator

on ?

Yes

To Sheet3

Yes Yes

Calibrate supply. See Appendix A in

the Operating manual.

Current readback circuit on

A5 DSP board defective

Current readback circuit on

A5 DSP board defective

Figure 3-2. Overall Troubleshooting (sheet 2 of 5)

Service Addendum10

Overall Troubleshooting (sheet 3)

From Sheet 3

Turn off the supply and remove the short from the

output. Turn on and program output voltage and

current to full scale and the OV to zero using front

panel keys. Check that the supply goes into OV

condition (OV Prot annunciator on and output at 0)

Did OV occur?

Yes

Turn off the supply and connect a GPIB

controller to the supply. Turn on the supply and

using the controller, program the supply to full

scale voltage and current. Check that the supply

accepts the commands and can be programmed

down rapidly.

Does supply accept

commands ?

Yes

Down Programming

Go to "Slow Down Programming"

troubleshooting Fig. 3-15

Go to "OV Will Not Fire"

Troubleshooting

1. Check GPIB cable

2. Check A2J115, J117 and J120

Yes

Check Primary Interface A2

U113, U114, U118.

Check operation of the Digital Control Port (See Appendix A of the Operating manual),

Serial Link (See Chapter 4 in Operating

manual) and the front panel voltage/current

rotary controls (See Chapter 5 in the Operating

manual).

Digital Control Port

Yes

Check A2U109, U114.

Check Voltage and Current

controls (A3G1 & G2).

No problem found. Perform

Verification tests in Chapter 2 to

determine if a problem exists

Figure 3-2. Overall Troubleshooting (sheet 3 of 5)

Service Addendum 11

Serial Link

Yes

Rotary Controls OK

Yes

Overall Troubleshooting – sheet 4

B From Sheet 1

From Sheet 2

Output voltage

approx. right but

outside spec

PROT

annumciator on

Yes

Press PROT key

Calibrate the supply. See Appendix

A in the Operating manual.

Display reads

approx. output

voltage

Yes

Display reads

approx. 0 Amps

Yes

Check Voltage Monitor

circuit A1U605

Output shorted

Check Current Monitor

circuit A1U605

YesYes

Output current

approx. right but

outside spec

Check output for

Yes

shorted circuits

Yes

Display reads

approx. output

current

displayed

Output low

Go to "Output Held Low"

troubleshooting.

Yes Yes

Go to Sheet 5

Go to "Output Held Low"

Yes

A5J722-31

Therm Heatsink

3.2V @ 23C

Check +5V Ref,

A1R510,right tunnel board

A4RT301 (10K @ 23C)

Figure 3-2. Overall Troubleshooting (sheet 4 of 5)

troubleshooting.

Replace A5 DSP board

Service Addendum12

Overall Troubleshooting (sheet 5)

E From Sheet 4

Programmable OCP tripped, Check OV & OC displayed

Yes

OC circuits A1U405, U411, Imon

amp A1U403 and OC_PROG signal

at A5J722-26 (TP41)

displayed

RI (Remote Inhibit)

displayed? Check for short

between A2TB101 and

ground.

Figure 3-2. Overall Troubleshooting (sheet 5 of 5)

Yes

Go to "OV at Turn-On"

troubleshooting.

Check if OCP is enabled at turn-on

and current is programmed to zero.

Check current circuit.

Flow Charts -

The flow charts shown in Figures 3-10 through Figures 3-14 and Figure 3-16 are not used in troubleshooting the Solar Array Simulator.

Note that there are no changes to the flow chart in Figure 3-15.

Service Addendum 13

No Display Troubleshooting

"No Display"

Start

Turn on the supply and try to program it from the front panel. While measuring the voltage at the output terminals, program the voltage and current to full scale. Toggle the ON/OFF key while observing the external voltmeter.

No display but output

Yes

Turn off supply, remove front panel assembly to access circuits on the A3 front panel board. Turn on the supply.

Check 5V bias at R1-6, display voltages:

1.1V at R1-14, 2.2V at R1-2 and 3.3V at R1-16 (meter common at R1-3). See Fig. 6-4.

Display and bias

voltages OK

Yes

Check 10MHz Clock signal at A3J2-9. See Fig. 6-9.

Check the A2 GPIB board, bias circuits,

PCLR (test points 1 - 4 Table 6-3) and cable W9

Check A3C1, A3R1 and A3RT1.

Yes

Program voltage and current fron the front panel. Measure the voltage at the output terminals. In case the output is disabled press the output ON/OFF key while observing the output with an external voltmeter.

Display and bias

voltages OK

A3U3, A3U4 or A3U8

Check A3Y1,

A3C3, A3C4 and A3U3.

defective. Perform front panel SA. See Table 3-4.

Figure 3-5. No Display Troubleshooting

Service Addendum14

Output Voltage present

LCD or cable W19 defective.

Yes

OV Will Not Fire Troubleshooting

"OV Will Not Fire"

Start

Turn off supply and remove top cover. Turn on and check secondary bias and reference voltages. (Test Points 9 through 17, Table 6-3)

Voltages OK

Yes

Program voltage and current to full scale and OV to 1/2 full scale. Check voltage at A5 J72222 (TP40), A1U405 and A1U602 with respect to common (TP9).

J722-22 approx. 2.7V

Yes

A1U405-7 approx. 0V

Yes

Troubleshoot the appropriate defective circuit.

Replace A5 DSP boardNo

Check A1R644, R747 and C417. Voltage at A1U603-7 should be approx. 2V.

Check voltage at A1U405-5 with respect to common (TP9)

Yes

A1U405-5 Negative

A12U602-6 approx.

Yes

Check voltage across A1R516

Yes

A1U602-6 approx. 5V

Yes

Check A1Q701 and CR700.

Check A5 J721-12. If not 5V,

replace A5 DSP board. If 5V check A1U602 and DSP cable.

Check A1U410, Q701

(B-E short?)

Figure 3-6. OV Will Not Fire Troubleshooting

Service Addendum 15

Yes

Check A1U405.

OV at Turn-On Troubleshooting

"OV at Turn-On"

Start

Check that the supply is not programmed to OV at turn-on. Ensure that the voltage setting is not greater than the OV setting. Program 0V and Max. OV, then save the settings in Register 0 (press shift, save, 0 and Enter key). Turn the supply off then back on.

Connect a DC coupled scope across the output terminals. Turn the supply on and check that the output does not momentarily go higher than the voltage setting.

Momentarily goes high

Turn off the supply and remove the top cover. Disable the OV circuit by lifting A1R447. Turn on the supply and check the output voltage.

Yes

Output high

Yes

Caution: During these tests, the output may be at hazardous levels.

Yes

Go to "Output Held High"

Troubleshooting

Yes

OV still ocurrs

Check voltages at A1U405-7 (TP44), U603-5 (TP17, U405-5 (TP42) and U405-3 (TP41) to Common (TP9). See Table 6-3.

A1U405-7 approx 5V

Yes

Figure 3-7. OV at Turn-on Troubleshooting

Check A1R447,

R446, C417

Check A1U411.

Check A1U405.

Check A1R644,

C417.

Yes

A1U405-7 approx 5V

Replace A5 DSP board

Service Addendum16

Output Held Low Troubleshooting (sheet 1)

"Output Held Low"

Start

The supply’s output is low and the PROT annunciator is not on. Turn supply off, disconnect the load and remove the top cover. Turn the supply on and check the secondary bias and reference voltages (TP’s 9 through 12 See Table 6-3).

Voltages OK

Yes

Check that the +Rail and -Rail Voltages are correct. See Fig. 6-5, Sheet 1.

Rail Voltages OK

Yes

Program full scale voltage and current, measure output with an external DMM to insure the problem is no a power supply readback problem. Check voltages is approximately -4 volts at A5J722-15 (TP25) and A5J722-16 (TP24) with respect to commmon (TP9).

Caution: During these tests, the output may be at hazardous levels.

Troubleshoot the defective

curcuit. See Fig. 6-5 Sheet 1.

Check power xfmr T1 ac

voltages, input rectifiers and

filter caps. See Fig. 6-5 Sheet 1

Voltages OK

Yes

Check if CV/CC "OR" Gate diodes

A1D441 or D413 are conducting.

A1D411 Conducting

To Sheet 2

Figure 3-8 Output Held Low Troubleshooting (Sheet 1 of 2)

Replace A5 DSP Board

Check Vmon voltage at

A1U401-7 (TP33) to

common (TP9).

Yes

CV Comparator

A1U408

A1D411 Conducting

VMon Amp A1U401

defective

Service Addendum 17

Output Held Low Troubleshooting (sheet 2)

From Sheet 1

A1D413 Conducting

Yes

Check voltage at A1U408-3 and R686 (TP36) to common (TP9).

A1U408-3 Neg

A1R638 > 12mV

Yes

Check if supply operates OK with

no load but cannot get full scale

output with load connected.

Yes

Check IMon voltage at A1U403-7

(TP28) to common (TP9).

A1D413 Conducting

IMon Amp A1U403 defective.

Gross Current Limit circuit A12U409

Yes

Check A1U408, D420, loading of

voltage by Tunnel Circuits.

defective.

Disconnect cables from tunnel boards

A4A1-A4A4 one at a time to see if

output rises.

Yes

CC Comparator A1U403 defective.

Partial output attained

Check Gated +9V and Shutdown

circuit. See Test Points 18-21, Table

6-3 and Figure 6-5 Sheet 2.

Figure 3-8 Output Held Low Troubleshooting (Sheet 2 of 2)

Output Rises

Check A1U408 and D420

Disconnect cables from Tunnel

boards one at a time to see if one has

Yes

little or no effect. Troubleshoot or

replace the defective board.

Service Addendum18

Troubleshoot or replace defective

Yes

tunnel board.

Output Held High Troubleshooting

"Output Held High"

Start

Turn supply off and remove the top cover. Disable the Overvoltage circuit by shorting A1U410 pins1 & 2 and lifting A1R447. Turn the supply on and check the secondary bias and reference voltages (TP’s 9 through 12 See Table 6-3).

Caution: During these tests, the output may be at hazardous levels.

Voltages OK

Yes

Program voltage and current to 1/2 full scale. Check voltage at A5J722-15 (TP25) and A5J722-16 (TP24) to common (TP9). Voltages should be approximately -2V.

Voltages OK

Yes

Check if CV "OR" gate diode A1D411 is conducting.

A1D411 Conducting

Yes

Check output control voltage at

A1R638 (TP36) to common (TP9).

A1R638 approx. 12mV

Troubleshoot the defective

curcuit. See Fig. 6-5 Sheet 1.

Replace A5 DSP board

Check A1U408, D411

Yes

Load output to 5% rated current

and check drop across emittor resistors on left boards A4A1 & A4A2 (R201, R206, R216) and on right boards A4A2 & A4A4 (R301, R306, R311, R316) to help isolate defective stage (see Fig 6-6 and 6-7). A defective stage will be conducting more current.

Disconnect cables from Top

Tunnel boards A4A1 and

A4A2.

Output OK

Reconnect top tunnel

boarda and disconnect

cables from Top Tunnel

boards A4A3 and A4A4.

Check A1U408, U409

Reconnect Tunnel boards

one at a time to isolate

defective board.*

Yes

Check A1U408. Voltage at

A1R511 should be >8V.

Figure 3-9. Output Held High Troubleshooting

Service Addendum 19

Output OK

Initialization and Factory Preset Replacement Program Listing (sheet 1)

10 ! Program to initialize EEPROM data in Models E4350B and E4351B 20 ! RE-STORE "INIT_435X" 30 ! Rev A.00.00 dated Nov, 17,1998 40 ! 50 DIM Init_data(1:49),Model$[6],Idn$[21] 60 INTEGER Addr(1:49),Length(1:49) 70 ASSIGN @Ps TO 705 ! Supply must be at address 705 80 CLEAR SCREEN 90 ! 100 Eprom_data_addr: ! Data address 110 DATA 2,6,10,14,18,19,20,24,28,32 120 DATA 36,37,38,42,46,50,54,55,56,57 130 DATA 64,68,72,76,80,84,88,92,96,100 140 DATA 136,137,138,139,140,142,146,148,149,150 150 DATA 151,152,153,154,155,156,157,158,160 160 ! 170 Eprom_data_len: ! Data for word length 180 DATA 4,4,4,4,1,1,4,4,4,4 190 DATA 1,1,4,4,4,4,1,1,1,1 200 DATA 4,4,4,4,4,4,4,4,4,4 210 DATA 1,1,1,1,2,4,2,1,1,1 220 DATA 1,1,1,1,1,1,1,2,1 230 ! 240 Eprom_data_50B: ! ! EEPROM data for E4350B 250 DATA 56.71,76.42,61.5,0,82,0,409.6,148.05,8.16,0 260 DATA 99,3,9.321,27,73,0,83,255,20,10 270 DATA 4350,54.39,167,436.44,167,0,10.0,10.0,65,1600 280 DATA 5,255,0,0,17,4350,0,20,160,20 290 DATA 160,156,37,98,115,15,20,0,96 300 ! 310 Eprom_data_51B: ! ! EEPROM data for E4351B 320 DATA 28.36,40.96,123.0,0,0,82,0,819.2,283.57,4.08,0 330 DATA 99,3,5.121,27,140,0,83,255,20,10 340 DATA 4351,27.19,167,872.89,167,0,5.0,5.0,130,400 350 DATA 5,255,0,0,17,4351,0,20,160,20 360 DATA 160,156,37,98,115,15,20,0,96 370 ! 380 RESTORE Eprom_data_addr 390 ! 400 FOR I=1 TO 49 410 READ Addr(I) 420 NEXT I 430 ! 440 RESTORE Eprom_data_len 450 ! 460 FOR I=1 TO 49 470 READ Length(I) 480 NEXT I 490 ! 500 INPUT "Input the model number (i.e. E4350B)",Model$

Figure 3-17. Initialization and Factory Preset Replacement Program Listing (Sheet 1 of 3)

Service Addendum20

Initialization and Factory Preset Replacement Program Listing (sheet 2)

510 CLEAR SCREEN 520 ! 530 SELECT Model$ 540 CASE "E4350B" 550 RESTORE Eprom_data_50B 560 CASE "E4351B" 570 RESTORE Eprom_data_51B 580 CASE ELSE 590 DISP "Error in Model number, must be E4350B or E4351B." 600 STOP 610 END SELECT 620 ! 630 FOR I=1 TO 49 ! Read model dependent data 640 READ Init_data(I) 650 NEXT I 660 ! 670 OUTPUT @Ps;"*CLS" ! Clears power supply registers 680 ! 690 OUTPUT @Ps;"CAL:STATE ON," ! Turn on cal mode, "0" passcode 700 ! 710 GOSUB Ps_error ! Error if passcode is not "0"! 720 IF Err THEN 730 OUTPUT @Ps;"*IDN?" ! Get data from model # location 740 ENTER @Ps;Idn$ 750 Model=VAL(Idn$[POS(Idn$,",")+2]) 760 ELSE 770 GOTO Start 780 END IF 790 ! 800 OUTPUT @Ps;"CAL:STATE ON,";Model ! Turn on cal mode, passcode = 810 ! data at model number location 820 ! 830 GOSUB Ps_error ! Error if passcode is not same as 840 ! data at model # location 850 IF Err THEN 860 OUTPUT @Ps;"CAL:STATE ON,";Model$[1,4] ! Turn on cal mode, passcode = 870 ! model # 880 GOSUB Ps_error 890 IF Err THEN 900 PRINT "Change pass code to the power supply model # or zero then restart the program." 910 STOP 920 ELSE 930 GOTO Start 940 END IF 950 END IF 960 ! 970 Start: ! 980 ! 990 CLEAR SCREEN 1000 PRINT "Initializing EEPROM"

Figure 3-17. Initialization and Factory Preset Replacement Program Listing (Sheet 2 of 3)

Service Addendum 21

Initialization and Factory Preset Replacement Program Listing – (sheet 3)

1010 ! 1020 FOR I=1 TO 49 1030 OUTPUT @Ps;"DIAG:EEPR ";Addr(I);",";Length(I);",";Init_data(I) 1040 NEXT I 1050 ! 1060 CLEAR SCREEN 1070 OUTPUT @Ps;"CAL:STATE OFF" ! Turn off cal mode 1080 ! 1090 GOSUB Ps_error ! Check for errors 1100 IF Err THEN 1110 PRINT "An error occurred during the EEPROM read/write, Check for" 1120 PRINT "programming errors. Initialization data may be incorrect." 1130 STOP 1140 END IF 1150 ! 1160 PRINT "Operation complete. Program stopped." 1170 STOP 1180 ! 1190 Ps_error: ! Error handling subroutine 1200 OUTPUT @Ps;"SYST:ERR?" ! Check for errors 1210 ENTER @Ps;Err 1220 RETURN 1230 ! 1240 END

Figure 3-17. Initialization and Factory Preset Replacement Program Listing (Sheet 3 of 3)

Service Addendum22

Cable and Connector Locations

A2 GPIB

Board

A6 J900

A6 Adapter PCA

J722

A5 DSP

Board

J721

A7 Phone PCA

A1 J900

A1 Main

Board

A4A3

A4A1

Left

Tunnel

Board

A4A2

Right

Tunnel

Board

A4A4

A3 Front Panel Board

Figure 3-18. Cable and Connector Locations for E4350B/E4351B

Service Addendum 23

DSP Board

To remove the A5 DSP Board, proceed as follows:

• Remove the top cover of the power supply as described under, "Top Cover Removal and Replacement."

• Remove the six screws that attach the cover to the DSP board (use a T10 TORX drive).

• Disconnect both cables going to the GPIB board.

Note Be sure to mark any or all cables prior to removal so that no mistake is made later when reinstalling

these cables.

• Disconnect the ribbon cable located at the end of the DSP board.

• Remove the two screws that attach the DSP board to the left side of the chassis

(Use a T10 TORX drive).

• Lift the DSP board together with its mounting bracket out of the chassis.

• Disconnect the cable going to the front panel board.

• Turn the DSP board over and remove the screws that attach the DSP board

to the mounting bracket.

Service Addendum24

Chapter 4 Differences

Digital Signal Processor (DSP) Board

The DSP board replaces the Secondary Interface section of the A1 Main PC board. It replaces the Secondary Microprocessor (U504), the CV and CC programming DACs, Readback D/A, DAC Reference, Readback Comparators, and the Fan and Overvoltage PWMs. It replaces everything found in Figure 6-5, sheet 3 plus the OV filter/buffer (U603) found on sheet 2.

The DSP board contains the new Secondary Microprocessor circuits, the CV, CC, OV, OC and Fan DAC’s, The readback circuits and the secondary ROM and RAM. When operating in the Fixed mode, the instrument acts like a normal power supply with typical crossover characteristics between CV and CC operation. When in SAS mode the customer specified I/E operating curve is entered into the secondary RAM where it is used to modify the supply’s crossover characteristics.

Troubleshooting is to be performed in the Fixed (turn-on default) mode only. See Figure 6-10 for the A5J721/A5J722 connector DAC and Bias voltage pin-outs.

Note The DSP board is available as a replacement assembly only. It is not intended to be repaired to the

component level.

The following figure is a simplified diagram that shows the circuits located on the DSP board (also referred to as the Secondary Interface) in relation to the Output Power and Control circuits previously discussed in chapter 4.

Service Addendum 25

Simplified Diagram of DSP Circuits

ross + G

25K

406

407

408 R

R490

10K

ontrol C

V C

125K

401B U

SAS

408B U

p m

ontrol A C

0 to -5V

703 R

0.02

urrent Lim C

491 R

411 D

408A U

404

Fixed

10K

S SA

r O

ate

488 R

409A U

- S

- Out

P.O. DSP Board

CV_ Prog

DAC

Monitor

Output Voltage

Fixed

4.99K

+5V

Amp

Down

Programming

DAC

IMon

CC_ Prog

DAC

U773

Ref

+5V

Data

U752

U750

A/D

U753

A/D

U751

VMon

S A

412

200

411 R

4.99K

401A U

434

900

to -5V

433

410

464

426 C

.047uF

432

20K

440 R

463 R

4.64K

urrent

onitor

M utput C O

ontrol C

C C

+ 15V

497 R

31.6K

503 R

900

435

20K

605A U

465

10K

403A U

4 D

409B U

14.7K

I Mon

Gate

CC Or

503 R

4.12K

202 U

201

b ssem

A ink

t S ea . H .O

Q201

Series Regulator

ail + R

202 Q

in V

ow D

Program

Figure 4-9. Simplified Power/Control/DSP Circuits

Service Addendum26

Q206

Q205

PLD

U736

U710

Sch4350.Pre

- Rail

Chapter 5 Differences

Table 5-6. Parts List for E4350B/E4351B Chassis

Reference Designator Model Part Number Description

A1 E4350B E4350-61024 Main PC Board A1 E4351B E4351-61021 Main PC Board A2 5063-4851 GPIB Board A3 5063-2360 Keypad/Front Panel PC Board A4A2 & A4A4 5063-4816 Right Tunnel PCA A4A1 5063-4818 Left Top Tunnel PCA A4A3 5063-4820 Left Bottom Tunnel PCA A5 5063-4811 DSP Board A6 5063-4852 Access Panel PCA A7 5063-4813 Phone PCA W1A 06652-80006 Cable-Assembly, AC #1 W1B 06652-80007 Cable-Assembly, AC #2 W2 06654-80001 Cable-Assembly, Xfmr W3 06654-80003 Cable-Assembly, Rail W7 06652-80009 Cable Assembly, AC Bias W8 06652-80008 Cable, GPIB Bias W9 06652-80011 Cable-Phone, A2 to L Tunnel W10 5080-2168 Cable-Phone, A2 to A3 W11, 15 06652-80010 Cable-Phone, A1 to L Tunnel W13, 17 06652-80011 Cable-Phone, A1 to R Tunnel W12, 16 06652-80001 Cable-Assembly, A1 to L Tunnel W14, 18 06652-80002 Cable-Assembly, A1 to R Tunnel W19 5080-2261 Cable-Assembly, LCD W20 5080-2419 Ribbon Cable, A1 to A6

Chassis –Mechanical Front Panel Logo E4350-80003 Nameplate E4350B Front Panel Logo E4351-80002 Nameplate E4351B Ref J690 0360-2191 Cover-Term Block Ref G1, G2 0370-1091 Knob-Base Round Ref Rmt/Lcl Switch 0370-2862 Pushbutton Ref GPIB Connector 0380-644 Threaded Stud Ref Front Frame 0515-0374 Screw-M3x0.5 0515-0375 Screw-Machine Ref Cover PCB, A5 Board 0515-0380 Screw-M4x0.7 0515-0382 Screw-Machine Ref Xfmr Bracket 0515-0413 Screw-M4x0.7 Ref Term Block Cover 0515-1085 Screw-Machine Ref Top Cover 0515-1132 Screw-M5x0.8 0515-1455 Screw-Thd Rlg Ref A5 Cover, A6 Board 0515-0430 Screw-Torx #10 Ref Fan Top Shroud 0535-0031 Nut-Hex W/Lkwr Ref Shroud To Base, AC Gnd 0535-0082 Nut-Hex Ref Display 0590-0534 Nut, Self Thd

06652-00004 Cover, Top Ref Heatsink 06652-00008 Heatsink Shroud Ref A4 Top & Bottom 06652-20001 Heatsink Ref T1 06652-60005 Jumper Assembly

Service Addendum 27

Table 5-6. Parts List for E4350A Chassis-Mechanical (continued)

Reference Designator Part Number Description

Ref Display 1000-0842 Window Ref A2TB101 1252-1488 Terminal Block, 4-Pos Ref A1J640 1252-3698 Connector Ref Ac Bias, Tunnel Cables 1400-0493 Cable Tie Ref Front Bracket 1400-0528 Mount-Cable Tie Ref Ac Pwr, Tunnel 1400-1281 Clip-Cable Ref Rear Panel Ground 1510-0044 Binding Post-Single Ref GPIB Board 1531-0309 Clevis Ref F450 2110-0927 Fuseholder-W/Cap

2190-0016 Washer-Lk Intl T

2190-0034 Washer-Lk Hlcl

Ref AC Ground 2190-0646 Washer-Lock

2950-0043 Nut-Hex-Dbl-Cham

Ref GPIB Connector 3050-0849 Washer-Fl Mtlc

5001-0539 Trim-Sides 5001-6734 Front Panel 5001-6740 Bracket-GPIB 5001-6748 Front Panel 5001-6771 Rear Panel 5001-9819 Chassis 5040-1665 Keypad 5040-1666 Heat Sink-Rail 5040-1667 Heat Sink-Bumper 5040-1697 Block-Top Cover 5040-1703 Front Frame 5041-8801 Foot 5041-8819 Cap-Strap Handle, Front 5041-8820 Cap-Strap Handle, Rear 5062-3704 Strap Handle

Ref Serial Link Cable 5080-2148 Cable, Chain-2m.

5959-3376 Guide, Service 5960-5597 Guide, Programming 5961-2579 Guide, Operating

5962-8206 SAS Operating Guide Ref A5 DSP Board E4350-00001 Bracket-Mounting Ref A5 DSP Board E4350-00002 Cover Front Panel Logo E4350-80003 Nameplate E4350B Front Panel Logo E4351-80002 Nameplate E4351B

Service Addendum28

Table 5-7. Parts List for Main PC Board Assembly (A1)

Reference Designator Model Part Number Description

A1 E4350B E4350-61024 Main Board – Electrical A1 E4351B E4351-61021 Main Board – Electrical C401 E4350B 0160-4835 Capacitor .1uF 10% 50V C401 E4351B 0160-4834 Capacitor.047UF 10% C402 E4350B 0160-4835 Capacitor .1uF 10% 50V C402 E4351B 0160-4834 Capacitor.047UF 10% C403 E4350B 0160-4807 Capacitor 33pF 5% 100V C404 E4350B 0160-4807 Capacitor 33pF 5% 100V C405 0160-5422 Capacitor.047 uF 20% C406 0160-4812 Capacitor 220 pF 5% C407 0160-5422 Capacitor .047 uF 20% C408 0160-5422 Capacitor .047 uF 20% C409 0160-4800 Capacitor 120pF 5% C410 0160-4800 Capacitor 120pF 5% C411 0160-5422 Capacitor .047 uF 20% C412 0160-4800 Capacitor 120pF 5% C413 0160-4800 Capacitor 120pF 5% C414 0160-6616 Capacitor 6800pF 100V C415 0160-5909 Capacitor 0.047uF 50 V C416 0160-5422 Capacitor .047 uF 20% C417 0160-4812 Capacitor 220pF 5% C418 0160-4831 Capacitor 4700pF 10% C419 0160-4831 Capacitor 4700pF 10% C420 0160-4812 Capacitor 220pF 5% C421 0160-5098 Capacitor .22uF 10% C422 0180-4129 Capacitor 1uF 35V C423 E4350B 0160-5422 Capacitor .047 uF 20% C424 0160-5422 Capacitor .047 uF 20% C425 0160-5422 Capacitor .047 uF 20% C426 0160-5909 Capacitor 0.047uF 50 V C427 0160-5909 Capacitor 0.047uF 50 V C428 E4350B 0160-4812 Capacitor 220pF 5% C428 E4351B 0160-4808 Capacitor470PF 100V C429 0160-5422 Capacitor.047 uF 20% C430 0160-4833 Capacitor .022uF 10% C432 0160-4831 Capacitor 4700pF 10% C434 0160-5644 Capacitor .033 uF 10% C435 E4350B 0160-5644 Capacitor .033 uF 10% C436 0160-5469 Capacitor 1uF 10% 50V C437 0160-6616 Capacitor 6800pF 100V C439 0160-4831 Capacitor 4700pF 10% C440 E4350B 0160-4833 Capacitor .022uF 10% C440 E4351B 0160-4832 Capacitor.01UF 10% C441 0160-5422 Capacitor .047 uF 20% C442 0160-5422 Capacitor .047 uF 20% C443 E4350B 0160-5422 Capacitor .047 uF 20% C445 0160-4807 Capacitor 33pF 5% 100V C446 0160-4801 Capacitor 100pF 5% C447 0160-4805 Capacitor 47pF 5% 100V

Service Addendum 29

Table 5-7. Parts List for Main PC Board Assembly A1 (Continued)

Reference Designator Model Part Number Description

C448 0160-5422 Capacitor .047 uF 20% C449 0160-4791 Capacitor 10pF 5% 100V C450 0160-5422 Capacitor .047 uF 20% C451 E4351B 0160-4832 Capacitor.01UF 10% C452 0160-4355 Capacitor .01uF 10% C453 0160-4846 Capacitor 1500pF 100V C454 0160-5422 Capacitor .047 uF 20% C455 0180-4129 Capacitor 1uF 35V C456 0160-4805 Capacitor 47pF 5% 100V C457 0160-4831 Capacitor 4700pF 10% C458 0160-4787 Capacitor 22pF 5% 100V C459 0160-4832 Capacitor .01uF 10% C541 E4350B 0160-4832 Capacitor .01uF 10% C601 E4350B 0160-6806 Capacitor .1uF 400V C601 E4351B 0160-4323 Capacitor .047uF 250V C603 0160-4795 Capacitor 4.7pF C604 0160-5422 Capacitor .047 uF 20% C605 0160-5422 Capacitor .047 uF 20% C606 0160-4800 Capacitor 120pF 5% C607 0160-5422 Capacitor .047 uF 20% C608 0160-4801 Capacitor 100pF 5% C609 0180-0197 Capacitor 2.2uF 20V C610 0160-4835 Capacitor .1uF 10% 50V C611 0160-4800 Capacitor 120pF 5% C700 0160-4281 Capacitor 2200pF 20% C701 0160-4281 Capacitor 2200pF 20% C702 0160-7606 Capacitor 1uF 275V C703 0160-4845 Capacitor 6800pF 20% C704 0160-4355 Capacitor .01uF 10% C705 0180-4129 Capacitor 1uF 35V C706 0180-4129 Capacitor 1uF 35V C707 0160-4830 Capacitor 2200pF 10% C709 E4350B 0160-6804 Capacitor .047uF 250V C709 E4351B 0160-6896 Capacitor0.015uF 400V C710 0160-6896 Capacitor 0.015uF 400V C711 0160-4834 Capacitor .047uF 10% C712 0180-4132 Capacitor 6.8uF 35V C713 0180-3458 Capacitor 4700uF 50V C714 0180-3458 Capacitor 4700uF 50V C715 0180-3458 Capacitor 4700uF 50V C715 E4351B 0160-5422 Capacitor.047 UF 20% C716 0160-4904 Capacitor 6800pF 5% C718 0160-5469 Capacitor 1uF 10% 50V C719 E4350B 0180-4263 Capacitor 4000uF 125V C719 E4351B 0180-4311 Capacitor1200UF 250V C720 E4350B 0180-4263 Capacitor 4000uF 125V C720 E4351B 0180-4311 Capacitor1200UF 250V C721 E4350B 0180-3497 Capacitor 6800uF 16V

Service Addendum30

Table 5-7. Parts List for Main PC Board Assembly A1(Continued)

Reference Designator Model Part Number Description

C722 E4351B 0180-4311 Capacitor1200UF 250V C722 E4350B 0180-4263 Capacitor 4000uF 125V C723 0160-0168 Capacitor .1uF 10% C724 0160-5422 Capacitor .047 uF 20% C725 E4350B 0160-5422 Capacitor .047 uF 20% CR700 5060-3376 SCR/Diode Assembly D401 1901-0033 Diode D402 1901-0033 Diode D403 1901-0033 Diode D404 1901-0033 Diode D405 1901-0033 Diode D406 1901-1128 Diode D407 1901-1128 Diode D408 1901-0033 Diode D409 1901-0033 Diode D410 1901-1098 Diode D411 1901-1098 Diode D413 1901-1098 Diode D415 1901-0518 Diode D416 1901-0050 Diode D417 1901-0050 Diode D418 1901-0033 Diode D419 1901-1098 Diode D420 1901-1098 Diode D421 1901-1098 Diode D422 1901-0050 Diode D423 1901-0050 Diode D424 1901-1098 Diode D425 1901-1098 Diode D426 1901-0050 Diode D427 1901-0050 Diode D428 1901-0731 Diode D429 1901-0731 Diode D430 1901-0050 Diode D431 1901-0050 Diode D601 1901-0050 Diode D602 1901-0050 Diode D603 1901-0050 Diode D604 1901-0050 Diode D605 1901-0050 Diode D606 1901-0731 Diode D607 1901-0050 Diode D608 1901-0050 Diode D609 1901-1214 Diode D700 1901-1098 Diode D701 1901-1098 Diode D702 1901-0719 Diode D703 1901-0719 Diode D704 1901-0719 Diode D705 1901-0719 Diode

Service Addendum 31

Table 5-7. Parts List for Main PC Board Assembly A1 (Continued)

Reference Designator Model Part Number Description

D706 1901-1098 Diode D707 1901-0992 Diode D709 1906-0383 Full Wave Rectifier D710 1901-1087 Diode D711 1901-1087 Diode D712 1901-0050 Diode F700 2110-0685 Fuse, Subminiature, 7A F701 2110-0685 Fuse, Subminiature, 7A F703 2110-0688 Fuse, 3A 125V F704 2110-0697 Fuse, Subminiature, 15A F705 2110-0697 Fuse, Subminiature, 15A J405 1251-4781 Connector J411 1251-4781 Connector J450 1251-7616 Connector J451 1252-3771 AC Line Module J600 1251-4246 Connector, TP J601 1251-4245 Connector, 2 pin J640 1252-3693 Connector J670 1251-8184 Modular Phone Rcpt J671 1251-8184 Modular Phone Rcpt J672 1251-8184 Modular Phone Rcpt J673 1251-8184 Modular Phone Rcpt J690 06652-00005 Bus Bar J691 06652-00005 Bus Bar J900 1251-8601 Connector, TP L701 5080-2321 Output Choke Q206 5060-3250 Transistor/Heatsink Assy Q401 1855-0727 MOSFET Q402 1853-0281 Transistor Q403 1854-0872 Transistor Q600 1853-0336 Transistor Q601 1853-0336 Transistor Q602 1853-0336 Transistor Q603 1853-0336 Transistor Q604 1854-0575 Transistor Q605 1855-0727 MOSFET Q700 5060-3322 Transistor/Heatsink Assy Q701 1854-0477 Transistor R401 E4350B 0698-3153 Resistor 3.83K 1% R401 E4351B 0757-0440 Resistor 7.5K 1% R402 E4350B 0698-6320 Resistor 5K .1% .125W R402 E4351B 0698-6360 Resistor 10K .1% R403 E4350B 0698-6320 Resistor 5K .1% .125W R403 E4351B 0698-6360 Resistor 10K .1% R404 0698-5454 Resistor 9K .1% .125W R405 E4350B 0757-0288 Resistor 9.09K 1% R406 E4350B 0699-3446 Resistor 125K .05% R406 E4351B 0699-3104 Resistor 250K .125W R407 0698-5454 Resistor 9K .1% .125W

Service Addendum32

Table 5-7. Parts List for Main PC Board Assembly A1 (Continued)

Reference Designator Model Part Number Description

R408 E4350B 0699-3446 Resistor 125K .05% R408 E4351B 0699-3104 Resistor 250K .125W R409 E4350B 0757-0288 Resistor 9.09K 1% R410 0698-0082 Resistor 464 1% .125W R411 0698-3279 Resistor 4.99K 1% R412 0683-2015 Resistor 200 5% .25W R413 E4350B 0698-3153 Resistor 3.83K 1% R413 E4351B 0757-0440 Resistor 7.5K 1% R414 8159-0005 Resistor-Zero Ohms R415 0698-6360 Resistor 10K .1% R416 0698-6360 Resistor 10K .1% R417 8159-0005 Resistor-Zero Ohms R418 0698-6630 Resistor 20K .1% R419 0698-6360 Resistor 10K .1% R420 0698-6630 Resistor 20K .1% R421 0698-6630 Resistor 20K .1% R422 0698-6360 Resistor 10K .1% R423 0698-6630 Resistor 20K .1% R424 8159-0005 Resistor-Zero Ohms R425 0699-0118 Resistor 20K .1% .1W R426 0698-6362 Resistor 1K .1% .125W R427 0698-6362 Resistor 1K .1% .125W R428 0699-0118 Resistor 20K .1% .1W R429 8159-0005 Resistor-Zero Ohms R430 8159-0005 Resistor-Zero Ohms R431 8159-0005 Resistor-Zero Ohms R432 0699-0118 Resistor 20K .1% .1W R433 0698-6344 Resistor 900 .1% R434 0698-6344 Resistor 900 .1% R435 0699-0118 Resistor 20K .1% .1W R436 8159-0005 Resistor-Zero Ohms R437 0699-0533 Resistor 4.64K .1% R438 0698-3136 Resistor 17.8K 1% R439 0757-0288 Resistor 9.09K 1% R440 0699-0533 Resistor 4.64K .1% R441 E4350B 0699-0088 Resistor 1.2M 1% R441 E4351B 0698-8826 Resistor 825K 1% R442 0698-3155 Resistor 4.64K 1% R443 0757-0446 Resistor 15K 1% .125W R444 0757-0439 Resistor 6.81K 1% R445 E4350B 0698-8827 Resistor 1M 1% .125W R445 E4351B 0699-0070 Resistor3.16M 1% R446 0698-3260 Resistor 464K 1% R447 E4350B 0757-0465 Resistor 100K 1% R447 E4351B 0757-0471 Resistor 182K 1% R448 0698-0084 Resistor 2.15K 1% R449 0698-3155 Resistor 4.64K 1% R450 0757-0446 Resistor 15K 1% .125W R451 0698-3260 Resistor 464K 1% R452 0698-6320 Resistor 5K .1% .125W

Service Addendum 33

Table 5-7. Parts List for Main PC Board Assembly A1 (Continued)

Reference Designator Model Part Number Description

R453 0699-0533 Resistor 4.64K .1% R455 0698-0084 Resistor 2.15K 1% R456 0757-0401 Resistor 100 1% .125W R458 0698-3428 Resistor 14.7 1% R460 0757-0459 Resistor 56.2K 1% R461 0698-3162 Resistor 46.4K 1% R462 0698-3162 Resistor 46.4K 1% R463 0757-0283 Resistor 2K 1% .125W R464 0698-4435 Resistor 2.49K 1% R465 0698-6360 Resistor 10K .1% R466 0757-0430 Resistor 2.21K 1% R467 E4350B 0757-0270 Resistor 249K 1% R467 E4351B 0757-0468 Resistor 130K 1% R468 0698-5454 Resistor 9K .1% .125W R469 0698-3700 Resistor 715 1% .125W R471 0757-0401 Resistor 100 1% .125W R473 0757-0427 Resistor 1.5K 1% R474 0698-3156 Resistor 14.7K 1% R475 E4350B 0757-0418 Resistor 619 1% .125W R475 E4351B 0757-0283 Resistor 221 R476 0698-3156 Resistor 14.7K 1% R477 8159-0005 Resistor-Zero Ohms R478 0698-3279 Resistor 4.99K 1% R479 0698-4435 Resistor 2.49K 1% R480 E4350B 0757-0418 Resistor 619 1% .125W R480 E4351B 0757-0282 Resistor 221 1% .125W R481 0698-3156 Resistor 14.7K 1% R482 0698-3557 Resistor 806 1% .125W R483 0757-0279 Resistor 3.16K 1% R484 0757-0199 Resistor 21.5K 1% R485 0757-0199 Resistor 21.5K 1% R488 0698-3279 Resistor 4.99K 1% R489 E4350B 0757-0451 Resistor 24.3K 1% R489 E4351B 0757-0457 Resistor 47.5K 1% R490 0698-6360 Resistor 10K .1% R491 0698-6360 Resistor 10K .1% R492 0757-0433 Resistor 3.32K 1% R493 E4350B 0699-1254 Resistor 536K 1% R493 E4351B 0698-8827 Resistor 221K 1% R494 E4350B 0757-0412 Resistor 365 1% .125W R494 E4351B 0757-0421 Resistor 1M 1% .125W R495 0757-0434 Resistor 3.65K 1% R496 0757-0469 Resistor 150K 1% R497 0698-3160 Resistor 31.6K 1% R498 0698-3162 Resistor 46.4K 1% R499 0757-0463 Resistor 82.5K 1% R500 0757-0407 Resistor 200 1% .125W R501 0757-1093 Resistor 3K 1% .125W R502 E4350B 0698-3493 Resistor 4.12K 1% R502 E4351B 0757-0427 Resistor 1.5K 1% R503 E4350B 0698-3156 Resistor 14.7K 1% R503 E4351B 0698-4121 Resistor 11.3K 1%

Service Addendum34

Table 5-7. Parts List for Main PC Board Assembly A1 (Continued)

Reference Designator Model Part Number Description

R504 0757-0442 Resistor 10K 1% .125W R505 0757-0429 Resistor 1.82K 1% R506 0698-3160 Resistor 31.6K 1% R507 0757-0442 Resistor 10K 1% .125W R508 0757-0444 Resistor 12.1K 1% R509 0757-0280 Resistor 1K 1% .125W R510 0698-3279 Resistor 4.99K 1% R511 0757-0430 Resistor 2.21K 1% R512 0757-0401 Resistor 100 1% .125W R513 0757-0401 Resistor 100 1% .125W R514 0757-0284 Resistor 150 1% .125W R515 0757-0284 Resistor 150 1% .125W R516 0698-0084 Resistor 2.15K 1% R517 0699-1797 Resistor 10M 5% .25W R520 0757-0419 Resistor 681 1% .125W R521 0757-0470 Resistor 162K 1% R522 0757-0442 Resistor 10K 1% .125W R523 0757-0472 Resistor 200K 1% R524 0698-8826 Resistor 825K 1% R525 0698-3156 Resistor 14.7K 1% R526 0757-0427 Resistor 1.5K 1% R601 0757-0465 Resistor 100K 1% R602 0698-4037 Resistor 46.4 1% R603 0757-0407 Resistor 200 1% .125W R604 0698-4037 Resistor 46.4 1% R605 0757-0407 Resistor 200 1% .125W R606 0698-4037 Resistor 46.4 1% R607 0757-0407 Resistor 200 1% .125W R608 E4350B 8159-0005 Resistor-Zero Ohms R608 E4351B 0757-0463 Resistor 82.5K 1% R609 0757-0463 Resistor 82.5K 1% R610 E4350B 0698-0082 Resistor 464 1% .125W R610 E4351B 0757-0280 Resistor 1K 1% .125W R611 0698-6358 Resistor 100K .1% R612 0757-0463 Resistor 82.5K 1% R613 E4350B 8159-0005 Resistor-Zero Ohms R613 E4351B 0757-0463 Resistor 82.5K 1% R614 0698-6358 Resistor 100K .1% R615 E4350B 8159-0005 Resistor-Zero Ohms R615 E4351B 0698-6629 Resistor 60K .1% R616 E4350B 0698-6977 Resistor 30K .1% .125 R616 E4351B 0698-6358 Resistor100K .1% R617 0698-5454 Resistor 9K .1% .125W R618 E4350B 0698-8826 Resistor 825K 1% R618 E4351B 0699-1972 Resistor 1.74M 1% R619 E4350B 0698-6977 Resistor 30K .1% .125 R619 E4351B 0698-6358 Resistor 100K .1% R620 0757-0442 Resistor 10K 1% .125W R621 0757-0415 Resistor 475 1% .125W R622 0757-0281 Resistor 2.74K 1% R623 0698-5454 Resistor 9K .1% .125W

Service Addendum 35

Table 5-7. Parts List for Main PC Board Assembly A1 (Continued)

Reference Designator Model Part Number Description

R624 8159-0005 Resistor-Zero Ohms R625 E4350B 0698-8826 Resistor 825K 1% R625 E4351B 0699-1972 Resistor 1.74M 1% R626 8159-0005 Resistor-Zero Ohms R627 8159-0005 Resistor-Zero Ohms R628 E4350B 8159-0005 Resistor-Zero Ohms R628 E4351B 0698-6629 Resistor 60K .1% R630 0757-0395 Resistor 56.2 1% R631 0757-0199 Resistor 21.5K 1% R632 0757-0401 Resistor 100 1% .125W R633 0757-0469 Resistor 150K 1% R634 0757-0446 Resistor 15K 1% .125W R635 0757-0430 Resistor 2.21K 1% R636 0757-0415 Resistor 475 1% .125W R637 0757-0415 Resistor 475 1% .125W R638 0757-0407 Resistor 200 1% .125W R639 0698-3155 Resistor 4.64K 1% R640 0698-3155 Resistor 4.64K 1% R641 0698-3153 Resistor 3.83K 1% R642 0698-3155 Resistor 4.64K 1% R643 0698-8695 Resistor 36K .1% R644 0698-0084 Resistor 2.15K 1% R645 0757-0442 Resistor 10K 1% .125W R646 0757-0280 Resistor 1K 1% .125W R647 0683-0475 Resistor 4.7 5% .25W R648 0683-0475 Resistor 4.7 5% .25W R649 0757-0280 Resistor 1K 1% .125W R650 0757-0441 Resistor 8.25K 1% R651 0757-0465 Resistor 100K 1% R652 0698-3160 Resistor 31.6K 1% R653 0757-0199 Resistor 21.5K 1% R654 0698-8816 Resistor 2.15 1% R655 0757-0199 Resistor 21.5K 1% R656 0757-0199 Resistor 21.5K 1% R657 0698-3162 Resistor 46.4K 1% R658 0757-0199 Resistor 21.5K 1% R659 8159-0005 Resistor-Zero Ohms R661 0757-0401 Resistor 100 1% .125W R662 0757-0280 Resistor 1K 1% .125W R700 0683-1055 Resistor 1M 5% .25W R701 0699-1797 Resistor 10M 5% .25W R702 0683-0335 Resistor 3.3 5% .25W R703 E4350B 0811-3764 Resistor .025 7W 2% R703 E4351B 0811-3770 Resistor .05 OHM 1% R704 8159-0005 Resistor-Zero Ohms R705 0698-6359 Resistor 80K O.1% R706 0698-6979 Resistor 111.1K .1% R707 0699-1212 Resistor 19K .1% R708 8159-0005 Resistor-Zero Ohms R709 0699-4707 Resistor .25 Ohm R710 0811-2201 Resistor 270 5% 2W PW R711 0811-2201 Resistor 270 5% 2W PW

Service Addendum36

Table 5-7. Parts List for Main PC Board Assembly A1 (Continued)

Reference Designator Model Part Number Description

R712 0686-2225 Resistor 2.2K 5% .5W R713 E4350B 0811-3932 Resistor 13 10W R714 E4351B 0811-3932 Resistor-13 10W R716 E4351B 0811-3932 Resistor-13 10W R717 8159-0005 Resistor-Zero Ohms R718 0811-2568 Resistor 1 1% 3W PWI R719 0757-0280 Resistor 1K 1% .125W R720 0757-0279 Resistor 3.16K 1% R721 E4350B 0811-1873 Resistor 3K 5% 10W PW R721 E4351B 0811-1914 Resistor 5K 5% 10W PW R722 E4350B 0811-1873 Resistor 3K 5% 10W PW R722 E4351B 0811-1914 Resistor 5K 5% 10W PW R723 E4350B 0698-3628 Resistor 220 5% 2W MO R723 E4351B 0698-3627 Resistor 200 5% 2W MO R724 0698-0082 Resistor 464 1% .125W R725 E4350B 0811-1586 Resistor 1K 5% 10W PW R725 E4351B 0811-1873 Resistor 3K 5% 10W PW R726 8159-0005 Resistor-Zero Ohms R727 0757-0280 Resistor 1K 1% .125W R728 0699-4707 Resistor .25 Ohm R729 0757-0419 Resistor 681 1% .125W REF D709 E4350B 0515-0383 Machine Screw REF D709 E4350B 1205-0862 Heat Sink REF D7092 E4351B 0515-0383 Machine Screw REF D7094 E4351B 1205-0862 Heat Sink REF J451 E4350B 3050-0891 Flat Washer REF J451 E4350B 0535-0031 Hex Nut w/Lock Washer REF J690, J691 E4350B 2190-0586 Helical Lock Washer REF J690, J691 E4350B 0515-0909 Machine Screw REF J451 E4351B 570-0647 STUD-STD-PRS-IN REF J4512 E4351B 0535-0031 NUT-HEX W/LKWR REF J4513 E4351B 3050-0891 WSHR-FL MTLC REF J6902,6912 E4351B 2190-0586 WSHR-LK HLCL REF J690,J691 E4351B 0515-0909 SCR-MACH MAX .07 S610 3101-2894 Push Button Switch, DPDT U401 1826-1533 Integrated Circuit U402 1826-1533 Integrated Circuit U403 1826-2252 Integrated Circuit U404 1826-1533 Integrated Circuit U405 1826-0412 Integrated Circuit U406 1858-0077 Transistor Array U407 1826-0175 Integrated Circuit U408 1826-1533 Integrated Circuit U409 1826-1533 Integrated Circuit U410 1990-1502 Opto Isolator U411 1820-3081 Integrated Circuit U600 1826-1895 Integrated Circuit U601 1858-0077 Transistor Array U602 1858-0047 Transistor Array U603 1826-0412 Integrated Circuit

Service Addendum 37

Table 5-7. Parts List for Main PC Board Assembly A1 (Continued)

Reference Designator Model Part Number Description

U604 1858-0077 Transistor Array U605 1858-0076 Transistor Array U700 5060-3321 IC/Heat Sink Assy U701 5063-2351 IC/Heat Sink Assy U702 1826-1533 Integrated Circuit U703 5063-2328 IC/Heat Sink Assy VR400 1902-0556 Zener Diode 20V 5% VR600 1902-0947 Zener Diode 3.6V 5% VR601 1902-0947 Zener Diode 3.6V 5% VR602 1902-3104 Zener Diode 5.62V 5% VR603 1902-0958 Zener Diode 10V 5% VR700 1902-0957 Zener Diode 9.1 V 5% VR701 1902-0955 Zener Diode 7.5V 5% XF450 2110-0927 Fuseholder w/Cap

Table 5-9. Parts List for GPIB PC Assembly (A2)

Reference Designator Part Number Description

A2 5063-2356 GPIB Board (unchanged)

Table 5-10. Parts List for Front Panel PC Assembly (A3)

Reference Designator Part Number Description

A3 5063-2360 Front Panel Board (unchanged)

Service Addendum38

Table 5-11. Parts List for Top Left Tunnel Board (A4A1)

Reference Designator Part-Number Description

A4A1 5063-4818 Top Left Tunnel Board C201 0160-4801 Capacitor 100PF 5% C202 0160-4801 Capacitor 100PF 5% C203 0160-4801 Capacitor 100PF 5% C204 0160-4801 Capacitor 100PF 5% C205 0160-4835 Capacitor .1UF 10% 50V C206 0160-4835 Capacitor .1UF 10% 50V C208 0160-6838 Capacitor 2200pf 1KV C211 0160-4812 Capacitor 220PF 5% D201 1901-1098 Diode D203 1901-0050 Diode D204 1901-0050 Diode D205 1901-0050 Diode F201 2110-0297 Fuse, 0.5A, 125V F202 2110-0297 Fuse, 0.5A, 125V F203 2110-0297 Fuse, 0.5A, 125V F204 2110-0297 Fuse, 0.5A, 125V F205 8159-0005 Resistor, Zero Ohms F206 8159-0005 Resistor, Zero Ohms F207 8159-0005 Resistor, Zero Ohms F208 8159-0005 Resistor, Zero Ohms J201 1251-8184 Modular Phone Rcpt J202 1251-4781 Connector Q201 1855-0849 FET Q203 1855-0849 FET Q205 1854-0989 Transistor Q207 1855-0849 FET Q206 5060-3250 Transistor/Heat Sink Assy R201 0811-3989 Resistor 1.5 1% 3W R202 0698-3430 Resistor 21.5 1% R203 0698-3156 Resistor 14.7K 1% R204 0757-0280 Resistor 1K 1% .125W R206 0811-3989 Resistor 1.5 1% 3W R207 0698-3430 Resistor 21.5 1% R208 0698-3156 Resistor 14.7K 1% R209 0757-0280 Resistor 1K 1% .125W R210 0698-3456 Resistor 287K 1% R212 0757-0316 Resistor 42.2 1% R213 0698-3441 Resistor 215 1% .125W R214 0698-0085 Resistor 2.61K 1% R215 0698-4503 Resistor 66.5K 1% R216 0811-3989 Resistor 1.5 1% 3W R217 0698-3430 Resistor 21.5 1% R218 0698-3156 Resistor 14.7K 1% R219 0757-0280 Resistor 1K 1% .125W R220 0757-0468 Resistor 130K 1% R221 0757-0280 Resistor 1K 1% .125W R224 0698-3628 Resistor 220 5% 2W MO R229 8159-0005 Resistor, Zero Ohms R230 8159-0005 Resistor, Zero Ohms R232 8159-0005 Resistor, Zero Ohms R233 8159-0005 Resistor, Zero Ohms 0340-0458 Insulator (Ref Q205) 0515-0064 Screw, Mach M3x0.5x16mm pan head (Ref Q201,Q203,Q205,Q207) 1200-1158 Transistor Socket (Ref Q201,Q203,Q205,Q207) 2190-0584 Washer, helical lock (Ref Q201,Q203,Q205,Q207)

Service Addendum 39

Table 5-12. Parts List for Right Tunnel Boards (A4A2 & A4A4)

Reference Designator Part-Number Description

A4A2/A4 5063-4816 Right Tunnel Board C301 0160-4801 Capacitor 100PF 5% C302 0160-4801 Capacitor 100PF 5% C303 0160-4801 Capacitor 100PF 5% C304 0160-4801 Capacitor 100PF 5% C305 0160-4835 Capacitor .1UF 10% 50V C306 0160-4835 Capacitor .1UF 10% 50V C309 0160-6838 Capacitor 2200pf 1KV D302 1901-0050 Diode D303 1901-0050 Diode D305 1901-0050 Diode F301 2110-0297 Fuse .5A 125V F302 2110-0297 Fuse .5A 125V F303 2110-0297 Fuse .5A 125V F304 8159-0005 Resistor-Zero Ohms F305 8159-0005 Resistor-Zero Ohms F306 8159-0005 Resistor-Zero Ohms F307 8159-0005 Resistor-Zero Ohms J300 1251-4245 Connector, 2 pin J301 1251-8184 Mod Phone Receptacle J302 1251-4781 Connector Q301 1855-0849 FET Q303 1855-0849 FET Q305 1855-0849 FET Q307 1855-0849 FET R301 0811-3989 Resistor 1.5 1% 3W R302 0698-3430 Resistor 21.5 1% R303 0698-3156 Resistor 14.7K 1% R304 0757-0280 Resistor 1K 1% .125W R305 0757-0473 Resistor 221K 1% R306 0811-3989 Resistor 1.5 1% 3W R307 0698-3430 Resistor 21.5 1% R308 0698-3156 Resistor 14.7K 1% R309 0757-0280 Resistor 1K 1% .125W R310 0757-0465 Resistor 100K 1% R311 0811-3989 Resistor 1.5 1% 3W R312 0698-3430 Resistor 21.5 1% R313 0698-3156 Resistor 14.7K 1% R314 0757-0280 Resistor 1K 1% .125W R315 0757-0460 Resistor 61.9K 1% R316 0811-3989 Resistor 1.5 1% 3W R317 0698-3430 Resistor 21.5 1% R318 0698-3156 Resistor 14.7K 1% R319 0757-0280 Resistor 1K 1% .125W R320 0757-0458 Resistor 51.1K 1% R323 0698-3628 Resistor 220 5% 2W MO R329 8159-0005 Resistor-Zero Ohms R330 8159-0005 Resistor-Zero Ohms R331 8159-0005 Resistor-Zero Ohms R332 8159-0005 Resistor-Zero Ohms RT301 06652-60006 Thermistor, Assembly

0515-0064 Screw, Mach M3x0.5x16mm pan head (Ref Q301,Q303,Q305,Q307) 1200-1158 Transistor Socket (Ref Q301,Q303,Q305,Q307) 2190-0584 Washer, helical lock (Ref Q301,Q303,Q305,Q307)

Service Addendum40

Table 5-11. Parts List for Bottom Left Tunnel Board (A4A3)

Reference Designator Part-Number Description

A4A3 5063-4820 Bottom Left Tunnel Board C201 0160-4801 Capacitor 100PF 5% C202 0160-4801 Capacitor 100PF 5% C204 0160-4801 Capacitor 100PF 5% C205 0160-4835 Capacitor .1UF 10% 50V C206 0160-4835 Capacitor .1UF 10% 50V C209 0160-6806 Capacitor .1UF 400V C208 0160-6838 Capacitor 2200pf 1KV Q201 1855-0849 FET Q203 1855-0849 FET Q205 1854-0989 Transistor Q207 1855-0849 FET R203 0698-3156 Resistor 14.7K 1% R208 0698-3156 Resistor 14.7K 1% R218 0698-3156 Resistor 14.7K 1% R202 0698-3430 Resistor 21.5 1% R207 0698-3430 Resistor 21.5 1% R217 0698-3430 Resistor 21.5 1% R210 0698-3456 Resistor 287K 1% R224 0698-3628 Resistor 220 5% 2W MO R204 0757-0280 Resistor 1K 1% .125W R209 0757-0280 Resistor 1K 1% .125W R219 0757-0280 Resistor 1K 1% .125W R220 0757-0468 Resistor 130K 1% R201 0811-3989 Resistor 1.5 1% 3W R206 0811-3989 Resistor 1.5 1% 3W R216 0811-3989 Resistor 1.5 1% 3W J202 1251-4781 Connector J201 1251-8184 Modular Phone Rcpt D203 1901-0050 Diode D204 1901-0050 Diode D205 1901-0050 Diode F201 2110-0297 Fuse .5A 125V F202 2110-0297 Fuse .5A 125V F203 2110-0297 Fuse .5A 125V F205 8159-0005 Resistor, Zero Ohms F206 8159-0005 Resistor, Zero Ohms F207 8159-0005 Resistor, Zero Ohms R229 8159-0005 Resistor, Zero Ohms R230 8159-0005 Resistor, Zero Ohms R231 8159-0005 Resistor, Zero Ohms R232 8159-0005 Resistor, Zero Ohms R233 8159-0005 Resistor, Zero Ohms R234 8159-0005 Resistor, Zero Ohms R235 8159-0005 Resistor, Zero Ohms 0340-0458 Insulator (Ref Q205) 0515-0064 Screw, Mach M3x0.5x16mm pan head (Ref Q201,Q203,Q205,Q207) 1200-1158 Transistor Socket (Ref Q201,Q203,Q205,Q207) 2190-0584 Washer, helical lock (Ref Q201,Q203,Q205,Q207)

Service Addendum 41

Table 5-13. Parts List for DSP Board (A5)

Reference Designator Part Number Description

A5 5063-4811 DSP Board

5080-2559 ROM High 5080-2560 ROM Low

Table 5-14. Parts List for Adapter PC Assembly (A6)

Reference Designator Part Number Description

A6 5063-4852 Access Panel PCA C8 0160-4833 Capacitor, 0.022uF C1 0160-5422 Capacitor 0.047uF C2 0160-5422 Capacitor 0.047uF C4 0160-5422 Capacitor 0.047uF C5 0160-5422 Capacitor 0.047uF C6 0180-0393 Capacitor 39uF, 10V C7 0180-0393 Capacitor 39uF, 10V J501 1251-7330 Modular Phone Rcpt J900 1252-0242 Connector Post P715 1252-2634 Connector Post P721 1252-6419 Connector Post P722 1252-6419 Connector Post Q501 1855-0727 MOSFET Q502 1855-0727 MOSFET R1 0699-0642 Resistor 10K, 0.1%, 0.1W R2 0699-0642 Resistor 10K, 0.1%, 0.1W R3 0698-3700 Resistor 715 Ohm, 1%, 0.125W R4 0699-0642 Resistor 10K, 0.1%, 0.1W R5 0699-0642 Resistor 10K, 0.1%, 0.1W R6 0699-0642 Resistor 10K, 0.1%, 0.1W R7 0699-0642 Resistor 10K, 0.1%, 0.1W R8 0757-0413 Resistor 392 Ohm, 1%, 0.125W R9 0698-3279 Resistor 4.99K, 1% R501 0757-0442 Resistor 10K, 1%, 0.125W R502 0757-0442 Resistor 10K, 1%, 0.125W U1 1826-1533 IC

Mechanical

0380-1262 Standoff, Hex, 12mm 0515-0430 Machine Screw (qty 2)

Table 5-15. Parts List for Phone Adapter PC Assembly (A7)

Reference Designator Part Number Description

A7 5063-4813 Phone PCA

0757-0442 Resistor, 10K, 1%, 0.125W 1251-7330 Modular Phone Rcpt 1252-2634 Connector, Post 1855-0727 MOSFET

Service Addendum42

Chapter 6 Differences

Test Points

Table 6-3. Test Points

Test Point Signal Measurement and Conditions

A1 Main Board (Sheets 1-4); A5 DSP Board

Connect meter or scope common to Test Point (TP) 9 when taking measurements at Test Points 10 through 46

TP9 R703-3 Secondary common (sheet 1) R703-3 (RmINB) TP10 F703 +5V Sec Bias (sheet 1) +5V +/- 0.2V TP11 R704 +15 Sec Bias (sheet 1) +15 +/- 0.6V TP12 Q700 (heat sink) TP13 R708 -15V Sec Bias (sheet 1) -15V +/- 1V TP14 U701-2 -25V (sheet 1) -22V to –28V (300mV p-p ripple)

TP15 U702-3 Fan speed control (sheet 1) +3V with no load connected and ambient temperature TP16 D701

anode TP17 U603-5 PCLR* (DSP Board) (sheet 3) Goes low for approximately 40mS at power on, then goes

TP18 U603-7 Shutdown circuit (sheet 3) +8.69V with output on TP19 U602-16 Shut do wn circ uit (sheet 3) +0.7V with output off, +15.2V with output on. TP20 VR602 anode TP21 D606 anode TP24 R421 CC_Prog (sheet 2) -4.2V (approximate) with full-scale current programmed. TP25 R623 CV_Prog (sheet 2) -4.3V (approximate) with full-scale voltage programmed.

+24V (sheet 1) +21V to +27V (1V p-p ripple)

25C.

Fan speed control (sheet 1) +2.95V with no load connected and ambient temperature

25C. high (5V).

+9V Gated (sheet 3) +9V

-15V Gated(sheet 3) -14.2V

Service Addendum 43

Table 6-3. Test Points (continued)

Test Point Signal Measurement and Conditions

The measurements at test points 26 through 39 were taken with full scale voltage and full scale current programmed. The measurements were made first in the CV mode with no load and then in the CC mode with the load set for full-scale output voltage and current. If the CC annunciator is not on, set the current to a slightly lower value until it comes on. TP26 D413 cathode TP27 R703 RmOUTB (sheet 2) 3.3mV in CV mode with no load

TP28 U403-7 Imon (sheet 2) 0.9mV in CV mode with no load TP29 R430 Neg Imon(sheet 2) 13.9mV in CV mode TP31 U407-7 CC* (sheet 2) 5V in CV mode TP32 U408-7 CV control (sheet 2) -0.8V in CV mode TP33 U401-7 Vmon (sheet 2) 4.1V in CV or CC mode (@ full scale voltage output)

TP34 U407-12 CV*(sheet 2) 0V in CV mode TP35 U408-3 CV or CC control (sheet 2) 0.5V in CV mode TP36 D429

anode TP37 D419 cathode TP38 D425 cathode TP39 R444 OV_Prog (sheet 2) 5.17V @ full scale OV programmed TP40 R706 Fan_Prog (sheet 1) 0.5V approximate @ low speed

TP41 R453 OC_Prog (sheet 2) 4.6V (turn-on default) TP42 U405-5 OV circuit (sheet 2) 4.5V with full scale voltage programmed

TP43 U405-7 OV circuit (sheet 2) 5V (no OV condition) TP44 R510 Therm HS(sheet 2) 3.2V with heatsink @23C (voltage decreases as

TP45 D430 anode TP46 D407 cathode

CC control (sheet 2) 1.57V in CV mode

0.15V in CC mode

0.19V in CC mode with 8A load

4.39V in CC mode with 8A load

-3.9V in CC mode with 8A load 0V on CC mode

1.55V in CC mode

5V in CC mode

0.98V in CC mode

FET control (sheet 2) 0.05V in CV mode

0.98V in CC mode Gross current limit circuit (sheet 2) DP Control (sheet 2) 0.22V in CV mode

OC circuit (sheet 2) 5V with no overcurrent condition OC circuit (sheet 2) 0.45V with no overcurrent condition

14.5V in CV or CC mode

1.9V in CC mode

3.2V approximate @ medium speed (4A output)

5V approximate @ high speed (8A output)

0V with zero volts programm ed

temperature increases)

2.3V in OC Protect

Service Addendum44

Table 6-3. Test Points (continued)

Test Point Signal Measurement and Conditions

A4A1/A4A3 LEFT TUNNEL BOARDS (FIGURE 6-6) Leave meter or scope common connected to test point ((9)) when taking measurements at test points 47 through 64. The measurements were taken with full-scale voltage and current programmed. The measurements were made first in the CV mode with no load, and then in the CC mode with the load set for full-scale voltage and current. Test points are listed for the first regulator (closest to fan) and the last regulator stages only. The number of regulator stages that will be on (conducting) depends upon the output current. In the CV mode with no load connected (no output current), only one or two stages will be on conducting current through the down programmer stages. The remaining regulator stages will be off (not conducting). In the CC mode with the load set for full-scale output voltage and current, all regulator stages will be on.

TP47 U201-3 OUTPUT CONTROL

(comparator + input to all stages)

TP48 U201-2 Stage 1 comparator -input 0.05V in CV mode TP49 U201-1 Stage 1 FET driver input 3.75V in CV mode TP51 U202-2 Stage 3 comparator -input 0.05V in CV mode TP52 U202-1 Stage 3 FET driver control -0.36V in CV mode TP54 U202-5 DP CONTROL 0.22V in CV mode TP55 U202-6 DP stage comparator -input 0.22V in CV mode TP56 U202-7 DP stage comparator output -0.66V in CV mode

A4A2/A4A4 RIGHT TUNNEL BOARDS (FIGURE 6-7) The same measurement conditions apply as described for the A4A1/A4A3 Left Tunnel Boards. TP58 U301-3 OUTPUT CONTROL 47mV in CV mode

TP59 U301-2 Stage 1 comparator -input 47mV in CV mode TP60 U301-1 Stage 1 FET driver control 3.3V in CV mode TP62 U302-2 Stage 4 comparator -input 45mV in CV mode TP63 U302-1 Stage 4 FET driver control -0.45V in CV mode

0.05V in CV mode

0.98V in CC mode

4.78V in CC mode

0.98V in CC mode

4.65V in CC mode

1.9V in CC mode

2.47V in CC mode

0.99V in CC mode

0.98V in CC mode

4.75V in CC mode

0.98V in CC mode

4.5V in CC mode

Service Addendum 45

A1 Main Board Schematics (Figure 6-5)

The four schematic sheets for the A1 board included in this addendum replace figures 6-2 and 6-5 in the standard Service Manual for the Agilent Series 665xA DC Power Supplies.

The assembly drawing for the A1 main board included in this addendum replaces Figure 6-5 in the standard Service Manual.

Left Tunnel Circuits (Figure 6-6)

The component locations and schematic drawings for the A4 left tunnel circuits included in this addendum replace figure 6-6 in the standard Service Manual.

Right Tunnel Circuits (Figure 6-7)

The component locations and schematic drawings for the A4 right tunnel circuits included in this addendum replace figure 6-7 in the standard Service Manual.

DSP Board (Figure 6-10)

The simplified component locations diagram for the A5 DSP board shows the location of the troubleshooting test points on the J721 and J722 connectors as well as the location of the two replaceable ROM chips, U734 and U735.

Because troubleshooting for the A5 DSP Board is to the assembly level only, no schematics or parts lists are included for this board.

Adapter Board and Phone Adapter Board (Figures 6-11, 6-12)

The A6 Adapter board connects the A5 DSP board to the A1 main board. The A7 Phone Adapter board connects the A5 DSP board to the A2 GPIB board.

Service Addendum46