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LIST OF TABLES

Table Page

3-1 Test Equipment Required for Verification ………………………………………………………………………………………… 3-2

3-2 Low Range Voltage and Current Values …………………………………………………………………………………………… 3-4

3-3 Performance Test Record for Agilent 6625A and 6628A ...………………………………………………………………………. 3-15

3-4 Performance Test Record for Agilent 6626A and 6629A ………………………………………………………………………… 3-16

4-1 Test Equipment Required for Troubleshooting …………………………………………………………………………………… 4-5

4-2 Fuses …………………………………………………………………………………………………………………………………….4-6

4-3 Tests Performed at Power-On ..……………………………………………………………………………………………………… 4-8

4-4 Power-On Self Test Error Message ………………………………………………………………………………………………….. 4-9

4-5 ERROR Codes and Messages.………………………………………………………………………………………………………. 4-10

4-6

4-8 GPIB Board S.A. Test No. 3 ………………………………………………………………………………………………………… 4-20

4-9 GPIB Board S.A. Test No. 4 ………………………………………………………………………………………………………… 4-21

4-10 GPIB Board S.A. Test No. 5 ………………………………………………………………………………………………………… 4-22

4-11 GPIB Board S.A. Test No. 6 ………………………………………………………………………………………………………… 4-23

4-12 GPIB Board S.A. Test No. 7 ………………………………………………………………………………………………………… 4-24

4-13 GPIB Board S.A. Test No. 8 ………………………………………………………………………………………………………… 4-25

4-14 Keyboard Signal Paths ………………………………………………………………………………………………………………. 4-27

4-15 Microcomputer (U312) Signal Measurements During the Self Exercise Routine …………………………………………… 4-44

4-16 U368 Signal Levels …………………………………………………………………………………………………………………… 4-45

4-17 Signal Processor (U327) Signal Levels …………………………………………………………………………………………….. 4-47

4-18 Typical Power Module Voltage Levels ……………………………………………………………………………………………. 4-49

4-19 Miscellaneous Trouble Symptoms …………………………………………………………………………………………………. 4-50

5-1 Output Board Configurations ……………………………………………………………………………………………………….. 5-1

5-2 Reference Designators ………………………………………………………………………………………………………………… 5-1

5-3 Abbreviations …………………………………………………………………………………………………………………………...5-2

5-4 Federal Manufacturer Codes ………………………………………………………………………………………………………… 5-3

5-5 Chassis Parts …………………………………………………………………………………………………………………………… 5-4

5-6 Output Board Replacement Part List …………………………………………………………………………………………………5-7

5-7 25W/.5A Replacement Parts List ……………………………………………………………………………………………………. 5-9

5-8 50W/2A Replacement Parts List …………………………………………………………………………………………………… 5-18

GPIB Board S.A. Test No. 1 ………………………………………………………………………………………………………… 4-18

4-7 GPIB Board S.A. Test No. 2 ………………………………………………………………………………………………………… 4-19

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Agilent Technologies 66 A Series Service Manual

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