HP 4145A Operating And Service Manual

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Brand: HP

Category: Measuring Instruments , Multimeter

Type: Operating and service manual for HP 4145A

Pages: 269

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Model 4145A Table of Contents
TABLE OF CONTENTS
L’
Section Title Page
3-127. Protection againt Hazard-
ous Voltage Exceeding
+42V . . . ..d........... 3-114
3-129. PLOT/PRINT Operations
Using HP-IB Controller 3-114
3-131. Measurement Ranges and
Resolution . . . . . . . . . . . 3-116
3-133. Resolution and Format for
Displayed Data and Data
Output . . . . . . . . . . . . . . . 3-118
IV PERFORMANCE TEST
4-l.
Introduction . . . . . . . . . . . . .
4-1
4-3. Equipment Required . . . . . . . 4-1
4-5.
Test Record . . . . . . . . . . . . . . 4-l
4-7. Calibration Cycle .* . . . . . . 4-1
4-9. Graphics Display Unit
Intensity and Focus
Check . . . . . . . . . . . . . . . . .
4-2
4-10. Page and Key Function
Check . . . . . . . . . . . . . . . . .
4-4
4-11. SMU Accuracy Test
. . . . . . . . 4-5
4-12. VS Accuracy Test . . . . . . . . . 4-19
4-13. VM Accuracy Test
. . . . . . . . . 4-22
4-14. External CRT X-Y-Z Output
L'
Check . . . .._............ 4-25
4-15.
HP-IB
Interface Test . . . . . 4-27
V
ADJUSTMENT
5-l. Introduction . . . . . . . . . . . . .
5-1
5-3. Safety Requirement . . . . . . . 5-l
5-7.
Equipment.Required . . . . . . . 5-l
5-9. Adjustment Relationships . 5-1
5-11. Adjustment Locations . . . . . 5-1
5-13.
Initial
Operation
Procedure . . . . . . . . . . . . . 5-3
5-15. Basic Operating Checks . . . 5-3
5-17. Top Cover Removal
. . . . . . . . 5-3
5-19. Bottom Cover Removal . . . . .
5-3
5-21. A3 Board Access . . . . . . . . . . 5-3
5-23. Graphics Display Unit
Intensity and Focus
Check and Adjustment . . 5-6
5-24. DC Power Supply Adjustment 5-8
5-25. Sample Hold Switch AC
Offset Adjustment . . . . . 5-11
5-26. Demultiplexer Noise
Rejection Adjustment . . 5-13
5-27. D-A Converter Gain
Adjustment . . . . . . . . . . . . 5-16
5-28. A-D Converter Gain
Adjustment . . . . . . . . . . . . 5-18
5-29. VM Range Adjustment . . . . . . 5-20
5-30. Mass Storage Unit Test . . . 5-23
5-32. Flexible-disc Drive Access 5-23
Section
5-34.
5-36.
5-38.
5-40.
5-43.
5-46.
5-49.
5-52.
Title Page
Disc Check . . . . . . . . . . . . . . .
Flexible-disc Drive Checks
and Adjustments ..a....
Sure Flexible-disc Drive
Checks and Adjustment .
MSU DIAGNOSTICS Mode . . . . .
MSU Read Test . . . . . . . . . . . .
MSU Write Test . . . ...*.....
MSU EXERCISER . . . . . . . . . ..e
Drive Belt Tension Check
and Adjustment . . . . . . . .
5-23
5-23
5-23
5-24
5-26
5-28
5-30
5-32
5-53.
Index
Timing Check and
Adjustment . . . . . . . . . . . . 5-33
5-54.
Track Alignment Check
and Adjustment'........ 5-34
5-55. Track Zero Switch Check
and Adjustment
. ..e....e 5-38
5-56.
Jitter
Check and
Adjustment . . . . . . . . e . . . 5-41
5-57. Index Detector Alignment
Check and Adjustment . . 5-43
VI REPLACEABLE PARTS
6-l.
Introduction . . . . . . . . . . . . . 6-l
6-3.
Abbreviations .....O...... 6-l
6-5. Replaceable Parts List ..* 6-l
6-7.
Ordering Information . . . . . 6-2
6-10.
Direct Mail Order System . 6-2
VII
MANUAL CHANGES
7-1. Introduction . . . . . . . . . . . . . 7-1
7-3. Manual Changes . . . . . . . . . . . 7-l
VIII SERVICE
8-l.
Introduction . . . . . . . . . . . . . 8-l
8-3. Safety Considerations . . . . 8-l
8-5.
Recommended Test Equipment 8-l
8-7. Troubleshooting . . . . . . . . . . 8-l
8-9. Repair . . . . . . . . . . . . . . . . . . . 8-l
8-11.
Block,,iDiagram Discussion . 8-2
8-13. Board Level Theory . . . . . . . 8-4
8-15. Troubleshooting Guide . . . . 8-6
8-17. Assembly Removal . . . . . . . . . 8-8
8-18. Assembly Locations . . . . . . .
8-8
8-20. Al through A8 Board Removal 8-9
8-22. Al3 through Al6
Board Removal . . . . . . . . . . 8-9
8-24. Front Panel Removal . . . . . . 8-9 ry
8-26. Display (1345A) Removal . . 8-10
8-28. Rear Assembly A Removal
8-11
8-30. All and A12 Board Remova;: 8-11
8-32. Rear Assembly B Removal . . 8-12
8-34. FDD and A9 Board Removal . 8-13
8-36. Al Graphic Display
Control Board. . . . . . . . . . 8-69
. . .
111
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