3
Routine Maintenance
Introduction ................................................................................ 3-2
Line voltage selection ................................................................. 3-2
Line fuse replacement ................................................................. 3-2
4
Troubleshooting
Introduction ................................................................................ 4-2
Safety considerations .................................................................. 4-2
Repair considerations ................................................................. 4-2
Power-on self test ....................................................................... 4-3
Front panel tests .......................................................................... 4-3
KEYS test ............................................................................ 4-3
DISPLAY PATTERNS test ................................................. 4-3
CHAR SET test ................................................................... 4-4
Principles of operation ................................................................ 4-4
Overall block diagram ......................................................... 4-5
Analog circuits .................................................................... 4-6
Power supply ....................................................................... 4-8
Digital circuitry ................................................................... 4-9
Troubleshooting ........................................................................ 4-10
Display board checks ........................................................ 4-10
Power supply checks ......................................................... 4-11
Digital circuitry checks ..................................................... 4-12
Analog circuitry checks ..................................................... 4-13
No comm link error .................................................................. 4-14
5
Disassembly
Introduction ................................................................................ 5-2
Handling and cleaning ................................................................ 5-2
Handling PC boards ............................................................ 5-2
Solder repairs ....................................................................... 5-2
Static sensitive devices ............................................................... 5-3
Assembly drawings ..................................................................... 5-3
Case cover removal ..................................................................... 5-4
Input board removal .................................................................... 5-4
Mother board removal ................................................................ 5-5
Front panel disassembly ............................................................. 5-6
Removing power components .................................................... 5-6
Power supply module removal ............................................ 5-6
Power module removal ........................................................ 5-6
Power transformer removal ................................................. 5-7
Содержание 2500
Страница 2: ...Contains Calibrating and Servicing Information Model 2500 Dual Photodiode Meter Service Manual...
Страница 11: ......
Страница 13: ......
Страница 15: ......
Страница 16: ...1 PerformanceVerification...
Страница 28: ...2 Calibration...
Страница 56: ...3 RoutineMaintenance...
Страница 59: ...3 4 Routine Maintenance Model 2500 Service Manual...
Страница 60: ...4 Troubleshooting...
Страница 74: ...5 Disassembly...
Страница 81: ...5 8 Disassembly Model 2500 Service Manual...
Страница 82: ...6 ReplaceableParts...
Страница 93: ...6 12 Replaceable Parts Model 2500 Service Manual...
Страница 94: ...A Specifications...
Страница 98: ...B CalibrationReference...
Страница 108: ...C CalibrationProgram...
Страница 117: ......
Страница 119: ......
Страница 120: ......
Страница 121: ...Keithley Instruments Inc 28775 Aurora Road Cleveland Ohio 44139 Printed in the U S A...