Fluke 900 - Manual (Page 5)

TEST 53 PULLl XTRIG................................................................................................................. 3 - 20
TEST 54 PULL_XEVENT.................................................................................................... ......... 3 - 21
TEST55SHADINIT........................................................................................................................ 3 - 2 1
TEST E60 WALK_SIZELEDS....................................................................................................... 3 - 22
TESTE61 TESTMEMORY............................................................................................................ 3 - 2 2
TESTE62WALKMONLEDS......................................................................................................... 3 - 2 3
TEST E63 UPDATE VCC LIM..................................................................................................... 3 - 23
TEST E64 SHAD ADDR .7........................................................................................................... 3 - 24
TESTE70KEY_CLOSURE............................................................................................................. 3 - 2 4
TEST E71 DISP_RAM................................................................................................................... 3 - 24
TESTE74DISP_CHAR_SET................ ......................................................................................... 3 - 2 5
TESTE75CART_SLFT................................................................................................................... 3 - 2 5
TEST E76 TEST C ENG................................................................................................................. 3 - 25
TEST E77 ACT_CROSS................................................................................................................ 3 - 25
TESTE78TRG_CROSS................................................................................................................ 3 - 2 6
TESTE79FRQ_CROSS.................................................................................................................. 3 - 2 6
TEST E80 FLT_CROSS.................................................................................................................. 3 - 26
3.4 System Error Codes.................................................................................................................. 3 - 2 7
4 Troubleshooting....................................................................................................................................... 4-1
4.1 Test Result Interpretation............................................................................................................. 4-1
4.2 Selftest / Circuit Block Reference Table....................................................................................... 4-2
4.3 Selftest Circuit Block Diagrams................................................................ ................................... 4 - 4
4.4 Failure Examples............................................................................................................................ 4 - 2 3
4.4.1 IB Reversal........................................................................................................................... 4 - 2 3
4.4.2 Static-blown HSB................................................................................................................ 4 - 2 4
4.4.3 Missing -5 V......................................................................................................................... 4 - 25
5 Maintenance............................................................................................................................................. 5 -1
5.1 Performing a Complete System Checkout..................................................................................... 5-1
5.2 Performing Adjustments................................................................................................................. 5-2
5.2.1 Adjustment to Vcc................................................................................................................ 5-2
5.2.2 Adjustment to Display Contrast.................................. ....................................................... 5-2
5.2.3 Changing System Firmware ............................................................................................... 5 - 2
5.2.4 Fuses and 110/220 V Conversion........................................................................................ 5-3
5.3 Disassembly and Assembly Instructions........................................................................................ 5-3
5.3.1 Microprocessor Board.......................................................................................................... 5 - 3
5.3.2 Keyboard.............................................................................................................................. 5 - 4
5.3.3 Speaker................................................................................................................................. 5 - 5
5.3.4 Display Controller............................................................................................................... 5 - 5
5.3.5 Display.................................................................................................................................. 5 - 5
5.3.6 High Speed Board................................................................................................................ 5 - 6
5.3.7 Power Supply....................................................................................................................... 5-6
5.3.7.1 Fan.............................................................................................................................. 5 - 6
5.3.8 Interface Buffer Board......................................................................................................... 5 - 7
5.4 Calibration Procedures ................................................................................................................... 5-7
5.4.1 Interface Buffer Calibration................................................................................................ 5 - 7
5.4.2 High Speed Board Calibration................................................................... ......................... 5-7
5.4.2.1 Calibration Data Format............................................................................................. 5-7
5.42.2 Calibration Standards............................................................................................... 5-8
5.4.2.3 HSB Component Placement...................................................................................... 5 - 8
5.4.2.4 The Offset Shift (OS) Definition............................................................................... 5 - 9
5.4.2.4.1 Example 1 (for negative offsets)......................... ......................................... 5-9
u