HP Integral Personal Computer Service Manual page 5

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Contenta
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6.1
6.2
6.3
6.4
6.5
6.6
6.1
6.8
6.9
6.9.1
6.9.2
6.10
6.11
6.12
6.12.1
6.12.2
6.12.3
6.12.4
6.13
6.14
6.15
6.15.1
6.15.2
6.16
6.16.1
6.16.2
6.16.3
7
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8.1
8.2
8.2.1
8.2.2
8.2.3
8.2.4
8.3
8.4
8.S
8.5.1
8.5.2
8.5.3
8.5.4
8.5.5
8.6
Int ..... P ......... Computer
Removal .ncI Repla.lDent
Introcluction ..................................................... 6-1
Safety Considerations .................. . . . . . . . . . . . . . . . . . . . . . . . . . .. 6-1
ESD Considerations .............................................. 6-1
Req,uired Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 6-2
Removing the Back Case .......................................... 6-3
Removing the tid ................................................ 6-3
Rer.noving the Logic A
P~
....................................... 6-4
Removing the Logic B PCA ....................................... 6-6
The Printer Asser.nbly ... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 6-9
Rentoving the Printer ........................................... 6-9
Servicing the Printer ........................................... 6-12
Removing the Disc Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 6-19
Removing the Display Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 6-21
The Base
Asse~bly
.............................................. 6-26
Removing the Base Assembly ................................... 6-26
Removing the I/O Backplane PCA ............................... 6-29
Removing the HP-IB Ribbon-Cable Assembly ...................... 6-29
Removing the Power-Supply Assembly ........................... 6-29
Removing the Fan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 6-32
Removing the Keyboard Connector Assembly ........................ 6-32
The Keyboard .................................................. 6-32
Removing the Keyboard Assembly ............................... 6-33
Replacing the Keyboard Legs .................................... 6-35
The ROM Assembly ............................................. 6-36
Removing the ROM Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 6-36
Disassembling the System V ROM Assembly ...................... 6-38
Replacing the ROM Connector Pins .............................. 6-40
Adjustments
Troubl •• hootlng .nd Di_gnostics
Introduction ................................................. . . .. 8-1
Description of Diagnostics ......................................... 8-1
Turn-On Self Tests ............................................. 8-2
Service ROM Diagnostic Tests .................................... 8-2
Service Diagnostic Disc Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 8-4
Error Number Interpretation ..................................... 8-4
Safety Considerations ...... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 8-5
RequUed Toom and Equipment" ..................................... 8-5
Main Diagnostic Procedure ........................................ 8-6
Problem Analysis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 8-8
Thrn-On Self Tests ............................................. 8-8
Service ROM Tests ............................................. 8-9
Service Diagnostic Disc Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 8-11
Functional Verification ......................................... 8-13
Troubleshooting and Repair .............................. , . . . . . . .. 8-13