HP 8753E - Inspect the Motherboard

‘able 5-4. Recommended Order for Removal/Disconnection
Assembly
To Remove
1. A3 Source
2. A7 Pulse Generator
3. A4 R Sampler
4. A5 A Sampler
6. A6 B Sampler
6. A9 CPU
7. A2 Front Panel Interface
8. Al6 Rear Panel Interface
Removal or
OtherAssemblieathat Receive
Disconnection Method
Power from the Removed Assembly
Remove from Card Cage
None
Remove from Card Cage
None
Remove from Card Cage
None
Remove from Card Cage
None
F&move from Card Cage
None
Disconnect W36 and W36 A20 Disk Drive
Disconnect W17 Al Front Panel Keyboard
Disconnect W27 A25 Test Set Interface
A24 Transfer Switch
AZ3 LED Front Panel
Inspect the Motherboard
Inspect the Al7 motherboard for solder bridges and shorted traces. In
particuIar, inspect the traces that cany the supplies whose LEDs faulted when
A8TP4 (SDIS) was grounded earlier.
5-18 Power Supply Troubleshooting