October 2012
2-84
ColorQube 8570/8870 Service Manual
99,052, 99,053
Revised, 3rd Revision - Xerox Internal Use Only
Fault Messages and Codes
99,052, 99,053 PEST - Power Supply +12V or -15V Faults
A Power Supply error has occurred. The following troubleshooting procedure applies to these
errors.
Initial Actions
• Reboot the printer and verify the error persists.
• Check the component power connections and harness condition.
• If the problem persists, perform the following procedure.
Troubleshooting Reference
Applicable Part (Chapter 5 - Parts List)
• Electronics Module, PL 5.1 Item 1
• Power Supply Board, PL 5.1 Item 6
• Power Control Board, PL 5.1 Item 8
Wiring and Plug/Jack Reference (Chapter 7 - Wiring Data)
• Figure 9, Power Control Board P/J Locations
Procedure
CAUTION
Be careful when measuring voltages on the test pads that you do not short the probe to the
metal shell of the Electronics Module as you may cause damage.
Test the Power Supply. Check voltage at TP +12V and TP -15V (see Figure 1). Are the volt-
ages within specification (+/- 5%)?
YN
Unplug all cables from the Electronics Module and power on the printer. Remeasure TP
+12V and TP -15V.
Are the voltages within specification?
YN
Replace the Power Control Board (REP 5.6) (Electronics Module).
Plug in the cables one at a time and remeasure to determine cable/subsystem causing
the failure.
Replace the Power Control Board, Power Supply Board (REP 5.6) (Electronics Module).
Figure 1 +12V and -15V Test Points on the Power Control Board
Table 1 Applicable Fault Codes
99,052 PEST - Power Supply +12V or -15V Over Limit
99,053 PEST - Power Supply +12V or -15V Under Limit
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