Xerox PHASER 8500 Service Manual page 115

Phaser 8400/8500/8550/8560 Color Printer Service Manual
8400 PEST Description
Power supply -50 volt under limit.
37,056.47:
37,057.48: Power supply +15 volt over limit.
Power supply +15 volt under limit. Power supply +15 volt under
37,058.40:
37,059.41: Power supply -15 volt over limit.
Power supply -15 volt under limit.
37,060.42:
37,061.43: Power supply high switch will not
activate. 12, 15, and 50 volt
missing. This may be due to a
short or disconnected power
supply reset line.
Vss measurement too low. The
37,062.44:
Printhead power cable may be
disconnected.
NOTE Later version Printheads
feature a lock connector on the
printhead data cable
37,063.45: Vpp measurement too low. The
Printhead power cable may be
disconnected.
NOTE Later version Printheads
feature a lock connector on the
printhead data cable
37,064.46:
37,065.47:
37,066.48:
Troubleshooting Procedure for Power Supply
Step Questions and Actions
Run the Voltages check test.
1
Did the test pass?
Check the Printhead power cable.
2
Is the wiring damaged or not connected?
Error Messages and Codes
8500/8550/8560 PEST
Description
Power supply -50 volt under
limit.
Power supply +15 volt over limit.
limit.
Power supply -15 volt over limit.
Power supply -15 volt under
limit.
Power supply +5 volt over limit.
Power supply +5 volt under limit.
Power supply high switch will not
activate. 12, 15, and 50 volt
missing. This may be due to a
short or disconnected power
supply reset line.
Vss measurement too low. The
Printhead power may be
disconnected.
Vpp measurement too low,
Printhead power may be
disconnected. Wave amp drive
cable may be damaged or
disconnected at head driver
board or wave amp board.
The Wave Amp may be shorted.
Check the Wave Amp drive cable
(lifted ends of conductors).
Yes No
Go to Step 2. Replace the
Electronics
Module.
Reseat or Replace the
replace the Wave Amp.
wiring.
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