Xerox C2424 - WorkCentre Color Solid Ink Service Manual page 131

37,016.43:
PEST 50 V power supply test. The 50 V power supply is loaded with the
head maintenance clutch and then tested. The expected power from the supply is not
being drawn. This error may be caused by a power supply that is faulty or shorted by
some other 50 V device.
50V Power Supply Fault Troubleshooting Procedure
Step Questions and Actions
1 Checking for a short in electronics module.
NOTE: Damage to circuits within the electronics
module may occur if the power supply
capacitors are not allowed to fully
discharge.
1. Turn off the printer and wait 30 seconds for
the power supply capacitors to discharge.
2. It is possible that the power supply is not
shorted but instead is out of spec, which
leads to an error condition.
3. Measure the 50V power supply output. The
test point is located on the power control
board below the main board RAM DIMMs.
4. Is the power supply within specification?
2
1. Unplug the following electronics module
connectors. This step disconnects all other
external circuits so the electronics module
can be tested alone:
Power Control to I/O board (J800 - gray
ribbon cable on right side)
Power Control right (J400 – 16 wire, multi-
color)
Printhead data interface (J130 – gray
ribbon cable on top side)
Wave amp signal (J790) short gray ribbon
cable located on left side)
Printhead power connector
Power Control left (J390 – 34 wire, multi-
color)
Y-Axis motor (J280)
2.Turn on power to the printer.
3. Do the PE and PS indicators flash
momentarily?
3 1. Turn off the printer and wait 30 seconds for
power supply capacitors to discharge.
2. Plug in the power control to I/O board
connector (J800).
3. Turn on power to the printer.
4. Do the PE and PS indicators flash
momentarily?
Error Messages and Codes
Yes
Go to Step 2. Go to Step 2.
Go to Step 3. Replace the
electronics
module.
Go to Step 4. Go to Step 5.
No
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