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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
Checking for a short in electronics module.
1
NOTE:
Damage to circuits within the electronics
module may occur if the power supply
capacitors are not allowed to fully
discharge.
Turn off the printer and wait 30 seconds for
1.
the power supply capacitors to discharge.
It is possible that the power supply is not
2.
shorted but instead is out of spec, which
leads to an error condition.
Measure the 50V power supply output. The
3.
test point is located on the power control
board below the main board RAM DIMMs.
Is the power supply within specification?
4.
Unplug the following electronics module
2
1.
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.
Do the PE and PS indicators flash
3.
momentarily?
Turn off the printer and wait 30 seconds for
3
1.
power supply capacitors to discharge.
Plug in the power control to I/O board
2.
connector (J800).
Turn on power to the printer.
3.
Do the PE and PS indicators flash
4.
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
3-39
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Troubleshooting
