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50V Power Supply Fault Troubleshooting Procedure (Continued)
Step
Questions and Actions
If the 50V Power Supply LED (viewed thru the cooling grill below the power cord
4
1.
receptacle) illuminates, the short is on one of the external devices you unplugged
earlier. In this case, systematically turn off the printer, plug a wiring harness back
in, and turn the printer on until the 50V supply fails.
Replace the defective part. Retest the printer.
2.
To isolate the problem to the I/O board or its
5
1.
related cabling, unplug the I/O board
connectors. Umbilical Right J1
Waste Tray Sense J110
Stripper Solenoid J250
Paper Tray Sense J610Ink load Signal J910
DMU Sense J860
Drum Thermistor J870
Exit Module J680
Heater Relay Control J950
Test the resistance of the I/O board.
2.
Is the resistance still less than 1K ohm?
3.
Plug in the I/O board connectors one at a time and retest the resistance.
6
1.
Replace the component that creates a short at J270.
2.
3-40
Yes
Replace the I/O
board.
WorkCentre C2424 Service Manual
No
Go to Step 6.
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Table of Contents
Troubleshooting
