Xerox WORKCENTRE C2424, Руководство по обслуживанию

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General Troubleshooting 4-63
d.
Unplug the following electronics module connectors: This step removes all
other circuits so the electronics module can be tested alone (see also "Plug/
Jack Locator Table" on page 10-2).
■
Power Control to I/O board (J800)
■ Power Control right (J400)
■
Printhead data cable (J130)
■ Waveamp signal (J790)
■
Power Control left (J390)
■ Y-Axis motor (J280)
■
Scanner power supply
■ Exit module data cable
■
Door sensor(s) Exit cover and Front door
e.
Plug in power cord and power on the system
f.
If the PE and PS indicators do not flash, replace the electronics module and
retest the system.
g.
If PE and PS indicators do flash, continue with troubleshooting procedures.
5.
Short circuit on 3.3 V power supply within the I/O board.
a.
REQUIRED: Follow all procedures from Step 4 before proceeding with
these steps. The I/O board needs to be isolated from other systems in the
system to be effectively tested.
b.
Turn off system and wait 30 seconds for power supply capacitors to
discharge. Damage to circuits within the electronics module may occur if the
power supply capacitors are not allowed to fully discharge.
c.
Plug in the Power Control to I/O board connector (J800). This step adds the
I/O board back to the working electronics module - nothing else is
connected.
d.
Power on the system.
6.
If the PE and PS indicators do not flash, the short is on the I/O board or related
cabling.
a.
Verify short is on the I/O board by using an ohmmeter to check the resistance
on J270, pin 1 to ground. Resistance of less than 1K ohm indicates a
problem.
b.
To isolate the problem to the I/O board or related cabling, unplug the
following I/O board connectors :
■
Umbilical Right J400
■ Waste Tray Sense J110
■
Stripper Solenoid J250
■ Paper Tray Sense J610
■
Front Door Sense J600
■ Inkload Signal J910
■
DMU Sense J860
■ Drum Thermistor J870