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03/02 Level 2 Troubleshooting

WorkCentre Pro 423/428 2-139 CHAPTER 2 TROUBLESHOOTING

Motor doesn’t rotate FIP

Before this FIP, check that the motor is not locked or loaded.

Enter Chain XX Func XXX in Diag (CE) mode. Turn on the

power.

Is the voltage +24 VDC between the PWB pin 3(+) and GND(-)?

Is the voltage +24 VDC between pin 2(+) of the motor and

GND(-)?

Is the voltage +24 VDC between pin 1(+) of the motor

and GND(-)?

Is the voltage +24 VDC between the PWB pin 4

(+) and GND(-)?

Replace the PWB.

Repair an open wire or poor contact of the wire

from the PWB pin 4 and motor pin 1.

Replace the motor?

Check between the PWB Pin 3 and motor Pin 2 for an open

wire or poor contact.

Replace the PWB.

Motor keeps rotating FIP

Turn off the power. Disconnect the PWB connector.

Is the resistance within 10 between the connector pin 3 and

Frame?

Replace the PWB.

Check the circuit from the connector pin 3 to motor pin 2 for a

short circuit. If no problem is found, replace the motor.

Relay PWB

Xerox WorkCentre Pro 423 Service Manual

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