Xerox Phaser 7760 Service Manual page 421

A B C D
Y N
Replace the Clutch or Solenoid.
One of the two wires between the control PWB and the Clutch or Solenoid
is open. Repair or replace the wiring as required.
Replace the Control PWB.
There is less than 1 VDC between the switched leg of the control PWB and
GND.
Y N
Replace the PWB.
Replace the Clutch or Solenoid.
The clutch or solenoid appears to be functioning correctly. Refer to the Circuit Diagram for
the RAP that sent you here. Check the wires for loose connections or damage that may
cause intermittent operation. Perform any required adjustments.
There is a short circuit on the switched leg (J543 pin A6 in the example) from the solenoid or
clutch. Check the wire for a short circuit to GND. If the wire is OK, replace the solenoid. If the
problem persists, replace the controlling PWB.
Figure 1 OF 99-4 Generic Solenoid/Clutch
Revised
Phaser 7760 Color Laser Printer
OF 99-6 2 Wire Motor Open
Procedure
NOTE: Before performing this RAP, ensure that the motor is free to rotate.
There is +24 VDC measured between Pin 3(+) of the PWB and GND(-).
Y N
There is +24 VDC measured between the Motor Pin 2(+) of the Motor and GND(-).
Y N
There is +24 VDC measured between the Motor Pin 1(+) of the Motor and GND(-).
Y N
There is +24 VDC measured between the PWB Pin 4(+) of the PWB and GND(-
).
Y N
Replace the PWB.
Check the wire between the PWB Pin 4 and the Motor Pin 1 for an open circuit
or poor contact.
Replace the motor.
Check the wire between the PWB Pin 3 and the Motor Pin 2 for an open circuit or poor
contact.
Replace the PWB.
January 2010
2-385
Figure 1 OF 99-6 Motor
Status Indicator RAP's
OF 99-4, OF 99-6