Xerox N2125N - DocuPrint B/W Laser Printer, Service Manual

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02/2000
2-38 DocuPrint N2125
RAP 41 , RAP 42
Initial Issue Status Indicator Repair Analysis Procedures
RAP 41 MBF Feed Solenoid
Procedure
Enter Diagnostics and select Component Test. Scroll to Confirm MBF Feed Solenoid and press
Enter. You can hear the MBF Feed Solenoid energize.
Y
N
Switch the printer power off. Remove the Left Interface Cover (
REP 1.1 ), Left Cover ( REP
1.2 ), and the Left Plate Assembly ( REP 1.11 ). Disconnect P/J23 on the Print Engine Con-
troller PWB. Measure the resistance between pins 6 and 12 on the disconnected plug.
The resistance is approximately 75 to 95 ohms.
Y
N
Remove the Front Cover (
REP 1.6 ) and the Left Front Cover ( REP 1.7 ). Disconnect
P/J44 from the Connector PWB. Measure the resistance between pins 1 and 2 on
the disconnected plug. The resistance is approximately 75 to 95 ohms.
Y
N
Replace the MBF Feed Solenoid (
REP 4.9 ).
Replace the Connector PWB ( REP 9.7 ).
Reconnect P/J23. Switch the printer power on. Check the voltage between P/J23 pin 6
and frame ground. The voltage is +24VDC.
Y
N
Replace the Print Engine Controller PWB (
REP 9.3 ).
Enter Diagnostics and select Component Test. Scroll to Confirm MBF Feed Solenoid.
Check the voltage between P/J23 pin 12 and frame ground. Press Enter. The voltage
drops from +24VDC to 0.0VDC when you press Enter.
Y
N
Replace the Print Engine Controller PWB (
REP 9.3 ).
Replace the MBF Feed Solenoid ( REP 4.9 )
Switch the printer power off. Open the Front Cover and remove the Print Cartridge. With the
Front Cover open, cheat the Front Cover Interlock. Enter Diagnostics and select Component
Test. Scroll to Main Motor and press Enter. Scroll to Confirm MBF Feed Solenoid and press
Enter. The MBF Feed Rolls make one complete revolution then stop.
Y
N
Replace the MBF Feed Solenoid (
REP 4.9 ).
The MBF Feed Solenoid appears to operate correctly. If the problem persists, replace the Print
Engine Controller PWB (
REP 9.3 ).
RAP 42 System Controller Isolation
Procedure
Switch the printer power off. Disconnect all cables connected to the rear of the System Control-
ler PWB. Remove the Left Interface Cover (
REP 1.1 ). Remove all options from the System
Controller PWB. Switch the printer power on. The printer boots up correctly and Ready is
displayed on the Control Panel (if no options are installed, follow the No path).
Y
N
Switch the printer power off. Remove then reinstall the System Controller PWB (
REP 9.2 )
to reseat the connection with the Print Engine Controller PWB. Switch the printer power
on. The printer boots up correctly and Ready is displayed on the Control Panel.
Y
N
Replace the System Controller PWB (
REP 9.2 ).
Problem Solved.
Switch the printer power off. Reinstall one of the removed options or cables. Switch the printer
power on. The printer boots up correctly and Ready is displayed on the Control Panel.
Y
N
Replace the option or cable just installed.
Repeat the last step with the next option or cable until the problem is found.