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

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02/2000
2-47 DocuPrint N2125
RAP 55, RAP 56
Status Indicator Repair Analysis Procedures Initial Issue
RAP 55 Duplex Unit Fail or Removed (E9-1)
Duplex Unit was removed while power was on.
Procedure
Switch the printer power off. Remove and reinstall the Duplex Unit. Switch the printer power on.
Run a Config Sheet. The Duplex Unit is listed on the Config Sheet.
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 ). Switch the printer power on. On the Print
Engine Controller PWB, check the voltage between P/J34 pin 9 and frame ground. The
voltage is 3.3VDC with the duplex Unit removed and 0.0VDC with the Duplex Unit
installed.
Y
N
Check the wiring harnesses. If in good condition, replace the Duplex PWB (
REP
12.4 ). If the problem persists, replace the Print Engine Controller PWB ( REP 9.3 ).
Replace the Print Engine Controller PWB ( REP 9.3 ).
Problem Solved.
RAP 56 Paper Jam Open Front Cover (E7)
Paper is early to the Registration Sensor, paper is late to or late off the Registration Sensor, or
the Registration Sensor is actuated at power on.
Procedure
Open the printer and check for paper or other obstructions in the paper path. Remove the
Duplex Assembly and check the rear entrance chute to the Paper Handler. The printer is free
of jammed paper, paper scraps, or other obstructions.
Y
N
Clear all jammed paper, paper scraps, and obstructions from the printer.
Check the Duplex Belt, Rollers, and gears. Check for contamination, wear, and obstructions.
The Duplex rollers, gears, and belt are clean and in good condition.
Y
N
Replace components or Duplex Assembly as necessary (
REP 12.1 ).
Reinstall the Duplex Assembly. Enter diagnostics and select Test Print. Run 15 to 20 duplex
test prints. The error code reappears.
Y
N
Problem solved.
Select Component Test. Scroll to Duplex Motor Low and press Enter. Then scroll to Duplex
Motor Hi and press Enter. You can hear the Duplex Motor run at both speeds.
Y
N
Remove the Duplex Assembly then remove the Duplex Cover (
REP 12.3 ). Disconnect P/
J38 from the Duplex PWB. Measure the resistance on the disconnected plug between pin
1 and pin 2; between pin 1 and pin 3; between pin 1 and pin 4; and between pin 1 and pin
5. All four readings are between 30 and 37 ohms.
Y
N
Replace the Duplex Motor Assembly (
REP 12.8 ).
Replace the Duplex PWB ( REP 12.4 ). If the problem persists, replace the Print Engine
Controller PWB ( REP 9.3 ).
Press [0] for one second to stop all tests. Scroll to Sensor Input test and press Enter. Use a
small strip of paper to actuate and deactuate the Duplex Transport Sensor. The number on
the LCD increments each time you press and release the actuator.
Y
N
Replace the Duplex Sensor Assembly (
REP 12.13 ). If the problem persists, replace the
Print Engine Controller PWB ( REP 9.3 ).
Perform RAP 32 to test the Registration Sensor. The Registration Sensor is working cor-
rectly.
Y
N
Replace the Registration Sensor (
REP 5.4 ).
Replace the Print Engine Controller PWB ( REP 9.3 ).
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