Xerox N2125N - DocuPrint B/W Laser Printer Service Manual page 51

RAP 33 MBF No Paper Sensor
Procedure
Enter Diagnostics and select Component Test. Scroll to Sensor Input test and press Enter.
Actuate and deactuate the MBF No Paper Sensor. The number on the LCD increments
each time you press and release the actuator.
Y N
The actuator moves freely and is in good condition (not broken or damaged).
Y N
Replace the MBF No Paper Sensor Actuator
Switch the printer power off. Remove the Left Interface Cover
1.2), and the Left Plate Assembly
Engine Controller PWB, measure the voltage between P/J23 pin 14 and frame ground.
The voltage is +3.3VDC with the MBF No Paper Sensor deactuated and 0.0VDC with
the Sensor actuated.
Y N
Switch the printer power off. Remove the Left Front Cover
printer power on. On the Connector PWB, measure the voltage between P/J45 pin 3
and frame ground. The voltage is +3.3VDC with the MBF No Paper Sensor deac-
tuated and 0.0VDC with the Sensor actuated.
Y N
Check the voltage between P/J45 pin 1 and frame ground. The
1.2VDC.
Y N
Replace the Print Engine Controller PWB
Replace the MBF No Paper Sensor
Replace the Connector PWB
Replace the Print Engine Controller PWB
It appears that the MBF No Paper Sensor is working correctly. If a problem persists, replace the
Print Engine Controller PWB (REP 9.3).
Status Indicator Repair Analysis Procedures
RAP 33 , RAP 34
(REP 4.5).
(REP 1.1), Left Cover
(REP 1.11). Switch the printer power on. On the Print
(REP 1.7). Switch the
(REP 9.3).
(REP 4.8).
(REP 9.7).
(REP 9.3).
RAP 34 Tray 1 No Paper Sensor
Procedure
Remove Tray 1. Enter Diagnostics and select Component Test. Scroll to Sensor Input test and
press Enter. Actuate and deactuate the Tray 1 No Paper Sensor Actuator. The number on the
LCD increments each time you press and release the actuator.
Y N
Visually inspect the Tray 1 No Paper Sensor Actuator. The actuator moves freely and is
in good condition (not broken or damaged).
Y N
Replace the Tray 1 No Paper Sensor Actuator
(REP
Switch the printer power off. Remove the Left Interface Cover
1.2), and the Left Plate Assembly
Engine Controller PWB, measure the voltage between P/J33 pin 2 and frame ground as
you actuate and deactuate the No paper Sensor. The voltage is 3.3VDC with the sen-
sor deactuated and 0.0VDC with the sensor actuated.
Y N
Check the voltage between P/J33 pin 8 and frame ground. The voltage 3.3VDC.
Y N
Replace the Print Engine Controller PWB
voltage is Replace the Tray 1 Feeder PWB
Replace the Print Engine Controller PWB
It appears that the Tray 1 No Paper Sensor is working correctly. If a problem persists, replace
the Print Engine Controller PWB
02/2000
2-34
(REP 3.3).
(REP 1.1), Left Cover
(REP 1.11). Switch the printer power on. On the Print
(REP 9.3).
(REP 3.9).
(REP 9.3).
(REP 9.3).
(REP
Initial Issue
DocuPrint N2125