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

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02/2000
2-36 DocuPrint N2125
RAP 37 , RAP 38
Initial Issue Status Indicator Repair Analysis Procedures
RAP 37 Tray Motor Assembly Checkout Procedure
Procedure
NOTE: Tray 1 interlocks the 24VDC supply to the Tray 1 Size PWB, Tray 1 Feeder PWB, Tray 2
and Tray 3. Tray 2 interlocks the 24VDC supply to the Tray 2 Size PWB, Tray 2 Feeder PWB,
and Tray 3. Tray 3 interlocks the 24VDC supply to the Tray 3 Size PWB and the Tray 3 Feeder
PWB.
Switch the printer power off. Remove the Paper Tray to be tested. Switch the printer power on.
Measure the voltage from the lower contact of the Paper Feeder Socket to frame ground. The
voltage is +24 VDC.
Y
N
Go to RAP 2.
On the left side of the paper tray, measure the motor winding resistance from the middle con-
tact to the lower contact of the Paper Feeder Connector. The resistance reading is between
110 - 130 ohms.
Y
N
Disconnect J673 from the 3 pin Paper Feeder Connector. Measure resistance between
pins 1 and 4. The resistance reading is between 110 - 130 ohms.
Y
N
Replace the Motor Assembly (REP 2.4).
Replace Paper Feeder Connector (PL 2.2).
Check the Paper Tray for damage, contamination, binding, misalignment or obstruction. All
components are clean, connected properly, aligned properly and without damage.
Y
N
Repair/replace as necessary.
Replace the Motor Assembly (REP 2.4).
RAP 38 Registration Clutch
Procedure
Enter Diagnostics and select Component Test. Scroll to Confirm Reg. Clutch and press Enter.
You can hear the Registration Clutch 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 9 on the disconnected plug.
The resistance is approximately 145 to 165 ohms.
Y
N
Remove the Front Cover (
REP 1.6 ) and the Left Front Cover ( REP 1.7 ). Disconnect
P/J43 from the Connector PWB. Measure the resistance between pins 1 and 2 on
the disconnected plug. The resistance is approximately 145 to 165 ohms.
Y
N
Replace the Registration Clutch (
REP 5.5 ).
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 Reg. Clutch. Check the
voltage between P/J23 pin 9 and frame ground. Press Enter. The voltage drops from
+24VDC to 0.0VDC.
Y
N
Replace the Print Engine Controller PWB (
REP 9.3 ).
Replace the Registration Clutch ( REP 5.5 )
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 Reg. Clutch and press Enter.
The Registration Rolls rotate smoothly without stalling or jerking.
Y
N
Replace the Registration Clutch (
REP 5.5 ) or Registration Rolls ( REP 5.6 ).
Problem Solved.