Xerox N2125N - DocuPrint B/W Laser Printer Service Manual page 49

RAP 30 Laser Assembly
Procedure
Enter Diagnostics and select Component Test. Scroll to ROS Motor and press Enter. You can
hear the ROS Motor spin up.
Y N
Switch the printer power off. Remove the Left Interface Cover
1.2), and the Left Plate Assembly (REP
age between P/J21 pin 10 on the Print Engine Controller PWB and frame ground. The
voltage is 24.0 VDC.
Y N
Check the voltage between P/J28 pin 1 on the Print Engine Controller PWB and
frame ground. The voltage is 24.0 VDC.
Y N
Replace the LVPS (REP
Replace the Print Engine Controller PWB
Enter Diagnostics and select Component Test. Scroll to ROS Motor Operation. Check the
voltage between P/J21 pin 12 and frame ground. Press the Enter key. The
drops from 5.0 VDC to 0.0 VDC.
Y N
Replace the Print Engine Controller PWB
Replace the Laser Assembly (REP
Switch the printer power off. Remove the Left Interface Cover
and the Left Plate Assembly (REP 1.11). Switch the printer power on. Check the voltage
between P21 pin 6 and frame ground. The voltage is +5.0VDC.
Y N
Check the voltage between P/J28 pin 7 and frame ground. The voltage is +5.0VDC.
Y N
Replace the LVPS (REP 9.5).
Check the voltage between P/J25 pin 3 and frame ground. The voltage is +5.0VDC.
Y N
Go to RAP 36.
Replace the Print Engine Controller PWB
Measure the voltage between P/J21 pin 9 and frame ground. The voltage is +5.0VDC.
Y N
Replace the Print Engine Controller PWB
Replace the Laser Assembly (REP 7.4).
Status Indicator Repair Analysis Procedures
RAP 30 , RAP 31
(REP 1.1) Left Cover
1.11). Switch the printer power on. Check the volt-
9.5).
(REP 9.3).
(REP 9.3).
7.4).
(REP 1.1) Left Cover
(REP 9.3).
(REP 9.3).
RAP 31 Fuser Assembly
Procedure
If the printer has been switched on, the fuser may be hot.
Switch the printer power off. Remove the Fuser Assembly
(REP
between pins A4 and A5 of P272
(depending on the temperature of the fuser).
Y N
Replace the Fuser Top Cover
Measure the resistance between pins 3 and 4 of P272 on the Fuser Assembly
resistance is less than 5 ohms.
Y N
Remove the Fuser Heat Rod
resistance is less than 5 ohms.
Y N
Replace the Heat Rod
voltage
Replace the Fuser Top Cover
(REP 1.2),
Reinstall the Fuser Assembly. Remove the Left Interface Cover
1.2), and the Left Plate Assembly
the resistance between P11 pin 1 and pin 2. There is less than 5 ohms resistance.
Y N
Repair or replace the Fuser Harness Assembly
Reconnect P/J11 and disconnect P/J27. Measure the resistance between P/J27 pins 1 and 2
(Figure 1). The resistance is between 7K and 380K ohms (depending on the temperature
of the fuser).
Y N
Repair or replace the Fuser Harness Assembly
A
02/2000
2-32
WARNING
(REP 6.2). Measure the resistance
(Figure 1). The resistance is between 7K and 380K ohms
(REP 6.9).
(REP 6.9). Measure the resistance of the Heat Rod. The
(REP 6.9).
(REP 6.9).
Figure 1 Fuser Connector (P272)
(REP
(REP 1.11). Disconnect P/J11 from the LVPS PWB. Check
(REP 6.3).
(REP 6.3).
(Figure 1). The
1.1), Left Cover (REP
Initial Issue
DocuPrint N2125