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

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02/2000
2-14 DocuPrint N2125
RAP 4
Initial Issue Status Indicator Repair Analysis Procedures
RAP 4 Tray # Failure Power Off/On (C3)
Tray Assembly (Tray 1, Tray 2, or Tray 3) are not in place.
Procedure
Enter Diagnostics, run a test print from every tray (see section 6). The Error Code specifies
Tray 2 or Tray 3.
Y
N
Remove and reinstall Tray 1. Press key “0”. The C3 error code still appears.
Y
N
Problem solved.
Measure the voltage from the lower contact of the Paper Feeder Socket (P/J672) and
frame ground. The voltage is +24VDC.
Y
N
Measure the voltage from P/J33 pin 6 on the Print Engine Controller PWB and frame
ground. The voltage is +24VDC.
Y
N
Go to
RAP 2 .
Switch off the printer power. Remove the Size Sensor Housing ( REP 3.11 ). Measure
continuity between the disconnected P/J33 pin 6 to P/J331 pin 12 on the Tray 1 Size
PWB. There is continuity between the two pins.
Y
N
Repair or replace Feeder Harness Assembly (
PL 9.1 ).
On the Tray 1 Size PWB, measure continuity between P/J331 pin 12 to P/J61 pin 1.
There is continuity between the two pins.
Y
N
Replace the Tray 1 Size PWB (
REP 3.13 ).
Check the wiring between P/J67 pin 5 on the Tray 1 Feeder PWB and the bottom pin
on the Paper Feeder Socket (P/J672). If in good condition, replace the Tray 1 Feeder
PWB (
REP 3.9 ).
On the paper tray, measure the resistance between the middle and bottom terminals on
the Paper Feeder Socket. The resistance is 75 to 105 ohms.
Y
N
Go to
RAP 37
On the paper tray, measure the resistance between the top and bottom terminals on the
Paper Feeder Socket. There is continuity (0 ohms) between the two pins.
Y
N
Repair or replace the Paper Feeder Socket.
Replace the following parts one at a time until the problem is resolved:
•
Stack Height Sensor (3.4)
• Feeder PWB (3.9)
• Size 1 PWB (3.13)
• Print Engine Controller PWB (9.3)
Remove and reinstall the Tray indicated. Press key “0”. The C3 error code still appears.
Y
N
Problem solved.
Exchange Tray 1 with the Tray generating the “C3” code. Run a test print from each tray. The
error code now indicates a Tray 1 failure.
Y
N
The error code indicates a Tray 2 failure.
Y
N
Remove the Tray 3 from the paper feeder. Check the voltage between the lower ter-
minal on the Paper Feeder Connector and frame ground. The voltage is +24VDC
Y
N
Check the wiring harnesses between the Tray 2 Size PWB (P/J53) and the Tray
3 Size PWB (P/J54). Repair or replace if necessary. If the harnesses are in
good condition, replace the Tray 3 Size PWB (
REP 11.19 ) then the Tray 3
Feeder PWB ( REP 11.9 ).
Replace the following components, in order, until the problem is resolved:
•
Stack Height Sensor ( REP 11.13 )
• Feeder PWB ( REP 11.9 )
• Size PWB ( REP 11.19 )
• Print Engine Controller PWB ( REP 9.3 ).
Remove the Tray 2 from the paper feeder. Check the voltage between the lower terminal
on the Paper Feeder Connector and frame ground. The voltage is +24VDC
Y
N
Check the wiring harnesses between the Tray 1 Size PWB (P/J51) and the Tray 2
Size PWB (P/J52). Repair or replace if necessary. If the harnesses are in good con-
dition, replace the Tray 2 Size PWB (
REP 11.19 ) then the Tray 2 Feeder PWB ( REP
11.9 ).
Replace the following components, in order, until the problem is resolved:
•
Stack Height Sensor ( REP 11.13 )
• Feeder PWB ( REP 11.9 )
• Size PWB ( REP 11.19 )
• Print Engine Controller PWB ( REP 9.3 ).
Remove the Tray now occupying the Tray 1 position and continue with RAP 37 .
A
A