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

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02/2000
2-46 DocuPrint N2125
RAP 54
Initial Issue Status Indicator Repair Analysis Procedures
RAP 54 550 Sheet Feeder Assembly Not Recognized
Controller does not recognize the Feeder Assembly.
Procedure
Check the alignment of the printer to the 550 Sheet Feeder and the alignment of the top 550
Sheet Feeder to the second 550 Sheet Feeder, if installed. Ensure that the connectors are
properly aligned and properly connected. All connectors are properly aligned and con-
nected.
Y
N
Reseat the feeders and printer to obtain proper alignment and connection.
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 Con-
troller PWB, check the voltage between P/J33 pin 13 and frame ground. The voltage is
24VDC.
Y
N
On the Print Engine Controller PWB, check the voltage between P/J33 pin 6 and frame
ground. The voltage is 24.0VDC.
Y
N
Replace the Print Engine Controller PWB (
REP 9.3 ).
Remove Paper Tray 2. Check the voltage between the bottom terminal on the mating con-
nector on the Tray 2 feeder and frame ground. The voltage is 24.0VDC.
Y
N
Remove paper tray 1. Check the voltage between the bottom terminal on the mating
connector on the Tray 1 feeder and frame ground. The voltage is 24.0VDC.
Y
N
Replace the Tray 1 Size PWB (
REP 3.13 ). If the problem persists, replace the
Tray 1 Feeder PWB ( REP 3.9 ).
Check the resistance between the bottom and top terminals of the mating connector
on paper tray 1. There is continuity between the two pins.
Y
N
Replace the paper tray mating connector (
PL 2.2 ).
Check that the paper tray mating connector and the feeder mating connector are
properly aligned when the tray 1 is inserted into the feeder. The mating connectors
are properly connected when the paper tray is inserted.
Y
N
Repair or replace components as necessary.
Replace the Tray 1 Size PWB ( REP 3.13 ). If the problem persists, replace the Tray 1
Feeder PWB ( REP 3.9 ).
Check the resistance between the bottom and top terminals of the mating connector on
the paper tray 2. There is continuity between the two pins.
Y
N
Replace the paper tray mating connector (
PL 2.2 ).
Check that the paper tray mating connector and the feeder mating connector are properly
aligned when the tray is inserted into the feeder. The mating connectors are properly
connected when the paper tray is inserted.
Y
N
Repair or replace components as necessary.
Replace the Tray 2 Size PWB ( REP 11.19 ). If the problem persists, replace the Tray 2
Feeder PWB ( REP 11.9 ).
The printer has two optional 550 Sheet Feeders installed.
Y
N
Replace the Printer Engine Controller PWB (
REP 9.3 ).
On the Print Engine Controller PWB, check the voltage between P/J33 pin 14 and frame
ground. The voltage is 24.0VDC.
Y
N
Remove Paper Tray 3. Check the voltage between the bottom terminal on the mating con-
nector on the Tray 3 feeder and frame ground. The voltage is 24.0VDC.
Y
N
Replace the Tray 3 Size PWB (
REP 11.19 ). If the problem persists, replace the Tray
3 Feeder PWB ( REP 11.9 ).
Check the resistance between the bottom and top terminals of the mating connector on
paper tray 3. There is continuity between the two pins.
Y
N
Replace the paper tray mating connector (
PL 2.2 ).
Check that the paper tray mating connector and the feeder mating connector are properly
aligned when the tray is inserted into the feeder. The mating connectors are properly
connected when the paper tray is inserted.
Y
N
Repair or replace components as necessary.
Replace the Tray 3 Size PWB ( REP 11.19 ). If the problem persists, replace the Tray 3
Feeder PWB ( REP 11.9 ).
Replace the Print Engine Controller PWB ( REP 9.3 ).
A
A
B
B