Epson AcuLaser C2900N Service Manual page 101

Chapter 1 Troubleshooting
Step
Checking the ROLLER ASSY DUP for shape and operation.
Are ROLLER ASSY DUP seated correctly?
8 Also, are they not contaminated and/or damaged, and
rotated smoothly?
Check these items by turning with your finger.
Checking the HARN ASSY DUP RELAY for continuity
Disconnect J27 from PWBA MCU.
9
Disconnect P272 from HARN ASSY DUP RELAY.
Is each cable of J27 <=> P272 continuous?
Checking the connectors of the SENSOR PHOTO (Regi
Sensor) for connection.
10 Check the connections between the PWBA MCU and
SENSOR PHOTO.
Are P/J23 and P/J232 connected correctly?
Checking the HARN ASSY L SIDE for continuity.
Disconnect J23 from the PWBA MCU.
11
Disconnect J232 from the SENSOR PHOTO.
Is each cable of J23 <=> J232 continuous?
Checking the power to the SENSOR PHOTO.
Disconnect J23 from the PWBA MCU.
12
Is the voltage across P23-3pin <=> ground on the PWBA
MCU, about +3.3 VDC?
Checking the SENSOR PHOTO for operation.
Check the voltage across 23-5pin <=> ground on the PWBA
MCU.
13 Remove the CHUTE ASSY LOW (PL3.2.27) once to check
the operation.
Does the voltage change, when the actuator of the
SENSOR PHOTO is operated?
Checking after replacing FEEDER ASSY DUP SFP STD.
14 Replace FEEDER ASSY DUP SFP STD.
Does the error still occur when printing?
Checking after replacing fuser unit.
Replace fuser unit.
Warning: Start the operation after the fuser unit has
15 cooled down.
Does the error still occur when printing?
NOTE: After replacement, be sure to clear life counter
value.
Epson AcuLaser C2900N
Check
1 - 88
Remedy
Yes
Replace ROLLER
Go to step 9. ASSY DUP. (Refer
to RRP9.2.)
Replace HARN
ASSY DUP
Go to step 14.
RELAY. (Refer to
RRP1.12.)
Reconnect the
connector(s) P/
Go to step 11.
J23 and/or P/J232
correctly.
Replace the
Go to step 12. HARN ASSY L
SIDE.
Replace the
Go to step 13. PWBA MCU.
(Refer to RRP8.9.)
Replace the
Replace the Regi
PWBA MCU.
Sensor.
(Refer to RRP8.9.)
Go to step 15. End of work.
Replace the
PWBA MCU. End of work.
(Refer to RRP8.9.)
Revision B
No
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