Epson AcuLaser C2900N, Service Manual

Page: 66 / 681

1 - 53
Chapter 1 Troubleshooting
Epson AcuLaser C2900N
Revision B
Confidential
FIP-1.26 042-326: IOT Sub Motor Failure
Step Check
Remedy
Yes No
Possible causative parts:
DRIVE ASSY SUB (PL7.1.1)
PWBA MCU (PL8.2.13)
HARNESS ASSY SUB MOT MG SFP (PL9.1.8)
1
Does the error still occur when the power is turned OFF and
ON?
Go to step 2. End of work.
2
Checking after resetting the fuser unit and DRUM
CARTRIDGE
Reseat the fuser unit and DRUM CARTRIDGE.
Warning: Start the operation after the fuser unit has
cooled down.
Does the error still occur when the power is turned OFF and
ON?
Go to step 3. End of work.
3
Checking the Sub Motor for rotation.
Does the Sub Motor function normally?
- PC Operation :
Checked by [Fuser Motor Operation Check] of the [Machine
Check] in Tool Box.
- Panel Operation : Checked by [Digital Output] - [Sub
Motor] of [IOT Diag] in diagnosis.
Replace the
PWBA MCU.
(Refer to RRP8.9.)
Go to step 4.
4
Checking the connectors of the SUB MOTOR for
connection.
Check the connections between the PWBA MCU and
DRIVE ASSY SUB.
Are P/J22 and P/J221 connected correctly?
Go to step 6.
Reconnect the
connector(s) P/
J22 and/or P/J221
correctly, then go
to step 5.
5
Does the error still occur when the power is turned OFF and
ON?
Go to step 6. End of work.
6
Checking the HARNESS ASSY SUB MOT MG SFP for
continuity.
Disconnect J22 from the PWBA MCU.
Disconnect J221 from the DRIVE ASSY SUB.
Is each cable of J22 <=> J221 continuous?
Go to step 7.
Replace the
HARNESS ASSY
SUB MOT MG
SFP.
7
Checking after resetting the DRIVE ASSY SUB.
Reseat the DRIVE ASSY SUB.
Does the error still occur when the power is turned OFF and
ON?
Go to step 8. End of work.
8
Checking the power to the DRIVE ASSY SUB.
Disconnect J22 from the PWBA MCU.
Are the voltages across J22-2pin/J22-4pin <=> ground on
the PWBA MCU, about +24 VDC when the interlock switch
(HARN ASSY INTERLOCK) is pushed?
Replace the
DRIVE ASSY
SUB. (Refer to
RRP7.1.)
Replace the
PWBA MCU.
(Refer to RRP8.9.)