Epson AcuLaser C2900N, Service Manual

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Chapter 1 Troubleshooting
Epson AcuLaser C2900N
Revision B
Confidential
FIP-1.29 061-370: IOT ROS Failure
Step Check
Remedy
Yes No
Possible causative parts:
ROS ASSY (PL4.1.1)
HARN ASSY ROS RE (PL4.1.22)
HARN ASSY ROS VIDEO (PL4.1.23)
PWBA MCU (PL8.2.13)
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 PWBA MCU.
Reseat the PWBA MCU.
Does the error still occur when the power is turned OFF
and ON?
Go to step 3. End of work.
3
Checking after resetting the ROS ASSY.
Reseat the ROS ASSY.
Does the error still occur when the power is turned OFF
and ON?
Go to step 4. End of work.
4
Check the connections between the ROS ASSY and
PWBA MCU.
Are P/J40, P/J41, P/J411 and P/J412 connected correctly?
Go to step 6.
Reconnect the
connector(s) P/
J40, P/J41, P/J411
and/or P/J412
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 HARN ASSY ROS RE for continuity.
Disconnect P/J40 from the PWBA MCU.
Disconnect P/J411 from the ROS ASSY.
Is each cable of J40 <=> J411 continuous?
Go to step 7.
Replace the
HARN ASSY ROS
RE.
7
Checking the HARN ASSY ROS VIDEO for continuity.
Disconnect J41 from the PWBA MCU.
Disconnect J412 from the ROS ASSY.
Is each cable of J41 <=> J412 continuous?
Go to step 8.
Replace the
HARN ASSY ROS
VIDEO.
8
Checking after replacing the ROS ASSY.
Replace the ROS ASSY. (Refer to RRP4.1.)
Does the error still occur when the power is turned OFF
and ON?
Replace the
PWBA MCU.
(Refer to RRP8.9.)
End of work.