Epson AcuLaser C2900N Service Manual page 70

Chapter 1 Troubleshooting
FIP-1.29 061-370: IOT ROS Failure
Step
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)
Does the error still occur when the power is turned OFF
1
and ON?
Checking after resetting the PWBA MCU.
Reseat the PWBA MCU.
2
Does the error still occur when the power is turned OFF
and ON?
Checking after resetting the ROS ASSY.
Reseat the ROS ASSY.
3
Does the error still occur when the power is turned OFF
and ON?
Check the connections between the ROS ASSY and
PWBA MCU.
Are P/J40, P/J41, P/J411 and P/J412 connected correctly?
4
Does the error still occur when the power is turned OFF
5
and ON?
Checking the HARN ASSY ROS RE for continuity.
Disconnect P/J40 from the PWBA MCU.
6
Disconnect P/J411 from the ROS ASSY.
Is each cable of J40 <=> J411 continuous?
Checking the HARN ASSY ROS VIDEO for continuity.
Disconnect J41 from the PWBA MCU.
7
Disconnect J412 from the ROS ASSY.
Is each cable of J41 <=> J412 continuous?
Checking after replacing the ROS ASSY.
Replace the ROS ASSY. (Refer to RRP4.1.)
8
Does the error still occur when the power is turned OFF
and ON?
Epson AcuLaser C2900N
Check
1 - 57
Remedy
Yes
Go to step 2. End of work.
Go to step 3. End of work.
Go to step 4. End of work.
Reconnect the
connector(s) P/
J40, P/J41, P/J411
Go to step 6.
and/or P/J412
correctly, then go
to step 5.
Go to step 6. End of work.
Replace the
Go to step 7. HARN ASSY ROS
RE.
Replace the
Go to step 8. HARN ASSY ROS
VIDEO.
Replace the
PWBA MCU. End of work.
(Refer to RRP8.9.)
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