Epson AcuLaser C2900N Service Manual page 42

Chapter 1 Troubleshooting
FIP-1.4 010-397: IOT Fuser Unit Failure
Step
Possible causative parts:
FUSER UNIT (PL6.1.1)
HARNESS ASSY FUSING UNIT MG SFP (PL6.1.2)
PWBA LVPS (PL8.2.1)
PWBA MCU (PL8.2.13)
HARNESS ASSY LVPS MAIN MG SFP (PL9.1.3)
Does the error still occur when the power is turned OFF and
1
ON?
Checking after resetting the fuser unit.
Reseat the fuser unit.
Warning: Start the operation after the fuser unit has
2
cooled down.
Does the error still occur when the power is turned OFF and
ON?
Checking the connectors for connection.
Remove the fuser unit.
Warning: Start the operation after the fuser unit has
cooled down.
Check the connections between the PWBA MCU (P/J17)
and fuser unit (P/J171).
Check the connections between the fuser unit (P/J171) and
PWBA LVPS (P/J47).
Check the connections between the PWBA LVPS (P/J501
and P/J502) and PWBA MCU (P/J14 and P/J15).
Are these connectors connected correctly?
3
Does the error still occur when the power is turned OFF and
4
ON?
Checking the HARNESS ASSY FUSING UNIT MG SFP for
continuity.
Disconnect J17 from the PWBA MCU.
5
Disconnect J47 from the PWBA LVPS.
Is each cable of J17 and J47 <=> P171 continuous?
NOTE: P171 is attached to the frame.
Checking the HARNESS ASSY LVPS MAIN MG SFP for
continuity.
6 Disconnect J14 from the PWBA MCU.
Disconnect J501 from the PWBA LVPS.
Is each cable of J14 <=> J501 continuous?
Epson AcuLaser C2900N
Check
1 - 29
Remedy
Yes
Go to step 2. End of work.
Go to step 3. End of work.
"Reconnect the
connector(s) P/
J17, P/J47, P/
Go to step 5. J171, P/J501, P/
J502, P/J14 and/
or P/J15 correctly,
then go to step 4."
Go to step 5. End of work.
Replace the
HARNESS ASSY
Go to step 6.
FUSING UNIT MG
SFP.
Replace the
HARNESS ASSY
Go to step 7.
LVPS MAIN MG
SFP.
Revision B
No
Confidential