Epson AcuLaser C2900N Service Manual page 107

Chapter 1 Troubleshooting
Step
Checking the connectors of the Exit Sensor in the fuser unit
for connection.
Check the connections between the PWBA MCU and fuser
unit.
Are P/J17 and P/J171 connected correctly?
11
Checking the HARNESS ASSY FUSING UNIT MG SFP for
continuity.
Remove the fuser unit.
12
Disconnect J17 from the PWBA MCU.
Is each cable of J17 <=> P171 continuous?
NOTE: P171 is attached to the frame.
Checking the power to the Exit Sensor in the fuser unit.
Disconnect the connector of J17 on the PWBA MCU.
13
Is the voltage across J17-1pin <=> ground on the PWBA
MCU, about +3.3 VDC?
Checking the Exit Sensor for operation.
Check the voltage across J17-3pin <=> ground on the
14 PWBA MCU.
Does the voltage change, when the actuator of the Exit
Sensor is operated?
Epson AcuLaser C2900N
Check
1 - 94
Remedy
Yes
Reconnect the
connector(s) P/
Go to step 12.
J17 and/or P/J171
correctly.
Replace the
HARNESS ASSY
Go to step 13.
FUSING UNIT MG
SFP.
Replace the
Go to step 14. PWBA MCU.
(Refer to RRP8.9.)
Warning: Start the
operation after the
fuser unit has
cooled down.
Replace the
Replace the fuser
PWBA MCU.
unit. (Refer to
(Refer to RRP8.9.)
RRP6.1.) After
replacement, be
sure to clear the
life counter value.
Revision B
No
Confidential