Epson AcuLaser C2900N Service Manual page 73

Chapter 1 Troubleshooting
Step
Checking the Regi. Sensor (SENSOR PHOTO) for
operation.
Does the number on the screen increase by one, when the
actuator (ACTUATOR REGI IN) is operated?
18
Remove the CHUTE ASSY LOW (PL3.2.27) once to check
the operation.
Checked by [Digital Input] - [Regi Sensor] in [IOT Diag] of
diagnosis.
Checking the connectors for connection.
Check the connections between the PWBA MCU and
DRIVE ASSY MAIN (Main Motor).
Are P/J21 and P/J211 connected correctly?
19
Checking the HARNESS ASSY MAIN MOT MG SFP for
continuity.
20 Disconnect J21 from the PWBA MCU.
Disconnect J211 from the DRIVE ASSY MAIN.
Is each cable of J21 <=> J211 continuous?
Checking the power to the DRIVE ASSY MAIN.
Disconnect J21 from the PWBA MCU.
21 Are the voltages across J21-2pin/J21-4pin <=> ground on
the PWBA MCU, about +24 VDC when the interlock switch
(HARN ASSY INTERLOCK) is pushed?
Checking the connectors of the SOLENOID FEED MSI
(Tray 1 Feed Solenoid) for connection.
Check the connections between the PWBA MCU and
SOLENOID FEED MSI.
Are P/J23 and P/J231 connected correctly?
22
Checking the HARN ASSY L SIDE for continuity
Disconnect J23 from the PWBA MCU.
23
Disconnect P231 from the SOLENOID FEED MSI.
Is each cable of J23 <=> P231 continuous?
Epson AcuLaser C2900N
Check
1 - 60
Remedy
Yes
Replace the
PWBA MCU. Go to step 26.
(Refer to RRP8.9.)
Reconnect the
connector(s) P/
Go to step 20.
J21 and/or P/J211
correctly.
Replace the
HARNESS ASSY
Go to step 21.
MAIN MOT MG
SFP.
Replace the
Replace the
DRIVE ASSY
PWBA MCU.
MAIN. (Refer to
(Refer to RRP8.9.)
RRP7.2.)
Reconnect the
connector(s) P/
Go to step 23.
J23 and/or P/J231
correctly.
Replace the
Go to step 24. HARN ASSY L
SIDE.
Revision B
No
Confidential