Epson AcuLaser C2900N, Service Manual

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Chapter 1 Troubleshooting
Epson AcuLaser C2900N
Revision B
Confidential
8
Checking the connectors of the K Mode Sensor in the
DRIVE ASSY PH for connection
Check the connections between the PWBA MCU and K
Mode Sensor.
Are P/J26 and P/J261 connected correctly?
Go to step 10.
Reconnect the
connector(s) P/
J26 and/or P/
J261correctly,
then go to step 9.
9
Does the error still occur when the power is turned OFF and
ON?
Go to step 10. End of work.
10
Checking the HARN ASSY KSNR REGCL for continuity.
Disconnect J26 from the PWBA MCU.
Disconnect J261 from the K Mode Sensor.
Is each cable of J26 <=> J261 continuous?
Go to step 11.
Replace the
HARN ASSY
KSNR REGCL.
11
Checking the power to the K Mode Sensor.
Disconnect J26 from the PWBA MCU.
Is the voltage across P26-1pin <=> ground on the PWBA
MCU, about +3.3 VDC?
Go to step 12.
Replace the
PWBA MCU.
(Refer to RRP8.9.)
12
Checking the K Mode Sensor for operation.
Remove the DRIVE ASSY PH from the printer once, but P/
J261 and P/J24 should be connected.
Checked by [Digital Input] - [DI-04] in [IOT Diag] of
diagnosis.
During this check, close the COVER ASSY FRONT MG.
Does the status (L or H) change, when a piece of paper is
inserted into the gap of the K Mode Sensor?
Replace the
PWBA MCU.
(Refer to RRP8.9.) Replace the
DRIVE ASSY PH.
(Refer to RRP7.3.)
Step Check
Remedy
Yes No