Epson AcuLaser C2900N Service Manual page 68

Chapter 1 Troubleshooting
Step
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?
8
Does the error still occur when the power is turned OFF and
9
ON?
Checking the HARN ASSY KSNR REGCL for continuity.
Disconnect J26 from the PWBA MCU.
10
Disconnect J261 from the K Mode Sensor.
Is each cable of J26 <=> J261 continuous?
Checking the power to the K Mode Sensor.
Disconnect J26 from the PWBA MCU.
11
Is the voltage across P26-1pin <=> ground on the PWBA
MCU, about +3.3 VDC?
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
12
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?
Epson AcuLaser C2900N
Check
1 - 55
Remedy
Yes
Reconnect the
connector(s) P/
Go to step 10. J26 and/or P/
J261correctly,
then go to step 9.
Go to step 10. End of work.
Replace the
Go to step 11. HARN ASSY
KSNR REGCL.
Replace the
Go to step 12. PWBA MCU.
(Refer to RRP8.9.)
Replace the Replace the
PWBA MCU. DRIVE ASSY PH.
(Refer to RRP8.9.) (Refer to RRP7.3.)
Revision B
No
Confidential