Originally Posted by
Athlontini
This was my first time seeing this code on any machine, and after reading the daunting service manual entry on the SC and finding pretty much no information on it on CTN, I decided to report my findings so that future techs who run into this can hopefully get it resolved a little faster. This code was on an MPC4503, but would probably be the same on any machine with a single-pass DF.
Specifically, my symptom was this: Power machine on, J001 misfeed in ARDF. Open and close door, misfeed goes away and immediately returns. On the third time it pops the code.
Service manual says for SC186:
CIS LED error
During initialization:
§ The ratio between the average values of leading-edge area
and rear-edge area is out of specification.
§ Shading data peak value is below specification.
During scanning:
§ Shading data peak value is below specification.
Details:
During initialization:
§ Occurs when one out of two CIS LEDs is malfunctioning,
causing the difference between the average values of
leading-edge area and rear-edge area to be large (CIS LED
error detection).
§ Occurs when both of the CIS LEDs are malfunctioning
(unlit), causing the shading data peak value to be extremely
low (CIS white level adjustment).
During scanning:
§ Occurs when both of the CIS LEDs are malfunctioning
(unlit), causing the shading data peak value to be extremely
low (CIS scan control, gray balance
adjustment/confirmation).
§ The first and second consecutive occurrences of each
constitute initial/feed jams. The third occurrence constitutes
an SC.
(An initialization jam/transport jam occurs on 2 continuous
occasions during either initialization or transport, and on the 3rd
continuous occasion, an SC is generated)
During initialization:
§ One or two out of two CIS LEDs are defective
During scanning:
§ Both of the CIS LEDs are defective.
Service Call 101-195
SM 5-19 D146/D147/D148/D149/D150
Troubleshooting
SC No. Level Error Name/Error Condition/Major Cause/Solution
1. Reconnect the power/signal harness.
2. Replace the following parts:
§ Replace the CIS and CIPB.
§ Replace the CIS background white roller.
§ Replace the power/signal harness.
§ Replace the ADF main control board.
I called Ricoh on it and all the guy on the phone did was read the service manual, then tell me to replace the very first thing it listed (CIS and CIPB). The issue was that there was a LOT of gunk on the rear slit glass, accessible from the underside of the ARDF. Don't order parts, guys. Clean that glass and your problem should resolve immediately.
If anyone else has information on this, or maybe some different symptoms/scenarios where they've encountered it, I'd love to hear from you.
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