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copierwhisper
05-26-2015, 07:11 PM
KM C451 with FN-517 Jam Code 72-20

Symptom: Jamming when stapling 8 1/2 x 11 portrait. Paper is left sitting just before the exit rollers of the finisher, stapled but will not exit the machine. When stapling 8 1/2 x 11 landscape the paper is stapled and exits without error.

What I've done so far: Replaced the finisher exit gate solenoid, actuator and sensor (PS6). Replaced foam roller in stacker unit that works in conjunctions with the paper lift belt (roller was severely worn). Updated firmware to the machine and finisher. Removed exit roller drive motor to inspect and clean (seems ok), reseated all connectors on the finisher main controller board and cleaned sensors to include PS20. The symptom has not changed. Inspects the rear gear of the belt that lifts the paper out of the stacker, it has the updated metal gear and is not broken. The "tab" on the belt seems normal and able to life paper correctly. Possible timing issue? Any thoughts or suggestions are welcome! Thanks!

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