Sharp AR-651 Service Handbook page 206

[C1A] Abnormal tandem LCF end fense motor
(paper can be fed from cassettes other than the tandem LCF)
Is the LCF end fence motor working? (Perform the output check in the test mode: 03-207)
NO
YES
Are the tandem LCF end fence home/stop position sensors working?
(Perform the input check in the test mode: 03-[ENERGY SAVER]OFF/[7]/[A], /[7]/[B])
NO
YES
1. Check if the driving mechanism is abnormal.
2. Check if the conductor pattern on the LGC board is short- or open-circuited.
3. Replace the LGC board.
AR-651/810 TROUBLE SHOOTING
1. Check if the connector of the tandem LCF end fence motor is disconnected.
2. Check if the connector J346 on the LGC board is disconnected.
3. Check if the connector pins are disconnected and the harnesses are open-circuited.
4. Check if the conductor pattern on the LGC board is short- or open-circuited.
5. Replace the LGC board.
1. Check if the connectors of the sensors are disconnected.
2. Check if the connector J346 on the LGC board is disconnected.
3. Check if the slit reaches the sensors.
4. Check if the connector pins are disconnected and the harnesses are open-circuited.
5. Check if the conductor pattern on the LGC board is short- or open-circuited.
6. Replace the LGC board.
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