Sharp AR-650, Service Handbook

Page: 139 / 200

4 - 11 TROUBLE SHOOTING
[Communications error]
Is the interface cable normal?
No Replace the interface cable.
Yes
(1) Check or replace the control board.
(2) Check or replace the main unit PPC board.
[Size detection error]
Is the voltage measured at SIZE-SNS1 (TP9) +5V when there is paper?
No Check or replace size sensor 1.
Yes
Is the voltage measured at SIZE-SNS2 (TP29) +5V when there is paper?
No Check or replace size sensor 2.
Yes
Is the original slipping off the aligning roller?
No Check or replace the control board.
Yes
Clean or replace the aligning roller.
Check and adjust the roller pressure.
[Error of the STOP position of original’s leading edge]
Is the voltage measured at REG-SNS (TP25) +5V when there is paper?
No Check or replace the aligning sensor.
Yes
Is the reflection mirror at the aligning sensor normal?
No Clean or replace the reflection mirror.
Yes
Check or replace the control board.