Gestetner A193 Service Manual page 265

SC CODE DESCRIPTIONS
SC306: Charge roller home position error
-Definition- [B]
The charge roller contact sensor does not detect the on condition.
- Possible causes -
•
Charge roller contact sensor defective
•
Charge roller contact clutch defective
SC320: Polygon motor error
-Definition- [B]
The polygon motor does not reach its operating speed within 10 seconds
after the polygon motor on signal, or the lock signal is not detected for
more than 40 ms continuously during operation.
- Possible causes -
•
Polygon motor defective
•
Poor connection of the interface harness which connects the polygon
motor driver and the IOCSS board
•
IOCSS board defective
SC321: No laser start signal (F-GATE error)
NOTE: This SC code is only for copy mode.
- Definition- [B]
The CPU does not detect the laser start signal (F-GATE) after the copy
paper reaches the registration sensor.
- Possible causes -
•
BiCU board defective
•
MSU board defective
SC322: Laser synchronization error
-Definition- [B]
The laser synchronization signal cannot be detected by the main scan
synchroniziation detector board for more than 5 consecutive 100 intervals.
- Possible causes -
•
Poor connection of the interface harness which connects the laser
synchronization detector board and the BiCU board
•
Laser synchronization detector board out of position
•
Laser synchronization detector board defective
•
BiCU board defective
(A193) 6-4 SM