Description: Fax control PWB program archive problem • When power is turned on, the compressed program in the Flash ROM on the optional fax control PWB was not successfully decompressed.
Causes: Defective fax control PWB.
Remedy: Replace the fax control PWB and check for correct operation.
Code: C0920
Description: Fax file system error • The backup data is not retained for file system abnormality of flash memory of the optional fax control PWB.
Causes: Defective fax control PWB.
Remedy: Replace the fax control PWB and check for correct operation.
Code: C2000
Description: Main motor problem • LOCK ALM signal remains high for 1 s, 1 s after the main motor has turned on.
Causes: Poor contact in the main motor connector terminals. Defective main motor rotation control circuit. Defective drive transmission system.
Remedy: Reinsert the connector. Also check for continuity within the connector cable. If none, remedy or replace the cable. Replace the main motor. Check if the rollers and gears rotate smoothly. If not, grease the bushings and gears. Check for broken gears and replace if any.
Code: C3100
Description: Scanner carriage problem • The home position is not correct when the power is turned on or copying the document placed on the contact glass.
Causes: Poor contact of the connector terminals. Defective scanner home position sensor. Defective engine PWB or scanner PWB. Defective scanner motor.
Remedy: Check the connection of connectors YC10, 11 on the engine PWB and the continuity across the connector terminals. Repair or replace if necessary. Replace the scanner home position sensor. Replace the engine PWB or scanner PWB and check for correct operation. Replace the scanner motor.
Code: C3200
Description: Exposure lamp problem • In indicator check before starting copying, the average value in scanning of the shading plate with the CCD is 128 or more.
Causes: Defective scanner PWB. Defective exposure lamp or inverter PWB. Incorrect shading position. Poor contact of the connector terminals.
Remedy: Replace the scanner PWB and check for correct operation. Replace the exposure lamp or inverter PWB. Adjust the position of the contact glass (shading plate). If the problem still occurs, replace the scanner home position sensor. Check the connection of connector YC7 on the scanner PWB, and the continuity across the connector terminals. Repair or replace if necessary.
Code: C4000
Description: Polygon motor synchronization problem • The polygon motor does not reach the stable speed within 15 s of the START signal turning on.
Causes: Poor contact in the polygon motor connector terminals. Defective polygon motor. Defective engine PWB (KP-5238).
Remedy: Reinsert the connector. Also check for continuity within the connector cable. If none, remedy or replace the cable. Replace the LSU. Replace the engine PWB and check for correct operation.