• Code: C1900
• Description: Paper feeder EEPROM error (optional paper feeder)
  When writing the data, the write data and the read data is not continuously in agreement three times.
• Causes: Poor contact in the connector terminals.
  Defective engine PWB.
  Defective paper feeder.
• Remedy: Poor contact in the connector terminals. Check the connection of connector YC27 on the engine PWB and the connector on the PF main PWB, and the continuity across the connector terminals. Repair or replace if necessary.
  Defective engine PWB. Replace the engine PWB and check for correct operation.
  Defective paper feeder. Replace the paper feeder with another unit and check the operation. If the operation is normal, replace or repair optional paper feeder.

• Code: C1950
• Description: Transfer belt unit EEPROM error
  No response is issued from the device in reading/writing for 5 ms or more and this problem is repeated five times successively. Mismatch of reading data from two locations occurs eight times successively. Mismatch between writing data and reading data occurs eight times successively.
• Causes: Poor contact in the connector terminals.
  Defective transfer belt speed PWB (inner transfer belt unit).
• Remedy: Poor contact in the connector terminals. Check the connection of connector YC28 on the engine PWB and the connector of the transfer belt unit, and the continuity across the connector terminals. Repair or replace if necessary.
  Defective transfer belt speed PWB (inner transfer belt unit). Replace the transfer belt unit.

• Code: C2101
• Description: Developing motor K error
  The rated speed achievement signal does not turn to L within 2 s since developing motor K is activated. The rated speed achievement signal is at the H level for 1 s continuously after developing motor K is stabilized.
• Causes: Poor contact in the connector terminals.
  Defective drive transmission system.
  Defective developing motor K.
  Defective engine PWB.
• Remedy: Poor contact in the connector terminals. Check the connection of connector YC16 on the engine PWB and the connector of the developing motor K, and the continuity across the connector terminals. Repair or replace if necessary.
  Defective drive transmission system. Check if the rollers and gears rotate smoothly. If not, grease the bushings and gears. Check for broken gears and replace if any.
  Defective developing motor K. Run maintenance item U030 and check if the developing motor K operates when YC16-B4 (remote signal) on the engine PWB goes low. If not, replace the developing motor K.
  Defective engine PWB. Run maintenance item U030 and check if YC16-B4 (remote signal) on the engine PWB goes low. If not, replace the engine PWB.

• Code: C2102
• Description: Developing motor MCY error
  The rated speed achievement signal does not turn to L within 2 s since developing motor MCY is activated. The rated speed achievement signal is at the H level for 1 s continuously after developing motor MCY is stabilized.
• Causes: Poor contact in the connector terminals.
  Defective drive transmission system.
  Defective developing motor MCY.
  Defective engine PWB.
• Remedy: Poor contact in the connector terminals. Check the connection of connector YC16 on the engine PWB and the connector of the developing motor MCY, and the continuity across the connector terminals. Repair or replace if necessary.
  Defective drive transmission system. Check if the rollers and gears rotate smoothly. If not, grease the bushings and gears. Check for broken gears and replace if any.
  Defective developing motor MCY. Run maintenance item U030 and check if the developing motor MCY operates when YC16-A4 (remote signal) on the engine PWB goes low. If not, replace the developing motor MCY.
  Defective engine PWB. Run maintenance item U030 and check if YC16-A4 (remote signal) on the engine PWB goes low. If not, replace the engine PWB.

• Code: C2201
• Description: Drum motor K steady-state error
  Drum motor K does not keep the steady-state speed for 5 s successively since the motor is stabilized.
• Causes: Poor contact in the connector terminals.
  Defective drum motor K.
  Defective PWB.
• Remedy: Poor contact in the connector terminals. Check the connection of connector YC8 on the motor control PWB and the connector of the drum motor K, and the continuity across the connector terminals. Repair or replace if necessary.
  Defective drum motor K. Replace the drum motor K.
  Defective PWB. Replace the motor control PWB or engine PWB and check for correct operation.

• Code: C2202
• Description: Drum motor C steady-state error
  Drum motor C does not keep the steady-state speed for 5 s successively since the motor is stabilized.
• Causes: Poor contact in the connector terminals.
  Defective drum motor C.
  Defective PWB.
• Remedy: Poor contact in the connector terminals. Check the connection of connector YC6 on the motor control PWB and the connector of the drum motor C, and the continuity across the connector terminals. Repair or replace if necessary.
  Defective drum motor C. Replace the drum motor C.
  Defective PWB. Replace the motor control PWB or engine PWB and check for correct operation.

• Code: C2203
• Description: Drum motor M steady-state error
  Drum motor M does not keep the steady-state speed for 5 s successively since the motor is stabilized.
• Causes: Poor contact in the connector terminals.
  Defective drum motor M.
  Defective PWB.
• Remedy: Poor contact in the connector terminals. Check the connection of connector YC5 on the motor control PWB and the connector of the drum motor M, and the continuity across the connector terminals. Repair or replace if necessary.
  Defective drum motor M. Replace the drum motor M.
  Defective PWB. Replace the motor control PWB or engine PWB and check for correct operation.

• Code: C2204
• Description: Drum motor Y steady-state error
  Drum motor Y does not keep the steady-state speed for 5 s successively since the motor is stabilized.
• Causes: Poor contact in the connector terminals.
  Defective drum motor Y.
  Defective PWB.
• Remedy: Poor contact in the connector terminals. Check the connection of connector YC7 on the motor control PWB and the connector of the drum motor Y, and the continuity across the connector terminals. Repair or replace if necessary.
  Defective drum motor Y. Replace the drum motor Y.
  Defective PWB. Replace the motor control PWB or engine PWB and check for correct operation.