• Code: C0750
• Description: Document finisher EEPROM error • A backup memory error is received in serial communication data from the finisher.
• Causes: Defective optional document finisher.
• Remedy: Defective optional document finisher. Replace the document finisher with another unit and check the operation. If the operation is normal, replace or repair the document finisher.

• Code: C0960
• Description: Developing unit EEPROM error
• Causes: Poor contact in the connector terminals. Defective engine PWB. Defective developing unit.
• Remedy: Poor contact in the connector terminals. Check the connection of connector YC5 on the engine PWB and the developing unit, and the continuity across the connector terminals. Repair or replace if necessary. Defective engine PWB. Replace the engine PWB. Defective developing unit. Replace the developing unit.

• Code: C0970
• Description: Cleaning unit EEPROM error
• Causes: Poor contact in the connector terminals. Defective engine PWB. Defective cleaning unit.
• Remedy: Poor contact in the connector terminals. Check the connection of connector YC5 on the engine PWB and the cleaning unit, and the continuity across the connector terminals. Repair or replace if necessary. Defective engine PWB. Replace the engine PWB. Defective cleaning unit. Replace the cleaning unit.

• Code: C1010
• Description: Lift motor 1 error • When cassette 1 is inserted, lift limit switch 1 does not turn on within 33 s of lift motor 1 turning on. • During copying, lift limit switch 1 does not turn on within 1 s of lift motor 1 turning on.
• Causes: Broken gears or couplings of lift motor 1. Defective lift motor 1. Poor contact of lift motor 1 connector terminals. Defective lift limit switch 1. Poor contact of lift limit switch 1 connector terminals. Defective deck PWB.
• Remedy: Broken gears or couplings of lift motor 1. Replace lift motor 1. Defective lift motor 1. Check for continuity across the coil. If none, replace lift motor 1. Poor contact of lift motor 1 connector terminals. Reinsert the connector. Also check for continuity within the connector cable. If none, repair or replace the cable. Defective lift limit switch 1. Run maintenance item U031 and turn lift limit switch 1 on and off manually. Replace lift limit switch 1 if indication of the corresponding sensor on the touch panel is not displayed in reverse. Poor contact of lift limit switch 1 connector terminals. Reinsert the connector. Also check for continuity within the connector cable. If none, repair or replace the cable. Defective deck PWB. Replace the deck PWB.

• Code: C1020
• Description: Lift motor 2 error • When cassette 2 is inserted, lift limit switch 2 does not turn on within 33 s of lift motor 2 turning on. • During copying, lift limit switch 2 does not turn on within 1 s of lift motor 2 turning on.
• Causes: Broken gears or couplings of lift motor 2. Defective lift motor 2. Poor contact of lift motor 2 connector terminals. Defective lift limit switch 2. Poor contact of lift limit switch 2 connector terminals. Defective deck PWB.
• Remedy: Broken gears or couplings of lift motor 2. Replace lift motor 2. Defective lift motor 2. Check for continuity across the coil. If none, replace lift motor 2. Poor contact of lift motor 2 connector terminals. Reinsert the connector. Also check for continuity within the connector cable. If none, repair or replace the cable. Defective lift limit switch 2. Run maintenance item U031 and turn lift limit switch 2 on and off manually. Replace lift limit switch 2 if indication of the corresponding sensor on the touch panel is not displayed in reverse. Poor contact of lift limit switch 2 connector terminals. Reinsert the connector. Also check for continuity within the connector cable. If none, repair or replace the cable. Defective deck PWB. Replace the deck PWB.

• Code: C1030
• Description: Lift motor 3 error • When cassette 3 is inserted, lift limit switch 3 does not turn on within 33 s of lift motor 3 turning on. • During copying, lift limit switch 3 does not turn on within 1 s of lift motor 3 turning on.
• Causes: Broken gears or couplings of lift motor 3. Defective lift motor 3. Poor contact of lift motor 3 connector terminals. Defective lift limit switch 3. Poor contact of lift limit switch 3 connector terminals. Defective casette PWB.
• Remedy: Broken gears or couplings of lift motor 3. Replace lift motor 3. Defective lift motor 3. Check for continuity across the coil. If none, replace lift motor 3. Poor contact of lift motor 3 connector terminals. Reinsert the connector. Also check for continuity within the connector cable. If none, repair or replace the cable. Defective lift limit switch 3. Run maintenance item U031 and turn lift limit switch 3 on and off manually. Replace lift limit switch 3 if indication of the corresponding sensor on the touch panel is not displayed in reverse. Poor contact of lift limit switch 3 connector terminals. Reinsert the connector. Also check for continuity within the connector cable. If none, repair or replace the cable. Defective casette PWB. Replace the casette PWB

• Code: C1040
• Description: Lift motor 4 error • When cassette 4 is inserted, lift limit switch 4 does not turn on within 33 s of lift motor 4 turning on. • During copying, lift limit switch 4 does not turn on within 1 s of lift motor 4 turning on.
• Causes: Broken gears or couplings of lift motor 4. Defective lift motor 4. Poor contact of lift motor 4 connector terminals. Defective lift limit switch 4. Poor contact of lift limit switch 4 connector terminals. Defective casette PWB.
• Remedy: Broken gears or couplings of lift motor 4. Replace lift motor 4. Defective lift motor 4. Check for continuity across the coil. If none, replace lift motor 4. Poor contact of lift motor 4 connector terminals. Reinsert the connector. Also check for continuity within the connector cable. If none, repair or replace the cable. Defective lift limit switch 4. Run maintenance item U031 and turn lift limit switch 4 on and off manually. Replace lift limit switch 4 if indication of the corresponding sensor on the touch panel is not displayed in reverse. Poor contact of lift limit switch 4 connector terminals. Reinsert the connector. Also check for continuity within the connector cable. If none, repair or replace the cable. Defective casette PWB. Replace the casette PWB.

• Code: C1140
• Description: Side feeder lift motor going up error (optional side feeder) • Upper limit detection switch does not turn off within 15 s of the side feeder lift motor starting (within 200 ms during paper feeding).
• Causes: Poor contact of upper limit detection switch connector terminals. Defective side feeder main PWB. Defective side feeder lift motor.
• Remedy: Poor contact of upper limit detection switch connector terminals. Reinsert the connector. Also check for continuity within the connector cable. If none, repair or replace the cable. Defective side feeder main PWB. Replace the side feeder main PWB. Defective side feeder lift motor. Run maintenance mode U247 and measure the voltage between terminals YC5-A12 (side feeder main circuit board) and YC6- B11. (Make sure all of LUSSW, UCSSW, LLSSW and RCSSW are off.) Despite either DC24V or DC-24V is observed but if the side feeder lift motor does not operate, replace the side feeder lift motor.