• Code: C1150
• Description: Side feeder lift motor going down error (optional side feeder) • Lower 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 lower limit detection switch connector terminals. Defective side feeder main PWB. Defective side feeder lift motor.
• Remedy: Poor contact of lower 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.

• Code: C1200
• Description: Duplex side registration motor error • The duplex side registration home position sensor does not detect the home position of the side registration guide.
• Causes: Defective duplex side registration home position sensor. Defective duplex side registration motor. Defective duplex PWB.
• Remedy: Defective duplex side registration home position sensor. Check the connection of connector YC29 on the engine PWB and the connector YC1 on the duplex PWB. Repair or replace if necessary. Defective duplex side registration motor. Replace the duplex side registration motor. Defective duplex PWB. Replace the duplex PWB.

• Code: C2100
• Description: Developing motor error • LOCK signal remains high for 1 s, 1 s after the developing motor has turned on.
• Causes: Poor contact in the developing motor connector terminals. Defective developing motor rotation control circuit. Defective drive transmission system.Defective duplex PWB.
• Remedy: Poor contact in the developing motor connector terminals. Reinsert the connector. Also check for continuity within the connector cable. If none, remedy or replace the cable. Defective developing motor rotation control circuit. Replace the developing motor. 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 duplex PWB. Replace the duplex PWB.

• Code: C2200
• Description: Drive motor error • LOCK signal remains high for 1 s, 1 s after the drive motor has turned on.
• Causes: Poor contact in the drive motor connector terminals. Defective drive motor rotation control circuit. Defective drive transmission system. Defective deck PWB or engine PWB.
• Remedy: Poor contact in the drive motor connector terminals. Check the connection of connector YC2 and YC11 on the deck PWB. Reinsert the connector. Also check for continuity within the connector cable. If none, remedy or replace the cable. Defective drive motor rotation control circuit. Replace the drive motor. 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 deck PWB or engine PWB. Replace the deck PWB or the engine PWB.

• Code: C2300
• Description: Fuser motor error • LOCK signal remains high for 1 s, 1 s after the fuser motor has turned on.
• Causes: Poor contact in the fuser motor connector terminals. Defective fuser motor rotation control circuit. Defective drive transmission system. Defective duplex PWB or engine PWB.
• Remedy: Poor contact in the fuser motor connector terminals. Check the connection of connector YC2 and YC4 on the duplex PWB. Reinsert the connector. Also check for continuity within the connector cable. If none, remedy or replace the cable. Defective fuser motor rotation control circuit. Replace the fuser motor. 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 duplex PWB or engine PWB. Replace the duplex PWB or the engine PWB.

• Code: C2550
• Description: Transfer motor error • LOCK signal remains high for 1 s, 1 s after the transfer motor has turned on.
• Causes: Poor contact in the transfer motor connector terminals. Defective transfer motor rotation control circuit. Defective drive transmission system. Defective cassette PWB or engine PWB.
• Remedy: Poor contact in the transfer motor connector terminals. Check the connection of connector YC2 and YC3 on the cassette PWB and YC4 on the engine PWB. Reinsert the connector. Also check for continuity within the connector cable. If none, remedy or replace the cable. Defective transfer motor rotation control circuit. Replace the transfer motor. 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 cassette PWB or engine PWB. Replace the cassette PWB or the engine PWB.

• Code: C2640
• Description: Side feeder drive motor error
• Causes: Overloaded side feeder drive motor Defective side feeder drive motor. Defective side feeder main PWB.
• Remedy: Overloaded side feeder drive motor Verify that the side feeder motor or the paper feeding mechanism is not interrupted by any objects. Defective side feeder drive motor. Replace the side feeder drive motor. Defective side feeder main PWB. Replace the side feeder main PWB.

• Code: C3100
• Description: Scanner carriage problem • The home position is not correct when the power is turned on or at the start of copying using the MP tray.
• Causes: Defective scanner PWB. Defective scanner home position switch. Defective scanner motor. Poor contact in the connector terminals. Defective mirror flame, exposure lamp or scanner wire.
• Remedy: Defective scanner PWB. Replace the scanner PWB and check for correct operation. Defective scanner home position switch. Replace the scanner home position switch. Defective scanner motor. Replace the scanner motor. Poor contact in the connector terminals. Check the connection of connector YC2, YC5 and YC10 on the scanner PWB and the continuity across the connector terminals. Repair or replace if necessary. Defective mirror flame, exposure lamp or scanner wire. Check if the mirror flames and exposure lamp are on the rail. And check the scanner wire winds correctly.