• Code: C0870
• Description: Fax control PWB to main PWB high capacity data transfer problem (optional fax) High-capacity data transfer between the fax control PWB and the main PWB was not normally performed even if the data transfer was retried the specified times.
• Causes: Poor contact in the connector terminals. Defective fax control PWB or main PWB.
• Remedy: Poor contact in the connector terminals. Check the connection of connector YC1 on the fax control PWB and YC4 on the interface PWB, connection of connector YC30 on the main PWB and YC6 on the interface PWB and the continuity across the connector terminals. Repair or replace if necessary. Defective fax control PWB or main PWB. Replace the fax control PWB or main PWB and check for correct operation.

• Code: C0880
• Description: Fax control PWB program archive problem (optional fax) When power is turned on, the compressed program in the flash ROM on the fax control PWB was not successfully decompressed.
• Causes: Defective fax control PWB.
• Remedy: Defective fax control PWB. Replace the fax control PWB and check for correct operation.

• Code: C0920
• Description: Fax file system error (optional fax) The backup data is not retained for file system abnormality of flash memory of the fax control PWB.
• Causes: Defective fax control PWB.
• Remedy: Defective fax control PWB. Turn the main power switch off and then back on again. If the problem still remains, replace the fax control PWB and verify the operation.

• Code: C1010
• Description: Upper lift motor error When cassette 1 is inserted, upper lift limit switch does not turn on within 12 s of upper lift motor turning on. A motor over-current signal is detected continuously for 500 ms or longer.
• Causes: Poor contact in the connector terminals. Broken gears or couplings of upper lift motor. Defective upper lift motor. Defective upper lift limit switch. Poor contact in the connector terminals. Defective engine PWB.
• Remedy: Poor contact in the connector terminals. Check the connection of connector of upper lift motor and the connector YC13 on the engine PWB, and the continuity across the connector terminals. Repair or replace if necessary. Broken gears or couplings of upper lift motor. Replace upper lift motor. Defective upper lift motor. Check for continuity across the coil. If none, replace upper lift motor. Defective upper lift limit switch. Check if YC13-B9 on the engine PWB goes low when upper lift limit switch is turned off. If not, replace upper lift limit switch. Poor contact in the connector terminals. Check the connection of connector of upper lift limit switch and the connector YC13 on the engine 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.

• Code: C1020
• Description: Lower lift motor error When cassette 2 is inserted, lower lift limit switch does not turn on within 12 s of lower lift motor turning on. A motor over-current signal is detected continuously for 500 ms or longer.
• Causes: Poor contact in the connector terminals. Broken gears or couplings of lower lift motor. Defective lower lift motor. Defective lower lift limit switch. Poor contact in the connector terminals. Defective engine PWB.
• Remedy: Poor contact in the connector terminals. Check the connection of connector of lower lift motor and the connector YC13 on the engine PWB, and the continuity across the connector terminals. Repair or replace if necessary. Broken gears or couplings of lower lift motor. Replace lower lift motor. Defective lower lift motor. Check for continuity across the coil. If none, replace lower lift motor. Defective lower lift limit switch. Check if YC13-B15 on the engine PWB goes low when lower lift limit switch is turned off. If not, replace lower lift limit switch. Poor contact in the connector terminals. Check the connection of connector of lower lift limit switch and the connector YC13 on the engine 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.

• Code: C1030
• Description: Paper feeder lift motor 1 error (optional paper feeder) When optional cassette 3 is inserted, paper feeder lift switch 1 does not turn on within 12 s of paper feeder lift motor 1 turning on.
• Causes: Poor contact in the connector terminals. Broken gears or couplings of paper feeder lift motor 1. Defective paper feeder lift motor 1. Defective paper feeder lift switch 1.
• Remedy: Poor contact in the connector terminals. Check the connection of connector on the engine PWB and the connector on the paper feeder main PWB, and the continuity across the connector terminals. Repair or replace if necessary. Broken gears or couplings of paper feeder lift motor 1. Replace paper feeder lift motor 1. Defective paper feeder lift motor 1. Check for continuity across the coil. If none, replace paper feeder lift motor 1. Defective paper feeder lift switch 1. Check if YC1-5 on the paper feeder main PWB goes low when paper feeder lift switch 1 is turned off. If not, replace paper feeder lift switch 1.

• Code: C1040
• Description: Paper feeder lift motor 2 error (optional paper feeder) When optional cassette 4 is inserted, paper feeder lift switch 2 does not turn on within 12 s of paper feeder lift motor 2 turning on.
• Causes: Poor contact in the connector terminals. Broken gears or couplings of paper feeder lift motor 2. Defective paper feeder lift motor 2. Defective paper feeder lift switch 2.
• Remedy: Poor contact in the connector terminals. Check the connection of connector on the engine PWB and the connector on the paper feeder main PWB, and the continuity across the connector terminals. Repair or replace if necessary. Broken gears or couplings of paper feeder lift motor 2. Replace paper feeder lift motor 2. Defective paper feeder lift motor 2. Check for continuity across the coil. If none, replace paper feeder lift motor 2. Defective paper feeder lift switch 2. Check if YC1-7 on the paper feeder main PWB goes low when paper feeder lift switch 2 is turned off. If not, replace paper feeder lift switch 2.

• Code: C1100
• Description: Paper feeder lift motor 1 error (optional 3000-sheet paper feeder) A motor overcurrent signal is detected continuously for 1 s or longer.
• Causes: Poor contact in the connector terminals. Paper feeder lift motor 1 does not rotate correctly (the motor is overloaded).
• Remedy: Poor contact in the connector terminals. Check the connection of connector on the engine PWB and the connector on the paper feeder main PWB, and the continuity across the connector terminals. Repair or replace if necessary. Paper feeder lift motor 1 does not rotate correctly (the motor is overloaded). Check the gears and remedy if necessary.