• Code: 8800
• Description: Document Finisher Main program error In case there is abnormality in the main program when turning the power on.
• Remedy: DF main PWB 1. Confirm that the wiring connector is firmly connected, and if necessary, connect the connector all the way in. DF main PWB - Engine PWB(YC24): 30 ppm model - Engine PWB(YC31): 35/40 ppm models 2. If the wiring is disconnected, short-circuited or has a ground fault, replace the wire. 3. Replace the DF main PWB.
  Engine PWB 1. Check the engine firmware and upgrade to the latest version if necessary. 2. Replace the engine PWB.

• Code: 8900
• Description: Document finisher backup error Mismatch between writing data and reading data occurs 3 times successively.
• Remedy: DF main PWB 1. Confirm that the wiring connector is firmly connected, and if necessary, connect the connector all the way in. DF main PWB - Engine PWB(YC24): 30 ppm model - Engine PWB(YC31): 35/40 ppm models 2. If the wiring is disconnected, short-circuited or has a ground fault, replace the wire. 3. Replace the DF main PWB.
  Engine PWB 1. Check the engine firmware and upgrade to the latest version if necessary. 2. Replace the engine PWB. (see page P.4-200,P.4-204

• Code: 8990
• Description: Finisher setup error In case the bridge (AK) is not installed while the DF is connected. (35/40 ppm model only)
• Remedy: Finisher 1. Confirm that the wiring connector is firmly connected, and if necessary, connect the connector all the way in. DF main PWB - Engine PWB(YC24): 30 ppm model - Engine PWB(YC31): 35/40 ppm models 2. If the wiring is disconnected, short-circuited or has a ground fault, replace the wire.
  DF main PWB 1. Check EEPROM mount and correct it. 2. Replace the DF main PWB.

• Code: 9070
• Description: Communication error between the DP and SHD A communication error is detected. (35/40 ppm model only)
• Remedy: DPSHD PWB 1. Execute the U906 Resetting the partial operation. 2. Confirm that the wiring connector is firmly connected, and if necessary, connect the connector all the way in. DPSHD PWB - DP main PWB 3. If the wiring is disconnected, short-circuited or has a ground fault, replace the wire. 4. Replace the DPSHD PWB.

• Code: 9180
• Description: DP feed-shift motor error The HP cannot be detected even after executing the HP detection retrial 3 consecutive times. HP detection: when the DP feed-shift motor is driven to move to the HP, the HP is not detected after it is rotated once.
• Remedy: DP feed-shift motor 1. Unplug the power cord from the wall outlet, and wait five seconds. Then plug in the power cord and then turn on the power switch. 2. Confirm that the connector of the DP feed-shift motor is firmly connected, and if necessary, push the unit all the way in. 3. Confirm that the wiring connector is firmly connected, and if necessary, connect the connector all the way in. DP feed-shift motor - Engine PWB (YC6) 4. If the wire is disconnected, short-circuited or has a ground fault, or the connector pin is deformed, replace the wire. 5. Replace the DF feed-shift motor.
  DP feed-shift sensor 1. Rotate the DP feed-shift motor manually to check that it is not unusually difficult to rotate. 2. Check if the DP feed-shift sensor is out of position because it has dropped off and if the sensor light is interrupted by the actuator. 3. Confirm that the wiring connector is firmly connected, and if necessary, connect the connector all the way in. DP feed-shift sensor - DP main PWB (YC4) DP main PWB - Engine PWB (YC6) 4. If the wiring is disconnected, short-circuited or has a ground fault, replace the wire. 5. Replace the DP feed-shift sensor.
  Engine PWB 1. Check the engine firmware and upgrade to the latest version if necessary. 2. Replace the engine PWB.

• Code: 9500
• Description: IPU PWB error A (35/40 ppm model only)
• Remedy: Main PWB DPIF PWB 1. Reconnect the connector if its connection is loose. Main PWB (YC4) - DPIF PWB (YC10) 2. Replace the main PWB. 3. Replace the DPIF PWB. 4. Please contact your service support department.

• Code: 9510
• Description: IPU PWB error B (35/40 ppm model only)
• Remedy: Main PWB DPSHD PWB 1. Reconnect the connector if its connection is loose. DPIF PWB - DPSHD PWB (YC4) 2. Replace the main PWB. 3. Replace the DPSHD PWB. 4. Please contact your service support department.

• Code: 9530, 9540, 9550
• Description: Backup data error The internal data changes by replacing multiple parts at the same time, interfering with the machine operation and will not enter ready mode.
• Remedy: PWBs In case two or more of the parts below were replaced at the same time, reattach them. Applicable parts: Memory, PWBs *When replacing the applicable parts, 2 or more do not replace then at the same time. *When replacing the above applicable parts, do not work the following at the same time. Replace the drum unit or the developing unit. Replace the drum unit for one color with another in the same machine.