Description: Short-circuited external temperature thermistor • The input voltage is 4.5 V or more.
Causes: Poor contact in the humidity sensor connector terminals. Defective humidity sensor.
Remedy: Reinsert the connector. Also check for continuity within the connector cable. If none, remedy or replace the cable. Replace the drawer PCB and check for correct operation.
Code: C8170
Description: Finisher front side registration motor problem • If the front side registration home position sensor is on in initialization, the sensor does not turn off within 570 ms of starting initialization. • If the front side registration home position sensor is off in initialization, the sensor does not turn on within 3180 ms of starting initialization.
Causes: The front side registration motor connector makes poor contact. The front side registration motor malfunctions. The front side registration home position sensor connector makes poor contact. The front side registration home position sensor malfunctions. Defective finisher main PCB.
Remedy: Reinsert the connector. Also check for continuity within the connector cable. If none, remedy or replace the cable. Replace the front side registration motor and check for correct operation. Reinsert the connector. Also check for continuity within the connector cable. If none, remedy or replace the cable. Replace the front side registration home position sensor and check for correct operation. Replace the finisher main PCB and check for correct operation.
Code: C8170
Description: Finisher trailing edge registration motor problem • If the trailing edge registration home position sensor is on in initialization, the sensor does not turn off within 570 ms of starting initialization. • If the trailing edge registration home position sensor is off in initialization, the sensor does not turn on within 4550 ms of starting initialization.
Causes: The trailing edge registration motor connector makes poor contact. The trailing edge registration motor malfunctions. The trailing edge registration home position sensor connector makes poor contact. The trailing edge registration home position sensor malfunctions. Defective finisher main PCB.
Remedy: Reinsert the connector. Also check for continuity within the connector cable. If none, remedy or replace the cable. Replace the trailing edge registration motor and check for correct operation. Reinsert the connector. Also check for continuity within the connector cable. If none, remedy or replace the cable. Replace the trailing edge registration home position sensor and check for correct operation. Replace the finisher main PCB and check for correct operation.
Code: C8180
Description: Finisher rear side registration motor problem • If the rear side registration home position sensor is on in initialization, the sensor does not turn off within 570 ms of starting initialization. • If the rear side registration home position sensor is off in initialization, the sensor does not turn on within 2880 ms of starting initialization.
Causes: The rear side registration motor connector makes poor contact. The rear side registration motor malfunctions. The rear side registration home position sensor connector makes poor contact. The rear side registrationhom position sensor malfunctions. Defective finisher main PCB.
Remedy: Reinsert the connector. Also check for continuity within the connector cable. If none, remedy or replace the cable. Replace the rear side registration motor and check for correct operation. Reinsert the connector. Also check for continuity within the connector cable. If none, remedy or replace the cable. Replace the rear side registration home position sensor and check for correct operation. Replace the finisher main PCB and check for correct operation.
Code: C8180
Description: Finisher front stapler problem • The front stapler home position sensor does not change state from nondetection to detection within 200 ms of the start of front stapler motor counterclockwise (forward) rotation. • During initialization, the front stapler home position sensor does not change state from non-detection to detection within 600 ms of the start of front stapler motor clockwise (reverse) rotation.
Causes: The front stapler connector makes poor contact. The front stapler malfunctions. a) The front stapler is blocked with a staple. b) The front stapler is broken. Defective finisher main PCB.
Remedy: Reinsert the connector. Also check for continuity within the connector cable. If none, remedy or replace the cable. a) Remove the front stapler cartridge, and check the cartridge and the stapling section of the stapler. b) Replace the front stapler and check for correct operation. Replace the finisher main PCB and check for correct operation.