Description: Fuser IH PWB communication error No response is received in 30 ms since a command is sent to IHCPU. A checksum error is detected 10 times in succession.
Causes: Defective connector cable or poor contact in the connector. Defective fuser IH PWB. Defective engine PWB.
Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Fuser IH PWB (YC4) and engine PWB (YC26) Defective fuser IH PWB. Replace the fuser IH PWB and check for correct operation. Defective engine PWB. Replace the engine PWB and check for correct operation.
Code: 6990
Description: Fuser power supply incompatibility Information won’t match between the engine backup and the fuser IH PWB.
Causes: Defective fuser IH PWB. Defective engine PWB.
Remedy: Defective fuser IH PWB. Replace the fuser IH PWB and check for correct operation. Defective engine PWB. Replace the engine PWB and check for correct operation.
Code: 7001
Description: Toner motor error During the toner motor is driven, an event in which a locking was detected for 5 times in 200 ms intervals has occurred in 30 sets.
Causes: Defective connector cable or poor contact in the connector. Defective toner motor. Defective engine PWB.
Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Toner motor and engine PWB (YC27) Defective toner motor. Replace the toner motor. Defective engine PWB. Replace the engine PWB and check for correct operation.
Code: 7101
Description: Toner sensor error Sensor output value of 60 or less or 944 or more continued for 3 s.
Causes: Defective connector cable or poor contact in the connector. Defective toner sensor. Defective engine PWB.
Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Toner sensor and front PWB (YC7) Front PWB (YC2) and engine PWB (YC8) Defective toner sensor. Replace developer unit. Defective engine PWB. Replace the engine PWB and check for correct operation.
Code: 7200
Description: Broken outer temperature sensor wire The sensor input sampling is greater than 230.
Causes: Defective connector cable or poor contact in the connector. Defective outer temperature sensor. Defective engine PWB.
Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Outer temperature sensor and front PWB (YC8) Front PWB (YC2) and engine PWB (YC8) Defective outer temperature sensor. Replace outer temperature sensor. Defective engine PWB. Replace the engine PWB and check for correct operation.
Code: 7210
Description: Short-circuited outer temperature sensor The sensor input sampling is less than 69.
Causes: Defective connector cable or poor contact in the connector. Defective outer temperature sensor. Defective engine PWB.
Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Outer temperature sensor 2 and front PWB (YC8) Front PWB (YC2) and engine PWB (YC8) Defective outer temperature sensor. Replace outer temperature sensor. Defective engine PWB. Replace the engine PWB and check for correct operation.