• Code: 6930
• Description: Fuser rear fan motor error When the fuser rear fan motor is driven, alarm signal is detected for 5 s continuously.
• Remedy: Fuser rear fan motor 1. To check the fan motor operation, execute U037 Fuser Cooling. 2. Confirm that the wiring connector is firmly connected and, if necessary, connect the connector all the way in. Fuser rear fan motor and Engine PWB (YC26) 3. If the wiring is disconnected, shorted or grounded, replace the wiring. 4. Replace the fuser rear fan motor.
  Engine PWB 1. Check the engine software and upgrade to the latest, if necessary. 2. Replace the engine PWB.

• Code: 6940
• Description: IH PWB cooling fan motor error When the IH fan motor is driven, the alarm signal is detected for 5 s continuously.
• Remedy: IH fan motor 1. To check the fan motor operation, execute U037 IH PWB. 2. Confirm that the wiring connector is firmly connected and, if necessary, connect the connector all the way in. IH fan motor and Feed PWB 1(YC11) Feed PWB 1(YC2) and Engine PWB (YC5) 3. If the wiring is disconnected, shorted or grounded, replace the wiring. 4. Replace the IH fan motor.
  Feed PWB 1 Replace the Feed PWB1.
  Engine PWB 1. Check the engine software and upgrade to the latest, if necessary. 2. Replace the engine PWB.

• Code: 6950
• 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.
• Remedy: Power source PWB 1. Confirm that the wiring connector is firmly connected and, if necessary, connect the connector all the way in. Power source PWB (YC9) and Feed PWB 1(YC4) Power source PWB (YC3) and Fuser IH PWB (YC1) 2. If the wiring is disconnected, shorted or grounded, replace the wiring. 3. If the +24V output is not given by the power source PWB (YC9), replace the power source PWB.
  Feed PWB 1 1. Confirm that the wiring connector is firmly connected and, if necessary, connect the connector all the way in. Power source PWB (YC3) and Fuser IH PWB (YC1) 2. If the wiring is disconnected, shorted or grounded, replace the wiring. 3. If the +24V output is not given by the feed PWB1 (YC27), replace the feed PWB1.
  Fuser IH PWB 1. Confirm that the wiring connector is firmly connected and, if necessary, connect the connector all the way in. Fuser IH PWB(YC4) and Engine PWB (YC26) 2. If the wiring is disconnected, shorted or grounded, replace the wiring. 3. Replace the Fuser IH PWB.
  Engine PWB 1. Check the engine software and upgrade to the latest, if necessary. 2. Replace the engine PWB.

• Code: 6960
• Description: Current PWB error The power current is greater than 1A for 5 seconds continuously despite that 500W was indicated as the fuser power during power-up.
• Remedy: Current PWB 1. Confirm that the wiring connector is firmly connected and, if necessary, connect the connector all the way in. Current PWB(YC17) and Feed PWB2 (YC13) 2. If the wiring is disconnected, shorted or grounded, replace the wiring. 3. Replace the Current PWB.

• Code: 6990
• Description: Fuser power supply incompatibility Information won’t match between the engine backup and the fuser IH PWB.
• Remedy: Differences in settings after initialization When this has happened after initialization using U021, make settings identical with the voltages on the IH PWB using U169.
  Fuser IH PWB Replace with a fuser IH PWB specifically designed with the standard voltage.
  Engine PWB 1. Check the engine software and upgrade to the latest, if necessary. 2. Replace the engine PWB.

• Code: 7001
• Description: Toner motor K 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.
• Remedy: Toner container K 1. Check that the spiral screw of the toner container can be rotated by the hand. 2. Check for broken gears and replace if any.
  Toner motor K 1. Draw out the toner container and execute U135 to check the toner motor operation. 2. Check the drive gear can rotate or they are not unusually loaded and, if necessary, replace. 3. Confirm that the wiring connector is firmly connected and, if necessary, connect the connector all the way in. Toner motor K and Engine PWB (YC27) 4. If the wiring is disconnected, shorted or grounded, replace the wiring. 5. Replace the Toner motor K.
  Screw sensor K 1. Check that the sensor is correctly positioned. 2. Confirm that the wiring connector is firmly connected and, if necessary, connect the connector all the way in. Screw sensor K and Engine PWB (YC27) 3. Replace the screw sensor K.
  Engine PWB 1. Check the engine software and upgrade to the latest, if necessary. 2. Replace the engine PWB.

• Code: 7002
• Description: Toner motor C 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.
• Remedy: Toner container C 1. Check that the spiral screw of the toner container can be rotated by the hand. 2. Check for broken gears and replace if any.
  Toner motor C 1. Draw out the toner container and execute U135 to check the toner motor operation. 2. Check the drive gear can rotate or they are not unusually loaded and, if necessary, replace. 3. Confirm that the wiring connector is firmly connected and, if necessary, connect the connector all the way in. Toner motor C and Engine PWB (YC27) 4. If the wiring is disconnected, shorted or grounded, replace the wiring. 5. Replace the Toner motor C.
  Screw sensor C 1. Check that the sensor is correctly positioned. 2. Confirm that the wiring connector is firmly connected and, if necessary, connect the connector all the way in. Screw sensor C and Engine PWB (YC27) 3. Replace the screw sensor C.
  Engine PWB 1. Check the engine software and upgrade to the latest, if necessary. 2. Replace the engine PWB.

• Code: 7003
• Description: Toner motor M 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.
• Remedy: Toner container M 1. Check that the spiral screw of the toner container can be rotated by the hand. 2. Check for broken gears and replace if any.
  Toner motor M 1. Draw out the toner container and execute U135 to check the toner motor operation. 2. Check the drive gear can rotate or they are not unusually loaded and, if necessary, replace. 3. Confirm that the wiring connector is firmly connected and, if necessary, connect the connector all the way in. Toner motor M and Engine PWB (YC27) 4. If the wiring is disconnected, shorted or grounded, replace the wiring. 5. Replace the Toner motor M.
  Screw sensor M 1. Check that the sensor is correctly positioned. 2. Confirm that the wiring connector is firmly connected and, if necessary, connect the connector all the way in. Screw sensor M and Engine PWB (YC27) 3. Replace the screw sensor M.
  Engine PWB 1. Check the engine software and upgrade to the latest, if necessary. 2. Replace the engine PWB.