Code :

Code: U6-69
Description: Manual feed tray lift trouble
The upper limit is not detected within the specified time (10sec) when lifting up.
Causes: Upper limit sensor trouble. Tray lift motor lock. Connection trouble of the connector and the harness. PWB trouble.
Remedy: Use SIM04-02 and SIM04-03 to check the operations of the upper limit sensor and lift operations. Wiring check. Fix the trouble, and use SIM15 to cancel the trouble.

Code: U6-73
Description: LCT4 reverse winding detection trouble
It is detected that the wire of the tray is reversely wound.
Causes: Reverse winding detection SW ON The wire is reversely wound. Reverse winding detection SW trouble Connection trouble of the connector and the harness A3 2-stage LCT control PWB trouble
Remedy: Check the wire. Replace the reverse winding SW. Check connection of the connector and the harness. Replace the A3 2-stage LCT control PWB.

Code: U6-74
Description: LCT4 lock detection trouble
It is detected that the tray lock mechanism malfunctions
Causes: Tray lock mechanism breakdown Connection trouble of the connector and the harness Tray lock sensor trouble A3 2-stage LCT control PWB trouble
Remedy: Check the tray lock mechanism. Check connection of the connector and the harness. Replace the tray lock sensor. Replace the A3 2-stage LCT control PWB.

Code: U6-79
Description: LCT4 lift motor trouble
The upper limit is not detected within the specified time when lifting. The upper limit SW ON is detected when lifting. The encoder signal does not vary when lifting.
Causes: Sensor trouble, upper limit SW trouble, A3 2-stage LCT control PWB trouble, broken gear, lift motor trouble
Remedy: Use SIM04-02 and SIM04-03 to check the operation of the upper limit sensor, the upper limit SW, the encoder sensor, and the lift motor. Fix the trouble, and use SIM15 to cancel the trouble.

Code: U6-80
Description: Intermediate unit transport motor trouble
Causes: Motor lock Motor RPM abnormality Overcurrent to the motor LCC control PWB trouble / A3 2-stage LCT control PWB trouble
Remedy: Use SIM04-03 to check the operation of the Intermediate unit transport motor. Replace the motor Replace the LCC / A3 2-stage LCT control PWB.

Code: U6-81
Description: Power unit cooling fan motor trouble (1 series)
A3 2-stage LCT power unit section cooling fan motor abnormality
Causes: Motor lock, motor harness short/open, A3 2-stage LCT control PWB trouble, harness and connector connection trouble
Remedy: Check connection from the A3 2-stage LCT control PWB to the motor. Replace the A3 2-stage LCT control PWB. Replace the motor.

Code: U6-83
Description: Room temperature thermistor breakdown (1 series)
Room temperature thermistor open or short
Causes: Room temperature thermistor harness connection trouble Room temperature thermistor trouble A3 2-stage LCT control PWB trouble
Remedy: Check connection of the harness and the connector of the room temperature thermistor. Replace the temperature and humidity sensor. Check the A3 2-stage LCT control PWB.