Description: Feed roller home position error. During power-on, the feed roller HP sensor could not detect that the reference of Scale that exists on encoder film area color change from transparent to black.
Causes: Feed roller encoder film, feed roller HP sensor, feed motor, or main controller PCB
Remedy: 1. Visual check If the feed roller encoder film is damaged, replace it. Remove foreign substances from the feed roller encoder film if any. 2. Feed roller HP sensor Select [SERVICE MODE]>[I/O DISPLAY] to check for normal operation. If the operation is abnormal, replace the feed roller HP sensor. 3. Cable continuity check If continuity of the cable between the feed roller HP sensor, feed motor and the main controller PCB is abnormal, replace the cable. 4. Replace the feed motor. 5. Replace the main controller PCB.