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CHAPTER 13 TROUBLESHOOTING
Code
E071
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Cause The side A sensor (PS2) is faulty. The side B sensor (PS3) is faulty. The C sensor (PS4) is faulty. The signal plate is faulty. The drum motor drive system is subjected to an overload. The transfer drum locking mechanism is faulty. The DC driver PCB is faulty. The CPU PCB is faulty.
1002
1003
1004
1005
1006
1007
1008
Timing of detection The rising edge signal of the signal plate to be detected by the side B sensor is not generated after the rising edge signal of the signal plate C detected by the C sensor has been generated. The rising edge signal of the signal plate C to be detected by the C sensor is not generated after the falling edge of the signal plate detected by the side B sensor has been generated. The falling edge signal of the signal plate C to be detected by the C sensor is not detected after the rising edge of the signal plate detected by the side B sensor has been generated. The rising edge signal of the signal plate to be detected by the side A sensor is not generated after the falling edge of the signal plate C detected by the C sensor has been generated. The falling edge signal of the signal plate to be detected by the side A sensor is not generated after the rising edge of the signal plate D detected by the C sensor has been generated. The rising edge signal of the signal plate D to be detected by the C sensor is not generated after the rising edge signal of the signal plate detected by the side A sensor has been generated. The rising edge signal of the signal plate D to be detected by the C sensor is not generated after the falling edge signal of the signal plate detected by the side A sensor has been generated.
