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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.
1101
1102
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Side A sensor (PS2) is faulty. 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 is not locked properly. � The DC driver PCB is faulty. � The CPU PCB is faulty.
1103
1104
1105
1106
1107
Timing of detection The falling edge signal of the signal plate to be detected by the side B sensor is generated 10 ms earlier after the falling edge signal of the signal plate D detected by the C sensor has been generated. The rising edge signal of the signal plate to be detected by the side B sensor is generated 10 ms earlier 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 generated 10 ms earlier after the falling edge signal 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 generated 10 ms earlier after the rising edge signal of the signal plate detected by the side B sensor has been generated. The rising edge of the signal plate to be detected by the side A sensor is generated 10 ms earlier after the falling edge signal 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 generated 10 ms earlier after the rising edge signal 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 generated 10 ms earlier after the rising edge of the signal l plate to be detected by the side A sensor has been generated.
