Analyze maintenance: according to the fault code, check from the following aspects: (1) whether the high voltage power supply power supply part 2 leakage; (2) separation of corona is smudgy and leakage; (3) YES main motor joint presence of short circuit or damage. 4mgservice manual download site
 4mgservice manual download site
But after checked no exception for some of these parts. Try using high voltage power supply with dryer for after 2 clean with alcohol, packed commissioning, fault code becomes a E3-10. 4mgservice manual download site
 4mgservice manual download site
Then according to the E3-10 code, check from the following aspects: (1) the high voltage power supply 1 if there is leakage; (2) the toner bottle position sensor detection and carbon powder bottle machine is normal. High pressure 1 landed first installed testing-run after cleaning, dry, fault is still there. Now notice other parts have obvious damp phenomenon, analysis may be open all night air conditioning because of the hot weather, and there is a window, hot and humid air cooled after into from the window, make indoor appliance produces condensation, fear of wet copier is suffering. As it exists serious condensation large area, with general blower platoon is wet, I'm afraid the effect is not ideal, and make use of uniform temperature, heating regulation of small wall-mounted heaters (two heating tubes, each only lamp of 900 w) to the platoon is wet. Aim the heater outlet copier internal heating way to wet, gradually close heater, after about 15 minutes after being copier temperature drop, adjusted the developer and drum rack on the copy, no longer shows fault code, testing-run clear image, stable operation, troubleshooting.4mgservice manual download site