Brother International DCP 8040 Service Manual - Page 254
Horizontal lines, Light rain
UPC - 012502610328
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I-21 Horizontal lines MFC-8440/8840D/8840DN, DCP-8040/8045D/8045DN SERVICE MANUAL Possible cause Paper tray contacts Step Check Result Remedy 1 Are the ground contacts on the No Clean the contacts. back of the paper tray connecting correctly? Ground contacts (7) I-22 Light rain Possible cause Step Check Drum unit failure 1 Is the problem solved after replacing the drum unit? Drum connection failure 2 Is the contact between the drum unit and machine connected correctly? High-voltage power supply PCB failure 3 Is the problem solved after replacing the high-voltage power supply PCB? Result Remedy Yes Replace the drum unit. No Clean contact electrode both on the drum unit and in the machine. Yes Replace the highvoltage power supply PCB. Ground contact (8) 6-51