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6-22
Trouble
Action to be taken
(3) Light
At the scanner
Check the following components:
- CIS unit
- Main PCB
At the printer side
Replace the toner cartridge with a new one and print 4 to 5 pages.
If the problem persists, proceed to the next step.
Remove the toner cartridge and start printing. If printing takes
place, clean the toner sensors (LED and light-receiver), check the
sensor harnesses, and then replace the toner sensor PCBs.
Clean the high-voltage contacts for the transfer roller on the drum
unit, main cover, and high-voltage power supply PCB. (Contacts
in the illustration given on page 6-28)
Clean the high-voltage contacts for the developer roller on the
drum unit, main cover, and high-voltage power supply PCB.
(Contacts in the illustration given on page 6-28)
Clean the grounding contacts on the drum unit, gear drive unit,
and main cover. (Contacts and in the illustration given on
page 6-28)
Check the connection of the high-voltage power flat cable on the
main PCB and high-voltage power supply PCB.
Replace the drum unit.
Replace the high-voltage power supply PCB.
Replace the main PCB.
Replace the laser unit.
(4) Dark
At the scanner
Check the following components:
- CIS unit
- Main PCB
At the printer side
Slide the wire cleaner to clean the corona wire inside the drum
unit.
Clean the high-voltage contacts for the grid and charger on the
drum unit, main cover, and high-voltage power supply PCB.
(Contacts and in the illustration given on page 6-28)
Replace the toner cartridge.
Replace the drum unit.
Replace the high-voltage power supply PCB.
Replace the main PCB.
Содержание Laser MFC-4800
Страница 1: ...FACSIMILE EQUIPMENT SERVICE MANUAL MODEL FAX2800 FAX2900 FAX3800 MFC4800 FAX8070P MFC9030 MFC9070 ...
Страница 5: ...CHAPTER 1 GENERAL DESCRIPTION ...
Страница 16: ...CHAPTER 2 INSTALLATION ...
Страница 21: ...CHAPTER 3 THEORY OF OPERATION ...
Страница 23: ...3 1 3 1 OVERVIEW ...
Страница 26: ...3 4 3 2 2 Laser Printing Mechanism 3 2 2 1 Paper pulling in registration feeding and ejecting mechanism ...
Страница 31: ...3 9 Location of Sensors and Actuators ...
Страница 33: ...CHAPTER 4 DISASSEMBLY REASSEMBLY AND LUBRICATION ...
Страница 39: ...4 4 Disassembly Order Flow ...
Страница 44: ...4 9 6 Turn the ASF upside down then remove the registration sensor actuator ...
Страница 82: ...4 45 Harness routing G Laser diode harness polygon motor flat cable and toner sensor harness on the laser unit ...
Страница 86: ...4 48 2 Scanner drive unit 3 Separation roller ...
Страница 87: ...4 49 4 Document feed roller ...
Страница 88: ...CHAPTER 5 MAINTENANCE MODE ...
Страница 95: ...5 6 Scanning Compensation Data List a b c d e ...
Страница 102: ...5 13 Key Button Entry Order ...
Страница 110: ...CHAPTER 6 ERROR INDICATION AND TROUBLESHOOTING ...
Страница 140: ...FAX2800 FAX2900 FAX3800 MFC4800 FAX8070P MFC9030 MFC9070 Appendix 1 EEPROM Customizing Codes ...
Страница 143: ...FAX2800 FAX2900 FAX3800 MFC4800 FAX8070P MFC9030 MFC9070 Appendix 2 Firmware Switches WSW ...
Страница 190: ...A Main PCB 1 5 ...
Страница 191: ...A Main PCB 2 5 ...
Страница 192: ...A Main PCB 3 5 ...
Страница 193: ...A Main PCB 4 5 ...
Страница 194: ...A Main PCB 5 5 ...
Страница 195: ...B NCU PCB U S A Canada ...
Страница 196: ...B NCU PCB U K Norway Netherlands Finland Denmark Sweden ...
Страница 197: ...B NCU PCB Germany France Belgium Switzerland Ireland Austria Spain Italy South Africa ...
Страница 198: ...B NCU PCB Asia Oceania 1 2 ...
Страница 200: ...C Control Panel PCB ...
Страница 201: ...D Power Supply PCB 100 120V Low voltage power supply ...
Страница 202: ...D Power Supply PCB 200 240V Low voltage power supply Europe ...
Страница 203: ...D Power Supply PCB 200 240V Low voltage power supply Asia Oceania ...
Страница 204: ...D Power Supply PCB High voltage power supply ...
Страница 205: ...April 02 SM FAX002 8X5601 Printed in Japan ...