
CHAPTER 6 TROUBLESHOOTING
6-32
8.3
Troubleshooting Image Defect
Several types of the image defects can be cleared by end users. For those defects, instruct
the user to check the ‘User Check’ items described in each table. Even if the same image
defect appears, the following procedures should be followed in the event of specific image
defects.
See also
subsection 8.4 ‘Location of Ground Contacts’
for information about the
location of the grounding contacts.
!
CAUTION:
When using the machine for a special job, such as printing of name cards, print quality cannot
be guaranteed.
I-1 Light
Possible cause
Step
Check
Result
Remedy
Ground
contacts
Toner sensing
failure
(machine side)
1
Can printing be started with the
drum unit and toner cartridge
removed?
Yes
Check if the toner
sensor is dirty and
check the toner
sensor connection.
Toner sensing
failure
(toner cartridge
side)
2
Is the problem solved when 4
or 5 pages are printed after the
toner cartridge is replaced with
a full one?
Yes
The wiper of the toner
cartridge is defective.
Replace the toner
cartridge.
Drum
connection
failure
3
Are all the contacts between
the drum unit and machine
connected correctly?
No Clean
contact
electrodes both on the
drum unit and in the
machine.
High-voltage
power supply
PCB failure
4
Is the harness connection
between the high-voltage
power supply PCB and the
engine PCB correct?
Yes
Replace the high-
voltage power supply
PCB.
Engine PCB /
Main PCB
failure
5
Is the harness connection
between the engine PCB and
the main PCB correct?
Yes
Replace the engine
PCB or the main PCB.
Dirt on the
scanner window
6
Is there any dirt on the scanner
window?
Yes
Wipe it off with a soft
clean paper.
Laser unit failure
7
Is the problem solved after
replacing the laser unit?
Yes
Replace the laser unit.
User Check
(1) Check the printer’s environment. Conditions such as humidity, high
temperatures, etc. may cause this situation to occur.
(2) If the whole page is light, toner save mode may be on. Disable toner save mode
within Printer Properties tab of the driver.
(3) Try installing a new toner cartridge or drum unit.
Содержание MFC-8220
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Страница 150: ...CHAPTER 4 DISASSEMBLY AND RE ASSEMBLY 4 72 EM4 EM4 EM4 Molykote EM D110 4 mm dia ball Eject roller ASSY ...
Страница 170: ...MFC 8220 SERVICE MANUAL 5 17 9 Insert the power cord to the machine Fig 5 26 Power cord Machine ...
Страница 244: ...CHAPTER 7 MAINTENANCE MODE 7 6 Fig 7 2 a b c d e f g h i j ...
Страница 312: ...APPENDIX 4 CIRCUIT DIAGRAM A 48 Appendix 4 1 Main PCB Circuit Diagram 1 6 ...
Страница 313: ...MFC 8220 SERVICE MANUAL A 49 Appendix 4 2 Main PCB Circuit Diagram 2 6 ...
Страница 314: ...APPENDIX 4 CIRCUIT DIAGRAM A 50 Appendix 4 3 Main PCB Circuit Diagram 3 6 ...
Страница 315: ...MFC 8220 SERVICE MANUAL A 51 Appendix 4 4 Main PCB Circuit Diagram 4 6 ...
Страница 316: ...APPENDIX 4 CIRCUIT DIAGRAM A 52 Appendix 4 5 Main PCB Circuit Diagram 5 6 ...
Страница 317: ...MFC 8220 SERVICE MANUAL A 53 Appendix 4 6 Main PCB Circuit Diagram 6 6 ...
Страница 318: ...APPENDIX 4 CIRCUIT DIAGRAM A 54 Appendix 4 7 Engine PCB Circuit Diagram 1 2 ...
Страница 319: ...MFC 8220 SERVICE MANUAL A 55 Appendix 4 8 Engine PCB Circuit Diagram 2 2 ...
Страница 320: ...APPENDIX 4 CIRCUIT DIAGRAM A 56 Appendix 4 9 NCU PCB Circuit Diagram Europe ...
Страница 321: ...MFC 8220 SERVICE MANUAL A 57 Appendix 4 10 NCU PCB Circuit Diagram U S A ...
Страница 322: ...APPENDIX 4 CIRCUIT DIAGRAM A 58 Appendix 4 11 Control Panel PCB Circuit Diagram ...
Страница 323: ...MFC 8220 SERVICE MANUAL A 59 Appendix 4 12 Low voltage Power Supply PCB Circuit Diagram ...
Страница 324: ...APPENDIX 4 CIRCUIT DIAGRAM A 60 Appendix 4 13 High voltage Power Supply PCB Circuit Diagram 100V ...
Страница 325: ...MFC 8220 SERVICE MANUAL A 61 Appendix 4 14 High voltage Power Supply PCB Circuit Diagram 200V ...
Страница 326: ...APPENDIX 4 CIRCUIT DIAGRAM A 62 Appendix 4 15 Back Light PCB Circuit Diagram ...
Страница 328: ...February 04 SM FAX026 6 8X5913 Printed in Japan ...