VI
- 4
3.2 Troubleshooting Image Defects
Yes
Possible cause
Step
Check
Result
Remedy
1
Yes
2
I-1
Yes
3
Yes
Light
4
No
5
9
Yes
Toner shortage
Replace EP-ED cartridge.
Adjust the proper setting
on the control panel.
During a printing, open the toner cartridge lid
in the printer and pull out the EP-ED cartridge.
Go to the Step 9.
Paper failure
Does the print quality improve when fresh
paper is used?
Use recommended paper.
Does printed image improve when printed
density setting is changed on the control
panel ?
Printing
density setting
Does printed image improve when the EP-ED
cartridge is replaced?
Transfer input
signal error
Do the pins 7 and 8 of the connector P6
on the main PCB have the following value
respectively when a sheet of paper is fed from
the MP tray?
P6-7 pin (HVT2) --- Change in voltage from
15V approx. to 0V about 1 second after paper
feeding.
P6-8 pin (HVT3) --- Change in voltage from
9V approx. to 0V just when the voltage at the
7 pin changes from 0V to 15V.
Replace the main PCB assy
or the harness.
Dirt on power
supply terminal
Failure in the
transfer high-
voltage circuit
Clean the transfer roller right end bearing, the
check continuity between the transfer roller
power supply spring and the terminal of the
high-voltage transfer unit. Is there continuity?
Clean the contact to assure
the continuity.
Replace the high-voltage
power supply assy.
Insufficient LD
light
Does print quality improve when the scanner
unit is improved?
Replace the scanner unit or
the harness.
Yes
-
7
8
6
No
ECONOMY
mode
Is the ECONOMY mode active?
Yes
Cancel the ECONOMY
mode.
Transfer roller
failure
Yes
Does the print quality improve when print is
made with transfer roller changed?
Clean the transfer roller [Use
dry lint-free paper (producing
little paper dust) to clean the
transfer roller. Never use
solvents] and, if dirts subsist,
replace the transfer roller assy.
Open the drum shutter of the EP-ED cartridge
and check the toner image on the drum.
Is the toner image before transfer is light?
Continued to the following page
Summary of Contents for HL-1660 Series
Page 1: ......
Page 109: ...Appendix 3 Main PCB Circuitry Diagram 1 7 CODE UK3787000 B48K294 295CIR 1 7 NAME A 3 ...
Page 110: ...Appendix 4 Main PCB Circuitry Diagram 2 7 CODE UK3787000 B48K294 295CIR 2 7 NAME A 4 ...
Page 111: ...Appendix 5 Main PCB Circuitry Diagram 3 7 CODE UK3787000 B48K294 295CIR 3 7 NAME A 5 ...
Page 112: ...Appendix 6 Main PCB Circuitry Diagram 4 7 CODE UK3787000 B48K294 295CIR 4 7 NAME A 6 ...
Page 113: ...Appendix 7 Main PCB Circuitry Diagram 5 7 CODE UK3787000 B48K294 295CIR 5 7 NAME A 7 ...
Page 114: ...Appendix 8 Main PCB Circuitry Diagram 6 7 CODE UK3787000 B48K294 295 CIR 6 7 NAME A 8 ...
Page 115: ...Appendix 9 Main PCB Circuitry Diagram 7 7 CODE UK3787000 B48K294 295CIR 7 7 NAME A 9 ...
Page 116: ...Appendix 10 Control Panel PCB Circuitry Diagram 1 1 A 10 CODE NAME UK2527000 B48K143CIR ...
Page 117: ...Appendix 11 Scanner LD PCB Circuitry Diagram 1 1 A 11 CODE NAME UK2674000 B48K165CIR ...
Page 118: ...I Brother Laser Printer HL 1260e HL 1660 series USER S GUIDE ...
Page 328: ...APPENDICES Appendix 17 PC 8 10U PC 8 D N 11U PC 850 12U PC 852 17U ...
Page 330: ...APPENDICES Appendix 19 Legal 1U Ventura Math 6M Ventura Intl 13J Ventura US 14J ...
Page 331: ...USER S GUIDE Appendix 20 PS Math 5M PS Text 10J Math 8 8M Pi Font 15U ...
Page 332: ...APPENDICES Appendix 21 MS Publishing 6J Windows 3 0 9U Desktop 7J MC Text 12J ...
Page 334: ...APPENDICES Appendix 23 ...
Page 336: ...APPENDICES Appendix 25 PC 8 PC 8 D N PC 850 PC 852 ...
Page 337: ...USER S GUIDE Appendix 26 PC 860 PC 863 PC 865 PC 8 Turkish ...
Page 338: ...APPENDICES Appendix 27 IBM Mode PC 8 PC 8 D N PC 850 PC 852 ...
Page 339: ...USER S GUIDE Appendix 28 PC 860 PC 863 PC 865 PC 8 Turkish ...
Page 340: ...APPENDICES Appendix 29 HP GL Mode ANSI ASCII 9825 CHR SET ...
Page 341: ...USER S GUIDE Appendix 30 FRENCH GERMAN SCANDINAVIAN SPANISH LATIN JIS ASCII ...
Page 342: ...APPENDICES Appendix 31 ROMAN8 EXT ISO IRV ISO SWEDISH ISO SWEDISH N ...
Page 343: ...USER S GUIDE Appendix 32 ISO NORWAY 1 ISO GERMAN ISO FRENCH ISO U K ...
Page 344: ...APPENDICES Appendix 33 ISO ITALIAN ISO SPANISH ISO PORTUGUESE ISO NORWAY 2 ...
Page 407: ...LASER PRINTER PARTS REFERENCE LIST HL 1660e ...
Page 414: ...5 MAIN PCB MODEL HL 1660e 54T U03 103 4 4 4 1 2 2 6 4 5 3 4 1 ...