VI
- 17
Possible cause
Step
Check
Result
Remedy
Thermal fuse
1
Is the thermal fuse located in the fixing unit
conductive?
No
Replace the fixing unit.
Thermistor
2
Remove the fixing unit from the printer and
measure the resistance between two pins of
the 2 pin connector on the fixing PCB. Is the
measured resistance within the range of
1.0 M 1.6M (normal temperature)?
No
Replace the fixing unit.
"50 FUSER MALF" is displayed
M-14
Fixing heat
roller
3
Is the fixing heat roller located in the fixing unit
conductive?
No
Replace the fixing heat roller.
Low-voltage
power supply
PCB
4
When the power is switched on, does the
voltage at connector pin P4-1 on the main
PCB go from 5V to 0V?
Yes
Replace the low-voltage
power supply PCB assy.
Main PCB
5
Make sure if:
The EP-ED cartridge is installed in the printer
correctly.
The upper cover of the printer is closed.
A paper-loaded cassette is mounted.
No
Replace the main PCB assy.
Note: When the printer has detected a fixing unit malfunction, do not power on for about 15
minutes.
Even if the power is on, the printer will shut off the power supply to the fixing heat roller
to prevent the fixing the unit from overheating.
Replace the main PCB assy ,
the SCN harness 4P,SCN flat
cable 6P or the scanner unit.
Possible cause
Step
Check
Result
Remedy
Main PCB
Scanner harness
1
Is the problem remedied when the power off
and on again?
No
"51 LASER BD MALF" is displayed
M-15
Replace the main PCB assy,
the SCN harness 4P, SCN flat
cable 6P or the scanner unit.
Possible cause
Step
Check
Result
Remedy
Main PCB
Scanner harness
1
Is the problem remedied when the power off
and on again?
No
"52 SCANNER MALF" is displayed
M-16
Scanner unit
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 ...