IV-12
I-11
Poor fixing
Possible cause
Step
Check
Result
Remedy
Printing paper
1
Is thick paper more than 36lb
weight in use?
Yes
Instruct the user to use paper
of the recommended weight
and thickness.
Toner sensing
failure
2
Is the problem solved by
replacing the drum unit or the
toner cartridge?
(When printing is faint.)
Yes
Toner is empty.
The toner sensing is defective,
clean the toner sensor.
If the wiper in the toner
cartridge is broken, replace the
toner cartridge with a new one.
Thermistor
failure
3
Is the thermistor fitted
correctly?
No
Fit the thermistor correctly.
Low-voltage
power supply
PCB failure
4
Is the problem solved by
replacing the low-voltage
power supply PCB?
Yes
Replace the low-voltage power
supply PCB.
I-12
Image distortion
Possible cause
Step
Check
Result
Remedy
Scanner
1
Is the scanner unit secured to
the frame incorrectly?
Is there any play?
Yes
Secure the unit correctly and
tighten the screws.
Scanner LD
emission failure
Scanner motor
rotation failure
2
Is the laser diode or the laser
scanner motor defective?
Yes
Replace the scanner unit.
Scanner
connection
failure
3
Is the scanner harness
connected properly?
Is it coming loose?
Yes
Connect the harness correctly.
Summary of Contents for HL-1070 - B/W Laser Printer
Page 1: ......
Page 20: ...II 4 Fig 2 4 ...
Page 24: ...II 8 1 3 5 DRAM Four 16Mbit DRAM x 16bit are used as the printer memory Fig 2 7 ...
Page 28: ...II 12 1 3 11 Engine I O Fig 2 14 and 2 15 show the engine interface circuit Fig 2 13 ...
Page 29: ...II 13 Fig 2 14 ...
Page 64: ...III 24 4 PACKING Fig 3 39 Documents Accessories Carton Pad Pad PE sheet Bag Pad Pad Carton ...
Page 96: ...CODE UK3958 000 B48K302 1CIR NAME A 3 Appendix 3 Main PCB Circuit Diagram 1 5 ...
Page 97: ...CODE UK3958 000 B48K302 1CIR NAME A 4 Appendix 4 Main PCB Circuit Diagram 2 5 ...
Page 98: ...CODE UK3958 000 B48K302 1CIR NAME A 5 Appendix 5 Main PCB Circuit Diagram 3 5 ...
Page 99: ...CODE UK3958 000 B48K302 1CIR NAME A 6 Appendix 6 Main PCB Circuit Diagram 4 5 ...
Page 100: ...Appendix 7 Main PCB Circuit Diagram 5 5 CODE UK3958 000 B48K302 1CIR NAME A 7 ...
Page 101: ...Appendix 8 Driver PCB Circuit Diagram CODE UK3634000 B48K280CIR NAME A 8 ...
Page 106: ...Appendix 13 SR PCB Circuit Diagram CODE UK3653000 B48K284CIR NAME A 13 ...
Page 107: ...Apr 98 54U011BE0 PARTS REFERENCE LIST MODEL HL 1070 R LASER PRINTER ...
Page 241: ...APPENDIX A 11 HP LaserJet 6P EPSON FX 850 IBM Proprinter XL EPSON FX 850 PC 850 ...