IV-9
I-5
Dirt on the back of paper
Possible cause
Step
Check
Result
Remedy
Fixing unit
1
Is the pressure roller dirty?
Is any other area in the printer
dirty?
Yes
Clean the pressure roller.
(See the following note.)
Dirt in the drum
unit
2
Is the transfer roller dirty?
is the problem solved after the
drum unit replaced?
Yes
Replace the drum unit
No
Replace the H.V. power supply
PCB.
Note:
Cleaning of the pressure roller
(1) Set three or more sheets of paper in MP sheet feeder 1 (or 2).
2)
Open the top cover.
(3) Turn on the power switch while holding down the switch on the control
panel.
(4) Release the panel switch when the Drum lamp is on.
(5) Close the top cover.
(6) Hold down the panel switch until the Ready lamp is on, and then release
the switch.
(7) Print three patterns; grid, zip and solid black.
(8) Turn off the power switch with the top cover closed.
(9) Set paper in the manual slot with the solid black side up.
(10) Turn on the power switch while holding down the switch on the control
panel.
(11) Release the panel switch when the Drum lamp is on.
(12) Press the panel switch again and release it immediately.
(13) Print a page of test pattern while cleaning the pressure roller.
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 ...