I-12
Image distortion
Possible cause
Step
Check
Result
Remedy
Scanner
1
Is the scanner unit secured to the
frame normally?
Is there any play?
Yes
Secure the unit
normally with the
screws.
Scanner LD
emission failure
Scanner motor
rotation failure
2
Is laser portion of the laser scanner
motor defective?
Yes
Replace the scanner
unit.
Scanner
connection
failure
3
Is the scanner harness connected
normally?
Is it coming loose?
Yes
Connect the harness
tightly.
I-13
Blurred at either side
Print out test print out test print out test Print out test print o
Print out test print out test print out test Print out test print o Print out test print o
Print out test print out test print out test Print out test print o
Print out test print out test print out test Print out test print o Print out test print o
Print out test print out test print out test Print out test print o
Print out test print out test print out test Print out test print o Print out test print o
Print out test print out test print out test Print out test print o
Print out test print out test print out test Print out test print o Print out test print o
Print out test print out test print out test Print out test print o
Print out test print out test print out test Print out test print o Print out test print o
Print out test print out test print out test Print out test print o
Print out test print out test print out test Print out test print o Print out test print o
Print out test print out test print out test Print out test print o
Print out test print out test print out test Print out test print o Print out test print o
Print out test print out test print out test Print out test print o
Print out test print out test print out test Print out test print o Print out test print o
Print out test print out test print out test Print out test print o
Print out test print out test print out test Print out test print o Print out test print o
Print out test print out test print out test Print out test print o
Print out test print out test print out test Print out test print o Print out test print o
Print out test print out test print out test Print out test print o
Print out test print out test print out test Print out test print o Print out test print o
Print out test print out test print out test Print out test print o
Print out test print out test print out test Print out test print o Print out test print o
Print out test print out test print out test Print out test print o
Print out test print out test print out test Print out test print o Print out test print o
Print out test print out test print out test Print out test print o
Print out test print out test print out test Print out test print oPrint out test print o
Print out test print out test print out test Print out test print o
Print out test print out test print out test Print out test print oPrint out test print o
Print out test print out test print out test Print out test print o
Print out test print out test print out test Print out test print oPrint out test print o
Print out test print out test print out test Print out test print o
Print out test print out test print out test Print out test print oPrint out test print o
Print out test print out test print out test Print out test print o
Print out test print out test print out test Print out test print oPrint out test print o
Print out test print out test print out test Print out test print o
Print out test print out test print out test Print out test print oPrint out test print o
Print out test print out test print out test Print out test print o
Print out test print out test print out test Print out test print oPrint out test print o
Print out test print out test print out test Print out test print o
Print out test print out test print out test Print out test print oPrint out test print o
Print out test print out test print out test Print out test print o
Print out test print out test print out test Print out test print oPrint out test print o
Print out test print out test print out test Print out test print o
Print out test print out test print out test Print out test print oPrint out test print o
Print out test print out test print out test Print out test print o
Print out test print out test print out test Print out test print oPrint out test print o
Print out test print out test print out test Print out test print o
Print out test print out test print out test Print out test print oPrint out test print o
Print out test print out test print out test Print out test print o
Print out test print out test print out test Print out test print oPrint out test print o
Possible cause
Step
Check
Result
Remedy
Leaning of the
printer
1
Is the printer placed horizontally?
No
Place the printer on
a flat table.
Drum unit
2
Is the problem happened just after
replacing the drum unit with a new
one?
Yes
Shake the drum unit
horizontally with
care.
Содержание HL-720
Страница 1: ...SERVICE MANUAL MODEL HL 720 730 730Plus R LASER PRINTER ...
Страница 36: ...II 19 1 3 10 Engine I O HL 720 Fig 2 21 shows the engine interface circuit Fig 2 21 ...
Страница 37: ...II 20 HL 730 730Plus Fig 2 22 shows the engine interface circuit Fig 2 22 ...
Страница 61: ... Fig 3 18 2 4 1 1 1 ...
Страница 92: ...SERVICE MANUAL MODEL HL 760 R LASER PRINTER ...
Страница 109: ...II 8 1 3 4 DRAM Two 4M bit DRAMs x 16bits are used as the RAM Fig 2 6 ...
Страница 113: ...II 12 1 3 10 Engine I O Fig 2 12 shows the engine interface circuit Fig 2 12 ...
Страница 114: ...II 13 1 3 11 Paper Feed Motor Drive Circuit Fig 2 13 ...
Страница 133: ...Appendix 2 Main PCB Circuit Diagram 1 3 CODE UK3227000 B48K272CIR 1 3 NAME ...
Страница 134: ...Appendix 3 Main PCB Circuit Diagram 2 3 CODE UK3227000 B48K272CIR 2 3 NAME ...
Страница 135: ...CODE UK3227000 B48K272CIR 3 3 NAME Appendix 4 Main PCB Circuit Diagram 3 3 ...