VI-4
3.2
Troubleshooting Image Defects
I-1 Light
Possible cause
Step
Check
Result
Remedy
Toner shortage
1
Does printed image improve when the
EP-ED HC cartridge is replaced?
Yes
Replace EP-ED HC
cartridge.
ECONOMY
mode
2
Is the ECONOMY mode active?
Yes
Cancel the ECONOMY
mode.
Printing
density setting
3
Does printed image improve when printed
density setting is changed on the control
panel?
Yes
Adjust the proper setting
on the control panel.
4
During a printing, open the toner cartridge lid
in the printer and pull out the EP-ED HC
cartridge.
Open the drum shutter of the EP-ED HC
cartridge and check the toner image on the
drum.
Is the toner image before transfer is light?
Yes
Go to the Step 9.
Paper failure
5
Does the print quality improve when fresh
paper is used?
Yes
Use recommended paper.
Transfer roller
failure
6
Does the print quality improve when print is
made with transfer roller changed?
Yes
Clean the transfer roller
[Use dry lint-free paper
(producing little paper
dust) to clean the
transfer roller. Never use
solvents] and, if dirt
subsists, replace the
transfer roller assy.
Transfer input
signal error
7
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.
No
Replace the main PCB
assy or the harness.
Dirt on power
supply terminal
8
Clean the transfer roller right end bearing, the
check continuity between the transfer roller
power supply spring and the terminal
No
Clean the contact to
assure the continuity.
Failure in the
transfer high-
voltage circuit
of the high-voltage transfer unit.
Is there continuity?
Yes
Replace the high-voltage
power supply assy.
Insufficient LD
light
9
Does print quality improve when the laser unit
is improved?
Yes
Replace the laser unit or
the harness.
Continued to the following page
Summary of Contents for HL-2060
Page 1: ...MECHANICS ELECTRONICS SERVICE MANUAL LASER PRINTER ...
Page 41: ...III 8 A B F C D E 1 E 2 E 3 E 4 E 5 F Figure 3 7 Paper Feed Size SW PCB Circuit ...
Page 129: ...VII 16 Test for memory MEMORY DISPLAY MEMORY DEBUG MEMORY TEST exit MENU ...
Page 137: ...Appendix A 3 Main PCB Circuitry Diagram 1 7 CODE UK4058000 B512006 CIR 1 7 NAME A 3 ...
Page 138: ...Appendix A 4 Main PCB Circuitry Diagram 2 7 CODE UK4058000 B512006 CIR 2 7 NAME A 4 ...
Page 139: ...Appendix A 5 Main PCB Circuitry Diagram 3 7 CODE UK4058000 B512006 CIR 3 7 NAME A 5 ...
Page 140: ...Appendix A 6 Main PCB Circuitry Diagram 4 7 CODE UK4058000 B512006 CIR 4 7 NAME A 6 ...
Page 141: ...Appendix A 7 Main PCB Circuitry Diagram 5 7 CODE UK4058000 B512006 CIR 5 7 NAME A 7 ...
Page 142: ...Appendix A 8 Main PCB Circuitry Diagram 6 7 CODE UK4058000 B512006 CIR 6 7 NAME A 8 ...
Page 143: ...Appendix A 9 Main PCB Circuitry Diagram 7 7 CODE UK4058000 B512006 CIR 7 7 NAME A 9 ...
Page 144: ...Appendix A 10 Control Panel PCB Circuitry Diagram 1 1 CODE UK4077000 B512005 CIR NAME A 10 ...
Page 145: ...Appendix A 11 Laser LD PCB Circuitry Diagram 1 1 CODE UK3253000 B48K253 CIR NAME A 11 ...
Page 147: ...June 98 54T046NE0 HL2060 ...