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B. Troubleshooting Image Defects
1
2
3
4
5
6
Check
Does the print quality improve when
the image density is adjusted?
Does the print quality improve when
the EP-E cartridge Is replaced?
Open the printer while a print Is being
made. and open the drum protective
shield of the EP-E cartridge. Is the
toner image on the drum being
transferred to the paper'? IDo not open
the drum protective shield for more
Does the print quality Improve when
new paper is used?
Does the image become darker when
replaced?
Perform a test print. About two
seconds after the main motor starts,
does the voltage behveen 52 13-9
controller PCB become about 0.76
CHAPTER 6
Result
Procedure
YES
Adjust the image density
using the external device.
YES
Replace the cartridge.
YES
If the toner image is very
YES
Replace the print paper.
Advise the customer of the
method to store
paper.
YES
Replace the roller.
YES
Check the continuity
between the high-voltage
contact and the shaft of the
transfer charging roller. If it
replace the high-voltage
power supply PCB.
NO
Replace the DC controller
PCB.
6-15
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