Uneven Light Distribution - Toshiba e-STUDIO 5540C Service Manual

8.5.25

Uneven light distribution

Cause/Section Step
Laser optical 1
unit, Main
charger grid
Original glass 2
Main charger 3
Discharge LED 4
Scanner 5
Exposure lamp 6
7
Process unit 8
e-STUDIO5540C/6540C/6550C/5560C/6560C/6570C
ERROR CODE and TROUBLESHOOTING
Fig.8-34
Check item
Perform the enforced performing of
image quality closed-loop control (05-
2742).
Is the original glass dirty?
Are the needle electrode, grid and
case dirty?
Is the Discharge LED dirty?
Are the reflector, exposure lamp,
mirrors, lens, etc. dirty?
Is the exposure lamp tilted?
Is the lamp discolored or degraded?
Is the laser beam interrupted by a
foreign material adhering to the
doctor blade area of the developer
unit or the charger case of the main
charger?
When the enforced performing of
image quality closed-loop control is
performed, the automatic cleaning of
main charger and the LSU slit glass
cleaning are performed at the same
time.
Clean the glass.
Clean or replace them.
Clean it.
Clean them.
Adjust the installed position of the
lamp.
Replace it.
Remove the foreign material.
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8 - 334
Measures