e-STUDIO5540C/6540C/6550C/5560C/6560C/6570C © 2011 - 2015 TOSHIBA TEC CORPORATION All rights reserved
ERROR CODE and TROUBLESHOOTING
8 - 334
8.5.25 Uneven light distribution
Fig.8-34
Cause/Section Step Check item Measures
Laser optical
unit, Main
charger grid
1 Perform the enforced performing of
image quality closed-loop control (05-
2742).
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.
Original glass 2 Is the original glass dirty? Clean the glass.
Main charger 3 Are the needle electrode, grid and
case dirty?
Clean or replace them.
Discharge LED 4 Is the Discharge LED dirty? Clean it.
Scanner 5 Are the reflector, exposure lamp,
mirrors, lens, etc. dirty?
Clean them.
Exposure lamp 6 Is the exposure lamp tilted? Adjust the installed position of the
lamp.
7 Is the lamp discolored or degraded? Replace it.
Process unit 8 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?
Remove the foreign material.
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