Uneven Image Density - Toshiba e-STUDIO2006 Service Manual

8.4.16

Uneven image density

Defective area
Main charger
Transfer roller unit
Laser optical unit
Discharge LED
Developer unit
Scanner
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Fig.8-18
Step Check items
1 Is the main charger dirty?
2 Is the transfer roller contacting with
the drum? Are the charger pushing-
spring and the transfer roller
pressure spring installed properly?
3 Is there dirt on the f lens?
4 Are the connectors of discharge LED
harness securely connected?
5 Is the discharge LED dirty?
6 Is any of the discharge LEDs off?
7 Is the magnetic brush in proper
contact with the drum?
8 Is the developer sleeve
pressurization mechanism working?
9 Is the developer material transported
normally?
10 Is the original cover or RADF
opened?
11 Are the original glass (especially the
position of shading correction plate)
and CIS unit dirty?
e-STUDIO2006/2306/2506/2007/2307/2507/2303A/2303AM/2803AM/2309A/2809A
8 - 83
Prescription
Clean or replace the needle
electrode and main charger grid.
Check them and reinstall if required.
Remove the foreign matter or stain.
Reconnect the harness securely.
Clean the discharge LED.
Replace the discharge LED.
Adjust the doctor-sleeve gap.
Check the mechanism.
Remove foreign matters if there is
any.
Close the original cover or RADF.
Clean them.
ERROR CODE AND TROUBLESHOOTING
8