Uneven Image Density - Toshiba e-STUDIO205L Service Handbook

6.4.16

Uneven image density

Defective area
Main charger
Transfer roller unit
Laser optical unit
Discharge LED
Developer unit
Scanner
e-STUDIO205L/255/305/355/455
ERROR CODE AND TROUBLESHOOTING
Fig. 6-17
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 any foreign matter or stain on
the slit glass?
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),
mirror and lens dirty?
6 - 136
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.
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