Toshiba e-studio600 Service Manual page 462

9) White banding (in the feeding direction)
Defective area
Laser optical unit
Main charger grid
Developer unit
Drum
Transport path
Discharge LED
Scanner
Cleaner
e-STUDIO520/600/720/850 TROUBLESHOOTING
Step Check items
1 Is there a foreign matter or stain on
the slit glass?
2 Is there a foreign matter or dew on
the charger grid?
3 Is the developer material transported
properly?
4 Is there a foreign matter or dew on
the Polyurethane seal?
5 Is the upper Polyurethane seal of the
developer unit in contact with the
drum?
6 Is there a foreign matter on the drum
surface?
7 Does the toner image contact with
any foreign matter before the paper
enters the fusing section after the
separation?
8 Is any of the discharge LEDS off?
9 Is there a foreign matter on the light
path?
10 Are the original glass (especially the
position of shading correction plate)
mirror and lens dirty?
11 Is there any foreign matter, which
contacts the drum on the cleaner
stay?
Fig.5-9
Remove the foreign matter or stain.
Remove the foreign matter.
Remove the foreign matter if there is
any.
Remove the foreign matter or dew.
Correct the position of the Polyure-
thane seal or replace it.
Replace the drum.
Remove the foreign matter.
Replace the discharge LED.
Remove the foreign matter.
Clean them.
Remove the foreign matter.
5 - 134
Prescription
March 2005 © TOSHIBA TEC