5
© 2008 TOSHIBA TEC CORPORATION All rights reserved e-STUDIO2820C/2830C/3520C/3530C/4520C
PREVENTIVE MAINTENANCE (PM)
5 - 23
* J3: Drive roller, J4: 2nd transfer facing roller, J6: Tension roller, J7: Idling roller
Fully clean up the toner and such adhering to the roller with alcohol when the transfer belt clean-
ing blade is replaced, since an image failure may occur if there is any dirt remaining on the roller.
Also, remove dust and toner scattering adhering to the inside of the transfer belt unit in order to
keep rollers clean.
* J4: 2nd transfer facing roller
Apply Floil (GE-334C) all around the shaft of the 2nd transfer facing roller, which contacts the
grounding plate inside the 2nd transfer facing roller rear holder.
* J8: Transfer belt cleaning blade
• Handling precautions
Pay attention to the following points as the cleaning blade life is determined by the condition
of its edge.
- Do not allow hard objects to hit or rub against blade edge.
- Do not rub the edge with a cloth or soft pad.
- Do not leave oil (or fingerprints, etc.) on the edge.
- Do not apply solvents such as paint thinner to the blade.
- Do not allow paper fibers or dirt to contact the blade edge.
- Do not place the blade near a heat source.
• Cleaning procedure
Clean the blade edge with a cloth moistened with water and squeezed lightly.
5.5.11 Image quality control unit
Fig. 5-23
* K1: Image quality sensor, K2: Sensor shutter, K3: Image position aligning sensor
Clean the image quality sensor, image position aligning sensor (Front/Rear) and the sensor shut-
ter when replacing the transfer belt cleaning blade and the blade seal, or the transfer belt itself.
Items to check Cleaning
Lubri-
cation/
Coat-
ing
Replacement
Opera-
tion
check
Parts
list
<P-I>
(x 1,000
sheets)
(x 1,000 drive
counts)
K1 Image quality sensor A R R 27-5
K2 Sensor shutter B R R 27-2
K3 Image position aligning sen-
sor
(Front/Rear)
A 27-4
K2
K3
K3
K1
Image quality control unit
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