Toshiba E-STUDIO520, Service Manual, Page: 312 / 592

e-STUDIO520/600/720/850 PREVENTIVE MAINTENANCE (PM) March 2005 © TOSHIBA TEC
4 - 24
* 6. Main charger case / main charger wire
Clean the main charger case and wire with a cloth soaked in water and squeezed tightly,
and then wipe them with a dry cloth.
Note: Note:
Be careful of the following when attaching a new wire (length: 363mm).
- Insert the wire securely into the V-grooves of the front and rear sides.
- Do not twist the wire.
- Do not touch the wire with your bare hand.
* 7. Cleaner Unit / Image quality sensor
Be sure to connect the ground wire to an aluminum die cast to prevent the image quality
sensor from being damaged by static electricity before you clean the cleaner unit. Then
clean the unit with a vacuum cleaner.
Also wipe the window of the image quality sensor with cotton swabs or tissues after having
cleaned the cleaner unit. Do not use a vacuum cleaner for the sensor. Be sure to clean the
window of the image quality sensor since the sensor may not function properly if this win-
dow is dirty.
* 8. Drum cleaning blade / Drum cleaning brush
The edge of the blade is breakable and can be easily damaged by matters such as the
adherence of paper dust. Replace the cleaning blade and brush with new ones if poor
images are copied due to the damaged blade regardless of the number of copies which
have been made.
* 9. Recovery blade
Replace the recovery blade regardless the number of copies if the edge of the blade get
damaged.
* 10. Separation fingers for the drum
The paper jam may be caused if the tip of the separation finger is damaged or deformed. If
there is any problem with it, replace the finger with a new one regardless of the number of
copies which have been made.
If any mark which was made by the finger appears on the printed image, clean the tip of
the finger.
Fig.4-16 Fig.4-17
Connected to earth
Image quality sensor