Toshiba E-STUDIO230/280 - Manual (Page 289)

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Cleaning the Charger
If the inside of the charger wire become dirty, the dirt may appear on the copy.
* Before start cleaning, BE SURE TO TURN OFF THE POWER, then open the front cover.
To turn the power OFF, see "Turning off the Power (Shutting down)" Page 31.
1 Open the front cover.
2 Clean the charger.
- Hold the cleaning knob, pull it out slowly and fully to the front and
then push it back to the inside carefully and completely. Repeat
this 2 or 3 times.
Make sure that the charger knob is pushed in fully inside.
3 Close the front cover.