Sharp EL-99T, Руководство по эксплуатации

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3. How to proceed in the event of abnormal
conditions
If this product is exposed to a powerful external electric field or shock during use, an abnormal
condition may seldom occur in which all of the keys, including the
O
key, do not function. In
the event of such a situation reset it as follows.
How to reset
Reset the OHP projection panel controller only in the following cases.
• When an abnormal condition occurs and all the keys are inoperative.
• To clear all memory contents.
(1) Pull down the notch to open the battery cover located on the back of the OHP projection
panel.
(2) Place the battery cover back until the notch is snapped on.
(3) Press
O
.
The verification window will appear on the screen.
(4) To reset while retaining the memory contents:
Press
O
. The display will return to the initial display.
To reset with clearing all the memory contents:
Press
C
. All memory contents will be cleared and the display will become as follows.
Press any key to return to the calculation screen.
Note:
• If the above verification window does not appear, remove the battery cover and gently push the
RESET switch with the tip of a ball-point pen or similar object.
DO NOT use a tip of a pencil or mechanical pencil; a broken lead may cause a damage to the
switch mechanism.
• If the OHP projection panel does not display the screen, press the SCREEN RESET button on
the panel.