Casio CASSIOPEIA EG-800 Service Manual And Parts List page 53

8-4-2-7. Color Bar Check (including a display adjustment)
1. Tapping 8 COLOR BAR, the following Color Bar check Menu display appears.
** COLOR BAR **
1 Contrast
2 Scroll
3 GRAY
2. Tapping 1 Contrast, the following color bar display appears.
RED
GREEN
BLUE
BLACK
WHITE
Pressing Action Control button, Color Bar check Menu display appears again.
Even if tapping 2 Scroll, this unnecessary check can not be performed because this check
becomes unnecessary.
3. Tapping 3 GRAY, all gray display appears on the screen.
If abnormal displays (flicker, vertical stripe and so on) are detected, change Vcom voltage rotating
the variable resistor VR300.
Refer to page 70 in the Service Manual for E-115 concerning Vcom (Common electrode voltage for
TFT LCD pixel drive).
VR300 can be supplied as one of the spare parts. Refer to PARTS LIST concerning VR300.
To adjust actually, removing the screws assembled onto the lower case, disassemble the unit as
shown below. Then rotate this variable resistor (VR300) using a ceramic screw driver (minus/ 1.8
mm width) to make the screen the normal display (no flicker and no stripes).
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