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7.
Contrast Adjustment (PD-53 board)
Set the contrast of the image.
If the contrast is not correct, the image will be blur (whitish) or
saturated.
Signal
Color bar signal whose chroma and
8
burst signals are turned off
Fin @ of CNOO2 (VO
Oscilloscope
External trigger:
Pin © of IC005
Adjustment Address
B5 (CONTRAST)
Specified Value
A=3.0 + 0.1V
Adjusting method:
1)
Release the protect.
Page: 1, address: 00, data: 01
2)
Change the data of page: D, address: B5, and adjust the
voltage (A) between the white (100%) and pedestal to the
specified value.
3)
Press
the
PAUSE
button
of
the
adjusting
remote
commander.
Measuring Instrument
8.
V COM Adjustment
Adjust to the proper DC bias of the common polarity drive signal
of the LCD panel. If it is not correct, the image will be rough,
flickers will be produced easily, and vertical lines will stand out.
Measurement Point
.
:
Check on the LCD display
Measuring Instrument
Adjustment Address
| B7 (V COM CONT)
Vertical Lines with intervals of 3 dots
between
them
at
the
noise
bar
disappears.
Alignment tape:
For checking operations
(WRS-SNSP)
Color bar section
Specified Value
Adjusting method:
1)
Release the protect.
Page: 1, address: 00, data: 01
2)
Change the data of page: D, address: B7, and adjust so that
the vertical lines with intervals of 3 dots between them at the
noise bar disappears.
3)
Press
the
PAUSE
button
of the
adjusting
remote
commander.
Noise bar
Enlargement
ut
3 dots between
Fig. 7-3-36.
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