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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.
Mode
Record
Color bar signal whose chroma and
Signal
burst signals are turned off
Measurement Point
Pin @ of CNO02 (VG)
Oscilloscope
External trigger:
Measuring Instrument
Pin @ of ICOOS
D
Adjustment Page
Adjustment Address
Specified Value
Adjusting method:
1)
Release the protect.
Page: 1, address: 00, data: 01
2) Change the data of page: D, address: B.5, 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.
Fig. 7-3-35.
V COM Adjustment
8.
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
Measuring Instrument
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
White (100%)
Pedestal
7-12
Check on the LCD display
Vertical Lmes with Intervals of 3 dots
Enlargement
3 dots between
Fig. 7-3-36.
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