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Adjustment after exchange of the video signal processing board [AG]
1. Contrast Adjustment
Adjustment jig
Color pattern generator
Oscilloscope
Meassuring location TP47G (board [A])
Board [A], coupler [A31], pin 2
Adjustment location Remote control buttons [VOL +/-]
Input signal
Studio color bar
1. Make the following setting in service maintenance mode.
2. Connect TPD2 of board [D] and TP02 of board [A] to earth.
3. Receive a studio color bar.
4. Confirm that the video signal at pin
1.95 0.22V
5. Select the item [
6. Adjust with the remote control buttons [VOL +/-] so that the signal at
3.0 0.05V
7. Confirm that there is no shrinkage of the waveform. If there is, select
8. Return the adjustment value for [G-CUT] of "WB sub-adjustment" to
9. Remove the earth from TPD2 of board [D] and TP02 of board [A].
Adjustment conditions
Image menu
Image adjustment
At this time, record the original values.
(Sub-adjustment)
WB
(WB adjustment)
[A] is 1.95
0.22V.
adjustment) in service maintenance mode (omitted in the following).
TP47G of board [A] becomes 3.0
Next, set the value to 35 steps (hexadecimal) below this adjustment
value. (Press the remote control button [VOL -] 335 times.)
the item [
] (Black level) of [
correct with the remote control buttons [VOL +/-].
the original value.
Next, perform "2. Color Output, Hue Adjustment".
If "2. Color Output, Hue Adjustment" is not to be performed, go to
the following step 9..
- 26 -
Dynamic
Picture
Maximum (+30)
Black level
Center (0)
Sharpness
Center (+10)
2F
(Black level)
G-CUT
7F
of the coupler A31 of board
] (PICTURE) of [
] (Sub-
0.05V.
] (Sub-adjustment) and
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