1-24 (No.YA164)
4.8.4 VIDEO CIRCUIT
Item
Measuring
instrument
Test point
Adjustment part
Description
WHITE BALANCE
Signal
generator
Remote
control unit
[2. V/C]
2.CUTOFF R
3.CUTOFF G
4.CUTOFF B
5.WDR R
6.WDR G
(1) Receive a black and white signal (colour off).
(2) Set the ZOOM mode to REGULAR.
(3) Set the PICTURE MODE to STANDARD.
(4) Set the WHITE BALANCE to MID.
(5) Select 2. V/C from the SERVICE MODE.
(6) Select < 2.CUTOFF R >, < 3.CUTOFF G > and
< 4.CUTOFF B >.
(7) Adjust the screen until the black portion in the screen
becomes black.(Low light)
(8) Select < 5.WDR R > and < 6.WDR G >.
(9) Adjust the screen until the white portion in the screen
becomes white (High light).
(10) Press the [OK] key to memorize the set values.
(11) Change the contrast and brightness with the remote
control up & down from low-light to high-light and
check that the tracking of the white balance is good.
SUB BRIGHT
Remote
control unit
[2. V/C]
8. BRIGHT
(1) Receive any broadcast.
(2) Set the ZOOM mode to REGULAR.
(3) Set the PICTURE MODE to STANDARD.
(4) Set the WHITE BALANCE to MID.
(5) Select 2. V/C from the SERVICE MODE.
(6) Select < 8. BRIGHT >.
(7) Set the initial setting value of < 8.BRIGHT >.
(8) If the brightness is not the best with the initial setting
value, make fine adjustment until you get the best
brightness.
(9) Press the [OK] key to memorize the set values.
SUB CONTRAST
Remote
control unit
[2. V/C]
9. CONTRAST
(1) Receive any broadcast.
(2) Set the ZOOM mode to REGULAR.
(3) Set the PICTURE MODE to STANDARD.
(4) Set the WHITE BALANCE to MID.
(5) Select 2. V/C from the SERVICE MODE.
(6) Select < 9.CONTRAST >.
(7) Set the initial setting value of < 9.CONTRAST >.
(8) If the contrast is not the best with the initial setting
value, make fine adjustment until you get the best
contrast.
(9) Press the [OK] key to memorize the set values.