JVC AV-29L6SU Service Manual page 24

4.8.4 VIDEO CIRCUIT
Measuring
Item
instrument
WHITE BALANCE Signal
generator
Remote
control unit
SUB BRIGHT Remote
control unit
SUB CONTRAST Remote
control unit
1-24 (No.YA366)
Test point Adjustment part
[2. V/C]
2.CUTOFF R
3.CUTOFF G
4.CUTOFF B
5.DRIVE R
6.DRIVE G
[2. V/C]
8. BRIGHT
[2. V/C]
9. CONT.
Description
(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 COLOUR TEMP to NORMAL.
(5) Select 2.V/C from the SERVICE MODE.
(6) Each select < 2.CUTOFF R >, < 3.CUTOFF G >,
< 4.CUTOFF B > and adjust the screen until the
black portion in the screen becomes black.
(7) Each select < 5.DRIVE R >, < 6.DRIVE G > and
adjust the screen until the white portion in the
screen becomes white.
NOTE:Do not adjust < 7.DRIVE B >
(8) Press the [OK] key to memorize the set value.
(9) Change the contrast and brightness from low-light
to high-light and check that the tracking of the white
balance is good.
(1) Receive any broadcast.
(2) Set the ZOOM mode to REGULAR.
(3) Set the PICTURE mode to STANDARD.
(4) Select 2.V/C from the SERVICE MODE.
(5) Set the initial setting value of < 8.BRIGHT >.
(6) If the brightness is not the best with the initial set-
ting value, make fine adjustment until you get the
best brightness.
(7) Press the [OK] key to memorize the set value.
(1) Receive any broadcast.
(2) Set the ZOOM mode to REGULAR.
(3) Set the PICTURE mode to STANDARD.
(4) Select 2.V/C from the SERVICE MODE.
(5) Set the initial setting value of < 9.CONT. >.
(6) If the contrast is not the best with the initial setting
value, make fine adjustment until you get the best
contrast.
(7) Press the [OK] key to memorize the set value.