JVC HD-Z56RF7/A Service Manual page 34

4.7.3 VIDEO CIRCUIT
Measuring
Item
instrument
WHITE Remote
BALANCE control unit
(HIGHLIGHT)
Signal
generator
1-34 (No.YA460)
Test point Adjustment part
[1.ADJUST]
S001: R DRIVE (Red drive)
S002: G DRIVE (Green drive)
S003: B DRIVE (Blue drive)
Description
(1) Receive a PAL 75% all white pattern.
(2) Set "PICTURE MODE" to "STANDARD".
(3) Set "ZOOM" to "FULL".
(4) Select "WHITE BALANCE" to "MID".
(5) Select "1.ADJUST" from the SERVICE
MODE.
(6) Adjust to keep one of <S001> (Red drive),
<S002> (Green drive) or <S003> (Blue drive)
unchanged, then lower the other two so that
the all-white screen
throughout.
NOTE:
Set one or more of <S001>, <S002>, and
<S003> to "138".
(7) Check that white balance is properly tracked
from low light to high light. If the white balance
tracking is deviated, adjust to correct it.
(8) Press the [MUTING] key to memoirze the set
value.
is equally white