(No.YA492)1-21
4.7
ADJUSTMENT PROCEDURE
4.7.1 VIDEO CIRCUIT
SECTION 5
TROUBLESHOOTING
This service manual does not describe TROUBLESHOOTING.
Item
Measuring
instrument
Test point
Adjustment part
Description
WHITE
BALANCE
(HIGHLIGHT)
Remote
control unit
Signal
generator
[1.ADJUST]
S031: CVBS R DR (Red drive)
S032: CVBS G DR (Green drive)
S033: CVBS B DR (Blue drive)
(1) Receive a PAL 75% all white signal.
(2) Set PICTURE MODE to
"STANDARD"
.
(3) Set ZOOM to
"FULL"
.
(4) Set COLOUR TEMP. to
"NORMAL"
.
(5) Select
"1.ADJUST"
from the SERVICE MODE.
(6) Adjust to Keep one of
<S031>
(Red drive),
<S032>
(Green drive) or
<S033>
(Blue drive)
unchanged, then lower the other two so that the
all-white screen is equally white throughout.
NOTE:
Set one or more of
<S031>
,
<S032>
, and
<S033>
to
"137"
.
(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 memorize the set
value.
