Troubleshooting - JVC LT-26A70BJ Service Manual

4.7 ADJUSTMENT PROCEDURE
4.7.1 VIDEO CIRCUIT
Measuring
Item
instrument
WHITE Remote
BALANCE control unit
(HIGHLIGHT)
Signal
generator
This service manual does not describe TROUBLESHOOTING.
Test point Adjustment part
[1.ADJUST]
S031: CVBS R DR (Red drive)
S032: CVBS G DR (Green drive)
S033: CVBS B DR (Blue drive)
SECTION 5

TROUBLESHOOTING

Description
(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.
(No.YA492)1-21