JVC InteriArt LT-26C31BC Service Manual page 44

Measuring
Item
instrument
SUB-SCREEN Remote control
BRIGHTNESS unit
Signal generator
0% black part
Black and white
pattern signal
Black and white
pattern signal
<NG>
SUB-SCREEN Remote control
A-D OFFSET unit
Signal generator
Black and white pattern signal
SUB-SCREEN Remote control
CONTRAST unit
Signal generator
White part
Black and white
pattern signal
Black and white
pattern signal
<NG>
1-44 (No.YA169)
Test point Adjustment part
[2. V/C]
11. TWN BRG
(Sub-screen
bright)
Set the 0% black part
to be brightest.
Black and white
pattern signal
Black and white
pattern signal
<OK>
Fig.8
[2. V/C]
7. TWN HI R
(Sub-screen high
light red)
8. TWN HI B
(Sub-screen high
light blue)
Minimize the red and blue noises
in the upper half of the sub (right) screen.
Black and white pattern signal
Fig.9
[2. V/C]
12. TWN CNT
(Sub-screen
contrast)
White part
to be white.
Black and white
pattern signal
Black and white
pattern signal
<OK>
Fig.10
Description
(1) Receive a PAL black and white pattern signal
(including 0% black signal).
(2) Select "2. V/C" from the SERVICE MENU.
(3) Adjust < 11. TWN BRG > (Sub-screen bright) to set
the 0% black part in the sub (right) screen to be the
brightest.
NOTE:
If you select an adjustment item < 11.TWN BRG >,
then the screen automatically turns to twin pictures
mode.
(4) Press the [OK] key to memorize the set value.
(1) Receive a PAL black and white pattern signal
(including 0% black signal).
(2) Select "2. V/C" from the SERVICE MENU.
(3) Adjust < 7.TWN HI R >(Sub-screen high light red) to
minimize the red noise in the upper half of the sub
(right) screen. (See Fig.9)
NOTE:
If you select an adjustment item < 7. TWN HI R >,
then the screen automatically turns to twin
pictures mode.
(4) Press the [OK] key to memorize the set value.
(5) Adjust < 8.TWN HI B >(Sub-screen high light blue)
to minimize the blue noise in the upper half of the
sub (right) screen. (See Fig.9)
(6) Press the [OK] key to memorize the set value.
(1) Receive a PAL black and white pattern signal
(colour off).
(2) Select "2. V/C" from the SERVICE MENU.
(3) Adjust < 12. TWN CNT > (Sub-screen contrast) to
set the white part in the sub (right) screen to be
white.
NOTE:
If you select an adjustment item < 12.TWN CNT >,
then the screen automatically turns to twin pictures
mode.
(4) Press the [OK] key to memorize the set value.