JVC InteriArt LT-26C31BC Service Manual page 45

Measuring
Item
instrument
PAL/SECAM/ Remote control
NTSC unit
SUB-SCREEN
COLOUR Signal generator
Set the red colour of the colour bar to be the deepest.
W Y C G M R
Set the red colour of the colour bar to be the deepest.
W Y C G M R
WHITE Remote control
BALANCE unit
(HIGH LIGHT)
Signal generator
Test point Adjustment part
[2. V/C]
16. TWN COL
(Sub-screen
colour)
B W Y C G M R
Fig.11
B W Y C G M R
Fig.12
[2. V/C]
S13: R GAIN
S15: G GAIN
S17: B GAIN
- SUB-SCREEN PAL COLOUR -
(1) Receive a PAL colour bar signal (full field colour
bar).
(2) Select "2. V/C" from the SERVICE MENU.
(3) Adjust < 16. TWN COL > (Sub-screen colour) to set
the red colour of the colour bar signal in the sub
screen to be the reddest. (See Fig.11)
If noise is not completely deleted, adjust < 16. TWN
COL > so that the red colour has the minimum
noise.
NOTE:
If you select an adjustment item < 16.TWN COL >,
B/W
then the screen automatically turns to twin pictures
(Except red)
mode.
(4) Press the [OK] key to memorize the set value.
COLOUR
(5) Press the [INFORMATION] key twice to the normal
screen.
B
- SUB-SCREEN SECAM COLOUR -
(1) Receive a SECAM colour bar signal (half colour
bar).
(2) Select "2. V/C" from the SERVICE MENU.
(3) Make similar adjustment of SECAM COLOUR in the
same way as for "SUB-SCREEN PAL COLOUR".
(See Fig.12)
- SUB-SCREEN NTSC COLOUR -
(1) Input a NTSC 3.58 composite colour bar signal (full
B/W
field colour bar 75% white).
(Except red)
(2) Select "2. V/C" from the SERVICE MENU.
(3) Make similar adjustment of NTSC COLOUR in the
same way as for "SUB-SCREEN PAL COLOUR".
COLOUR
(See Fig.11)
B (4) Input a NTSC 4.43 composite colour bar signal (full
field colour bar 75% white), and then check the red
colour of the colour bar signal and confirm that there
is no noise or the minimum noise.
(1) Receive a PAL 75% all-white signal.
(2) Set colour temperature to "NORMAL."
(3) Select "2. V/C" from the SERVICE MENU.
(4) Fix one of < S13 > (R GAIN), < S15 > (G GAIN), or
< S17 >(B GAIN). Then, lower the other two that are
not fixed so that the all-white screen is equally white
throughout.
NOTE:
Set one or more of < S13 >, < S15 >, and < S17 >
to 255.
(5) Check that white balance is properly tracked from
low light to high light.
If the white balance tracking is deviated, adjust to
correct it.
(6) Press the [OK] key to memorize the set value.
Description
(No.YA169)1-45