JVC InteriArt AV-21VT16/P Service Manual page 24

4.8.5 VIDEO CIRCUIT
Measuring
Item
instrument
WHITE Signal
BALANCE generator
(Low light)
Remote
control unit
REMOTE CONTROL UNIT
B CUTOFF ( )
B CUTOFF ( )
WHITE Signal
BALANCE generator
(High light)
Remote
control unit
REMOTE CONTROL UNIT
R DRIVE ( )
R DRIVE ( )
SUB BRIGHT Remote
control unit
SUB Remote
CONTRAST control unit
1-24 (No.YA453)
Test point Adjustment part
[2. V/C]
2. CUTOFF (B)
2. CUTOFF (G)
SCREEN VR
[In HVT]
1 2 3
G CUTOFF (
4 5 6
7 8 9
G CUTOFF (
[2. V/C]
3. WDR (R)
3. WDR (G)
3. WDR (B)
1 2 3
G DRIVE ( )
4 5 6
B DRIVE ( )
7 8 9
B DRIVE ( )
G DRIVE ( )
[2. V/C]
4. BRIGHT
[2. V/C]
5. CONT
COMPOSITE WHITE BALANCE
(1) Receive a PAL black and white signal (COLOR off).
(2) Set the PICTURE MODE to BRIGHT.
(3) Select 2. V/C from the SERVICE MODE.
(4) Select <2. CUTOFF> (B) and (G).
(5) Set each value to initial setting value with the [4] / [7]
keys and [5] / [8] keys.
(6) Turn the SCREEN VR fully counterclockwise, then
slowly turn it clockwise to where a red, blue or green
COLOR is faintly visible.
(7) Use the [4] / [7] and [5] / [8] keys to adjust so that
the other 2 COLORs appear white.
)
(8) Turn the SCREEN VR to where the single horizontal
line glows faintly.
(9) Press the [OK] key to memorize the set values.
COMPONENT WHITE BALANCE
(1) Receive a PAL component black and white signal
)
(COLOR off).
(2) Select VIDEO-2 SET from the MENU and set
VIDEO-2 SET to COMPONENT.
(3) Adjust COMPONENT WHITE BALANCE in the
same way as "COMPOSITE WHITE BALANCE".
(1) Receive a PAL black and white signal (COLOR off).
(2) Set the PICTURE MODE to BRIGHT.
(3) Select 2. V/C from the SERVICE MODE.
(4) Select <3. WDR> (R), (G) and (B).
(5) Set each value to initial setting value with the [4] to
[9] keys.
(6) Use the [4] to [9] keys to produce a white screen.
(7) Press the [OK] key to memorize the set values.
(1) Receive a NTSC broadcast.
(2) Set the PICTURE MODE to BRIGHT.
(3) Select 2. V/C from the SERVICE MODE.
(4) Select <4. BRIGHT>.
(5) Set the initial setting value of <4. BRIGHT>.
(6) If the brightness is not best with the initial setting value,
make fine adjustment until you get the best brightness.
(7) Press the [OK] key to memorize the set values.
(1) Receive a NTSC broadcast.
(2) Set the PICTURE MODE to BRIGHT.
(3) Select 2. V/C from the SERVICE MODE.
(4) Select <5. CONT>.
(5) Set the initial setting value of <5. CONT>.
(6) If the contrast is not best with the initial setting value,
make fine adjustment until you get the best contrast.
(7) Press the [OK] key to memorize the set values.
Description