Rg b, Video / chroma circuit adjustment – JVC AV-20NMG3 EN User Manual
Page 22
No. 52025
AV-20N3
AV-20NMG3
AV-20NMG3B
22
VIDEO / CHROMA CIRCUIT ADJUSTMENT
The setting (adjustment) usin g the REMOTE CONTROL UNIT is made on the basis of the initial setting values.
The setting values which adjust the screen to the optimum condition can be different from the initial setting valu es.
Do not change the initial setting values of the setting items not listed in “ADJUSTMENT”.
Item
Measuring
instrument
Test point
Ad justment part
Description
Ad justment
of WHITE
BALANCE
(Low light)
Signal
generator
Remote
control unit
1. CUT
OFF
(R)
CUT OFF (G)
CUT OFF (B)
SCREEN VR
[IN HVT]
1. Input a blac k and white signal (colour off).
2. Enter the SERVICE MENU.
3. Select 2. V/C from the SERVICE MENU, then selec t 1. CUT OFF
(R), (G) and (B) .
4. Set eac h value to initial setting value with 4～ 9 keys of the
remote control unit.
5. Press the
1
key of the remote control unit to show the single
horizontal line on screen.
6. Turn the SCREEN VR fully counter-cloc kwise, then slowly turn it
clockwis e to where one of a red, blue or green colour is faintly
vis ible.
7. Use keys
4
～
9
of the remote control unit and adjust the other 2
colours which except the appeared colour to where the single
horizontal line appears white.
8. Turn the SCREEN VR to where the single horizontal line glows
faintly.
9. Press the
2
key to turn off the single horizontal line.
10.Press the DISPLAY key twic e to return to the normal screen.
Ad justment
of WHITE
BALANCE
(High light)
Signal
generator
Remote
control unit
2. DRIVE
(R)
DRIVE (B)
1. Input a blac k and white signal (colour off).
2. Enter the SERVICE MENU.
3. Select 2. V/C from the SERVICE MENU.
4. Select 2. DRIVE (R) / (B) with MENU ▼/▲ key, and s et each
value to initial s etting value with 4 and 7 or 6 and 9 keys of the
remote control unit.
5. Use the keys
4
and
7
or
6
and
9
to produc e a white screen
6. Press the DISPLAY key twice to return to the nomal screen.
Ad justment item
Variable
range
Initial setting
value
R
-128～+127
-50
G
-128～+127
-50
1. CUT OFF
B
-128～+127
-50
Ad justment item
Variable
range
Initial setting
value
R
-128～+127
+0
2. DRIVE
B
-128～+127
+0
V/C PAL
1. CUTOFF
- / + : OPERATE DISP : EXIT
(R) * **
(G) * **
(B) * **
50Hz
/ :SELECT
1
2
3
4
5
6
7
8
9
CUTOFF ON
(H.LINE ON)
CUTOFF OFF
(H.LINE OFF)
R. CUTOFF( )
▲
R. DRIVE( )
R. CUTOFF( )
R. DRIVE( )
▼
R
G
B
G.CUTOFF( )
▲
B. CUTOFF( )
▲
B. DRIVE( )
▲
▲
B. CUTOFF( )
B. DRIVE( )
G.CUTOFF( )
▼
▲
▲
▲
KEY ASSIGNMENT OF REMOTE CONTROL UNIT
V/C PAL
2. DRIVE
- / + : OPERATE DISP : EXIT
(R) * **
(B) * **
50Hz
/ :SELECT