No. 52025
A
V-20N3
A
V-20NMG3
A
V-20NMG3B
22

VIDEO / CHROM A CIRCUIT ADJUSTMENT

The setting (adjustment) using 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 values.
Do not chang e the init ial settin g value s of the setting it ems not listed in “ADJUSTM ENT”.
Item Measuring
instrument Test point Adjustment part Description
Adju s t men t
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 whit e sign al (c olo ur of f).
2. Enter th e SERVIC E MENU.
3. Select 2. V/C from the SERVICE ME NU, then selec t 1. C UT OFF
(R), (G) and (B) .
4. Set each value to initial setting value with 4～9 keys of the
remote control unit.
5. Pres s the 1 key of the remote control unit to show the single
horizontal line on screen.
6. Tur n t he SCREEN VR fully count er-cloc kwise, then slowly turn it
clockw ise to wh ere one of a red, blu e or gre en colour is faint ly
visible.
7. Use keys 4～9 of the re mote cont rol unit and adjust the othe r 2
colour s which e xcept t he appea red c olour to wher e the sin gle
horizo ntal line app ears whit e.
8. Tur n the SCREEN VR to where th e sing le horizon tal line glows
faintly.
9. Pres s the 2 key to turn of f the sin gle hori zontal line .
10.Press th e DISPLA Y key twic e to return to the n ormal scr een.
Adju s t men t
of WHITE
BALANCE
(High light)
Signal
generator
Remote
control unit
2. DRIVE
(R)
DRIVE (B)
1. Input a blac k an d wh ite si gnal (col our of f) .
2. Enter the SER VICE MENU.
3. Select 2. V/C from th e SERVICE MENU.
4. Select 2. DRIVE (R) / (B) with MENU ▼/▲ key, and set each
value to i nitial s etting val ue with 4 and 7 or 6 and 9 keys of the
remote control unit.
5. Use t he keys 4 and 7 or 6 and
9 to pro duce a whi te sc reen
6. Press the DISPLAY key twice to retu rn to th e nomal scr een.
Adjustment it em Variabl e
range
Initial set ting
value
R-128～+127 -50
G-128～+127 -501. CUT OFF
B -128～+127 -50
Adjustment it em Variabl e
range
Initial set ting
value
R -128～+127 +0
2. DRIVE B-128～+127 +0
V/C PAL
1. CU TO FF
-
/
+ :
O
PERATE DI
S
P : EXIT
(R)
* **
(G)
* **
(B)
* **
50Hz
/ :SELECT
123
456
789
CUTOFF O N
(H.LINE ON)
CUTOFF O F F
(H.LINE OFF)
R. CUTOFF( )
▲
R. DRIVE ( )
R. CUTOFF( )
R. DRIVE ( )
▼
RGB
G.CUTO FF( )
▲
B. CUTOFF( )
▲
B. DRIV E( )
▲
▲
B. CUTOFF( )
B. DRIV E( )
G.CUTO FF( )
▼
▲
▲
▲
KEY ASSIGNMENT OF REMOTE CONTROL UNIT
V/C PAL
2. DRIVE
-
/
+ :
O
PERATE DI
S
P : EXIT
(R)
* **
(
B
)
* **
50Hz
/ :SELECT