JVC AV-21E3 Service Manual page 20

AV-21E3
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 optim um condition can be different fr om the initial setting valu es.
Do not change the initial setting values of the setting items not listed in "ADJUSTMENT".
Measuring
Item
instrument
Signal
Ad justment
gener ator
of WHITE
BALANCE
Remote
(Low light) control unit
V/C PAL
1. CUTOFF
50Hz
/ :SELECT
- / + : OPERATE
KEY ASSIGNMENT OF REMOTE CONTROL UNIT
CUT OF F OFF
(H.LINE O FF)
1
CUT OF F ON
(H.LINE O N)
4
R. CUTO FF ( )
▲
R. DRIVE( ▲ )
7
R. CUTO FF ( )
▼
R. DRIVE( )
▼
R
Signal
Ad justment
gener ator
of WHITE
BALANCE
Remote
(High light) control unit
V/C
2. DRIVE
50Hz
/ :SELECT
- / + : OPERATE
20
Test point Ad justment part
1. CUT OFF (R)
CUT OFF (G)
CUT OFF (B)
SCREEN VR
[IN HVT]
(R) * **
(G) * **
(B) * **
DISP : EXIT
2 3
G.CUT OF F(
5 6
B. CUT OFF (
B. DRIVE( ▲
8
9
B. CUT OFF (
B. DRIVE(
G.CUT OF F(
G B
2. DRIVE ( R )
DRIVE (B)
PAL
(R) * **
(B) * **
DISP : EXIT
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 each value to initial s etting value with 4～ 9 keys of the
remote control unit.
1
5. Press the 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.
4 9
7. Use keys ～ of the remote c ontrol 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 horiz ontal line glows
faintly.
2
9. Press the key to turn off the single horizontal line.
10. Press the DISPLAY key twice to return to the normal screen.
)
▲
)
Ad justment item
▲
)
)
) 1. CUT OFF
)
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 set each
value to initial s etting value with 4 and 7 or 6 and 9 keys of the
remote control unit.
4
5. Use the keys and
6. Press the DISPLAY key twice to return to the nomal screen.
Ad justment item
2. DRIVE
No. 52028
Description
Variable Initial setting
range
-128～+127
R
-128～+127
G
-128 ～ +127
B
7 6 9
or and to produc e a white screen
Variable Initial setting
range value
-128 ～ +127
R
-128～+127
B
value
-50
-50
-50
+0
+0