JVC AV-21F1P, Service Manual

Page: 19 / 40

AV-21F1P
No. 56033 18
VIDEO/CHROMA CIRCUIT ADJUSTMENT
The setting (adjustment) using the remote control unit is made on the basis of the initial setting values shown on pages 14 and
15.
The setting values which adjust the screen to the optimum condition can be different from the initial setting values.
●
Do not change the initial setting values of the setting (adjustment) items not listed herein.
Measuring
Item Test point Adjustment part
instrument
Adjustment
●
Signal BRIGHT
of WHITE generator
BALANCE R CUTOFF
(Low light)
●
Remote G CUTOFF
control B CUTOFF
unit
SCREEN VR
(In HVT)
Adjustment
●
Signal G DRIVE
of WHITE generator B DRIVE
BALANCE
(High light)
●
Remote
control
unit
Description
1. Receive a black and white signal (color off).
2. Select the sub menu screen LOW LIGHT from the SERVICE
MENU.
3. Confirm that the value of BRIGHT, R CUTOFF, G CUTOFF,
and B CUTOFF is set to the initial setting value.
4. Press the 1 key on the remote control unit to produce a single
horizontal line.
5. Turn the SCREEN VR fully counterclockwise, then slowly turn
it clockwise to where a red, blue, or green color is faintly vis-
ible.
6. Use keys 4 ~ 9 on the remote control unit and adjust the other
2 colors to where the single horizontal line becomes white.
7. Turn the SCREEN VR to where the single horizontal line glows
faintly.
8. Press the 2 key to stop producing a single horizontal line.
NOTE: The key 3 acts in the same way as the EXIT key.
1. Receive a black and white signal (color off).
2. Select the sub menu screen HIGH LIGHT from the SERVICE
MENU.
3. Confirm that the value of G DRIVE and B DRIVE is set to the
initial setting value.
4. Use the keys 5 and 8 or 6 and 9 to produce a white screen.
NOTE: The key 3 acts in the same way as the EXIT key.
BRIGHT
✽✽✽
✽✽✽ ✽✽✽ ✽✽✽
BRIGHT
EXIT BY
IT EXIT
SUB MENU: LOW LIGHT
BRIGHT
B CUTOFF
G CUTOFF
R CUTOFF
B DRIVE
HIGH LIGHT
✽✽✽ ✽✽✽
EXIT BY
IT
EXIT
SUB MENU: HIGH LIGHT
G DRIVE
R. DRIVE ( )
R. DRIVE ( )
B. DRIVE ( )
B. DRIVE ( )
REMOTE CONTROL UNIT
1 2 3
4
7 8 9
5 6
R. CUTOFF ( )
G. CUTOFF ( )
H.LINE OFF
H.LINE ON
1 2 3
4
7 8 9
5 6
R. CUTOFF ( )
G. CUTOFF ( )
B. CUTOFF ( )
B. CUTOFF ( )
REMOTE CONTROL UNIT
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