JVC DEFLECTION CI RCUIT ADJUSTMENT

No. 52025
A
V-20N
3
A
V-20NMG3
A
V-20NMG3B
27
DEFLECTION CI RCUIT ADJUSTMENT
" T here ar e 2 m odes of adjus tment (sett ing v alue) --- --- ① 50 Hz m ode an d ② 6 0Hz m ode - ---- depe nding u pon t he kind of sig nals
(vertic al fr eque ncy 5 0Hz / 60Hz) .
" W hen ad juste d in mod e ① , mode ② will be automatically set.
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.
Item Measuring
instrument Test point Adjustment part Description
Adju s t men t
of
V.HEIGHT
&
V.POSITI ON
Signal
generator
Remote
control unit
1. VER. POSITION
3. VE R. HEIG HT
1. Input a ci rcle patt ern signal .
2. Enter the SER VICE MENU.
3. Select 3. DEF. from SERVICE MENU.
4. Select 1. VER. POSITI ON with the MENU ▼/▲ key.
5. Set the initial setting value with the MENU - / + key.
6. Adjust V and V’ t o be eq ual with t he MENU - / + key as show n in
Fig.2.
7. Input a cr oss -hatch sign al.
8. Select 3. V. HEIG HT with the MENU ▼/▲ key.
9. Set the initial setting value with the MENU - / + key.
10. As show n i n Fig .1, a dju st VE R. HEI GHT and m ak e the verti cal
screen size 92% of the pi ctur e siz e with t he MEN U - / + ke ys of
remote control unit.
Adju s t men t
of
HOR.
POSITION
Signal
generator
Remote
control unit
2.HOR. POSITION 11. Input a circle p attern si gnal.
12. Select 2. HOR POS ITION with the MENU ▼/▲ key.
13. Set the initi al setting value of 2. H OR. POSITION with the
MENU - / + key.
14. Adjust 2. HOR. POSITION to make H=H" as shown in Fig.2
with the MENU - / + ke y.
Screen size
Picture size 1 00%
Screen
size
92%
Picture
size
100%
Fig.1
HH"
Fi
g
.2
V
V'
DEF
- / + : OPERATE DISP : EXIT
***
SUB M ENU 3. D EF
/ :SELECT
50Hz
1. VER. POSITION
PAL