Deflection Circuit Adjustment - JVC AV-21DMT3 Service Manual

DEFLECTION CIRCUIT ADJUSTMENT

" There are 2 modes of adjustment (s etting value) ------ ① 50Hz mode and ② 60Hz mode ----- depending upon the kind of s ignals
(vertic al frequency 50Hz / 60Hz).
" When adjusted in mode ① , mode ② will be automatically s et.
The setting (adjustmen t) 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 differ ent fr om the initial settin g values.
Measuring
Item
instrument
Ad justment Signal
gener ator
of V.HEIGHT
&
Remote
V.POSITION control unit
SUB MENU 3. DEF
DEF
1. VER. POSITION
50Hz
/ :SELECT
- / + : OPERATE
Scre en size
Scre en
size
92%
Picture size 1 00%
Ad justment Signal
gener ator
of HOR.
POSITION
Remote
control unit
H
Test point Ad justment part
1. VER. POSITION
3. VER. HEIGHT
PAL
***
DISP : EXIT
Picture
size
10 0%
Fig.1
2.HOR. POSITION
H"
V
V'
Fig.2
1. Input a circle pattern signal.
2. Enter the SERVICE MENU.
3. Select 3. DEF. from SERVICE MENU.
4. Select 1. VER. POSITION with the MENU ▼ / ▲ key.
5. Set the initial setting value with the MENU - / + key.
6. Adjust V and V' to be equal with the MENU - / + key as shown in
Fig.2.
7. Input a cross -hatch signal.
8. Select 3. V. HEIGHT with the MENU ▼ / ▲ key.
9. Set the initial setting value with the MENU - / + key.
10. As shown in Fig.1, adjust VER. HEIGHT and mak e the vertical
92%
screen size of the picture size with the MENU - / + keys of
remote control unit.
11. Input a circle pattern signal.
12. Select 2. HOR POSITION with the MENU ▼ / ▲ key.
13. Set the initial setting value of 2. HOR. POSITION with the
MENU - / + key.
14. Adjust 2. HOR. POSIT ION to make H=H" as shown in Fig.2
with the MENU - / + key.
No. 52023
AV-21DMT3/AV-21D3
AV-2135TEE/AV-2135EE
AV-21DMG3
Description
27