JVC AV-21L41/BK Service Manual page 23

AV-21L41
DEFLECTION CIRCUIT ADJUSTMENT
" There are 2 modes of adjustment (setting value) ------ ① 50Hz mode and ② 60Hz mode ----- depending upon the kind of signals
(vertical frequency 50Hz / 60Hz).
" When adjusted in mode 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.
Measuring
Item
instrument
Signal
Adjustment
generator
of# # # # V.HEIGHT
&
Remote
V.POSITION control unit
SUB MENU 3. DEF
DEF
1. VER. POSITION
50Hz
/ :SELECT
- / + : OPERATE
Screen size
Screen
size
92%
Picture size 100%
Signal
Adjustment
generator
of# # # # HOR.
POSITION
Remote
control unit
H
26
Test point Adjustment part
1. VER. POSITION
3. VER. HEIGHT
PAL
***
DISP : EXIT
Picture
size
100%
Fig.1
2.HOR. POSITION
H"
V
V'
Fig.2
1. Input a circle pattern signal.
2. Select 3. DEF. from SERVICE MENU.
3. Select 1. VER. POSITION with the MENU ▼ / ▲ key.
4. Set the initial setting value with the MENU - / + key.
5. Adjust V and V' to be equal with the MENU - / + key as shown
in Fig.2.
6. Input a cross-hatch signal.
7. Select 3. V. HEIGHT with the MENU ▼ / ▲ key.
8. Set the initial setting value with the MENU - / + key.
9. As shown in Fig.1, adjust VER. HEIGHT and make the vertical
92%
screen size of the picture size with the MENU - / + keys of
remote control unit.
10. Input a circle pattern signal.
11. Select 2. HOR POSITION with the MENU ▼ / ▲ key.
12. Set the initial setting value of 2. HOR. POSITION with the
MENU - / + key.
13. Adjust 2. HOR. POSITION to make H=H" as shown in Fig.2
with the MENU - / + key.
No. 51859
Description