JVC AV-20N83/BK Service Manual page 29

[COMPRESS (16 : 9) : ON, fv: 50Hz mode ]
Measuring
Item
instrument
Adjustment Signal
generator
of
V. HEIGHT
Remote
control unit
Screen size
Screen
size
Adjustment Signal
generator
of
SIDE PIN
Remote
control
unit
Signal
Adjustment
of generator
CORNER
Remote
control unit
Test point Adjustment part
13. V. ZOOM
2. VER. HEIGHT
Vertical
amplitude
7. EW-PIN
Straight
9. UP CORNER
10. DW CORNER
1. Receive a PAL cross-hatch signal of vertical frrequency 50Hz.
2. Select COMPRESS from the MENU and set COMPRESS to ON.
3. Select 3. DEF from the SERVICE MENU.
4. Set the initial setting value of 13. V. ZOOM with the MENU */Tkey.
5. Select 2. VER. HEIGHT with the MENU &/^ key.
6. Set the initial setting value of 2. VER. HEIGHT with the MENU
*/Tkey.
7. Adjust 2. VER. HEIGHT to set the vertical amplitude of the image to
the value shown in Table 3.
Model
AV-20N83 , AV-20N83
/BK
AV-21D83 , AV-21D83
/BK
8. Select 7. EW-PIN with the MENU &/^ key.
9. Set the initial setting value of 7. EW-PIN with the MENU */Tkey.
10. Adjust 7. EW-PIN so that the first vertical lines at the left and right
edges on the screen are straight.
11. Select 9. UP CORNER with the MENU &/^ key.
12. Set the initial setting value of 9. UP CORNER with the MENU
*/Tkey.
13. Select 10. DW CORNER with the MENU &/^ key.
14. Set the initial setting value of 10. DW CORNER with the MENU
*/Tkey.
15. Adjust 9. UP CORNER and 10. DW CORNER so that the vertical
lines at the four corners on the screen are straight.
16. Press the DISPLAY key twice to return to the normal screen.
No. 52076
Description
Vertical Amplitude
230mm
/VT
235mm
/VT
Table 3
AV-20N83
AV-21D83
29