JVC AV-21MS30 Service Manual page 22

Measuring
Item
instrument
V. POSITION Signal
adjustment generator
Remote
control unit
V. HEIGHT Signal
adjustment generator
Remote
control unit
Screen
size
92%
H. POSITION Signal
adjustment generator
Remote
control unit
C
Test point Adjustment part
[4. DEF]
1. V-SHIFT
[4. DEF]
3. V-SIZE
14. V-ZOOM
Picture
size
100%
[4. DEF]
4. H-CENT
D
Description
- PAL V. POSITION -
(1) Receive a PAL circle pattern signal of vertical
frequency 50Hz.
(2) Select 1. V-SHIFT.
(3) Set the initial setting value of 1. V-SHIFT.
(4) Adjust 1. V-SHIFT to make "A = B".
- NTSC V. POSITION -
(1) Receive a NTSC circle pattern signal of vertical
frequency 60Hz.
(2) Make similar adjustment of NTSC V. POSITION in
the same way as for "PAL V. POSITION".
- PAL V. HEIGHT -
(1) Receive a PAL crosshatch signal.
(2) Select 3. V-SIZE.
(3) Set the initial setting value of 3. V-SIZE.
(4) Select 14. V-ZOOM.
(5) Set the initial setting value of 14. V-ZOOM.
(6) Adjust 14. V-ZOOM to make the vertical screen size
to 92% of the picture size.
- NTSC V. HEIGHT -
(1) Receive a NTSC crosshatch signal.
(2) Make similar adjustment of NTSC V. HEIGHT in the
same way as for "PAL V. HEIGHT".
- PAL H. POSITION -
(1) Receive a PAL circle pattern signal.
(2) Select 4. H-CENT.
(3) Set the initial setting value of 4. H-CENT.
(4) Adjust 4. H-CENT to make "C = D".
- NTSC H. POSITION -
(1) Receive a NTSC circle pattern signal.
(2) Make similar adjustment of NTSC H. POSITION in
the same way as for "PAL H. POSITION".
(No.YA328)1-23