JVC AV-21MS30 Service Manual page 23

Measuring
Item
instrument
V.LINEARITY Signal
adjustment generator
Remote
control unit
H. PARALLEL Signal
adjustment generator
Remote
control unit
H. BOW Signal
adjustment generator
Remote
control unit
1-24 (No.YA328)
Test point Adjustment part
[4. DEF]
12. V-S. CR
13. V-LIN
TOP
CENTRE
BOTTOM
[4.DEF]
10. ANGLE
Parallel
[4.DEF]
11. BOW
Straight
Description
- PAL V. LINEARITY -
(1) Receive a PAL crosshatch signal.
(2) Select 12. V-S.CR.
(3) Set the initial setting value of 12. V-S. CR.
(4) Select 13. V-LIN.
(5) Set the initial setting value of 13. V-LIN.
(6) Adjust 12. V-S. CR and 13. V-LIN so that the spaces
of each line on TOP, CENTRE and BOTTOM
become uniform.
- NTSC V. LINEARITY -
(1) Receive a NTSC crosshatch signal.
(2) Make similar adjustment of NTSC V-S. CR in the
same way as for "PAL V-S. CR".
- PAL H. PARALLEL -
(1) Receive a PAL crosshatch signal.
(2) Select 10. ANGLE.
(3) Set the initial setting value of 10. ANGLE.
(4) Adjust 10. ANGLE to optimize the trapezium
distortion at the centre of the screen.
- NTSC H. PARALLEL -
(1) Receive a NTSC crosshatch signal.
(2) Make similar adjustment of NTSC H. PARALLEL in
the same way as for "PAL H. PARALLEL".
- PAL H. BOW -
(1) Receive a PAL crosshatch signal.
(2) Select 11. BOW.
(3) Set the initial setting value of 11. BOW.
(4) Adjust 11. BOW to optimize the horizontal arc
distortion.
- NTSC H. BOW -
(1) Receive a NTSC crosshatch signal.
(2) Make similar adjustment of NTSC H. BOW in the
same way as for "PAL H. BOW".
(3) Press the [DISPLAY] key twice to return to the
normal screen.