JVC AV-25MT35/P Service Manual page 25

Measuring
Item
instrument
V.LINEARITY Signal
adjustment generator
Remote
control unit
CORNER PIN Signal
adjustment generator
Remote
control unit
H. PARALLEL Signal
adjustment generator
Remote
control unit
Test point Adjustment part
[4. DEF]
12. V-S. CR
13. V-LIN
TOP
CENTRE
BOTTOM
[4. DEF]
8. COR-UP
9. COR-LO
Straigt
[4.DEF]
10. ANGLE
Parallel
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 CORNER PIN -
(1) Receive a PAL crosshatch signal.
(2) Select 8. COR-UP.
(3) Set the initial setting value of 8. COR-UP.
(4) Select 9. COR-LO.
(5) Set the initial setting value of 9. COR-LO.
(6) Adjust 8. COR-UP and 9. COR-LO so that the
vertical lines at the four corners on the screen are
straight.
- NTSC CORNER PIN -
(1) Receive a NTSC crosshatch signal.
(2) Make similar adjustment of NTSC CORNER in the
same way as for "PAL CORNER".
- 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".
(No.YA275)1-25