JVC AV-29L6SU Service Manual page 22

Measuring
Item
instrument
TRAPEZIUM Signal
generator
Remote
control unit
UPPER/LOWER Signal
CORNER PIN generator
Remote
control unit
PARALLELOGRAM Signal
(TILT) generator
Remote
control unit
1-22 (No.YA366)
Test point Adjustment part
[4. DEF]
5.TRAPEZ
Parallel
[4. DEF]
7.COR-UP
8.COR-LO
9.COR-UP-S
10.COR-LO-S
Straight
Straight
[4. DEF]
11.ANGLE
Bring the vertical lines straight.
Description
(1) Receive the PAL cross hatch signal.
(2) Set the ZOOM mode to REGULAR.
(3) Select 4. DEF from the SERVICE MODE.
(4) Select < 5.TRAPEZ >.
(5) Set the initial setting value of < 5.TRAPEZ >.
(6) Adjust to bring the vertical lines at the right and left
edges of the screen in parallel.
(7) Press the [OK] key to memorize the set values.
(1) Receive the PAL cross hatch signal.
(2) Set the ZOOM mode to REGULAR.
(3) Select 4. DEF from the SERVICE MODE.
(4) Select < 8. COR-LO >.
(5) Set the initial setting value of < 8. COR-LO >.
(6) Adjust to bring the straight line at the lower corner.
(7) Select < 7. COR-UP >.
(8) Set the initial setting value of < 7. COR-UP >.
(9) Adjust to bring the straight line at the upper corner.
(10) Adjust < 8. COR-LO > and < 7. COR-UP > so that
the vertical lines at the four corners on the screen
are straight.
(11) If the extreme upper & lower corners are little pin or
barrel, chose < 9. COR-UP-S >, < 10. COR-LO-S >
and adjust to get straight.
(12) Press the [OK] key to memorize the set values.
(1) Receive the PAL cross hatch signal.
(2) Set the ZOOM mode to REGULAR.
(3) Select 4. DEF from the SERVICE MODE.
(4) Select < 11. ANGLE >.
(5) Adjust to bring the vertical lines straight.
(6) Press the [OK] key to memorize the set values.