JVC AV-2956BE Service Manual page 23

Measuring
Item
instrument
V.LINEARITY Signal
generator
Remote
control unit
CORNER PIN Signal
generator
Remote
control unit
H. PARALLEL Signal
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 4. DEF from the SERVICE MODE.
(3) Select <12. V-S.CR>.
(4) Set the initial setting value of <12. V-S. CR>.
(5) Select <13. V-LIN>.
(6) Set the initial setting value of <13. V-LIN>.
(7) Adjust <12. V-S. CR> and <13. V-LIN> so that the
spaces of each line on TOP, CENTRE and
BOTTOM become uniform.
(8) Press the [OK] key to memorize the set values.
NTSC V. LINEARITY
(1) Receive a NTSC crosshatch signal.
(2) Follow the same step 2 to 8 as in PAL V-S. CR.
PAL CORNER PIN
(1) Receive a PAL crosshatch signal.
(2) Select 4. DEF from the SERVICE MODE.
(3) Select <8. COR-UP>.
(4) Set the initial setting value of <8. COR-UP>.
(5) Select <9. COR-LO>.
(6) Set the initial setting value of <9. COR-LO>.
(7) Adjust <8. COR-UP> and <9. COR-LO> so that the
vertical lines at the four corners on the screen are
straight.
(8) Press the [OK] key to memorize the set values.
NTSC CORNER PIN
(1) Receive a NTSC crosshatch signal.
(2) Follow the same step 2 to 8 as in PAL CORNER.
PAL H. PARALLEL
(1) Receive a PAL crosshatch signal.
(2) Select 4. DEF from the SERVICE MODE.
(3) Select <10. ANGLE>.
(4) Set the initial setting value of <10. ANGLE>.
(5) Adjust <10. ANGLE> to optimize the trapezium
distortion at the centre of the screen.
(6) Press the [OK] key to memorize the set values.
NTSC H. PARALLEL
(1) Receive a NTSC crosshatch signal.
(2) Follow the same step 2 to 6 as in PAL H.
PARALLEL.
(No.YA466)1-23