JVC AV-20D304/SA Service Manual page 19

AV-20D304
3.6.4 FOCUS
Measuring
Item
instrument
FOCUS Signal
generator
3.6.5 DEFLECTION CIRCUIT
Measuring
Item
instrument
V. SIZE & Signal
V. CENTER generator
Remote
control unit
Screen
size
(90%)
No Setting item
S03 V SIZE
H. CENTER Signal
generator
Remote
control unit
No Setting item
D02 H POSI
1-18 (No.52103)
Test point Adjustment part
FOCUS VR
[In HVT]
Test point Adjustment part
[2.DEF(D)]
D03 : V SIZE
V. CENTER SW(S401)
[MAIN PWB]
Picture
size
(100%)
Variable Initial setting
range value
0~125 65
[2.DEF(D)]
D02 : H POSI
Variable Initial setting
range value
0~31 10
Description
(1) Receive the crosshatch signal.
(2) While looking at the screen, adjust the FOCUS VR
to the vertical and horizontal lines will be clear and in
fine detail.
(3) Make sure that the picture is in focus even when the
screen gets darkened.
Description
(1) Receive the crosshatch signal.
(2) Select the <D03>(V SIZE).
(3) Adjust the <D03> so that the vertical screen size
becomes 90%.
(4) Adjust the V' CENTER SW to agree the vertical cen-
ter with display center.
(1) Receive the crosshatch signal.
(2) Select <D02>(H POSI).
(3) Adjust the <D02> so that left width and right width of
the crosshatch screen becomes equal.