JVC AV-28F3SJ, Service Manual

Page: 14 / 23

1-14 (No.YA225)
4.6.4 DEFLECTION CIRCUIT ADJUSTMENT
Item
Measuring
instrument
Test point Adjustment part Description
VERTICAL
POSITION
adjustment Signal
generator
Remote
control unit
030 (REGULAR)
040 (PANORAMIC)
050 (14:9 ZOOM)
060 (16:9 ZOOM)
070 (16:9 ZOOM
SUBTITLE)
110 (FULL)
(1) Receive a PAL circle pattern signal.
(2) Enter the SERVICE MODE.
(3) Select ADJUST MENU.
(4) Select
030 .
(5) Adjust 030 to make A=B .
(6) Check and readjust 030 item if the adjustment
becomes improper after some other geometric
adjustments are done.
(7) Select 040 (PANORAMIC).
(8) Adjust 040 in the same procedure.
(9) Select 050 (14:9 ZOOM).
(10) Adjust 050 in the same procedure.
(11) Select 060 (16:9 ZOOM).
(12) Adjust 060 in the same procedure.
(13) Select 070 (16:9 ZOOM SUBTITLE).
(14) Adjust 070 in the same procedure.
(15) Select 110 (FULL).
(16) Adjust 110 in the same procedure.
VERTICAL
SIZE
adjustment Signal
generator
Remote
control unit
031 (REGULAR)
041 (PANORAMIC)
051 (14:9 ZOOM)
061 (16:9 ZOOM)
071 (16:9 ZOOM
SUBTITLE)
111 (FULL)
(1) Receive a PAL crosshatch signal.
(2) Enter the SERVICE MODE.
(3) Select ADJUST MENU.
(4) Select
031 (REGULAR).
(5) Adjust 031 until horizontal black lines on both the
upper and lower part of the crosshatch pattern
become very closeted the upper and lower
horizontal sides of picture size and nearly about to
disappear.
(6) Check and readjust 031 item if the adjustment
becomes improper after some other geometric
adjustments are done.
(7) Select 041 (PANORAMIC).
(8) Adjust 041 in the same procedure.
(9) Select 051 (14:9 ZOOM).
(10) Adjust 051 in the same procedure.
(11) Select 061 (16:9 ZOOM).
(12) Adjust 061 in the same procedure.
(13) Select 071 (16:9 ZOOM SUBTITLE).
(14) Adjust 071 in the same procedure.
(15) Select 111 (FULL).
(16) Adjust 111 in the same procedure.
A
B
Screen
size
Very close
Very close
Picture
size
100%