JVC AV-28KT1SUF/D, Руководство по обслуживанию

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(No.52137D)1-15
4.7.3 DEFLECTION CIRCUIT ADJUSTMENT
Item
Measuring
instrument
Test point Adjustment part Description
VERTICAL
SHIFT
adjustment Signal
generator
Remote
control unit
013 VERT SHIFT (1) Receive a circle pattern signal.
(2) Enter the SERVICE MODE.
(3) Select
VERT SHIFT .
(4) Adjust VERT SHIFT to make A=B .
(5) Check and readjust VERT SHIFT item if the
adjustment becomes improper after some other
geometric adjustments are done.
VERTICAL
SIZE
adjustment Signal
generator
Remote
control unit
014 VERT AMP (1) Receive a crosshatch signal.
(2) Enter the SERVICE MODE.
(3) Select
VERT AMP .
(4) Adjust VERT AMP until horizontal black lines on
both the upper and lower part of the crosshatch
pattern become very close to the upper and lower
horizontal sides of picture size and nearly about to
disappear.
(5) Check and readjust VERT AMP item if the
adjustment becomes improper after some other
geometric adjustments are done.
VERTICAL
S-CORRECTION
& LINEARITY
adjustment Signal
generator
Remote
control unit
015 SCORRECTION
017 V-LINEARITY
(1) Receive a crosshatch signal.
(2) Enter the SERVICE MODE.
(3) Select
SCORRECTION .
(4) Adjust SCORRECTION until the size of squares on
both the upper and lower part of crosshatch pattern
become equal to the squares laying on the vertical
centre of the crosshatch pattern.
(5) Check and readjust SCORRECTION item if the
adjustment becomes improper after some other
geometric adjustments are done.
(6) Select V-LINEARITY .
(7) Adjust V-LINEARITY until all the size of squares of
the crosshatch pattern become in equal size from
the top of the screen to its bottom of the whole
screen.
(8) Check and readjust V-LINEARITY item if the
adjustment becomes improper after some other
geometric adjustments (especially after than
SCORRECTION adjustment) are done.
A
B
Screen
size
Very close
Very close
Picture
size
100%
UPPER
CENTRE
LOWER