JVC AV-29QT4SU Service Manual page 15

Measuring
Item
instrument
HORIZONTAL Signal
SHIFT generator
adjustment
Remote
control unit
C
HORIZONTAL Signal
SIZE generator
adjustment
Remote
control unit
Very
close
BOW Signal
adjustment generator
Remote
control unit
Test point Adjustment part
019 HOR SHIFT
D
018 EW WIDTH
Very
close
Screen size
Picture size 100%
024 HOR BOW
Description
(1) Receive a circle pattern signal.
(2) Enter the SERVICE MODE.
(3) Select HOR SHIFT.
(4) Adjust HOR SHIFT to make C=D.
(5) Check and readjust HOR SHIFT item if the
adjustment becomes improper after some other
geometric adjustments are done.
(1) Receive a crosshatch signal.
(2) Enter the SERVICE MODE.
(3) Select EW WIDTH.
(4) Adjust EW WIDTH until no white bars on both the left
and right sides of the crosshatch will be visible nor
screen will be so wide.
(5) Check and readjust EW WIDTH item if the
adjustment becomes improper after some other
geometric adjustments are done.
(1) Receive a crosshatch signal.
(2) Enter the SERVICE MODE.
(3) Select HOR BOW.
(4) Adjust HOR BOW until the vertical lines become
straight.
(5) Check and readjust HOR BOW item if the
adjustment becomes improper after some other
geometric adjustments are done.
NOTE :
In case where there is a bow-shaped distortion of
images on the screen. (Figure)
(No.YA085C)1-15