1-20 (No.YA061)
4.8.2 FOCUS
Item
Measuring
instrument
Test point
Adjustment part
Description
FOCUS
[AV-32R47SK]
Signal
generator
FOCUS 1 VR
FOCUS 2 VR
[In HVT]
(1) Receive the crosshatch signal.
(2) Set the ZOOM mode to FULL.
(3) By turning the FOCUS 2 VR, adjust the picture so
that the A part vertical line may become thinnest
(Fig.1) .
(4) By turning the FOCUS 1 VR, adjust the picture so
that the A part horizontal line may become uniform
at the line centre and its periphery (Fig.1) .
(5) Make sure that when the screen is darkened, the
lines remain in good focus.
Fig.1
FOCUS
[AV-28R47SK]
Signal
generator
FOCUS VR
[In HVT]
(1) Receive the crosshatch signal.
(2) Set the ZOOM mode to FULL.
(3) While looking at the screen, adjust the FOCUS VR
to the vertical and horizontal lines will be clear and
infine detail.
(4) Make sure that the picture is in focus even when the
screen gets darkened.
FOCUS 2
HVT
SCREEN
FOCUS 1
Vertical
line
Horizontal
line
finest and sharpest
as possible
A
HVT
SCREEN
FOCUS
