JVC AV-32120 Service Manual page 27

ADJUSTMENT OF FOCUS
Measuring
Item
instrument
FOCUS Signal
adjustment generator
ADJUSTMENT OF DEFLECTION CIRCUIT
Measuring
Item
instrument
V.CENTER, Signal
V.SIZE and generator
V.POSITION
adjustment
Screen size
Screen size
90%
Picture size (100%)
H.POSITION Signal
Adjustment generator
Test point Adjustment part
FOCUS VR
[In HVT]
Test point Adjustment part
No.14 V SIZE
No.15 V CENTER
V.CENTER SW
(S1421)
Picture
size
(100%)
No.16 H POSITION
No. 51806
Description
1. Receive a crosshatch signal.
2. While looking at the screen, adjust FOCUS VR so that 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 a crosshatch signal.
2. Make sure that the "No.15 V CENTER" of the PICTURE
SERVICE MODE is 0.
3. Use the LEFT/RIGHT keys of the MENU to set the initial
setting value for the No.14 V SIZE.
4. Adjust the vertical SCREEN size to
SIZE and S1421 (V.CENTER SW).
1. Receive a crosshatch signal.
2. Select the "No.16 H POSITION" of the PICTURE MODE.
3. Set the initial setting value of the "No.16 H POSITION" with the
LEFT/RIGHT key of the MENU.
4. Adjust the "No.16 H POSITION" until the screen will be
horizontally centered.
AV-27GFH
90%
with the No.14 V
23