(No.YA465)1-19
4.8.2 TUNER / IF CIRCUIT
4.8.3 FOCUS
4.8.4 DEFLECTION CIRCUIT
• The setting (adjustment) using the remote control unit is made on the basis of the initial setting values.
• The setting values which adjust the screen to the optimum condition can be different from the initial setting values.
• When performing deflection circuit adjustment, adjusts PAL signal (fv: 50 Hz) in 4:3 mode and 16:9 mode respectively, and adjust
the NTSC signal (fv: 60 Hz) similarly.
NOTE:
Proceed to the following adjustment after having completed the adjustments of SUB BRIGHT and SUB PICTURE.
COMPRESS: OFF (4:3)
Item
Measuring
instrument
Test point
Adjustment part
Description
DELAY POINT
(AGC)
Signal
generator
Remote
control unit
[1. IF]
2. DELAY POINT
(AGC TAKE-OVER)
(1) Receive a black and white signal (colour off).
(2) Select 1. IF from the SERVICE MODE
(3) Select
<2. DELAY POINT>
.
(4) Set the setting values of the setting items as shown
bellow table.
(5) Then adjust the
[MENU - / +]
keys until video noise
disappears.
(6) Turn to other channels and make sure that there are
no irregularities.
Setting Item
Variable range
Initial setting value
28
28
DELAY POINT
(AGC TAKE-OVER)
0 - 127
NTSC3.58
OTHER
Item
Measuring
instrument
Test point
Adjustment part
Description
FOCUS
Signal
generator
FOCUS VR
[In HVT]
(1) Receive the cross hatch signal.
(2) While looking at the screen, adjust the
FOCUS VR
to the vertical and horizontal lines will be thinnest
and sharpest.
(3) Make sure that the picture is in focus even when the
screen gets darkened.
Item
Measuring
instrument
Test point
Adjustment part
Description
V. SLOPE
Signal
generator
Remote
control unit
[4. DEF]
2. V-SLOPE
PAL V. SLOPE
(1) Receive a circle pattern signal of vertical frequency
50Hz (PAL).
(2) Select
4. DEF
from the SERVICE MODE.
(3) Select
<2. V-SLOPE>
.
(4) Set the initial setting value of
<2. V-SLOPE>
.
(5) Adjust
<2. V-SLOPE>
to make "
A = B
".
(6) Press the
[OK]
key to memorize the set values.
NTSC V. SLOPE
(1) Receive a circle pattern signal of vertical frequency
60Hz (NTSC).
(2) Follow the same step 2 to 6 as in PAL V. SLOPE.
B
A
Blanking line
