JVC AV-2586ME Service Manual page 21

4.8.2 TUNER / IF CIRCUIT
Measuring
Item
instrument
DELAY POINT Signal
(AGC) generator
Remote
control unit
Setting Item
NTSC3.58
DELAY POINT
(AGC TAKE-OVER)
OTHER
4.8.3 FOCUS
Measuring
Item
instrument
FOCUS Signal
generator
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)
Measuring
Item
instrument
V. SLOPE Signal
generator
Remote
control unit
Test point Adjustment part
[1. IF]
2. DELAY POINT
(AGC TAKE-OVER)
Initial setting value
Variable range
28
0 - 127
28
Test point Adjustment part
FOCUS VR
[In HVT]
Test point Adjustment part
[4. DEF]
2. V-SLOPE
A
Blanking line
B
Description
(1) Receive a black and white signal (colour off).
(2) Select 1. IF.
(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.
Description
(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.
Description
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.
(No.YA444)1-21