JVC AV-56P776 Service Manual page 45

Measuring
Item
instrument
OVERALL Signal
CONVERGENCE generator
(POINT)
adjustment Remote
control unit
B4
B3
B2
B1
H#0 H#1 H#2
V#0
V#1
V#2
V#3
V#4
V#5
V#6
V#7
V#8
Area C Area D
A1
48" model 174 348
56" model 204 407
1-44 (No.YA318)
Test point Adjustment part
[ 7.CONVER B ]
A4
A3
A2
Cursor Point of adjustment
A1
Fig.1
H#3 H#4 H#5 H#6 H#7 H#8
H H # # # #4 : 0 : 0 : 0 V#4 : 0 V#4 : V#4 :
Area A
Area B
Fig.2
A2 A3 A4 B1 B2
435 522 82 164
509 611 96 192
SPAN TABLE (mm)
NOTE:
Perform this adjustment after performing OVERALL
CONVERGENCE (LINE) check.
It adjusts displaying and checking adjustment data by
the [DISPLAY] key. Adjust in order of area A, area B,
area C and area D.
(1) Receive NTSC crosshatch signal.
(2) Select 7.CONVER B from SERVICE MENU. Then
appear green crosshatch pattern for adjustment.
(See Fig.1)
(3) Press [DISPLAY] key for displaying and checking
adjustment data.
(4) Press [ 2 ] / [ 4 ] / [ 5 ] / [ 6 ] / [ 8 ] keys respectively,
move the cursor to the adjusting point.
(5) Press [CH+] / [CH-] / [VOL+] / [VOL-] keys, adjust the
position of the adjusting point so that it is located at
the place as shown in Fig.2.
(6) Adjust area A.
(7) Adjust area B.
(8) Adjust area C.
(9) Adjust area D. It adjusts toward an outside from the
inside of a screen. (e.g. H#3 > H#2 > ---)
H#0 is fixed data with the value inputted by
adjustment of area C. When the point of H#0 needs
to be adjusted, adjusts the data of H#1 and H#2.
If the data of H#1 adjusts H#0, H#2 will move, the
data of H#2 adjusts H#1 and H#2. It repeats if
needed. (See Fig.3)
(10) Press [SLEEP TIMER] key to select the red and blue
crosshatch
convergence adjustments so that they align with the
adjusting points of the green crosshatch pattern
(reference color).
B3 B3
(11) Press [OK] key to change the display colors to 3
246 287
colors from 2 colors (adjusting color + green) and
287 335
make sure that the convergence has been aligned
with each other.
(12) Press [MUTING] key to memorize the set values.
(13) Perform an AUTO CONVERGENCE PRESET.
ADJUSTMENT PROCEDURE OF LINE H#1
H#0H#1
NOTE:
Adjust in consideration of a surrounding line moving.
Description
patterns, respectively,
H#2 H#0H#1 H#2
Fig.3
and make
H#0H#1 H#2