LG Lafinion 55, Service Manual

Page: 5 / 19

6. Rotate the 6-Pole magnets keeping the angle between
two 6-Pole magnets until horizontal Red and Blue lines
are unified.
(4) Dynamic Convergence (DYC) Adjustment
1. Vertical Line Adjustment : Adjust by moving DY right and
left.
2. Horizontal Line Adjustment : Adjust by moving DY up
and down.
6. White Balance Adjustment
6.1 Test Equipment
(1) Automatic White Balance meter(Can generate Low/High
light pattern)
(2) White Balance meter(CRT color Analyzer, CA-100)
(3) SVC Remote control for adjustment
6.2 Preliminary steps
Do screen adjustment first.
6.3 Adjustment
(1) White Balance should be adjusted with the SVC remote
control.
(2) Enter into adjustment mode by “INSTART” button.
(3) Adjust the item with CH
D
,
E
.
(4) Adjust the data with VOL
F
,
G
.
(5) Adjustment Procedure
1. Adjust “CONTRAST” and “BRIGHT” so the bright level to
be 35Ft_L.
2. Select G-DRIVE(SUB 7) and adjust Y coordinate in High
Light and select B-DRIVE(SUB 8) and adjust X
coordinate so the color coordinates in High light as to
be the values in Table below.
3. Adjust “CONTRAST” and “BRIGHT” so the bright level to
be 4.5Ft_L.
4. Select G-CUT(SUB 5) and adjust Y coordinate in Low
Light and select B-CUT(SUB 6) and adjust X coordinate
so the color coordinates in Low light as to be the values
in Table below.
5. Repeat 1 ~ 4 until the color coordinates in High and
Low color satisfies the Table.
6. Check the adjusted color coordinates with the white
balance meter.
7. Focus Voltage Adjustment
Adjust after operating the receiver enough.
7.1 Preliminary steps
(1) Receive Digital Pattern.
(2) Set Picture condition to “CLEAR”.
7.2 Adjustment
Adjust center focus with upper Focus volume and adjust
corner focus with lower Focus volume.
Repeatedly adjust focus until getting proper focus.
8. Sub-Brightness Adjustment
Do white balance adjustment first.
8.1 Preliminary steps
(1) Receive Mono Scope.
(2) Set Picture condition to “CLEAR”.
8.2 Adjustment
(1) Select “SUB BRI” mode pressing “ADJ” button on the SVC
Remote control.
(2) Adjust until number “2” almost disappears on Gray Scale
of Mono Scope signal by VOL
F
,
G
key.
Adjust 21” FLAT Model until number “3” almost disappears.
9. Sub-Tint Adjustment
This adjustment must be done when the TINT is on.
(1) Receive SMPTE.
(2) Select the TINT adjustment mode(Sub-Tint) with the ADJ
key(or SVC key).
(3) Adjust the up and down cyan color same with VOL
F
,
G
key.
- 5 -
Location
C
L,R,X,Y
A,B,D,E
3,6,9,12
2,4,8,10
Convergence
Colors : R/B, R/G, B/G <Unit : mm>
*
Each indicator stands
for the 30ø circle.
O
Adjust after warming
the Braun tube up for
15 minutes.
O
Adjustment position is
the center of the circle
above.
O
The specification of
horizontal and vertical
direction is equal
10 12 2
A X B
9 L C R 3
D Y E
8 6 4
Condition Specification Content
Colors
Colors
Colors
Colors
Colors
14”
-
0.8
0.8
1.0
1.4
15”
-
0.8
0.8
1.0
1.4
20”
-
0.8
0.8
1.0
1.4
21”
-
0.8
0.8
1.0
1.4
Color
temperature
13,000
¡
800
MPCD
¡
10
X Coordinate
0.266
¡
0.008
Y Coordinate
0.282
¡
0.008
0 1 2 3 4 5 6 7 8 9
MONO SCOPE
F
GRAY SCALE
F
COLOR BAR