Sony KD-28DX51E Service Manual ▷ View online
- 21 -
+
+
+
TLV VR 28"
Deflection Yoke
+
+
+
+
TLV VR 32"
Deflection Yoke
+
+
+
YCH VR 28"
Deflection Yoke
+
+
+
+
YCH VR 32"
Deflection Yoke
Tilt Direction
If you are unable to adjust the corner convergence properly,
this can be corrected with the use of permalloy magnets.
this can be corrected with the use of permalloy magnets.
HTIL correction can be performed by adding one TLH
correction assembly to the Deflection yoke.
correction assembly to the Deflection yoke.
HTIL Adjustment
YCH Adjustment
TLV Adjustment
Geometry Adjustment.
Preparation:
Before starting this adjustment, adjust the horizontal and
vertical static convergence.
vertical static convergence.
1.
Remove the deflection yoke spacer.
2.
Tilt the deflection yoke as indicated in the figure below and
optimise the geometry.
Tilting the DY Up and Down a small amount will balance
the upper and lower pin adjustment.
optimise the geometry.
Tilting the DY Up and Down a small amount will balance
the upper and lower pin adjustment.
3.
Re-install the deflection yoke spacers. Ensure 4 DY spacers are
reinserted
reinserted
Screen Corner Convergence
a
b
d
Permalloy Assy
c
Install the permalloy assembly
for the area that needs correcting.
for the area that needs correcting.
X-4387-214-1
Convergence adjustment with permalloy
APH circuit
harness
harness
Deflection Yoke
TLH Piece
H-Trap
YCH
TLV
Deflection Yoke
TLH Piece
H-Trap
YCH
TLV
4.
The H-Trap and T-B Pin may not achieve a good level due
to a small tilt allowance on the square DY. Keep the DY in
a straight position and adjust H-Trap pot (See diagram for
HTIL Adjustment) and Y-Mg for T-B Pin, as below.
to a small tilt allowance on the square DY. Keep the DY in
a straight position and adjust H-Trap pot (See diagram for
HTIL Adjustment) and Y-Mg for T-B Pin, as below.
28”
32”
• APH Convergence parameter is electrically controlled. For this
reason a TLH piece may not be required.
(APH = Red vertical lines on the edge of the screen).
reason a TLH piece may not be required.
(APH = Red vertical lines on the edge of the screen).
a-d: screen-corner
convergence defect
convergence defect
a
b
c
d
- 22 -
1.
Receive a television broadcast signal.
2.
Normalize the picture setting.
3.
Adjust the focus control located on the flyback transformer
to obtain the best focus at the centre of the screen.
Bring only the centre area of the screen into focus, the
magenta-ring appears on the screen. In this case, adjust the
focus to optimize the screen uniformly.
to obtain the best focus at the centre of the screen.
Bring only the centre area of the screen into focus, the
magenta-ring appears on the screen. In this case, adjust the
focus to optimize the screen uniformly.
3-4. Screen (G2), White Balance
[Adjustment in the service mode using the remote
commander]
commander]
G2 adjustment
Layout of each control
White balance adjustment for TV mode
V.STAT
BMC (Hexapole)
Purity
3-3. Focus Adjustment
Screen
Focus
1.
Input a dot signal from the pattern generator.
2.
Set the Picture, Brightness and Colour to minimum.
3.
Apply 165V DC from an external power supply to the R, G
and B cathodes of the CRT.
and B cathodes of the CRT.
4.
Whilst watching the picture, adjust the G2 control [SCREEN]
located on the flyback transformer to the point just before the
flyback return lines disappear.
located on the flyback transformer to the point just before the
flyback return lines disappear.
1.
Input an all-white signal from the pattern generator.
2.
Set the TV set or operation in Service Mode.
[ See Page 23 ].
[ See Page 23 ].
3.
Select ‘Service’ from the on screen menu display and press
‘Right Arrow’.
‘Right Arrow’.
4.
The ‘Service’ menu will appear on the screen.[See Page 23]
5.
Set the ‘Subcont’ to MAX.
6.
Set the ‘R-Drive’ to 50.
7.
Adjust the ‘G-Drive’ and the ‘B-Drive’ so that the white
balance becomes optimum.
balance becomes optimum.
8.
Press the ‘OK’ button to write the data for each item.
9.
Set the ‘Subcont’ to MIN.
10. Adjust the ‘Cutoff Br.’ with the left and right buttons on the
remote commander so that the white balance becomes optimum.
11. Press the ‘OK’ button to write the data.
- 23 -
4-1. Electrical Adjustments
Service adjustments to this model can be performed using the
supplied remote Commander RM-949.
supplied remote Commander RM-949.
‘TT—’ will appear in the upper right corner of the screen.
Other status information will also be displayed.
Other status information will also be displayed.
3.
Press ‘MENU’ on the remote commander to obtain the following
menu on the screen.
menu on the screen.
4.
Move to the corresponding adjustment item using the
up or down arrow buttons on the Remote Commander.
up or down arrow buttons on the Remote Commander.
5.
Press the right arrow button to enter into the required menu item.
6.
Press the ‘Menu’ button on the Remote Commander to quit the
Service Mode when all adjustments have been completed.
Service Mode when all adjustments have been completed.
Note :
•
After carrying out the service adjustments, to prevent the
customer accessing the ‘Service Menu’ switch the TV set OFF
and then ON.
customer accessing the ‘Service Menu’ switch the TV set OFF
and then ON.
i+
5
+
(ON SCREEN (DIGIT 5) (VOLUME +) (TV)
DISPLAY)
DISPLAY)
SECTION 4
CIRCUIT ADJUSTMENTS
How to enter into the Service Mode
1.
Turn on the main power switch and enter into the stand-by mode.
2.
Press the following sequence of buttons on the Remote
Commander.
Commander.
E
C
I
V
R
E
S
R
-
t
e
s
f
f
O
G
-
t
e
s
f
f
O
e
v
i
r
D
-
R
e
v
i
r
D
-
G
e
v
i
r
D
-
B
q
e
r
F
-
k
a
e
P
y
a
l
e
D
-
a
m
u
L
0
C
S
k
a
e
P
-
e
t
i
h
W
t
n
o
c
b
u
S
t
h
g
i
r
b
u
S
l
o
c
b
u
S
p
r
a
h
s
b
u
S
.
r
B
f
f
o
t
u
C
D
S
O
r
B
T
X
T
r
B
)
3
6
,
0
(
)
3
6
,
0
(
)
3
6
,
0
(
)
3
6
,
0
(
)
3
6
,
0
(
)
3
,
0
(
)
5
1
,
0
(
)
3
,
0
(
)
5
1
,
0
(
)
5
1
,
0
(
)
3
6
,
0
(
)
3
6
,
0
(
)
3
6
,
0
(
)
3
6
,
0
(
)
5
1
,
0
(
)
5
1
,
0
(
j
d
A
j
d
A
1
3
j
d
A
j
d
A
0
8
3
8
3
5
1
8
0
3
j
d
A
5
2
1
3
0
1
7
y
r
t
e
m
o
e
G
e
c
i
v
r
e
S
n
g
i
s
e
D
s
u
t
a
t
S
d
n
u
o
S
t
s
u
j
d
A
F
I
u
n
e
m
r
o
r
r
E
9
0
.
1
v
t
x
e
N
D
2
-
E
F
h
9
6
h
1
0
a
t
a
d
y
r
o
t
c
a
F
G
1
1
4
3
P
S
M
:
e
c
i
v
e
D
P
S
M
U
N
E
M
R
O
R
R
E
2
0
E
3
0
E
4
0
E
5
0
E
6
0
E
7
0
E
8
0
E
9
0
E
0
1
E
1
1
E
2
1
E
3
1
E
4
1
E
G
N
I
K
R
O
W
E
M
I
T
S
R
U
O
H
S
E
T
U
N
I
M
P
C
O
A
/
N
P
V
O
C
N
Y
S
V
R
K
I
C
I
I
M
V
N
E
L
G
N
U
J
R
E
N
U
T
P
D
N
U
O
S
V
8
A
M
M
E
X
E
T
R
O
P
C
T
R
)
5
5
2
,
0
(
)
5
5
2
,
0
(
)
5
5
2
,
0
(
)
5
5
2
,
0
(
)
5
5
2
,
0
(
)
5
5
2
,
0
(
)
5
5
2
,
0
(
)
5
5
2
,
0
(
)
5
5
2
,
0
(
)
5
5
2
,
0
(
)
5
5
2
,
0
(
)
5
5
2
,
0
(
)
5
5
2
,
0
(
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
7
2
2
Y
R
T
E
M
O
E
G
y
t
i
r
a
e
n
i
L
-
V
ll
o
r
c
S
-
V
k
l
B
H
-
t
f
e
L
k
l
B
H
-
t
h
g
i
R
e
l
g
n
A
-
V
w
o
B
-
V
e
r
t
n
e
C
-
H
e
z
i
S
-
H
p
m
A
-
n
i
P
n
i
P
-
r
e
n
r
o
C
-
U
n
i
P
-
r
e
n
r
o
C
-
L
e
s
a
h
P
n
i
P
e
p
o
l
S
-
V
e
z
i
S
-
V
n
o
i
t
c
e
r
r
o
C
-
S
e
r
t
n
e
C
-
V
m
o
o
Z
-
V
a
t
n
e
g
a
M
t
li
T
-
Y
D
)
3
6
,
0
(
)
3
6
,
0
(
)
5
1
,
0
(
)
5
1
,
0
(
)
3
6
,
0
(
)
3
6
,
0
(
)
3
6
,
0
(
)
3
6
,
0
(
)
3
6
,
0
(
)
3
6
,
0
(
)
3
6
,
0
(
)
3
6
,
0
(
)
3
6
,
0
(
)
3
6
,
0
(
)
3
6
,
0
(
)
3
6
,
0
(
)
3
6
,
0
(
)
3
6
,
0
(
)
8
3
,
5
2
(
j
d
A
2
3
0
1
7
j
d
A
j
d
A
j
d
A
j
d
A
j
d
A
j
d
A
j
d
A
j
d
A
0
4
j
d
A
j
d
A
j
d
A
7
2
1
3
1
3
T
S
U
J
D
A
F
I
t
s
u
j
d
A
C
G
A
e
t
u
m
o
t
u
A
n
i
a
G
o
i
d
u
A
g
n
i
t
a
G
L
)
5
1
+
,
6
1
-
(
0
+
1
0
1
1
0
1
- 24 -
Sub Colour Adjustment
1.
Receive a PAL colour bar signal.
2.
Connect an oscilloscope to Pin 5 of CN003 [A Board].
3.
Set the TV set for operation in Service Mode.
[ See Page 23 ].
[ See Page 23 ].
4.
Select ‘Service’ from the on screen menu display and press
‘Right Arrow’.
‘Right Arrow’.
5.
The ‘Service’ menu will appear on the screen.[See Page 23]
6. Adjust the ‘Sub Colour’ so
that the Cyan, Magenta and Blue
colour bars are of equal levels as indicated below.
Same Level
B-Out Waveform
Sub Brightness Adjustment
1.
Input a Monoscope pattern.
2.
Set the TV set or operation in Service Mode. [ See Page 23 ].
3.
Select ‘Service’ from the on screen menu display and press
‘Right Arrow’.
‘Right Arrow’.
4.
The ‘Service’ menu will appear on the screen. [See Page 23].
5.
Adjust the ‘Sub-Brightness’ data so that there is barely a
difference between the 0 IRE and 10 IRE signal levels.
difference between the 0 IRE and 10 IRE signal levels.
1.
Input a video signal that contains a small 100% white area on a
black background.
black background.
2.
Connect an digital voltmeter to Pin 10 of J701 [C Board].
3.
Set the TV set or operation in Service Mode.
[ See Page 23 ].
[ See Page 23 ].
4.
Select ‘Service’ from the on screen menu display and press
‘Right Arrow’.
‘Right Arrow’.
5.
The ‘Service’ menu will appear on the screen.[See Page 23]
6.
Adjust the Sub-Contrast to obtain a voltage of 105 +/- 5V.
Sub Contrast Adjustment
1.
Set the TV set or operation in Service Mode [ See Page 23 ]
and enter into the ‘Geometry’ service menu.
and enter into the ‘Geometry’ service menu.
2.
Select and adjust each item in order to obtain the optimum image.
Deflection System Adjustment
V SIZE
V LIN
AFC BOW
V POSITION
H POSITION
H SIZE
PIN AMP
TRAPEZIUM
UP CORNER PIN
AFC ANGLE
LO CORNER PIN
Y
R
T
E
M
O
E
G
y
t
i
r
a
e
n
i
L
-
V
ll
o
r
c
S
-
V
k
l
B
H
-
t
f
e
L
k
l
B
H
-
t
h
g
i
R
e
l
g
n
A
-
V
w
o
B
-
V
e
r
t
n
e
C
-
H
e
z
i
S
-
H
p
m
A
-
n
i
P
n
i
P
-
r
e
n
r
o
C
-
U
n
i
P
-
r
e
n
r
o
C
-
L
e
s
a
h
P
n
i
P
e
p
o
l
S
-
V
e
z
i
S
-
V
n
o
i
t
c
e
r
r
o
C
-
S
e
r
t
n
e
C
-
V
m
o
o
Z
-
V
a
t
n
e
g
a
M
t
li
T
-
Y
D
)
3
6
,
0
(
)
3
6
,
0
(
)
5
1
,
0
(
)
5
1
,
0
(
)
3
6
,
0
(
)
3
6
,
0
(
)
3
6
,
0
(
)
3
6
,
0
(
)
3
6
,
0
(
)
3
6
,
0
(
)
3
6
,
0
(
)
3
6
,
0
(
)
3
6
,
0
(
)
3
6
,
0
(
)
3
6
,
0
(
)
3
6
,
0
(
)
3
6
,
0
(
)
3
6
,
0
(
)
8
3
,
5
2
(
j
d
A
2
3
0
1
7
j
d
A
j
d
A
j
d
A
j
d
A
j
d
A
j
d
A
j
d
A
j
d
A
0
4
j
d
A
j
d
A
j
d
A
7
2
1
3
1
3
Click on the first or last page to see other KD-28DX51E service manuals if exist.