Sony KV-28EW20B Service Manual ▷ View online
- 30 -
A
B
C
D
E
F
G
H
I
J
K
L
M
N
1
2
3
4
5
6
7
8
9
10
11
O
P
Q
R
S
T
U
V
W
12
13
14
15
16
~ A Board Schematic Diagram [ Power Supply, Deflection, Small Signal Board, Audio Amp ] page 2/2 ~
A
B
C
D
E
F
G
H
I
J
K
L
M
N
1
2
3
4
5
6
7
8
9
10
11
- 31 -
NOTE:
Portions of the circuit marked as shown are high
voltage areas. Use care to prevent electric shock
during inspection or repair.
voltage areas. Use care to prevent electric shock
during inspection or repair.
~ A Printed Wiring Board Conductor side ~
~ A Board Semiconductor
Location Table ~
E
D
O
I
D
1
2
4
D
2
-
C
1
3
6
D
7
-
L
1
0
0
D
2
-
I
2
2
4
D
2
-
C
2
3
6
D
5
-
K
2
0
0
D
3
-
I
3
2
4
D
2
-
C
3
3
6
D
5
-
L
3
0
0
D
2
-
K
4
2
4
D
2
-
M
8
3
6
D
6
-
I
4
0
0
D
4
-
M
7
2
4
D
4
-
A
0
4
6
D
5
-
L
6
0
0
D
8
-
M
8
2
4
D
3
-
C
R
O
T
S
I
S
N
A
R
T
7
0
0
D
1
-
K
9
2
4
D
3
-
D
3
1
0
Q
3
-
I
8
0
0
D
3
-
L
5
3
4
D
2
-
A
4
1
0
Q
1
-
L
0
1
0
D
2
-
G
6
3
4
D
2
-
A
9
4
0
Q
3
-
J
1
1
0
D
2
-
F
1
0
5
D
9
-
D
2
0
2
Q
3
-
E
3
1
0
D
1
-
M
2
0
5
D
9
-
D
3
0
2
Q
2
-
F
6
1
0
D
2
-
J
3
0
5
D
2
-
I
2
1
2
Q
5
-
I
8
1
0
D
3
-
I
4
0
5
D
2
-
I
1
0
4
Q
1
-
C
0
2
0
D
8
-
M
5
0
5
D
2
-
M
9
0
4
Q
1
-
G
1
2
0
D
2
-
L
6
0
5
D
4
-
D
1
1
4
Q
2
-
D
2
2
0
D
2
-
J
7
0
5
D
2
-
M
2
3
5
Q
4
-
D
5
3
0
D
3
-
K
2
1
5
D
8
-
D
3
3
5
Q
6
-
A
6
3
0
D
3
-
K
3
1
5
D
9
-
D
5
3
5
Q
4
-
B
1
5
0
D
3
-
L
4
1
5
D
9
-
C
1
0
6
Q
5
-
K
1
0
1
D
1
-
B
4
3
5
D
5
-
E
2
0
6
Q
5
-
G
3
0
1
D
1
-
E
5
3
5
D
6
-
E
3
0
6
Q
5
-
G
4
0
1
D
2
-
E
6
3
5
D
6
-
B
4
0
6
Q
5
-
H
5
0
1
D
1
-
A
7
3
5
D
4
-
C
6
0
6
Q
0
1
-
G
6
0
1
D
1
-
B
8
3
5
D
6
-
E
7
0
6
Q
9
-
G
7
0
1
D
2
-
B
9
3
5
D
5
-
B
8
0
6
Q
6
-
J
7
0
2
D
3
-
F
1
4
5
D
5
-
F
9
0
6
Q
6
-
J
0
1
2
D
5
-
I
3
7
5
D
5
-
F
0
1
2
1
Q
3
-
H
1
1
2
D
5
-
I
1
0
6
D
9
-
I
1
1
2
1
Q
3
-
H
2
1
2
D
5
-
I
2
0
6
D
5
-
J
0
3
2
1
Q
3
-
B
8
2
2
D
4
-
E
4
0
6
D
9
-
F
1
3
2
1
Q
3
-
B
6
3
2
D
3
-
D
8
0
6
D
8
-
F
2
3
2
1
Q
3
-
B
9
3
2
D
3
-
D
0
1
6
D
5
-
J
3
3
2
1
Q
2
-
C
2
0
4
D
3
-
E
1
1
6
D
5
-
G
S
'
C
I
3
0
4
D
2
-
B
2
1
6
D
5
-
G
1
0
0
C
I
2
-
K
4
0
4
D
3
-
I
3
1
6
D
6
-
J
2
0
0
C
I
8
-
M
5
0
4
D
2
-
B
4
1
6
D
8
-
K
4
0
0
C
I
2
-
H
6
0
4
D
2
-
B
5
1
6
D
5
-
H
1
0
4
C
I
3
-
I
7
0
4
D
2
-
B
8
1
6
D
6
-
H
1
0
5
C
I
0
1
-
E
8
0
4
D
2
-
B
9
1
6
D
6
-
H
1
3
5
C
I
4
-
F
0
1
4
D
2
-
C
0
2
6
D
5
-
M
1
0
6
C
I
0
1
-
F
1
1
4
D
3
-
C
1
2
6
D
5
-
J
2
0
6
C
I
7
-
F
2
1
4
D
3
-
D
2
2
6
D
7
-
H
4
0
6
C
I
5
-
H
3
1
4
D
3
-
C
3
2
6
D
5
-
J
8
0
6
C
I
5
-
L
4
1
4
D
2
-
B
5
2
6
D
6
-
H
9
0
6
C
I
6
-
L
8
1
4
D
3
-
B
7
2
6
D
7
-
K
1
0
2
1
C
I
4
-
H
9
1
4
D
2
-
E
8
2
6
D
7
-
L
0
2
4
D
2
-
B
9
2
6
D
7
-
L
A
B
C
D
E
F
G
H
I
J
K
L
M
N
1
2
3
4
5
6
7
8
9
10
11
- 32 -
~ C Board Schematic Diagram [ R-G-B Out ] ~
1
2
2P
CN7602
AC-IN
AC-IN
S7601
1
3
5
5P
CN7601
AC OUT
NC
AC OUT
POWER SWITCH
F6
COMPONENTS MARKED AS
XX ARE NOT FITTED ON THIS MODEL
F6..-28EW20
TO F3 BOARD
CN3603
TO A BOARD
CN606
~ F6 Board Schematic Diagram [ Power Switch ] ~
f
e
R
e
d
o
n
A
e
d
o
h
t
a
C
f
e
R
e
d
o
n
A
e
d
o
h
t
a
C
f
e
R
e
d
o
n
A
e
d
o
h
t
a
C
1
0
7
D
7
.
0
0
6
0
7
D
8
.
1
3
1
4
.
9
9
1
0
1
7
D
0
6
.
2
2
0
7
D
4
.
4
5
1
4
.
9
9
1
7
0
7
D
7
.
6
3
1
4
.
9
9
1
1
0
8
1
D
0
0
.
8
3
0
7
D
0
0
8
0
7
D
0
1
.
3
2
0
8
1
D
0
8
.
3
5
0
7
D
0
7
.
0
9
0
7
D
0
0
.
3
3
0
8
1
D
0
2
.
4
~ C Board Semiconductor Voltages ~
10ms/div
TP7
20us/div
20us/div
20us/div
20us/div
20us/div
20us/div
2.32 Vp-p (H)
2.32 Vp-p (H)
2.32 Vp-p (H)
116 Vp-p (H)
102 Vp-p (H)
TP1
TP2
TP3
TP4
2.68 Vp-p (H)
116 Vp-p (H)
TP4
TP5
TP6
~ C Board Waveforms ~
o
N
f
e
R
o
N
n
i
P
)
V
(
e
g
a
t
l
o
V
o
N
f
e
R
o
N
n
i
P
)
V
(
e
g
a
t
l
o
V
1
0
7
C
I
1
0
.
3
1
0
8
1
C
I
1
8
.
3
2
6
.
2
2
8
.
3
3
1
.
3
3
8
.
3
4
7
.
0
4
0
5
3
.
6
5
0
.
4
6
9
9
1
6
0
.
4
7
5
.
3
3
1
7
2
.
4
8
4
.
4
5
1
8
0
.
8
9
2
.
6
3
1
~ C Board IC Voltages ~
3
5
6
7
8
9
10
11
13
1
4
J701
0.1W
110M
RV702
1
CN702
1P
GND
1/4W
1M
R703
1SS83TA
D703
XX
SG703
XX
SG702
1W
1k
R726
1W
1k
R712
1W
1k
R705
250V
4.7
C704
D705
EL1Z
EL1Z
1/4W
5.6
R728
1
2
3
4
5
XX
CN704
H2
NC
GND
NC
+200V
1
2
3
4
5
WHT
5P
CN707
H2
NC
+200V
NC
GND
500V
0.001
B
C706
1/2W
RC
33k
R718
2kV
4700p
E
C708
XX
R724
1
CN706
1P
G2
XX
R722
XX
RV701
XX
R709
1
2
3
4
XX
CN701
+1000V
GND
+200V
H2
1
2
9
8
7
6
5
4
3
TDA6108JF/N1B
IC701
RD6.8ESB2
D710
RD6.8ESB2
D709
RD6.8ESB2
D708
50V
0.01
F
C703
50V
10
C702
1/4W
10k
R702
250V
PT
0.1
C701
D706
1SS83TA
D707
1SS83TA
D702
1SS83TA
500V
0.001
B
C705
250V
10
C710
1/4W
1M
R701
1/4W
10k
R1805
1/4W
680k
R1806
0.022
C1803
50V
F
8
7
6
5
4
3
2
1
NJM4556AD
IC1801
ROTATION AMP
100k
R1801
1/4W
1/4W
10k
R1809
1/4W
10k
R1808
XX
R1802
10k
R1807
1/4W
50V
10
C1804
RD10ESB2
D1802
50V
47p
SL
C1805
1
2
3
WHT
3P
CN1801
ROT (+)
NC
ROT (-)
1/4W
10k
R1810
1
2
3
4
5
6
7
WHT
7P
CN703
NS CORRECT
IK
GND
+8V
B IN
G IN
R IN
XX
R1804
RD10ESB2
D1803
XX
R1803
10uH
L704
XX
D704
R704
12.5
XX
C711
1/2W
RC
100
R741
XX
SG701
RD10ESB2
D1801
1/4W
RS
330
R716
1/4W
330
R706
1/4W
RS
330
R727
1SS133
D701
1
2
3
XX
CN705
NS CORRECT
NC
NC
CV
KR
G1
G4
HV
H
KG KB
G2
C
C..-28EW20
PICTURE
TUBE
V901
TO A BOARD HV (T511)
TO COATING EARTH
+200V
+8V
G
B
R
R,G,B OUT
COMPONENTS MARKED AS XX ARE NOT FITTED ON THIS MODEL
TO A BOARD
CN003
TO A BOARD
CN508
CN508
TP4
TP6
TP5
TP1
TP2
TP7
TP3
R
G
B
W66LLX060X
A
B
C
D
E
F
G
H
I
J
K
L
M
N
1
2
3
4
5
6
7
8
9
10
11
- 33 -
~ C Printed Wiring Board Conductor side ~
~ F6 Printed Wiring Board Conductor side ~
~ D2 Printed Wiring Board Conductor side ~
~ VM Printed Wiring Board Conductor side ~
Click on the first or last page to see other KV-28EW20B service manuals if exist.