DOWNLOAD Sony KV-28FQ70B Service Manual ↓ Size: 36.2 MB | Pages: 78 in PDF or view online for FREE

Model
KV-28FQ70B
Pages
78
Size
36.2 MB
Type
PDF
Document
Service Manual
Brand
Device
TV
File
kv-28fq70b.pdf
Date
PREV: Sony KP-44DX2U Service Manual

Sony KV-28FQ70B Service Manual ▷ View online

- 37 -
~ A Board Location Table (A Side) ~
~ A Board Location Table (B Side) ~
E
D
O
I
D
3
0
5
2
D
9
-
G
4
2
0
3
D
3
-
B
9
0
3
5
D
3
-
J
3
0
1
5
C
I
3
-
L
R
O
T
S
I
S
N
A
R
T
1
0
2
3
Q
2
-
C
0
0
3
5
Q
4
-
M
3
0
0
7
Q
6
-
H
1
0
1
0
D
7
-
B
1
0
0
3
D
7
-
B
6
2
0
3
D
2
-
B
0
0
4
5
D
4
-
K
4
0
1
5
C
I
5
-
K
0
0
0
1
Q
6
-
C
2
0
2
3
Q
3
-
C
1
0
3
5
Q
5
-
L
9
0
0
7
Q
7
-
I
4
0
1
0
D
5
-
C
3
0
0
3
D
7
-
B
8
2
0
3
D
2
-
C
1
0
4
5
D
4
-
J
0
0
2
5
C
I
3
-
M
1
0
0
1
Q
6
-
D
4
0
2
3
Q
3
-
C
2
0
3
5
Q
7
-
K
1
1
0
7
Q
6
-
J
0
1
1
0
D
4
-
G
5
0
0
3
D
7
-
B
1
0
2
3
D
2
-
F
4
0
4
5
D
3
-
J
1
0
2
5
C
I
4
-
L
4
0
0
1
Q
1
1
-
D
0
0
3
3
Q
3
-
F
3
0
3
5
Q
4
-
M
2
1
0
7
Q
5
-
J
1
1
1
0
D
2
-
G
7
0
0
3
D
6
-
B
3
0
1
5
D
6
-
L
5
0
4
5
D
3
-
I
0
0
3
5
C
I
3
-
J
5
0
0
1
Q
2
-
B
1
0
3
3
Q
3
-
F
4
0
3
5
Q
5
-
M
3
1
0
7
Q
6
-
J
2
1
1
0
D
5
-
C
8
0
0
3
D
6
-
B
4
0
1
5
D
5
-
J
9
0
8
5
D
8
-
K
1
0
3
5
C
I
4
-
K
6
0
0
1
Q
3
-
B
2
0
3
3
Q
3
-
F
5
0
3
5
Q
3
-
K
4
1
0
7
Q
6
-
J
3
1
1
0
D
5
-
C
9
0
0
3
D
6
-
B
0
0
2
5
D
2
-
K
1
1
8
5
D
8
-
L
2
0
3
5
C
I
4
-
M
0
0
0
2
Q
9
-
C
0
0
5
3
Q
3
-
F
6
0
3
5
Q
4
-
K
5
1
0
7
Q
5
-
I
6
0
0
1
D
0
1
-
B
1
1
0
3
D
4
-
C
2
0
2
5
D
4
-
L
2
1
8
5
D
8
-
L
0
0
4
5
C
I
3
-
I
2
0
0
2
Q
9
-
D
1
0
5
3
Q
3
-
F
0
0
4
5
Q
4
-
J
6
1
0
7
Q
6
-
I
4
1
0
2
D
9
-
C
3
1
0
3
D
4
-
C
0
0
3
5
D
5
-
L
0
0
2
6
D
7
-
E
0
0
2
6
C
I
9
-
I
3
0
0
2
Q
9
-
D
1
0
1
5
Q
5
-
M
1
0
4
5
Q
4
-
J
7
1
0
7
Q
6
-
I
5
1
0
2
D
9
-
D
5
1
0
3
D
4
-
C
3
0
3
5
D
4
-
N
C
I
1
0
2
6
C
I
8
-
I
4
0
0
2
Q
7
-
E
0
0
2
5
Q
4
-
M
2
0
4
5
Q
5
-
J
8
1
0
7
Q
5
-
I
6
1
0
2
D
8
-
E
7
1
0
3
D
4
-
B
4
0
3
5
D
4
-
M
0
0
0
2
C
I
8
-
C
2
0
2
6
C
I
6
-
F
5
0
0
2
Q
7
-
E
1
0
2
5
Q
4
-
N
3
0
4
5
Q
4
-
J
9
1
0
7
Q
6
-
I
8
1
0
2
D
2
-
B
8
1
0
3
D
3
-
B
5
0
3
5
D
6
-
L
1
0
0
2
C
I
9
-
D
3
0
2
6
C
I
6
-
E
1
0
5
2
Q
8
-
G
2
0
2
5
Q
3
-
K
4
0
4
5
Q
4
-
J
9
1
0
2
D
2
-
B
9
1
0
3
D
3
-
B
6
0
3
5
D
5
-
L
0
0
5
2
C
I
8
-
F
5
0
2
6
C
I
5
-
K
2
0
5
2
Q
9
-
G
3
0
2
5
Q
2
-
J
3
1
8
5
Q
8
-
J
0
0
5
2
D
9
-
G
1
2
0
3
D
4
-
C
7
0
3
5
D
7
-
L
0
0
1
3
C
I
5
-
E
6
0
2
6
C
I
3
-
G
3
0
5
2
Q
9
-
G
4
0
2
5
Q
4
-
L
5
1
8
5
Q
8
-
L
2
0
5
2
D
9
-
G
3
2
0
3
D
3
-
B
8
0
3
5
D
4
-
M
0
0
2
3
C
I
3
-
E
7
0
2
6
C
I
4
-
G
0
0
2
3
Q
3
-
C
5
0
2
5
Q
3
-
M
6
1
8
5
Q
8
-
L
E
D
O
I
D
6
0
0
1
D
0
1
-
M
3
0
0
3
D
7
-
M
5
1
0
3
D
4
-
M
6
2
0
3
D
2
-
M
5
0
3
5
D
6
-
D
0
0
2
6
D
6
-
J
1
0
3
5
C
I
4
-
D
6
0
2
6
C
I
3
-
H
1
0
1
0
D
7
-
M
4
1
0
2
D
9
-
L
5
0
0
3
D
7
-
M
7
1
0
3
D
4
-
M
8
2
0
3
D
2
-
M
6
0
3
5
D
5
-
C
4
0
0
7
D
7
-
F
2
0
3
5
C
I
4
-
B
7
0
2
6
C
I
4
-
H
4
0
1
0
D
5
-
L
5
1
0
2
D
9
-
K
7
0
0
3
D
7
-
M
8
1
0
3
D
3
-
N
1
0
2
3
D
2
-
J
7
0
3
5
D
7
-
D
C
I
0
0
4
5
C
I
4
-
G
R
O
T
S
I
S
N
A
R
T
0
1
1
0
D
4
-
I
8
1
0
2
D
2
-
M
8
0
0
3
D
7
-
M
9
1
0
3
D
3
-
N
3
0
1
5
D
6
-
D
0
0
4
5
D
4
-
E
4
0
1
5
C
I
6
-
D
1
0
2
6
C
I
9
-
G
2
0
2
5
Q
2
-
E
1
1
1
0
D
2
-
H
9
1
0
2
D
2
-
M
9
0
0
3
D
7
-
N
1
2
0
3
D
4
-
M
4
0
1
5
D
5
-
E
4
0
4
5
D
4
-
F
0
0
2
5
C
I
3
-
B
2
0
2
6
C
I
6
-
I
1
0
3
5
Q
5
-
C
2
1
1
0
D
4
-
M
2
0
5
2
D
9
-
H
1
1
0
3
D
4
-
M
3
2
0
3
D
4
-
M
0
0
2
5
D
2
-
D
5
0
4
5
D
3
-
F
1
0
2
5
C
I
4
-
C
3
0
2
6
C
I
6
-
J
6
0
3
5
Q
4
-
E
3
1
1
0
D
5
-
M
1
0
0
3
D
7
-
M
3
1
0
3
D
4
-
M
4
2
0
3
D
4
-
M
1
0
2
5
D
2
-
E
7
0
8
5
D
7
-
F
0
0
3
5
C
I
4
-
E
5
0
2
6
C
I
5
-
D
4
0
4
5
Q
4
-
F
5ms/div
5ms/div
20us/div
5ms/div
2ms/div
10us/div
744 mVp-p (V)
53 Vp-p (V)
1.4 Vp-p (H)
264 mVp-p (H)
272 mVp-p (H)
TP1
TP2
TP3
TP4
688 mVp-p (H)
TP4
TP5
TP6
~ A Board Waveforms ~
- 38 -
f
e
R
)
s
(
)
g
(
)
d
(
f
e
R
)
e
(
)
b
(
)
c
(
f
e
R
)
e
(
)
b
(
)
c
(
f
e
R
)
e
(
)
b
(
)
c
(
f
e
R
)
e
(
)
b
(
)
c
(
f
e
R
)
e
(
)
b
(
)
c
(
0
0
5
3
Q
7
.
2
3
.
3
9
.
3
2
0
0
2
Q
0
0
4
4
0
2
3
Q
5
4
.
4
4
.
3
5
0
2
5
Q
9
.
1
2
.
1
0
3
1
8
5
Q
0
9
.
7
0
5
1
0
7
Q
6
.
1
1
9
.
0
1
8
.
8
1
0
5
3
Q
7
.
2
3
.
3
4
3
0
0
2
Q
0
0
4
0
0
3
3
Q
7
.
0
3
.
1
5
0
0
3
5
Q
0
4
.
0
2
.
2
4
1
8
5
Q
0
0
0
6
1
0
7
Q
6
6
.
6
9
.
0
1
1
0
3
5
Q
0
1
.
5
2
.
1
5
4
0
0
2
Q
3
.
3
9
.
3
3
.
8
1
0
3
3
Q
9
.
1
2
.
1
0
1
0
3
5
Q
1
.
5
0
2
.
1
5
5
1
8
5
Q
0
0
5
7
1
0
7
Q
7
.
2
2
0
4
0
4
5
Q
0
0
5
.
0
5
0
0
2
Q
3
.
3
9
.
3
3
.
8
2
0
3
3
Q
9
.
1
2
.
1
0
2
0
3
5
Q
9
.
8
7
.
5
0
6
1
8
5
Q
5
5
0
8
1
0
7
Q
6
.
1
1
9
.
0
1
6
.
8
f
e
R
)
e
(
)
b
(
)
c
(
1
0
5
2
Q
0
0
2
.
5
1
0
0
5
3
Q
3
.
3
7
.
2
9
.
3
4
0
3
5
Q
0
4
.
0
6
.
5
3
0
0
7
Q
6
.
5
2
.
6
8
.
8
9
1
0
7
Q
6
6
.
6
9
.
0
1
1
0
0
1
Q
2
.
3
9
.
3
3
.
8
2
0
5
2
Q
0
7
.
0
0
1
0
5
3
Q
3
.
3
7
.
2
4
0
0
4
3
Q
0
0
1
.
0
9
0
0
7
Q
2
.
3
7
1
.
0
0
2
0
7
Q
9
.
8
9
.
8
0
4
0
0
1
Q
9
.
1
3
.
1
0
3
0
5
2
Q
6
.
0
6
.
0
5
.
0
1
0
1
5
Q
0
4
.
0
4
.
6
1
0
4
5
Q
0
0
9
.
7
1
1
0
7
Q
5
.
2
9
.
1
0
1
2
0
7
Q
7
.
2
7
.
2
9
.
8
5
0
0
1
Q
0
5
.
0
5
0
0
2
3
Q
9
.
1
5
.
2
4
.
4
1
0
2
5
Q
8
.
2
4
.
3
9
.
7
2
0
4
5
Q
0
0
3
.
1
1
-
2
1
0
7
Q
6
.
1
1
9
.
0
1
7
.
8
6
0
0
1
Q
5
7
.
4
1
1
0
2
3
Q
9
.
1
5
.
2
4
.
4
2
0
2
5
Q
2
.
0
8
.
0
7
.
1
1
3
0
4
5
Q
5
.
3
1
-
2
.
1
1
-
3
.
8
-
3
1
0
7
Q
6
6
.
6
9
.
0
1
0
0
0
2
Q
2
.
4
8
.
4
3
.
8
2
0
2
3
Q
5
4
.
4
4
.
3
3
0
2
5
Q
2
.
0
8
.
0
7
.
1
1
4
0
4
5
Q
0
0
5
.
0
4
1
0
7
Q
5
.
2
8
.
1
0
~ A Board Semiconductor Voltage Table ~
~ A Board IC Voltage Table ~
o
N
f
e
R
o
N
n
i
P
)
V
(
s
t
l
o
V
f
e
R
o
N
o
N
n
i
P
)
V
(
s
t
l
o
V
f
e
R
o
N
o
N
n
i
P
)
V
(
s
t
l
o
V
f
e
R
o
N
o
N
n
i
P
)
V
(
s
t
l
o
V
3
0
1
5
C
I
1
3
.
3
1
0
3
5
C
I
5
5
.
6
2
0
0
7
C
I
0
1
4
.
0
2
0
0
7
C
I
8
3
0
2
3
.
3
6
1
.
7
1
1
9
.
1
9
3
8
.
4
3
9
.
1
7
4
.
0
2
1
4
.
0
0
4
8
.
4
4
6
.
2
8
2
1
3
1
9
.
0
1
4
8
.
4
5
5
.
2
2
0
3
5
C
I
1
0
4
1
5
2
4
0
6
8
.
1
2
8
.
5
5
1
5
.
2
3
4
0
7
2
3
3
.
6
6
1
0
4
4
0
8
0
4
0
7
1
3
5
4
3
.
6
9
1
.
3
5
6
.
6
8
1
7
.
2
6
4
9
.
8
0
1
3
6
5
.
6
9
1
9
.
3
7
4
9
.
8
1
1
5
7
4
.
0
0
2
0
8
4
6
2
1
5
8
2
1
1
2
1
.
6
9
4
5
.
2
3
1
5
0
0
4
5
C
I
1
4
.
1
2
2
7
.
2
0
5
1
.
4
4
1
0
2
2
.
3
1
3
2
8
.
8
1
5
0
5
1
0
3
5
.
2
1
-
4
2
0
2
5
6
6
1
5
4
4
.
5
1
-
5
2
3
.
4
3
5
8
.
5
0
0
3
5
C
I
1
6
5
4
.
0
-
6
2
2
.
3
4
5
8
.
5
2
6
6
7
.
3
1
7
2
2
.
5
5
5
4
.
0
3
6
7
4
.
1
8
2
3
.
0
6
5
8
.
5
4
0
2
0
0
7
C
I
1
6
.
3
9
2
9
.
4
7
5
8
.
5
5
6
2
0
0
3
4
.
3
8
5
8
.
5
6
6
3
4
.
4
1
3
6
.
5
9
5
3
.
0
7
6
4
8
.
4
2
3
9
.
8
0
6
0
8
2
1
5
5
.
3
3
3
0
1
6
0
1
0
3
5
C
I
1
7
.
1
6
4
.
3
4
3
7
.
4
2
6
9
.
2
2
5
.
8
7
6
.
7
5
3
7
.
4
3
6
7
.
3
3
5
.
6
8
0
6
3
7
.
4
4
0
9
0
7
3
9
.
8
~ A Board Difference Table ~
f
e
R
B
0
7
Q
F
8
2
-
V
K
E
0
7
Q
F
8
2
-
V
K
U
0
7
Q
F
8
2
-
V
K
0
0
0
1
U
T
D
N
E
T
N
O
R
F
1
1
4
F
E
-
F
T
B
D
N
E
T
N
O
R
F
1
1
4
C
E
-
F
T
B
D
N
E
T
N
O
R
F
1
1
6
U
E
-
F
T
B
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
- 39 -
~ VM Board Schematic Diagram [ Velocity Modulation ] ~
~ H1 Board Schematic Diagram [ Front AV Input, Headphone and Control Switches ] ~
~ F1 Board Schematic Diagram [ Power Switch, Fuse, SIRCS and Stand-By LED ] ~
f
e
R
)
s
(
)
e
(
)
g
(
)
b
(
)
d
(
)
c
(
0
0
4
7
Q
0
.
5
7
.
5
7
.
8
1
0
4
7
Q
9
.
0
5
.
1
1
.
4
2
0
4
7
Q
5
.
5
1
.
6
9
.
8
3
0
4
7
Q
1
.
5
5
.
5
9
.
8
4
0
4
7
Q
7
.
4
1
.
4
0
5
0
4
7
Q
1
.
5
7
.
4
0
6
0
4
7
Q
4
3
1
8
.
3
3
1
8
6
7
0
4
7
Q
1
.
1
4
.
1
8
6
8
0
4
7
Q
3
.
6
6
.
5
5
.
2
9
0
4
7
Q
7
.
5
3
.
6
9
.
0
~ VM Board Voltage Table ~
~ VM Board Waveforms ~
5ms/div
5ms/div
5ms/div
1.54 Vp-p (H) 
1.4 Vp-p (H)
TP1
TP2
20 Vp-p (H)
TP3
250V
4700p
C6400
XX
C0981
25V
100
C0982
RD5.6ESB2
D0981
XX
D0982
1/2W
RC
1M
R6400
R0981
XX
1/4W
100
R0982
VCC
GND
OUT
RPM7240-H5F
IC0981
50V
470p
B
C0983
50V
0.01
B
C0984
250V
5A
F6400
FH6400
S6400
VDR6400
1
2
3
4
BLK
4P
CN0981
SIRCS
LED
GND
STBY +5V
D0983
1
1P
CN6403
A-Lightning-WIRE
1
3
5
5P
CN6401
AC OUT
AC OUT
1
2
2P
CN6400
AC IN
AC IN
SPARK GAPS
F1
TO A BOARD
CN0103
TO G BOARD
CN6001
F1.-28FQ70
TLHK5190
COMPONENTS MARKED AS XX ARE NOT FITTED ON THIS MODEL
POWER SWITCH, FUSE, SIRCS
AND STAND-BY LED
STBY+5V
MTZJ-9.1
D0908
D2902
XX
XX
D2903
50V
1
C2907
50V
1
C2906
1/10W
470k
R2909
CHIP
XX
D3904
D3905
XX
XX
C2908
XX
C2909
XX
C2901
XX
C2900
1/10W
470k
R2910
CHIP
1/10W
1k
R2917
CHIP
1/10W
1k
R2918
CHIP
XX
R3906
XX
R3905
1/10W
10k
R0911
CHIP
6.8k
R0901
CHIP
1/10W
1/10W
3.3k
R0913
CHIP
0
R0902
CHIP
1/10W
1.5k
R0914
CHIP
XX
C2915
XX
C2916
3
4
1
2
L
R
V
S
3P
CN2900
R0912
CHIP
15k
S0900
S0901
S0903
S0902
S0904
S0905
5
JW0904
XX
L0904
5
JW2905
5
JW2901
XX
L2902
XX
L2903
1/4W
120
R2903
1/4W
120
R2902
50V
0.001
B
C2931
XX
C2903
XX
C2902
XX
C2930
1/4W
120
R2901
50V
0.001
B
C2904
XX
C2905
1/4W
120
R2904
5
JW2916
5
JW2915
XX
L2901
XX
L2904
1
2
3
4
5
6
7
8
9
WHT
9P
CN2909
KEY
C
GND
Y/CVBS
GND
L
GND
GND
R
J2901
CHIP
0
JR0901
CHIP
0
JR2901
1
2
3
4
5
6
7
8
XX
CN2911
C
GND
Y/CVBS
GND
L
GND
GND
R
1
2
3
4
5
6
7
WHT
7P
CN2912
KEY 1
HP R
GND
GND
GND
HP L
KEY 2
1
2
3
4
5
6
WHT
6P
CN2910
W
OOFER M.
R OUT
R IN
GND
L IN
L OUT
XX
JW2911
5
JW2912
0
JR2902
H1
CN2000
CN2502
A BOARD
CN2300
 TO A BOARD
TO A BOARD
H1.-28FQ70
FRONT AV INPUT, HEADPHONE AND CONTROL SWITCHES
COMPONENTS MARKED AS XX ARE NOT 
           FITTED ON THIS MODEL
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
- 40 -
~ G Printed Wiring Board Conductor side ~
Note :
Portions of the circuit contained within 
the marked areas as shown have high 
voltages present. Use care to prevent 
electric shock during inspection or repair.
An Isolation Transformer must be used
during any Service work to avoid possible
shock hazard due to live chassis. The 
chassis of this receiver is directly 
connected to the power line.
~ H1 Printed Wiring Board Conductor side ~
~ G Board Semiconductor Location Table ~
E
D
O
I
D
2
1
0
6
D
3
-
E
4
3
0
6
D
2
-
E
8
0
0
6
Q
4
-
D
2
0
0
6
D
3
-
A
3
1
0
6
D
3
-
A
C
I
9
0
0
6
Q
4
-
E
3
0
0
6
D
4
-
G
5
1
0
6
D
2
-
E
1
0
0
6
C
I
5
-
G
0
1
0
6
Q
2
-
B
4
0
0
6
D
4
-
G
3
2
0
6
D
3
-
H
R
O
T
S
I
S
N
A
R
T
4
1
0
6
Q
2
-
J
8
0
0
6
D
3
-
G
0
3
0
6
D
4
-
G
3
0
0
6
Q
1
-
M
1
0
1
6
Q
1
-
L
9
0
0
6
D
4
-
E
1
3
0
6
D
2
-
D
5
0
0
6
Q
2
-
B
2
0
1
6
Q
1
-
J
0
1
0
6
D
4
-
E
2
3
0
6
D
2
-
D
6
0
0
6
Q
4
-
H
3
0
1
6
Q
1
-
J
1
1
0
6
D
3
-
E
3
3
0
6
D
2
-
E
7
0
0
6
Q
3
-
H
5
0
1
6
Q
1
-
L
~ 
VM Printed Wiring Board Conductor side ~
~ F1 Printed Wiring Board Conductor side ~
Page of 78
Display

Click on the first or last page to see other KV-28FQ70B service manuals if exist.

RANDOM: