Read Sony KV-28FQ86B (serv.man3) Service Manual online
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B
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D
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- 3 -
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.
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.
~ VM Printed Wiring Board Conductor side ~
~ D2 Printed Wiring Board Conductor side ~
~ VM Board Schematic Diagram [ Velocity Modulation ] ~
1/4W
FPRD
1
R9401
35V
47
C9401
25V
0.1
C9402
160V
10
C9404
500V
4700p
C9406
16V
0.1
C9403
1/10W
12k
R9404
1/10W
33k
R9405
1/10W
47
R9406
MSD601-RST1
Q9401
MSD601-RST1
Q9402
1/10W
820
R9402
1/10W
680
R9403
1/10W
330
R9408
25V
0.1
C9407
1/10W
47
R9409
1/10W
47
R9410
MSD601-RST1
Q9403
MSB709-RT1
Q9404
1/4W
FPRD
FPRD
10
R9411
1/4W
FPRD
10
R9412
MSB709-RT1
Q9406
MSD601-RST1
Q9405
1/4W
FPRD
10
R9413
1/4W
FPRD
10
R9414
MSB709-RT1
Q9408
1/4W
FPRD
FPRD
10
R9416
1/4W
FPRD
FPRD
10
R9415
MSD601-RST1
Q9407
MSD601-RST1
Q9409
1/4W
FPRD
10
R9417
MSB709-RT1
Q9410
1/4W
FPRD
10
R9418
50V
10
C9408
160V
10
C9409
250V
PT
0.1
C9410
16V
0.1
C9411
2SA2005
Q9411
2SC5511
Q9412
1/10W
22
R9421
1/10W
22
R9422
1/10W
1k
R9423
1/10W
1k
R9420
1/10W
33k
R9424
1/10W
33k
R9419
1/10W
33k
R9426
1/10W
33k
R9427
16V
0.1
C9413
250V
PT
0.1
C9412
250V
PT
0.47
C9414
2W
RS
470
R9425
1
2
3
4
5
6
7
8
8P
CN9403
QP(-)
QP(-)
QP(+)
QP(+)
GND
GND
VM
VM
1uH
L9402
1uH
L9401
1
2
3
4
5
6
7
WHT
7P
CN9401
+B
NC
GND
QP(-)
+9V
NC
QP(+)
XX
R9428
MSD601-RST1
Q9413
1/10W
1k
R9429
1/10W
100
R9430
1
2
3
WHT
3P
CN9402
REF
VM
GND
1/10W
100
R9431
MSB709-RT1
Q9414
1/10W
470
R9432
1/10W
470
R9433
C9415
XX
VM
VM.-28/32FQ86-SUP
VELOCITY MODULATION
TO D BOARD
CN8206
TO B BOARD
CN3402
BUFFER
AMPLIFIER
AMPLIFIER
AMPLIFIER
AMPLIFIER
AMPLIFIER
AMPLIFIER
AMPLIFIER
AMPLIFIER AMPLIFIER AMPLIFIER
VM OUT
VM OUT
TO NECK ASSY
COMPONENTS MARKED AS XX ARE NOT FITTED ON THIS MODEL
TP1
TP3
TP2
1
2
3
3P
CN9404
CY+
NC
CY+
f
e
R
6
8
Q
F
8
2
-
V
K
6
8
Q
F
2
3
-
V
K
3
0
4
9
L
H
U
0
0
1
H
U
8
6
4
0
4
9
L
H
U
0
0
1
H
U
2
8
~ VM Board Difference Table ~
f
e
R
6
8
Q
F
8
2
-
V
K
6
8
Q
F
2
3
-
V
K
1
1
1
8
C
F
P
0
7
4
F
P
0
3
3
0
2
1
8
C
F
U
8
1
.
0
F
U
2
1
.
0
0
3
1
8
C
F
P
0
2
2
-
9
3
1
8
C
F
P
0
0
1
F
P
0
3
3
1
4
1
8
C
F
P
0
0
3
4
F
P
0
0
7
4
6
4
1
8
C
F
U
8
6
0
.
0
F
U
2
8
0
.
0
8
4
1
8
C
F
U
8
1
.
0
F
U
1
.
0
4
1
2
8
N
C
P
5
-
7
2
1
8
R
K
7
.
4
K
6
.
5
4
4
1
8
R
K
7
.
4
K
3
.
3
6
5
1
8
R
K
0
7
4
K
0
8
6
6
7
1
8
R
K
8
.
6
K
0
1
7
7
1
8
R
K
6
.
5
K
7
.
4
2
2
2
8
R
8
6
.
0
2
2
.
0
0
7
5
8
R
8
1
9
.
3
1
7
5
8
R
8
1
0
1
~ D Board Difference Table ~
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