Read Sony KV-21FX250 Service Manual online
KV-21FX250/21FX250A/21FX250C
KV-21FX250/21FX250A/21FX250C
30
4-3. BLOCK DIAGRAM
SIGNAL FLOW BLOCK DIAGRAM
A (
)
P OW E R S UP P LY ,
AUDIO, DE F LE C T ION,
T UNE R , J AC K
C N901
63
R OUT
62
30
S IF IN 2
S C AR T HP R
OUT R
112
113
IC 001
S Y S T E M C ONT R OLLE R ,
V IDE O & AUDIO P R OC E S S OR
MUT E
LS R
R OT C T R L
R OT S W
36
61
60
99
97
S W IT C H
8
IC 200
AUDIO AMP LIF IE R
IN R /NC
T U101
S C L
S DA
IF OUT
37
24
25
29
S IF IN 1
V IF IN 2
V IF IN 1
OUT L
S W F 101
54
53
57
56
79
78
48
58
50
49
115
MUT E
S W IT C H
Q902
MUT E
S W IT C H
Q901
L OUT
J 903
R E LAY
S W IT C H
Q601
R E LAY
R Y 600
LINE
F ILT E R
T 600
LINE
F ILT E R
T 603
MAIN
R E C T IF IE R
D604
P 16
P 15
P 7
P 9
P 3
P 5
P 11
P 10
P 12
P 14
P 1
R IN 3
L IN 3
R IN 1
L IN 1
V OUT
V OUT MON
S W F 100
S C L
S DA
R 2
L2
C N600
C N601
C N602
2
1
2
1
2
1
S C AR T HP R
IN R 3
IN L3
IN L1
IN R 1
Y /G IN
R -Y /R IN
MON OUT
C V B S 1/-/1
INR 2
INL 2
DG C R E LAY
104
2
5
9
MUT E
IN L
7
12
10
P W G ND
OUT L
OUT R /NC
V C C
7
6
5
8
IC 003
NV M
I
O
IC 002
IR R E C E IV E R
87
119
86
85
22
23
67
5
3
7
IC 801
C OMP AR AT O R
1
IC 804
V E R T IC AL DE F LE C T IO N
B OOS T E R
5
DR V -IN
2
4
OUT P UT
V C C
V S S
Q806
Q807
Q807
Q808
5
IC 802
P IN AMP
3
S W IT C H
Q803
1
4
6
3
1
3
5
7
8
16
13
14
15
17
18
12
11
10
IC 607
2V R E G
IC 606
3.3V R E G
IC 602
9V R E G
IC 605
E R R O R
AMP
1
2
IC 604
5V R E G
IC 603
18V R E G ULAT OR
5
IC 601
S W IT C HING
R E G ULAT O R
2
4
3
1
1.8V AUDIO
+3.3V
+5V
+9V
+1.8V MAIN
+B
P HY 600
IS OLAT O R
1
4
2
6
5
F V
HV
S V
13
9
8
7
11
T 801
S W IT C H
S 800
J 200
C N200
1
4
C N904
2
3
4
3
C N005
C N004
2
3
4
B INT
B DAT
B C LK
K E Y
B OUT
G OUT
R OUT
T O C B OAR D
C N701
T O C ONT R OL P ANE L
DY 800
6
5
4
3
2
1
C N801
1
4
T O C B OAR D
C N703
8V
T 800
T 602
S R T
LS L
MO MUT E AUDIO
S DA1
S C R 0
S DA0
S IR S C
B INT
K E Y
B OUT
G OUT
R OUT
V D-
H OUT
V D+
DG C T
DG C T
DG C
DG C
F 600
5A
250V
S 600
V IN 1
OUT
V C C
D821
D819
H.DY
H.DY
V .DY
V .DY
DY
HE ADP HONE S
T O S P E AK E R S
S P L
S P R
T O P IC T UR E T UB E
F V
AC IN
AC IN
F R O NT
S OC K E T S
S C AR T
AUDIO 1
T O C B OAR D
J 751
200V
H1
21
E W D
1
7
6
1
Q016
108
106
109
102
LINE
F ILT E R
T 604
51 C V B S 2/Y 2
V 2
U-OUT
80
Y -OUT
B -Y /B IN
+B
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