Sony KV-25FS12 Manual De Servicio página 26

A BOARD IC VOLTAGE LIST
IC402
pin volt
1 6.8
2 GND
3 14.1
4 6.8
5 4.3
6 N/C
7 4.1
8 4.1
9 6.8
10 4.1
11 4.1
12 4.1
13 5.2
14 6.8
15 14.1
16 GND
17 6.8
A BOARD IC BLOCK DIAGRAMS
IC402: TDA8580Q/N1
7
IN 1
TDA8580Q/N1
8
IN 2
V px
30 k
BUFFER
10
IN 3
12
IN 5
11
IN 4
13
MUTE
5
STANDBY
IC501
pin volt pin
1 0.2 1
2 3.7 2
3 2.5 3
4 GND 4
5 9.5 5
6 10.1
7 0.1 pin
8 14.0 1
IC502 2
pin volt 3
1 2.1
2 14.0 pin
3 -12.6 I
4 -13.9 G
5 0.2 O
6 14.3 4
7 2.1
V P1
V P2
3 15
+
60
V/l
-
k
+
60
V/l
k
-
V px
45
k
45
k
+
60
V/l
-
k
+
60
V/l
k
-
INTERFACE
2 16
PGND1 PGND2
IC601 IC604
volt pin volt
-31.8 1 13.3
-32.7 2 5.0
53.2 3 GND
-23.8 IC2001
-32.7 pin volt
IC602 1 5.0
volt 2 5.0
135.9 3 GND
123.4
All voltages are in V
GND
IC603
volt
13.3
GND
8.9
13.3
45 k
-
1
OA
OUT 1 +
+
+
4
OA OUT 2 -
-
45 k
9
BUFFER
BUFFER
45 k
-
14
OA OUT 3 -
+
+
17
OUT 4 +
OA
-
45 k
6
DIAGNOSTIC
DIAG
— 26 —
TU101 14
pin volt 15
1 8.6 16
2 30.7 17
3 5.1 18
4 4.9 19
5 4.9 20
6 GND 21
7 5.5 22
8 N/C 23
9 8.9 24
10 4.1 25
11 GND 26
12 N/C 27
13 N/C
All voltages are in V
IC502: TDA8172
Output
Supply State
Voltage Supply
2 6
1
Inv. Input
Power
Amplifier
Non-Inv. Input
7
TDA8172
4
Gnd
KV-25FS12 / 25FS12C
N/C
N/C
N/C
4.7
4.4
5.0
5.0
0.3
0.0
N/C
0.0
N/C
4.5
4.5
Flyback
Generator
3
Flyback
Generator
Output
5
Thermal
Protection