B Board - Sony FDL-PT222 Service Manual

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B BOARD IC VOLTAGE LIST
Pin Volt
Pin Volt
Pin Volt
IC301 1
3.0
24
4.2
23
3.4
2
3.1
IC401 1
1.3
24
-
3
0.6
2
0
25
3.8
4
-
3
0.8
26
3.3
5
3.5
4
0.8
27
0.9
6
2.5
5
2.7
28
0.9
7
-
6
2.7
29
0.9
8
-
7
2.8
30
0.8
9
2.8
8
2.8
31
0.3
10
3.0
9
3.3
32
3.8
11
2.9
10
1.9
33 GND
12
3.1
11
3.9
34
1.8
13 GND
12
3.9
35
1.1
14
0.3
13
0
36
0
15
-
14
3.9
37
0.3
16
-
15
1.7
38
3.6
17
1.5
16
1.7
39 GND
18
3.7
17
1.7
40
0
19
1.6
18
1.7
41
2.1
20
2.0
19
1.7
42
0
21
3.4
20
2.0
43
3.5
22
-
21
2.0
44 GND
23
2.0
22 GND
B BOARD TRANSISTOR VOLTAGE LIST
B
C
E
Q302 0.3
3.5 GND
Q303 3.6
1.8
4.1
Q402 3.9
4.4
3.2
Q403 2.1
0
GND
Q408
0
3.8 GND
1
2
3
4
5
6
Q406 GND -0.7
6.5
12.4 13.3
6.5
Q407 1.8
0
6.5
1.8
1.8
13.3
– 25 –
B
– B Board –
1
A

B BOARD

DIODE
*
3
D301
B-2
3
D302
B-2
B
3
D303
F-2
3
D401
C-3
3
D403
F-4
3
D404
F-4
3
D405
B-3
IC
IC301
C-3
C
IC401
C-4
TRANSISTOR
*
2
Q302
C-3
Q303
B-2
2
2
Q402
B-3
2
Q403
C-3
Q406
C-5
Q407
B-5
D
2
Q408
C-3
VARIABLE
RESISTOR
RV301
B-2
RV402
C-4
E
F
G
CHROMA, LCD INTERFACE
3
4
2
< Component Side >
< Conductor Side >
5
– 26 –

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