Philips FW-R7/17 Servise Manual page 16

Generation +B2 supply voltage
1008
17
1 4,5V
16
*
15
2
10,5V
14
3
6,5V
13
6,5V
4
12
10,5V
11
5
10
38V
6
9
7
8
pos. halfwave
neg. halfwave
Generation of +C
Full wave rectifying with 2 diodes of bridge rectifier 6201, using 50% secondary winding of mains transformer (pin 13-15/13-11).
See pictures 2 and 3 below.
1008
17
1
16
*
15
2
14
3
13
4
12
11
5
10
6
9
7
8
pos. halfwave
neg. halfwave
Simplified
6201
15 D5SBA20
17V
13
17V
11
6201
Signal path
4,5V
10,5V
6,5V
6,5V
10,5V
38V
Signal path
1205
picture 3
9-3
1205
6202
1N5392
6203
1203
1N5392
6204
1204
1N5392
6205
1N5392
2206
100n
D5SBA20
picture 1
1205
6202
1N5392
6203
1203
1N5392
6204
1204
1N5392
6205
1N5392
2206
100n
D5SBA20
picture 2
18V
+C
6201
100n
2211
6201
100n
2211
18V
+C
25V
+B2
25V
+B1
36V
+A
18V
+C
25V
+B2
25V
+B1
36V
+A