—35—
Unit [V]
Ref.
No.
Pin
STBY
TALK
Note
15
0
0
16
0
3.1
17
0
3.2
18
0
1.0
19
0
0
20
0
1.0
21
0
1.7
22
0
2.5
23
0
1.6
IC502
24
0
2.4
1
0
0
2
0
0
3
0
0
4
0
0
5
0
0
IC601
6
0
0
7
0
0
8
0
0
9
0
0
10
0
0
11
0
0
12
0
0
1
0
0
2
0
0
3
0
0
4
0
0
5
0
0
IC602
6
0
3.6
1
0
1.2
2
0
3.3
3
0
0
4
0
0
5
0
1.2
6
0
3.3
7
0
3.3
8
0
0
9
0
1.2
10
0
0
IC603
11
0
0
12
0
0
13
0
0
14
0
3.4
15
0
3.3
16
0
0
17
0
0
18
0
0
19
0
0
20
0
0
21
0
0
22
0
0
23
0
0
Unit [V]
Ref.
No.
Pin
STBY
TALK
Note
24
0
0
25
0
0
26
0
1.5
27
0
1.5
28
0
3.6
29
0
3.3
30
0
3.3
31
0
3.3
32
0
3.3
33
0
3.3
34
0
3.3
IC603
35
0
3.6
36
0
3.6
37
0
3.6
38
0
3.2
39
0
1.2
40
0
0
41
0
0.6
42
0
0.6
43
0
0
44
0
0
45
0
0
46
0
0
47
0
0
48
0
0
1
0
3.6
IC604
2
0
3.6
3
0
0
1
0
3.6
IC605
2
0
3.6
3
0
0
Summary of Contents for FT-8508
Page 1: ...SERVICE MANUAL PUBLISHED IN JAPAN Jun 1998 FILE NO 2B0 9804 FT 8508 CORDLESS TELEPHONE ...
Page 3: ... 2 OPERATING CONTROLS BASE UNIT CONTROLS HANDSET CONTROLS RS YZ 1 2 ...
Page 10: ...Handset Main 9 BLOCK DIAGRAMS ...
Page 11: ...Handset RF 10 ...
Page 12: ...Base RF 11 ...
Page 13: ...Base Main 12 13 ...
Page 14: ...SCHEMATIC DIAGRAMS Base Main 14 15 ...
Page 15: ...Base RF 16 17 ...
Page 16: ...Base Key 18 19 ...
Page 17: ...Handset Main 20 21 ...
Page 18: ...Handset RF 22 23 ...
Page 36: ...Base Main 41 ELECTRICAL PARTS LOCATION ...
Page 37: ...Base RF 42 ...
Page 38: ...Base Key 43 ...
Page 39: ...Handset Main 44 ...
Page 40: ...Handset RF 45 ...
Page 41: ...Base 46 WIRING DIAGRAMS ...
Page 71: ...MECHANICAL PARTS LIST ...