— 34 —
Unit [V]
Ref.
No.
Pin
STBY
TALK
Note
1
0.7
0.7
2
0.8
0.8
3
0
0
IC12
4
5.1
5.1
1
5.1
5.1
2
0
0
3
1.2
1.2
4
3.2
3.2
5
0
0
IC13
6
5.1
5.1
1
5.1
5.1
IC14
2
5.1
5.1
3
0
0
1
1.0
1.0
2
0
0
3
1.3
1.2
4
0
0
5
0
0
6
0
0
7
0
0
IC15
8
0.3
0.3
9
0.2
0.2
10
0.6
0.6
11
5.1
5.1
12
0
0
13
0
0
14
5.1
5.1
1
2.1
2.1
2
2.1
2.1
3
2.1
2.1
4
0
0
5
2.1
2.1
6
2.1
2.1
7
2.1
2.1
IC16
8
5.1
5.1
1
0.2
0.2
2
0.6
0.6
3
0
0
IC17
4
0.6
0.6
1
0
0
2
0
0
3
0
0
4
0
0
5
0
0
6
0
4.8
IC18
7
0
0
8
0
0
9
0
0
10
0
4.7
11
2.6
0.3
12
0
0
Unit [V]
Ref.
No.
Pin
STBY
TALK
Note
13
0
4.8
14
0
5.1
15
0
0
16
0
0
17
0
0
18
4.8
0
19
0
0
20
1.0
1.0
21
4.8
4.8
22
4.8
4.8
23
4.8
0~4.8
24
4.8
4.8
25
4.8
4.8
26
4.8
4.8
27
0
0
28
0
0
29
0
0
30
0
0
31
0
0
32
0
0
33
0
0
34
5.1
5.1
35
5.1
5.1
36
5.1
5.1
37
5.1
5.1
38
5.1
5.1
IC18
39
0
0
40
0
0
41
0
0
42
0
0
43
0
0
44
4.8
4.8
45
4.8
4.8
46
2.3
2.3
47
4.8
4.8
48
4.8
4.8
49
4.8
4.8
50
0
0
51
2.3
2.3
52
2.2
2.1
53
4.8
4.8
54
5.1
5.1
55
5.1
5.1
56
0
0
57
0.6
0
58
0
0
59
1.6
1.6
60
1.6
1.6
61
1.6
1.6
62
3.2
3.2
63
0
0
Summary of Contents for FT-8258
Page 1: ...SERVICE MANUAL PUBLISHED IN JAPAN Jun 1998 FILE NO 2B0 9801 FT 8258 CORDLESS TELEPHONE ...
Page 10: ...BLOCK DIAGRAMS Handset Main 9 ...
Page 11: ...Handset RF 10 ...
Page 12: ...Base RF 11 ...
Page 13: ...Base Main 12 13 ...
Page 14: ... 14 15 SCHEMATIC DIAGRAMS ...
Page 15: ... 16 17 Base RF ...
Page 16: ...Base Key 18 19 ...
Page 17: ... 20 21 Handset Main ...
Page 18: ... 22 23 Handset RF ...
Page 37: ...ELECTRICAL PARTS LOCATIONS Base Main 42 ...
Page 38: ...Base RF 43 ...
Page 39: ...Base Key 44 ...
Page 40: ...Handset Main 45 ...
Page 41: ...Handset RF 46 ...
Page 42: ...WIRING DIAGRAMS Base 47 ...
Page 43: ...Handset 48 ...
Page 75: ...MECHANICAL PARTS LIST ...