— 27 —
Ref.
No.
Pin
STBY
TALK
Note
Note
9
0.0
GND
0.0
GND
10
2.9-0.0
DATA(PULSE)
3.0-0.1
DATA(PULSE)
11
0.0
GND
0.0
GND
12
1.5
1.5
13
3.0
Vcc
3.0
Vcc
14
1.5
1.5
15
1.5
OPEN
1.5
OPEN
IC602
16
0.0
2.9
17
0.0
2.9
18
2.8
OPEN
2.8
OPEN
19
1.1
OPEN
1.2
OPEN
20
1.5
1.5
21
0.9
0.6
22
1.5
1.5
23
1.5
1.5
24
1.5
1.5
1
3.5-2.3
OSC
3.4-2.6
OSC
2
2.8-2.1
OSC
2.8-2.2
OSC
3
2.8
2.9-2.4
4
3.0
Vcc
3.0
Vcc
5
1.9
2.2-1.8
6
1.9
2.0
7
1.9
2.0
IC603
8
3.0
2.2-2.0
9
1.8-0.2
2.2-0.6
10
0.8
0.9
11
2.2-0.6
1.8-1.6
12
0.5
0.8
13
2.9
0.0
14
0.0
OPEN
0.0
OPEN
15
0.0
GND
0.0
GND
16
1.9
1.9
1
3.2
3.2
2
3.8
Vbatt
3.8
Vbatt
IC606
3
0.0
GND(digital)
0.0
GND(digital)
4
3.8
Vbatt
3.8
Vbatt
5
3.2
3.2
1
2.8
2.8
2
0.0
GND
0.0
GND
IC607
3
1.2
1.3
4
3.0
3.0
5
3.8
Vbatt
3.8
Vbatt
1
2.8
2.9
2
0.0
OPEN
0.0
OPEN
3
0.0
0.0
4
0.0
0.0
IC608
5
0.0
0.0
6
0.0
0.0
7
0.0
0.0
8
0.0
OPEN
0.0
OPEN
9
0.0
OPEN
0.0
OPEN
10
2.9
3.0
11
2.9
Vcc
2.9
Vcc
12
0.0
GND(digital)
0.0
GND(digital)
13
0.0
GND(digital)
0.0
GND(digital)
14
3.2
3.2
15
3.2
3.2
16
0.0
GND(digital)
0.0
GND(digital)
17
2.9
2.9
18
0.0
GND(digital)
0.0
GND(digital)
19
2.9
2.9
20
0.0
GND(digital)
0.0
GND(digital)
21
0.0
GND(digital)
0.0
GND(digital)
22
1.7-0.4
OSC
1.7-0.5
OSC
23
2.6-0.1
OSC
2.6-0.1
OSC
24
0.0
GND(digital)
0.0
GND(digital)
25
0.0
OPEN
0.0
OPEN
26
0.0
DATA(PULSE)
2.9-0.0
DATA(PULSE)
27
0.0
0.0
28
0.0
2.8
29
0.0
DATA(PULSE)
2.9-0.0
DATA(PULSE)
30
0.0
2.9
31
0.0
2.9
32
0.0
OPEN
0.0
OPEN
33
0.0
OPEN
0.0
OPEN
34
0.0
OPEN
0.0
OPEN
IC608
35
2.9
2.9
36
0.0
OPEN
0.0
OPEN
37
0.0
OPEN
0.0
OPEN
38
3.2
3.2
39
0.0
OPEN
0.0
OPEN
40
0.0
OPEN
0.0
OPEN
41
0-3.8
3.8
SQ_IN
42
2.8
2.9
43
0.0
0.0
44
3.0
0.1
45
0.0
OPEN
0.0
OPEN
46
2.9-0.0
DATA(PULSE)
0.0
DATA(PULSE)
47
2.9-0.0
DATA(PULSE)
0.0
DATA(PULSE)
48
2.9-0.0
DATA(PULSE)
2.9
DATA(PULSE)
49
0.0
GND(digital)
0.0
GND(digital)
50
0.0
2.9
51
0.0
DATA(PULSE)
2.9-0.0
DATA(PULSE)
52
0.0
DATA(PULSE)
2.9-0.0
DATA(PULSE)
53
0.0
0.0
54
0.0
2.9
55
2.9-0.2
DATA(PULSE)
3.0-0.2
DATA(PULSE)
56
2.9
Vcc
2.9
Vcc
57
0.0
Ref OSC
2.8-0.1
Ref OSC
58
0.0
0.0
59
0.0
0.0
60
0.8
1.0
Unit [V]
Unit [V]
Ref.
No.
Pin
STBY
TALK
Note
Note
Summary of Contents for FT-8901A
Page 1: ...SERVICE MANUAL PUBLISHED IN JAPAN Oct 2001 FILE NO 2BO 200113 FT 8901A CORDLESS TELEPHONE ...
Page 9: ...BLOCK DIAGRAMS Base Unit 8 ...
Page 10: ... 9 Handset Unit ...
Page 12: ...Base Key Unit 12 13 FT8901A Sche p65 01 10 15 10 42 Page 9 Adobe PageMaker 6 5J Win ...
Page 26: ... 28 Unit V Ref No Pin STBY TALK Note Note 61 2 9 2 9 IC608 62 2 9 2 9 63 2 9 2 9 64 2 9 2 9 ...
Page 29: ... 31 ELECTRICAL PARTS LOCATION Base Unit Main PCB ...
Page 30: ... 32 Base Unit Key PCB ...
Page 31: ... 33 Handset Unit Main PCB ...
Page 32: ... 34 WIRING DIAGRAMS Base Unit ...
Page 33: ... 35 Handset Unit ...
