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QQ
3 7 63 1515 0
Note on Schematic Diagram:
• All capacitors are in µF unless otherwise noted. pF: µµF 50
WV or less are not indicated except for electrolytics and
tantalums.
• All resistors are in Ω and
specified.
• : internal component.
• : B+ Line.
• Power voltage is dc 14.4 V and fed with regulated dc power
supply from battery and accessory terminals.
• Voltages and waveforms are dc with respect to ground un-
der no-signal (detuned) conditions.
• Voltages are taken with a VOM (Input impedance 10 MΩ).
Voltage variations may be noted due to normal production
tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal production
tolerances.
• Circled numbers refer to waveforms.
• Signal path.
: FM
: MW (LW)
: TAPE PLAYBACK
: BUS AUDIO IN
• Smiconductors Pin Voltage
ICs/Tuner Unit:
No.
IC1
IC3
1
2.4
2.6
TE
L 13942296513
2
NC
2.6
3
0
5.1
4
0
NC
5
0
GND
6
4.6
NC
7
6
NC
8
NC
NC
9
NC
2.6
10
NC
2.6
11
0.1
NC
12
0.2
2.6
13
2.6
1.6 (0.8)
14
5.1
NC
15
2.5 (0.2)
NC
16
0 (2.5)
5.1
17
GND
NC
18
2.5 (0.2)
NC
19
NC
*1
20
0 (2.4)
NC
21
9
22
4.6
23
GND
24
2.4
25
26
27
28
29
30
31
32
33
34
35
36
37
38
www
39
40
41
42
43
.
44
http://www.xiaoyu163.com
1
/
W or less unless otherwise
4
IC151 IC351
IC360
TU1
4.2
<3.7>
GND
0
No.
4.3
<3.7>
<4.8>
0
1
4.3
<3.7>
<8.9>
GND
2
4.3
<3.7>
<4.8>
0.1
3
4.3
<3.7>
GND
4
*2
4.3
<3.7>
<0>
5.8
5
4.3
<3.6>
<8.9>
GND
6
GND
NC
<0>
8.7 (0.2)
7
GND
NC
8.3
8
4.3
<3.8>
0.2 (8.7)
9
4.3
<3.8>
0 (2)
10
4.3
<0>
0 (2.2)
11
4.3
GND
4.6
12
4.3
<0>
NC
13
GND
GND
3.8 (0)
14
0
NC
GND
15
0
<0>
3.8 (0)
16
0
<0>
0.5 (0)
17
4.3
<0>
0 (5.1)
18
4.3
<4.3>
0.2
19
4.3
<0>
5.1
20
4.3
NC
5 (0)
21
4.3
NC
22
4.3
<3.6>
23
GND
<1>
24
GND
<3.7>
25
4.3
<3.7>
26
4.3
GND
27
4.3
<3.7>
28
4.3
<3.7>
29
4.3
<3.7>
30
4.3
<3.7>
31
4.3
<3.7>
32
4.3
<3.7>
33
4.3
<3.7>
34
4.3
GND
35
4.3
<3.7>
36
4.3
<3.7>
37
8.7
<3.7>
38
4.3
<3.7>
39
x
ao
y
4.3
40
4.3
4.3
i
4.3
http://www.xiaoyu163.com
8
•Semiconductors Operation Name
Ref. No.
IC1
IC3
IC151
IC351
IC360
IC501
Q2
Q101
Q201
Q361
Q362
Q364
Q365
Q501
Q503
Transistors:
IC501
No.
Q Q
Volts
No.
Volts
Q2
3
6 7
1 3
0
41
4.8
Q101
4.8
42
0
Q201
4.8
43
4.8
Q361
4.8
44
4.8
Q362-1
4.8
45
2.4
Q362-2
4.8
46
2.4
Q364
4.8
47
4.8
Q365
2
48
4.8
Q501-1
2.3
49
4.8
Q501-2
GND
50
4.8
Q503
1.7
51
4.8
GND
52
4.6
2.5
53
0
4.8
54
0
4.8
55
0
0
56
4.7
*1 (IC1 pin !ª)
0
57
0
0
58
GND
FM
0
59
GND
MW
0
60
GND
LM
0
61
0
0
62
4.9
*2 (TU1 pin 5)
0 <4.8>
63
4.8 <0>
0 <4.8>
64
4.8 <0>
FM
0 <4.8>
65
4.8 <0>
MW
0
66
0
LM
0
67
NC
0
68
NC
0
69
0
2.5
70
5.1 <4.8>
0
71
0
0
72
4.8
0
73
4.8
0
74
0 <4.8>
0
75
4.8
0
76
4.8 <0>
Note:
0
77
4.8
0
78
0
no mark : FM
0
79
4.8
(
u163
0
80
0
<
.
– 25 –
2 9
9 4
2 8
Operation Name
FM/AM PLL
RDS Decoder
Electrical Volume
Tape Equalizer Amp
Loading/Tape Operation
Motor Drive
System Controller
Regulator (for FM/AM PLL)
Tuner Mute
Tuner Mute
Regulator (tape on)
Regulator Control Switch
Capstan/Reel Motor Drive
Capstan/Reel Motor Drive
Tuner Mute Control Switch
Signal Meter Buffer
E
C
B
8.7
13.7
9.4
1 5
0 5
8
2 9
9 4
GND
0
0
GND
0
0
<8.9>
<14.3>
<9.4>
GND
NC
<4.7>
<14.3>
<14.2>
NC
<14.3>
<14.3>
<13.6>
GND
<0>
<4.8>
GND
NC
0
8.7
0
NC
0
5.1
0.4 (0)
fmin - fmax
1.3 - 7.5
2 - 5.3
1.3 - 1.5
fmin - fmax
1.3 - 7.5
2 - 5.3
1.3 - 1.5
m
) : AM
co
> : TAPE PLAYBACK
9 9
2 8
9 9
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