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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
1
/
4
specified.
• : panel designation.
•
: B+ Line.
• Power voltage is dc 14.4 V and fed with regulated dc power
supply from battery and accessory terminals.
• Voltages are dc with respect to ground under no-signal
(detuned) conditions.
• Voltages are taken with a VOM (Input impedance 10 MΩ).
Voltage variations may be noted due to normal production
tolerances.
• Signal path.
: FM
: BUS AUDIO IN
• Smiconductors Pin Voltage
ICs:
No.
IC571
IC601
IC701
1
4.8
NC
4.7
2
4.8
4.8 <0>
0
3
GND
4.8 <0>
5.9
4
4.8
0
5
5.6
NC
6
13.8
2.4
7
14.4
GND
8
13.7 <0>
2.4
9
8.7
2.4
10
0.2 (8.7)<0>
4.8
TE
11
8.7 (0.2)<0>
4.8
L 13942296513
12
GND
0
13
4.9
14
4.8
Note:
no mark : FM
(
) : AM
<
> : TAPE PLAYBACK
www
.
http://www.xiaoyu163.com
W or less unless otherwise
Transistors:
No.
E
C
B
Q3-1
GND
NC
6.3 <0>
Q3-2
14.4
13.4 <0.6>
NC
Q102
GND
0
0
Q103
GND
0
0
Q202
GND
0
0
Q203
GND
0
0
Q581-1
GND
NC
0
Q581-2
14
0
NC
Q603
10.1
14.4
10.7
Q605-1
GND
NC
4.8
Q605-2
14.4
14.3
NC
Q606
4.8
4.8
4.8
Q608
4.8
4.8
4.8
Q609
5.1
13.7
5.6
Q610
GND
0
0.6
Q701
GND
4.8
0
x
ao
y
i
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8
•Semiconductors Operation Name
Ref. No.
Operation Name
IC571
Reset Signal Generator
IC601
Regulator
IC701
Bus Interface (for SONY bus)
Q3
Regulator control switch
Q102
Line Mute
Q103
Line Mute
Q202
Line Mute
Q203
Line Mute
Q581
Line Mute Control Switch
Q603
Regulator (for illumination)
Q605
Regulator Control Switch
Q606
B+ Switch
Q608
B+ Switch
Q609
Regulator (for tuner)
Q610
Accessory Check
Q701
Battery Check
Q Q
3
6 7
1 3
u163
.
– 26 –
2 9
9 4
2 8
1 5
0 5
8
2 9
9 4
m
co
9 9
2 8
9 9
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