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2-3. DC FAN MOTOR
4
Two screws
(BTP 3x14)
5
DC fan motor
(M901)
3
Heat sink sub (A)
1
Four screws
(K 3x10)
Main baord
CN502
2
Connector (CN502)
– 5 –
SECTION 3
DIAGRAMS
THIS NOTE IS COMMON FOR PRINTED WIRING
BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is printed
in each block.)
For schematic diagrams.
Note:
• 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
/
W or less unless otherwise
4
specified.
•
: internal component.
¢
• C : panel designation.
• U : B+ Line.
• Power voltage is dc 14.4V and fed with regulated dc power
supply from ACC and BATT cords.
• Voltage and waveforms are dc with respect to ground
under no-signal conditions.
no mark : POWER ON
∗
: Impossible to measure
• 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.
F
: AUDIO
For printed wiring boards.
Note:
• X : parts extracted from the component side.
•
: internal component.
¢
3-1. IC BLOCK DIAGRAMS
IC101 µPC4570G2
14
13
12
11
10
9
8
B-
B+
1
2
3
4
5
6
7
IC602 LM2904M
8
7
6
5
1
2
3
4
XS-AW850
• WAVEFORMS
1
14Vp-p
27 µ sec
2
29Vp-p
27 µ sec
3
29Vp-p
27 µ sec
4
60Vp-p
27 µ sec
IC901 µPC494GS
16 15
14
13
12 11
10
9
REG.
REF.
ERROR
ERROR
OSC
0.1V
1
2
3
4
5
6
7 8
– 6 –
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