– 55 – – 56 – – 58 –– 57 –
ICF-SW07
5-7. PRINTED WIRING BOARDS (MICROCOMPUTER SECTION)
Ref. No. Location
r
Semiconductor
Location
D501 C-2
D502 D-3
D503 D-3
D504 D-2
D505 D-2
D506 B-2
D507 C-2
IC501 B-3
IC502 C-5
IC503 B-5
IC504 C-2
IC505 B-2
IC506 D-2
IC507 C-3
IC508 D-3
Q501 C-4
Q502 C-4
Q503 C-4
Q504 C-3
Q505 C-3
Q506 C-3
Q507 D-2
Q508 D-2
Note:
• X : parts extracted from the component side.
•
r
: Through hole.
• b : Pattern of the rear side.
• b : Pattern on the side which is seen.
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
/
4
W or less unless otherwise
specified.
• U : B+ Line.
• H : adjustment for repair.
• Power voltage is dc 3V and fed with regulated dc power
supply from external power voltage jack.
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
no mark : FM
• Voltages are taken with a VOM (Input impedance 10 MΩ).
Voltage variations may be noted due to normal produc-
tion tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
• Circled numbers refer to waveforms.
• The voltage isn't filled in the measurement impossibility
place.
1
X502
VOLT/DIV : 0.2 V AC
TIME/DIV : 10 µsec
732 mVp-p
32.768 kHz
r
Waveform
5-8. SCHEMATIC DIAGRAM (MICROCOMPUTER SECTION)
w
w
w
.
x
i
a
o
y
u
1
6
3
.
c
o
m
Q
Q
3
7
6
3
1
5
1
5
0
9
9
2
8
9
4
2
9
8
T
E
L
1
3
9
4
2
2
9
6
5
1
3
9
9
2
8
9
4
2
9
8
0
5
1
5
1
3
6
7
3
Q
Q
TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com
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