– 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
µ
F unless otherwise noted. pF:
µµ
F
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 M
Ω
).
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
µ
sec
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
