Read Sony ICF-C723 / ICF-C723L Service Manual online
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ICF-C723/C723L
4-3. SCHEMATIC DIAGRAM (MICROCOMPUTER SECTION)
Note:
• All capacitors are in
• All capacitors are in
µ
F unless otherwise noted. pF:
µµ
F
50 WV or less are not indicated except for electrolytics
and tantalums.
and tantalums.
• All resistors are in
Ω
and
1
/
4
W or less unless otherwise
specified.
•
U
: B+ Line.
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
no mark : RADIO SECTION : FM,
no mark : RADIO SECTION : FM,
VOICE MEMO SECTION : PLAY
(
) : RADIO SECTION : AM (MW),
VOICE MEMO SECTION : REC
• Voltages are taken with a VOM (Input impedance 10 M
Ω
).
Voltage variations may be noted due to normal produc-
tion tolerances.
tion tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
tion tolerances.
• Abbreviation
AUS
: Australian
IT
: Italian
1
IC101
@¢
XOUT
r
WAVEFORM
1.8Vp-p
75kHz
VOLT/DIV : 0.5V AC
TIME/DIV : 5
TIME/DIV : 5
µ
sec
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