Schematic Diagram - Sony ICF-C253 Service Manual

4-2. SCHEMATIC DIAGRAM

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TO ALARM DIAL
TUNING TUNING
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 / W or less unless otherwise
4
specified.
• f : internal component.
• C : panel designation.
The components identified by mark 0 or dotted
line with mark 0 are critical for safety.
Replace only with part number specified.
• U : B+ Line.
• H : adjustment for repair.
• Voltages are dc with respect to ground under no-signal
(detuned) conditions.
no mark : FM
( ) : AM
∗
: Impossible to measure
• Voltages are taken with a VOM (Input impedance 10 MΩ).
Voltage variations may be noted due to normal produc-
tion tolerances.
• Signal path.
F : FM
f
: AM
• Waveform
C116
0.1
1
IC100 wf (XOUT)
2Vp-p
1V/div
14µsec
10µsec/div
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ICF-C253