Schematic Diagram - Main Section (1/3) - Sony PMC-DR50 Service Manual

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5-5. SCHEMATIC DIAGRAM – MAIN SECTION (1/3) –
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– 33 –
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PMC-DR50
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Waveforms – MAIN SECTION (1/3) –
z
1
1.5Vp-p
75kHz
VOLT/DIV : 0.5 V AC
IC3 wa
TIME/DIV : 5 msec
8 2 9 9
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.
• f : internal component.
• U : B+ Line.
• H : adjustment for repair.
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
no mark : FM
( ) : AM
• 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.
• Signal path.
F : FM
f
: AM