Schematic Diagram - Main Section (1/3) - Sony PMC-DR50L Service Manual

5-5. SCHEMATIC DIAGRAM – MAIN SECTION (1/3) – r Refer to page 74 for IC Block Diagram.
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PMC-DR50L/DR70L
Waveforms – MAIN SECTION (1/3) –
r
1
1.5Vp-p
75kHz
VOLT/DIV : 0.5 V AC
IC3 @¡
TIME/DIV : 5 msec
2
556mVp-p
4.332MHz
VOLT/DIV : 0.2 V AC
IC4 !¢
TIME/DIV : 50 nsec
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.
• ¢ : 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
( ) : MW
< > : LW
• 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 : MW
L : LW
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