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

5-7. SCHEMATIC DIAGRAM – MAIN SECTION (3/3) –
Waveforms – MAIN SECTION (2/3) –
r
1
60Vp-p
57kHz
ATT : 1/10
VOLT/DIV : 1V AC
L301
TIME/DIV : 5 µsec
2
15Vp-p
57kHz
VOLT/DIV : 5 V AC
Q301 C
TIME/DIV : 5 µsec
Note on Schematic Diagram – Main Section (2/3) – :
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.
• U : B+ Line.
• H : adjustment for repair.
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
no mark : COMMON (REC)
( ) : PLAY
• 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
E : PB
a : REC
J : CD
Note on Schematic Diagram – Main Section (3/3) – :
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.
• U : B+ Line.
• Voltages are dc with respect to ground under no-signal
(detuned) conditions.
no mark : FM
• 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
c : digital out
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PMC-DR50L/DR70L
– 47 –