Schematic Diagram (Main Section) - Sony CFD-ZW755 Service Manual

CFD-ZW755

5-3. SCHEMATIC DIAGRAM (MAIN SECTION)

r Waveforms (MAIN SECTION)
1
247mVp-p
75kHz
IC2 wa VOLT/DIV : 0.1 V AC
TIME/DIV : 20 µsec
(X-OUT)
2
31.4Vp-p
19.45µsec
ATT : 1/10
VOLT/DIV : 1 V AC
T301
TIME/DIV : 5 µsec
3
3.4Vp-p
19.45µsec
VOLT/DIV : 1 V AC
Q301 C
TIME/DIV : 5 µsec
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.
f
• 1 : fusible resistor.
Note: 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.
• Power voltage is dc 9 V and fed with regulated dc power
supply from battery terminal.
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
no mark : FM (RADIO SECTION),
TAPE PLAY (TAPE SECTION)
( ) : AM (RADIO SECTION),
REC (TAPE SECTION)
• 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
E : PB (DECK B)
a
: REC (DECK B)
d : PB (DECK A)
J
: CD
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Refer to page 40 – 41 for IC Block Diagrams.
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