Sony CFD-S28 - Schematic Diagram - Tuner Section

– 27 –
– 28 –
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
/
4
W or less unless otherwise
specified.
•
¢
: internal component.
• 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 waveform 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.
• Waveform is taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
• Circled numbers refer to waveform.
• Signal path.
F : FM
f : AM
6-5. SCHEMATIC DIAGRAM – TUNER Section – • See page 45 for IC Block Diagrams.
• Waveform
1 IC2 @º XIN (FM mode)
500 mV/DIV, 5 µs/DIV
1.8 Vp-p
13.3 µ s
(Page 37)
(Page 33π )