Sony ICF-C1200 Service Manual page 11

Note on Schematic Diagram: MAIN SECTION
• 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
• : B+ Line.
• H : adjustment for repair.
• Power voltage is dc 3V 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
( ) : 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
: Analog
f
: Digital
• Abbreviation
JE : Tourist
Waveforms
z
1
1.3Vp-p
75kHz
IC301 ua XOUT
VOLT/DIV : 0.5 V AC
TIME/DIV : 2 µsec
2
33Vp-p
190nsec
VOLT/DIV : 10 V AC
T401
TIME/DIV : 0.2 µsec
3
5Vp-p
190nsec
VOLT/DIV : 1 V AC
Q401 C
TIME/DIV : 0.2 µsec
ICF-C1200
11