Schematic Diagram (Main Section) - Sony ICF-SW07 Service Manual

r Waveforms (MAIN Section)
Note:
• All capacitors are in µF unless otherwise noted. pF: µµF
1
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.
1.8 Vp-p
• ¢ : internal component.
• U : B+ Line.
• H : adjustment for repair. 75 kHz
• Power voltage is dc 3V and fed with regulated dc power
supply from external power voltage jack.
VOLT/DIV : 0.5 V AC
IC402 @¢
• Voltages and waveforms are dc with respect to ground
TIME/DIV : 5 µsec
under no-signal (detuned) conditions.
no mark : FM
2
( ) : MW/LW
< > : SW
[ ] :AM EXT ANT CONNECTED
• Voltages are taken with a VOM (Input impedance 10 MΩ).
3.8 Vp-p
Voltage variations may be noted due to normal produc-
tion tolerances.
• Waveforms are taken with a oscilloscope.
377 nsec
Voltage variations may be noted due to normal produc-
tion tolerances.
VOLT/DIV : 1 V AC
• Circled numbers refer to waveforms. Q406 C
TIME/DIV : 0.1 µsec
• Signal path.
F : FM
3
f : SW
L : MW/LW
5 Vp-p
594 nsec
VOLT/DIV : 1 V AC
Q408 C
TIME/DIV : 0.2 µsec
– 45 –

5-4. SCHEMATIC DIAGRAM (MAIN SECTION)

r Refer to page 63 for IC Block Diagrams.
– 46 – – 47 – – 48 – – 49 –
ICF-SW07