Schematic Diagram – Rx Section - Sony WCS-999 Service Manual

4-6. SCHEMATIC DIAGRAM – RX Section – •
See page 22 for IC Block Diagrams.
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Note on Schematic Diagram: • Voltages and waveforms are dc with respect to ground
• All capacitors are in µF unless otherwise noted. pF: µµF
under no-signal conditions.
50 WV or less are not indicated except for electrolytics no mark : without the signal
and tantalums.
( ) : receive the signal
• All resistors are in Ω and
1
/ W or less unless otherwise • Voltages are taken with a VOM (Input impedance 10 MΩ).
4
specified.
Voltage variations may be noted due to normal produc-
• C : panel designation.
tion tolerances.
• U : B+ Line.
• Waveforms are taken with a oscilloscope.
• H : adjustment for repair.
Voltage variations may be noted due to normal produc-
• Power voltage is dc 1.5 V and fed with regulated dc power
tion tolerances.
supply from battery terminal. • Circled numbers refer to waveforms.
• Signal path.
J : RX
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• Waveforms
– TX BASE Board – – RX BASE Board –
1 IC51 8 (XTALE) 1 IC101 2 (OUT)
200 mV/DIV, 20 ns/DIV 2 V/DIV, 5 µs/DIV
580 mVp-p
10.2 µ s
CH-1 : 35.05 ns
CH-2 : 35.02 ns
CH-3 : 35.00 ns
2 IC101 3 (EXT)
2 V/DIV, 5 µs/DIV
3 Vp-p
10 µ s
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WCS-999
3.9 Vp-p