SONY SRFDR2000
Instrukcja Serwisowa

4-4. SCHEMATIC DIAGRAM (MAIN SECTION)

r

Refer to page 23 for IC Block Diagrams.

SRF-DR2000

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 � and 1/4 W or less unless otherwise � � � � � specified. ¢ : internal component. U : B+ Line. H : adjustment for repair. Power voltage is dc 3 V and fed with regulated dc power supply from external power voltage jack. Voltages and waveforms are dc with respect to ground under no-signal (detuned) conditions. no mark : FM Voltages are taken with a VOM (Input impedance 10 M�). Voltage variations may be noted due to normal production tolerances. Waveforms are taken with a oscilloscope. Voltage variations may be noted due to normal production tolerances. Circled numbers refer to waveforms.

� Signal path. F : FM J : Multiplex

r WAVEFORM

(MAIN SECTION)

r WAVEFORMS

(MICOM SECTION)

1
1.7Vp-p

1

Power failure at

2
1.8Vp-p

3
2.5Vp-p
2.4Vp-p

4.9152MHz
75kHz
VOLT/DIV : 0.5 V AC TIME/DIV : 5 µsec VOLT/DIV : 0.5V AC TIME/DIV : 0.1 µsec

4.9152MHz
VOLT/DIV : 0.5V AC TIME/DIV : 0.1µsec

8.192MHz
VOLT/DIV : 0.5V AC TIME/DIV : 0.1µsec

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IC204 #º

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