SONY RMAV2100
Service Manual

RM-AV2100
4-3. SCHEMATIC DIAGRAM � MAIN SECTION �

(BUZZER)

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. � C : panel designation. � U : B+ Line.

� Waveform

1 IC1 qa XT2
4.6Vp-p

2 IC1 7 X2
4.6Vp-p

� Power voltage is dc 6V and fed with regulated dc power supply from battery terminal. � Voltages and waveforms are dc with respect to ground under no-signal (detuned) conditions. � Voltages and waveforms are dc with respect to ground in playback mode. � 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.

31µs 32kHz

2V/div 20µsec/div

0.5sec 5MHz

2V/div 0.1sec/div

� 23 �

� 24 �