SONY STRDE225
Service Manual

THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS. (In addition to this necessary note is printed in each block.)
For schematic diagrams. 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. � % : indicates tolerance. � ¢ : internal component. � 2 : nonflammable resistor. � 1 : fusible resistor. � C : panel designation.
Note: The components identified by mark ! or dotted line with mark ! are critical for safety. Replace only with part number specified. Note: Les composants identifiés par une marque ! sont critiques pour la sécurité. Ne les remplacer que par une pièce portant le numéro spécifié.

For printed wiring boards. Note:
� X : parts extracted from the component side. � ® : Through hole. � ¢ : internal component. � b : Pattern from the side which enables seeing.

� Waveform

1 IC300

32PIN (OSC)

5.2Vp-p

� � � �

�

� � � �

U : B+ Line. V : B� Line. H : adjustment for repair. 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. Circled numbers refer to waveforms. Signal path. F : FM Abbreviation CND : Canadian EE : East European AUS : Australian CH : Chinese G : German MY : Malaysia SP : Singapore EA : Saudi Arabia

8MHz

2 IC201

34PIN (X1)

4.19MHz

4.4Vp-p

�6�