SONY SW-US301
Service Manual

SS-US301/SW-US301/UZ-US301

5-2.

NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS
Note on Schematic Diagram: � 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. � f : internal component. � 2 : nonflammable resistor. � C : panel designation. Note: The components identified by mark 0 or dotted line with mark 0 are critical for safety. Replace only with part number specified. � A : B+ Line. � Voltages and waveforms are dc with respect to ground under no-signal conditions. no mark : AUDIO ( ) : USB � 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 : AUDIO N : USB

� Waveform � MAIN Board �
1 IC801 r; (X2)

Note on Printed Wiring Boards: � X : parts extracted from the component side. � Y : parts extracted from the conductor side. � f : internal component. � : Pattern from the side which enables seeing. (The other layers' patterns are not indicated.) Caution: Pattern face side: (Conductor Side) Parts face side: (Component Side) Parts on the pattern face side seen from the pattern face are indicated. Parts on the parts face side seen from the parts face are indicated.

4 Vp-p

� Indication of transistor.

C Q BE These are omitted.

119 ns

Q BC E These are omitted.

10

10