SONY TAFB720R/FB820R
Manual de Servicio

SECTION 3 DIAGRAMS
3-1. CIRCUIT BOARDS LOCATION
THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS. (In addition to this, the 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

WAVEFORM 1
3.8Vp-p

4MHz

IC902 1 XOUT

PS board

OUTLET board

SP-TM board

specified. � ¢ : internal component. � 2 : nonflammable resistor. � 5 : 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.

SIRCS board PHONO board
� � � �

SIRCS SUB board

HP board

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 : POWER ON � 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 : TUNER

SP-SW board

INPUT board MAIN board VOL board

PANEL board

For printed wiring boards.
Note: � X : parts extracted from the component side. � Y : parts extracted from the conductor side. � b : Pattern from the side which enables seeing.

� Indication of transistor

BC E These are omitted

�5�

�6�