SONY SBV55A
Service Manual

SB-V55A

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 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. � % : indicates tolerance. � f : internal component. � C : panel designation. � A : B+ Line. � Power voltage is dc 6V and fed with regulated dc power supply from external power voltage jack. � 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 L : VIDEO J : CHROMA c :Y for printed wiring boards: � X : parts extracted from the component side. � Y : parts extracted from the conductor side. � z : Through hole. � : Pattern from the side which enables seeing. (The other layer�s patterns are not indicated.) Caution: Pattern face side: (Side B) Parts face side: (Side A) 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.

� Waveforms

1
0.35Vp-p

503.5kHz

IC3

7

(OSC IN2)

2
2.2Vp-p

4MHz

IC5

qs

(XIN)

3
0.1Vp-p

3.58MHz

IC7

4

(X)

7

7