Sony 757MX Service Manual - Page 51
Note on Printed Wiring Board, Note on Schematic Diagram - cdx repair
UPC - 027242597846
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CDX-757MX • DIAGRAMS NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS Note on Printed Wiring Board: • 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. 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 Ω and 1/4 W or less unless otherwise specified. • f : internal component. • C : panel designation. • A : B+ Line. • H : adjustment for repair. • Power voltage is dc 14.4V and fed with regulated dc power supply from CD changer controller. • Voltages and waveforms are dc with respect to ground in CD play conditions. no mark : CD PLAY • Voltages are taken with a VOM (Input impedance 10 MΩ). 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. J : CD PLAY 2