Sony 1000RF Service Manual - Page 15

4-5. CIRCUIT BOARDS LOCATION DISC IN SW board SUB board LIMIT SW board LOAD SW board DISPLAY board MAIN board SERVO board 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 Ω and 1/4 W or less unless otherwise specified. • % : indicates tolerance. • 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. • U : B+ Line. • H : adjustment for repair. • Power voltage is dc 14.4V and fed with regulated dc power supply from ACC and BATT cords. • 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. F : FM f : AM J : CD for printed wiring boards: • X : parts extracted from the component side. • b : Pattern from the side which enables seeing. • Waveforms (MODE:PLAY) 1 0V Approx. 620mVp-p IC2 1 (FEO) 2 1.2Vp-p IC2 ea (RFO) 3 0V Approx. 200mVp-p IC2 rs (TEO) 4 2.6Vp-p 7.6µsec IC1 3 (MDP) 5 5.8Vp-p 22.7µsec IC1 w; (LRCK) 6 5.7Vp-p 474nsec IC1 ws (BCK) 7 3.2Vp-p 16.89MHz IC1 ef (XTAI) 15 15