Sony cfd s 28 service manual
This is the 10 pages manual for sony cfd s 28 service manual.
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Extracted text from sony cfd s 28 service manual (Ocr-read)
Page 1
Ð 27 Ð Ð 28 Ð 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 W and 1/4 W or less unless otherwise specified. ¥ ¢ : internal component. ¥U: B+ Line. ¥H: adjustment for repair. ¥ Power voltage is dc 9 V and fed with regulated dc power supply from battery terminal. ¥ Voltages and waveform are dc with respect to ground under no-signal (detuned) conditions. no mark : FM ( ) : AM ¥ Voltages are taken with a VOM (Input impedance 10 MW). Voltage variations may be noted due to normal produc- tion tolerances. ¥ Waveform is taken with a oscilloscope. Voltage variations may be noted due to normal produc- tion tolerances. ¥ Circled numbers refer to waveform. ¥ Signal path. F: FM f: A M 6-5. SCHEMATIC DIAGRAM Ð TUNER Section Ð ¥ See page 45 for IC Block Diagrams. ¥ Waveform 1IC2 @¼ XIN (FM mode) 500 mV/DIV, 5 µs/DIV 1.8 Vp-p 13.3 µs (Page 37) (Page 33¹ )
Page 2
CFD-S28 Ð 32 ÐÐ 33 Ð Ð 34 Ð 6-7. SCHEMATIC DIAGRAM Ð MAIN Section (1/3) Ð ¥ See page 45 for IC Block Diagrams. ¥ Waveforms Ð MAIN Board (1/3) Ð 1Q323 Collector (REC mode) 20 V/DIV, 20 µs/DIV 2Q322 Emitter, Base Q323 Emitter, Base Q324 Collector (REC mode) 5 V/DIV, 20 µs/DIV 3Q324 Base, Q325 Collector (REC mode) 50 mV/DIV, 10 µs/DIV4Q301 Base (REC mode) 500 mV/DIV, 10 µs/DIV 5Q301 Collector (REC mode) 1 V/DIV, 10 µs/DIV 34.4 Vp-p 20.8 µs 9.8 Vp-p 20.8 µs 128 mVp-p 20.8 ms 1 Vp-p 20.8 µs 20.8 µs3.6 Vp-p 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 W and 1/4 W or less unless otherwise specified. ¥2: nonflammable resistor. ¥C: panel designation. ¥U: B+ Line. ¥ Power voltage is dc 9 V and fed with regulated dc power supply from battery terminal. ¥ Voltages and waveforms are dc with respect to ground under no-signal conditions. no mark : TAPE PLAY ( ) : TAPE REC ¥ Voltages are taken with a VOM (Input impedance 10 MW). Voltage variations may be noted due to normal produc- tion tolerances. ¥ Waveforms are taken with a oscilloscope. Voltage variations may be noted due to normal produc- tion tolerances. ¥ Circled numbers refer to waveforms. ¥ Signal path. F: TUNER (FM/AM) E: TAPE PLAY a: TAPE REC J: CD PLAY Note:The components identified by mark ! or dotted line with mark ! are critical for safety. Replace only with part number specified. (Page 28)(Page 36) (Page 37)(Page 44)