Sony cfs 616 s service manual
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Extracted text from sony cfs 616 s service manual (Ocr-read)
Page 1
CFS-616S Ð 21 ÐÐ 22 ÐÐ 23 Ð 6-4. SCHEMATIC DIAGRAM Ð TUNER Section 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. ¥C: panel designation. ¥U: B+ Line. ¥H: adjustment for repair. ¥ Power voltage is dc 9V and fed with regulated dc power supply from battery terminal. ¥ Voltages are dc with respect to ground under no-signal (detuned) conditions. no mark : FM ( ) : MW < > : SW ¥ Voltages are taken with a VOM (Input impedance 10 MW). Voltage variations may be noted due to normal produc- tion tolerances. ¥ Signal path. F: FM/SW f: MW ¥ Abbreviation EA: Saudi Arabia model. VCO REGULATOR FM FRONT-END AM FRONT-END MPX REGULATOR MONO/STEREO SELECT DECORD AMP MUTING AUTO BLEND TUNING INDICATOR AM IF/ DET FM IF/ DISCRI RIPPLE FILTER BAND-PASS MUTE 1 27 28 29 30 24 25 26 2122 23 181920 16 17 2 3 4 5 6 7 8 9 PLL LPF1 PILOT DET LPF2 PILOT DET LPF2 ST IND/VCO CHECK L-CH OUT VCC R-CH OUT RIPPLE FILTER AGC AFC1 10 AGC AFC2 13 FM IF IN 14 AM IF IN 15 BAND SELECT 11 GND 12 TUNE IND 1/2 COUNTER 1/2 COUNTER PD1 PD2 FM/AM FE OUT FM GNDFM RF IN AM RF IN FM RF REG FM OSC AFC AM OSC MUTE FM DISCRI GND PLL LPF2 MPX REG VCO ¥ IC Block Diagram IC1 CXA1238S
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CFS-616S Ð 27 ÐÐ 28 ÐÐ 29 ÐÐ 30 Ð 6-6. SCHEMATIC DIAGRAM Ð MAIN Section Ð ¥ See page 31 for IC Block Diagrams. 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. ¥C: panel designation. ¥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 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 nor mal produc- tion tolerances. ¥ Waveforms are taken with a oscilloscope. Voltage variations may be noted due to nor mal produc- tion tolerances. ¥ Circled numbers refer to waveforms. ¥ Signal path. F: TUNER E: TAPE PLAY (DECK A) d: TAPE PLAY (DECK B) G: TAPE REC (DECK B) N: MIC INPUT Note:The components identified by mark ! or dotted line with mark ! are critical for safety. Replace only with part number specified. ¥ Waveforms Ð MAIN Board Ð 1T301 (REC mode) 10V/DIV, 5 µs/DIV 2T301 (REC mode) 1V/DIV, 5 µs/DIV 45.2 Vp-p 14.4 ms 4.8 Vp-p 14.4 ms