Sony st sp 55

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4 SECTION 3 DIAGRAMS 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 diagrams. Note: - 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. - f : internal component. -C: panel designation. For printed wiring boards.Note: -X: parts extracted from the component side. -Y: parts extracted from the conductor side. - a : Through hole. -b: Pattern from the side which enables seeing. (The other layers' patterns are not indicated.)-U: B+ Line. -V: B-“ Line. -H: adjustment for repair. - no mark : FM -ˆ— : Can not be measured. - Voltages are taken with a VOM (Input impedance 10 M-„¦). 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: FM J: CD d: TAPE G: REC (TAPE/MD) j: MD - Abbreviation MY : Malaysia model. SP : Singapore model. HK : Hong Kong model. KR : Korea model. AED : North European model. - Indication of transistor C These are omitted E B QC These are omitte d E B Note: The components identified by mark 0 or dotted line with mark 0 are critical for safety. Replace only with part number specified. 1 IC701 qa XCOUT 2 IC701 qd XOUT 30.5µsec 100nsec 2.7Vp-p 4.6Vp-p - WAVEFORMS -“ MAIN BOARD -“ MAIN board PANEL boardLED boardPIN JACK boar d tuner unit (FM/AM) 3-1. CIRCUIT BOARDS LOCATION

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ST-SP55 5 5 3-2. BLOCK DIAGRAM : FM : CD : MD : TAPE : REC (TAPE/MD) - Signal Path - R-ch is omitted due to same as L-ch. Q291 +10V REG 75 61 VOL-DATA FUNC160 FUNC2 58 13 FUNC INHIBIT 72 DSG-OFF76 PRE-MUTE77 HP-MUTEHP-MUTE78 TA-STANDBY79 PWR-RELAY80 SP-RELAY 86 VOL-ENC-A87 VOL-ENC-BDSG-OFF XPRE-MUTE ON/STBY P-RELAY S-RELAY ENC0 ENC1 TA-KEY X0 X1 X2 X3 AUXH-L AUXL-L TC-L 74 VOL-CLK 73 VOL-LAT 14131211 DI CONTROL CL CE 44PAUSE-LED43PLAY-LED42CD-XLT41SENSE40LOAD-IN39LOAD-OUT38BD-POWER37CD-CLK 35CD-DATA34LPC-HOLD33SQCLK32SQDATA19SCOR95CDM-SW 92KEY3 91 KEY2 LED1 LED0 CD-XLAT SENS LOAD-OUT LOAD-IN CD-POWER CD-CLK CD-DATA HOLD SQCK SQSO SCOR CDM-SW CD-KEY P-DOWN OUT PCPON IIC-DAT IIC-CLK 10 9 109 6 17 6 8 1 6 4 8 2 5 1 11101412 3 56789101112131415161718194 111013912 1516 14 4 5 1 3 17 16 19 15 12141511 5 3 1 BUFFER IC231 Q201 Q221 MUTE 1302 51 RO-MUTE AUX Q301 +11V REG. 3 2 IC282 -7V REG. IC281 +7V REG. 3 1 IC283 +5V REG. 3 1 L R AUX OUT L R AUX IN +5V SWITCH Q281,282 CD L IIC-CLK IIC-DATAPCPON PDOWNTC-RTC-L MD-RMD-L REC RREC L CD R CDKEY PLAY LED PAUSE LED D ATA XLAT CLOK HOLD SQSO SENS SQCK SCOR CD MSW LOAD-IN LOAD-OUTCD-KEY LED0 LED1 CD-DATA CD-XLAT CD-CLK HOLD SQSO SENS SQCK SCOR CDM-SW CD-PWR + UBREG(L) LOAD-IN LOAD-OUT UNREG(L) +5V SYSTEM CONTROL 2 (TO CDP-SP55)SYSTEM CONTROL 1 (FROM TA-SP55) SYSTEM CONTROL 3 SYSTEM CONTROL 3 TO TC-SP55/ MDS-SP55 TO TC-SP55/ MDS-SP55 CN203(1/2)J210(2/2) CN203(2/2)CN201 J210(1/2) CN205 +UNREG(L) +UNREG(L) -UNREG +13.5V(REG) +5.6V(UNSW) TA-KEY/HPSW ENC1 ENC0 XS-RELAY P-RELAY ON/STBY/AMP-MUTE HP-MUTE XPRE-MUTE R L DSG-OFF -UNREG(L) +UNREG(H) D+5.6V(UNSW) LSELO LIN LOUT IC401 INPUT SELECT/EVR ST-L L1 L2 L3 L4 MD-L CD-L SEL-L R-CH R-CH R-CH R-CH +5VR-CH R-CH R-CH PDOWN PCPON DATA CLK IC701 MASTER CONTROL +10V -7V +7V +5V+5V +UNREG(L) CONTROL X A B INH IC202 INPUT SELECTOR 09 D950-957 654 DATA SCK STB 1 VDD 3 VREF 1 OUT DPDATA DPCLK DPCS LCD DISPLAY UNITIC901 REMOTE COMMANDER RECEIVER B+ SWITCH LED DRIVE +5V +5V Q704 Q701,702 Q705,706 -“7V BACK LIGHTILL(-7V) 844DP PWR BL DIMMER 123 DP DATA DP CLK DP CS 83DP PWR 88 SIRCS 89 90 KEY0 KEY1 2120 2423 27 18 26 28 25 RDS DATARDS INT TUNED STEREO ST MUTE ST DIN ST DOUT ST CLKST CE S923 S922 S921 S920 S910TUNING MODE TUNING -“ TUNER/ BAND TUNING + DISPLAY 85673029 TUNER UNIT RDS DATARDS INT TUNED STEREO ST MUTE ST DIN ST DOUT ST CLKST CE FM 75-„¦ G AM