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service manual fm/am cassette car stereo

1. o oo 38 SEKOUT O Seek control signal output to the FM AM tuner unit TUD o 39 MW SW MW SW selection signal output to the FM AM tuner unit TUI L 40 BEP O Beep sound output terminal 15 Input of acknowledge signal for the key entry Acknowledge signal is input to accept function 41 KEYACK I eqq and eject keys in the power off status at input of H 42 BU IN Battery detect signal input terminal H battery on METAL control in out terminal At initial mode auto manual mode selection input of METAL function L manual mode 43 MTLSEL At manual mode METAL on off control signal output terminal output METAL At auto mode input at MTLIN pin 69 Not used this function in this set fixed at H Dolby control in out terminal At initial mode valid invalid selection input of dolby function L input valid 44 DOLON I O app At normal mode dolby on off control signal output H output dolby on Not used this function in this set fixed at H 45 AMSIN I Whether a music is present or not from CXA2509AQ IC301 is detected at auto music sensor L music is present H music is not present Input of FM stereo detection signal from FM AM tuner unit TUI and output of forced 46 ST monaural control signal to FM AM tuner unit TU1 Commonly used for stereo display input and forced monaural output FM stereo d
2. 3918 IC611 H power 13 MT o Line muting control signal output terminal H line muting on Ne 4 VOLCE O Chipenable signal output to the electrical volume C331 Is O Serial data transfer clock signal output to the electrical volume C331 6 VOLSO O Serial data output to the electrical volume C33 17 EO j O f Sta tre MM RR 18 AMPMUT Muting control signal output to the power amplifier 1C751 L muting on 19 DX LO Local DX selection signal output to the FM AM tuner unit TUI L DX H local 20 AM MONO o AM forced monaural signal output terminal Not used open 2 GND Destination setting terminal frequency select switch 8502 input terminal 22 DSTSEL I un L AM 9k step or FM 50k step H AM 10k step or FM 200k step 23 DBASIN D BASS switch SW951 input A D input Key input terminal A D input 24 KEYINI I INTRO 1 REPEAT 2 SHUF 3 BL SKIP 6 5 4 PRESET DISC keys input LSW92 to LSW927 LSW929 and LSW930 ram Key input terminal A D input 25 KEYINO I OFF SOURCE MODE 4 PP PPI SEEK AMS 44 49 SEEK AMS VOLUME SEL VOLUME DSPL BTM LCL keys input LSW901 to LSW912 26 27 28 29 30 vpp2 Powersupply terminal SV 31 32 3 Groundterminl 0 O jNeued pe o O 8 Eoi 0 Main charge pump control signal output terminal o 36 37 Nco
3. SERVICE MANUAL XR C5090 E Model Refer to RM X4S SERVICE MANUAL 9 925 698 11 issued previously for information of remote commander RM X4S supplied with this set Model Name Using Similar Mechanism XR C340 Tape Transport Mechanism Type MG 25F 136 SPECIFICATIONS Cassette player section Power amplifier section Tape track 4 track 2 channel stereo Outputs Speaker outputs Wow and flutter 0 08 WRMS sure seal connectors Frequency response 30 18 000 Hz Speaker impedance 4 8 ohms Signal to noise ratio 58 dB Maximum power output 40 W x 4 at 4 ohms Tuner section FM Tuning range FM tuning interval 50 kHz 200 kHz switchable 87 5 108 0 MHz at 50 kHz step 87 5 107 9 MHz at 200 kHz step Antenna terminal External antenna connector Intermediate frequency 10 7 MHz Usable sensitivity 8 dBf Selectivity 75 dB at 400 kHz Signal to noise ratio 65 dB stereo 68 dB mono Harmonic distortion at 1 kHz 0 5 stereo 0 3 mono Separation 35 dB at 1 kHz Frequency response 30 15 000 Hz Capture ratio 2 dB AM Tuning range AM tuning interval 9 kHz 10 kHz switchable 531 1 602 kHz at 9 KHz step 530 1 710 kHz at 10 kHz step Antenna terminal External antenna connector Intermediate frequency 10 71 MHz 450kHz Sensitivity 30 MICROFILM General Outputs Power antenna control lead Power amplifier control lead Telephone ATT control lead Rear line out 1 Tone
4. controls Bass 8 dB at 100 Hz Treble 8 dB at 10 kHz Power requirements 12 V DC car battery negative ground Dimensions Approx 188 x 58 x 181 mm w h d Mounting dimensions Approx 182 x 53x 164 mm w h d Mass Approx 1 2 kg Supplied accessories Parts for installation and connections 1 set Front panel case 1 Rotary commander RM X4S Design and specifications are subject to change without notice FM AM CASSETTE CAR STEREO ON Y SECTION 6 DIAGRAMS 6 1 IC PIN FUNCTION DESCRIPTION MAIN BOARD 501 uPD17708GC 567 3B9 SYSTEM CONTROLLER 2 3 E Tape position detect input from tape operation switch on the mechanism block 4 6 TAPEON Tape system power supply on off control signal output terminal H tapeon 7 CMON O Capstan reel motor M901 drive signal output terminal H motoron 9 LM LOD Loading tape operation motor control signal output to the LB1638M IC351 For the loading direction and forward side operation 1 Loading tape operation motor control signal output to the LB1638M IC351 LM EJ pn For the eject direction and reverse side operation 1 10 TUNON Tuner system power supply on off control signal output to the BA3918 IC611 H tuner on 11 FM ON FM system power supply on off control signal output to BA3918 IC611 FM 12 PW ON Main system power supply on off control signal output to the BA
5. etection at input of L forced monaural at output of L 47 AMS ON Tape auto music sensor control signal output to the CXA2509AQ IC301 L is output to lower the gain for audio level at FF REW Forward reverse direction control signal output to the CXA2509AQ IC301 48 N R OUT L forward direction H reverse direction 49 TAPMUT o Tape muting on off control signal output to the CXA2509AQ IC301 H tape muting on Power supply on off control signal output terminal at the illumination and liquid crystal display driver IC901 power on i re At 4 2 on mode H output at the accessory on At power select switch S501 off mode H output at the power 5 Station detector detect input from the FM AM tuner unit TU1 Stop level for SEEK BTM etc is determined SD is present at input of H 52 Detects removal of attaching and removing type front panel block L attaching 53 Telephone muting signal input terminal At input of L the signal is attenuated by 20 dB 54 55 Accessory detect signal input terminal L accessory on 56 Setting terminal for the test mode L test mode normally fixed at H 57 Power select switch S501 input terminal L position A ee a position B operation mode s oppi ben iier er NM 60 ADON O Power supply on off control signal output for the A D conversion T 62 63 I Setting terminal for the illuminatio
6. n color L amber H green fixed at H 64 LCDCE O Chip enable output to the liquid crystal display 90 6 LCDCKO O Serial data transfer clock signal output to the liquid crystal display driver C901 66 LCDSO o Serial data output to the liquid crystal display driver 1 901 67 LCDINH Blank indicate control signal output to the liquid crystal display driver IC901 L no display 68 UNICKI erial data reading clock signal input terminal for SONY bus 5 Serial data output to bus interface 1 581 for SONY bus AG 69 UNISO 70 UNISI Serial data input from the bus interface 1 581 for SONY bus 71 UNICKO O Serial data transfer clock signal output to the bus interface 1 581 for SONY bus 12 BUSON Bus on off control signal output to the bus interface IC581 for SONY bus L bus 73 SYSRST O Reset signal output to the bus interface IC581 for SONY bus L reset 74 VREG CPU regulator output terminal Connected to capacitor Ground terminal 76 xor Main system clock output terminal 4 5 MHz 77 Main system clock input terminal 4 5 MHz 78 CPU chip enable signal input fixed at H 19 Power supply terminal 5V ae System reset signal input from the reset signal generator 1 551 and reset switch S551 80 RESET 66 55 ec 99 L is input for several 100 msec after power on then it changes t
7. o H 1 loading tape operation motor control STOP LOADING EJECT BRAKE TERMINAL FORWARD REVERSE LM LOD Gn 9 DE n O Block Diagrams MAIN Board IC301 CXA2509AQ T4 2 g 2 2 P oS 2 8 O e lt Q a Z gt 30 29 28 27 26 24 030201 24dB 20 MSMODE Lou uoe H 99 sta ER PBREF1 33 TAPE EQ NC FWD RVS T vec CQ 5 15 NC OFF fp a 12 MSTC T 11 G1FB Z D Lu 2 1 2 MSOUT PBREF2 DGND PBRIN2 PBFB2 LL o 8 z 2 ca o ux D O a 2 IC331 LC75373ED 29 IC351 LB1638M 581 8270 2 BUS ON VCC SWITCH SWITCH 8 88 BATTERY D 22 SWITCH 9 BU IN O O Z Q O 611 BA3918 V2 REGULATOR OVER VOLTAGE PROTECT 40

service manual fm/am cassette car stereo

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