Kenwood-KDC-2027-SG-Service-Manual电路原理图.pdf

© 2003-11 PRINTED IN JAPANB53-0104-00 (N)1839CD RECEIVERKDC-2027SA/SAY/SG/SGYKDC-3027A/AY/G/GYKDC-308A/AY/G/GYKDC-4027/V/VY/YKDC-F327A/GSERVICE MANUALCD mechanism extension cord (22PIN) : W05-0618-00M.RDMEXTERNAL MEDIA CONTROLCLK MENUSCANAUDRDM REPOFFLOUDTIPTY +-AUTOCLK MENUSCANAUDRDM REPOFFLOUDTIPTYAUTOCLK ADJSCANAUDRDM REPOFFLOUDAMEMONOEscutcheon(B07-3001-02)Plastic cabinet assy(A02-1486-13)Mounting hardware assy(J21-9716-03)DC cord(E30-6132-05)(E30-6286-05)Antenna adaptor(T90-0523-05)Lever(D10-4589-04) x 2Front glass KDC-4027/V/VY/Y (B10-4459-01)Panel assy KDC-4027/V/VY/Y (A64-3165-02)Front glass KDC-3027A/AY/G/GY (B10-4460-01)KDC-308A/AY/G/GY (B10-4461-01)KDC-F327A/G (B10-4463-01)Panel assy KDC-3027A/AY/G/GY (A64-3166-02)KDC-308A/AY/G/GY (A64-3167-02)KDC-F327A/G (A64-3169-02) Front glass KDC-2027SA/SAY/SG/SGY (B10-4462-01)Panel assyKDC-2027SA/SAY/SG/SGY (A64-3168-02)TDF PANEL INFORMATIONMODEL PARTS NO. PANEL NAMEKDC-2027SA/SAY Y33-1960-64 TDF-2027SAKDC-2027SG/SGY Y33-1960-65 TDF-2027SGKDC-3027A/AY/G/GY Y33-1960-62 TDF-3027KDC-308A/AY/G/GY Y33-1960-63 TDF-308KDC-4027/Y Y33-1960-60 TDF-4027KDC-4027V/VY Y33-1960-61 TDF-4027VKDC-F327A/G Y33-1960-66 TDF-F327VOLAUTOVOLSCRL2KDC-2027SA/SAY/SG/SGY, 3027A/AY/G/GYKDC-308A/AY/G/GY, 4027/V/VY/Y, F327A/GBLOCK DIAGRAMS1(LOS SW)S2(12EJE SW)(LOE & LIM SW)S4(8EJE SW)LPFLPFIC1MECHANISMCONTROL ICS35V SWQ23.3V AVRIC2IC3DSP/DAC ICCD RF/SERVO/Q3APCQ4SWIC44ch BTLDRIVERLDPDCFABETR COILFO COILMMDM1DM2SPINDLEMOTORLOADINGMOTOR& SLEDOPTICAL PICKUPDPU1 :BU5V 15DGND 14DATACLK1819MUTERMUTEL 1213MSTOPMRST 1110LOS SW 2021SW18EJE SW 17A8V 9Lch 8AGND 7DOUTRch2264MOTORLO/EJ 5SGNDS7.5V 32NC 1612EJE SWMSTOPDATAMRSTMUTELMUTERCLKPONSERCHLOE&LIMLOE & LIMSWPONINTQSIAODSP RESETSTBSCKDRV MUTESOCNTLRSTSISCKSTBAOINTQSOMD+SD+TD+FD+LZM RZM ROUTLOUTTXX14.19MHzZ MUTE L Z MUTE R16.934MHzX2ABCDEPRE OUTFLD PDFDIN-BIASCNTTR+TR-FO-FO+SLD+SLD-SPD-SPD+TDIN- SPIN-SLIN+MUTELO/EJOPENOPENBU5VSW5VSW3.3VS7.5VVREFCD PLAYER UNIT (X32-5490-00)KDC-2027SA/SAY/SG/SGY, 3027A/AY/G/GYKDC-308A/AY/G/GY, 4027/V/VY/Y, F327A/G31200mV1200mVCD : 3600mVCH : 3600mVAM(E) : 855mVFM(E) : 1372mVFM(J,K) : 1800mVAM(J,K) : 600mVCHANGERKEY MATRIXWITHLCD DRIVERLCDREMOCONMI-COMCDANTAM AGCFM AGCDECODERRDSRESETICEEP-ROMTUNER,MPX &E-VOL.SUPPLY ICSW5VSERVOP-ANTP-CONPOWERMUTELOGICDETACCBUDETMUTEPREPOWER ICSPACCUPBACKOUTOUTPREIC1DATA HMUTEDATA CREQ HCH-CONAUDIO OUTCLKREQ CRSTBACK UPBU5VIC2SW5VLO/SRSTLOE/LIMMOLO/EJSTOPMUTE8EJESDASCLKAUDIO OUT12EJEQ501Q502AM+BFM+BAM AGC OUTIC6CHCDSERVOBU5VA8VTUNER OUTBU5VIC11IC12IC10FM AGC OUTA8VSW2SW1ILLUMIVCCBU5VAUDIO+BAM+BFM+BBACK LIGHTKEY ILLUMIQ51,55SW5VQ50SERVOBU5VFM+BAM+BA8VP-CONP-ANTIC8Q20Q10IC7MUTEQ223,224IC4ELECTRIC UNIT (X34- )SWITCH UNIT (X16- )BLOCK DIAGRAM4KDC-2027SA/SAY/SG/SGY, 3027A/AY/G/GYKDC-308A/AY/G/GY, 4027/V/VY/Y, F327A/GCOMPONENTS DESCRIPTION SWITCH UNIT (X16-2462-7x/2472-7x)Ref No. Application/Functions Operation/Condition/CompatibilityIC1 LCD driver LCD derive & Key input interfaceIC2 Sensor Remote control sensorQ1 Key scan detect key scan start at base gose “L”.Q2 LED SW When Q2 base gose “H” LED is light on RED ColorQ3 LED SW When Q2 base gose “H” LED is light on GREEN Color CD PLAYER UNIT (X32-5490-00)Ref No. Application/Functions Operation/Condition/CompatibilityIC1 Mechanism control When BU5V & MSTOP (12pin) goes “H” (IC1 is active)IC2 SW3.3V AVR When CNTL (1pin) goes “H” (SW3.3V AVR : ON)IC3 CD DSP & servo IC CD RF amp, Servo, DSP & DACIC4 BTL driver Focus, tracking coil, Sled & Spindle motor driver ICQ2 SW SW5V SW transistorQ3 APC Auto Power ControlQ4 SW EQ SW transistor ELECTRIC UNIT (X34-3102-7x)Ref No. Application/Functions Operation/Condition/CompatibilityIC1 System control IC System control microprocessorIC4 Audio power IC Audio power amplifierIC6 RDS decoder RDS decoder ICIC7 Power supply IC Multi AVR IC (for 5V, 8V, P-CON & P-ANT)IC8 Muting logic IC Control for MUTE, P-ANT & RESET mutingIC10 E-VOL & tuner IC E-VOL. FM/AM tuner & stereo decoderIC11 Reset IC When BU5V line voltage is less than 3.5V, this IC output line is “L”IC12 E2PROM Memorized tuner adjustment data (save & load)Q10 BU detector When the base goes “H” during BU applied (ON)Q20 ACC detector When the base goes “H” during ACC applied (ON)Q40 Muting driver foe Q223, 224 When the base goes “L” (Muting : ON)Q50 SW5V When the base goes “L” (SW5V : ON)Q51 SW Control SW for IC7Q55 SERVO +B AVR Servo AVR (7.4V)Q70 Serge detector When the base goes “H” (Serge detection)Q101 DSI illumination SW When the base goes “L” (DSI illumination : ON)Q102 Panel 5V SW When the base goes “L” (Panel 5V : ON)Q201 Noise buffer Tuner audio noise buffer amplifierQ223,224 Preout muting SW When the base goes “H” (Preout muting : ON)Q251 SW When the base goes “L” (IC4 : ON)Q252 Smeter RC & MPTHTC SW RC & TC is “LONG” when the base is “H” (base is “L” is AF search)Q253 Smeter RC & MPTHTC SW When collector is “H”, emitter is “H”Q501 AM RF amplifier When the base goes “H” (RF circuit gain is up)Q502 FM RF amplifier When the base goes “H” (RF circuit gain is up)Q503 MPX buffer MPX input buffer with RDSKDC-2027SA/SAY/SG/SGY, 3027A/AY/G/GYKDC-308A/AY/G/GY, 4027/V/VY/Y, F327A/G5MICROCOMPUTERS TERMINAL DESCRIPTION SYSTEM MICROCOMPUTER : UPD780058GC55x (X34 : IC1)Pin No. Name I/O Description Processing Operation1PANEL I Panel detection H : Panel detached, L : Panel attached2 8EJE SW IH : Eject is completedExcept 8cm CD model : Always output L3NCONot used (out put L)4AvssH : Panel detached, L : RESET5 L-RST O LCD driver RESET Normal H, Power off LWhen 7seg model, output L6 L-CE O LCD driver selectionH : Select (panel communication)When panel attached, output L7AVREF18NC Not used (connected to 9pin)9 IC10-DATA I/O IC10, E2PROM data communication Non communication : H10 IC10-CLK O IC10, E2PROM clock communication Non communication : HNon communication : H11 L-DATAL I Data input from the LCD driver When panel detached : LPull down on X34 unit, Pull up on X16 unit12 L-DATAS O Data output to the LCD driver When panel detached, output L13 L-CLK O Clock output to the LCD driver When panel detached, output L14 R-DATA I Data input from the RDS Except RDS model : Output L15 R-QUAL I Quality input from the RDS Except RDS model : Output L16 CH-DATAC I Data input from the changer (new 5L) Except changer model : Output L17 CH-DATAH O Data output to the changer (new 5L)When non communication, last data keepingExcept changer model : Output L18 CH-CLK I/O Clock input/output with the Changer (new 5L)Check the old and newExcept changer model : Output L19 CH-REQH O Request output to the changer (new 5L)L : RequsetExcept changer model : Output L20 NC O Not used (output L)21 AFS O Noise detection time constant switching terminalH : Normal, L : FM/AM seek and AF search(When tuner SRC auto zero, L)2224 NC O Not used (output L)25 CH-CONT O Changer controlH : Changer on, L : Changer offExcept changer model : Output L26 TYPE REF O 5V lines output for destination setting H : During destination reading27 SD I Tuner SD input H : Station detected28 NC O Not used (output L)29 TYPE2 I Destination type selection terminal 2 Refer to destination type list.30 TYPE1 I Destination type selection terminal 1 Refer to destination type list.6KDC-2027SA/SAY/SG/SGY, 3027A/AY/G/GYKDC-308A/AY/G/GY, 4027/V/VY/Y, F327A/GPin No. Name I/O Description Processing Operation31 TYPE0 I Destination type selection terminal 0 Refer to destination type list.32 TUNER-TYPE1 I Destination available/genuine model rool off H : Genuine model 1, L : Available model33 Vss134 TUNER-TYPE0 I Destination available/genuine model noise cancel H : Genuine model 0, L : Available model35 MUTE O Mute (E.Vol, Preset) controlH : Mute on, L : Mute offPower off after that 15 second L36 M-DATA I/O Data input/output with the CD mechanism Non communication : H37 M-CLK O Clock output to the CD mechanism Non communication : HWhen adjustment = H38 ADJ O Tuner lines adjustment PS1-0, 1=L PS1-2, 2-0, 1=Hi-zIC10-DATA, CLK=Hi-z39 P-MUTE O Power IC mute controlH : Mute off, L : Mute onPower off after that 15 second H40 SVR O Power IC servo controlH : When momentary power down detectedL : Nomal41 P-STBY O Power IC standby control H : Power IC ON, L : Power IC OFF42 SW5V O SW 5V controlH : SW5V OFF, L : SW5V ONPower off after that 10 second H43 B.U-DET I Back up detection terminal H : Power down, L : B.U. on44 ACC-DET I ACC detection terminal H : ACC OFF, L : ACC ONPower supply IC SW1 control 045 PS1-0 OAudio 8V, P-CONPower supply IC SW1 control 146 PS1-1 OAudio 8V, P-CON47 PS1-2 O Power supply IC SW1 control 2 P-ANTPower supply IC SW2 control 048 PS2-0 OILLUMI, FM, AMPower supply IC SW2 control 149 PS2-1 OILLUMI, FM, AM50 BEEP BEEPH : Light on, L : Light off51 DSI O DSI controlWhen panel attached, output LWhen panel detached, flashing at the panel (H/L)FIX model is output L52 NC O Not used (out put L)53 NC O Not used (out put L)MICROCOMPUTERS TERMINAL DESCRIPTIONBA4911 SW1 Power supply IC outputPS1-2 PS1-1 PS1-0 A8V P-CON P-ANTLLLSTANDBYLL (H) H (L) ON OFF OFFLHHONONOFFHHHONONONBA4911 SW2 Power supply IC outputPS2-1 PS2-0 ILLUMI FM AMLL STANDBYL (H) H (L) ON ON OFFHHONOFF ONKDC-2027SA/SAY/SG/SGY, 3027A/AY/G/GYKDC-308A/AY/G/GY, 4027/V/VY/Y, F327A/G7Pin No. Name I/O Description Processing Operation54 LOE/LIM SW I CD mechanism down&limit detection H : Chucking detection, L : Normal55 MO SW O CD mechanism loading motor control output H : Loading, Eject, Break, L : Play56 LO/EJ I/O CD mechanism loading/Eject switching terminal H : Eject, L : Loading57 M-STOP O Stop output to the CD mechanism H : Play, L : Stop58 M-RST O Reset output to the CD mechanism H : Normal, L : CD mechanism reset59 M-MUTE I Mute input from the CD mechanism H : Mute off, L : Mute on60 RESET Reset input from the System microcomputer61 REMO I Remote control input62 R-CLK I RDS clock input Except RDS model : Output LH : Changer detection63 CH-REQC I Request input from the changer (new 5L) L : RequestExcept Changer model : Output L64 LOS SW I CD mechanism loading's switch detectedH : No discL : Disk in (Loading Start)65 KEY-REQ IKey input detected H : Key no input(11pin L connected to the DATA L) L : Key input (edge key data reading start)66 12EJE SW I 12cm disc detected L : 12cm disc67 Vss068 VDD169 X2 MAIN Xtal oscillating circuit 4.19MHz Xtal connection70 X1 MAIN Xtal oscillating circuit 4.19MHz Xtal connection71 IC TEST72 XT2 Not used OPEN73 XT174 VDD0 VDD Connected to VDD75 AVREF0A/D converter reference voltage control output,connection to the 80pin AVCONT76 S-METER I S-meter input77 NOISE I FM noise detection input2.5V or greater : NAVI MUTE78 PHONE I 2 way mute 1.0V or less : TEL MUTEExcept phone mute model : Output L79 NC O Not used (out put L)80 AVCONT O A/D converter standard voltage control outputH : During A/D converter activesame timing with PONMICROCOMPUTERS TERMINAL DESCRIPTION8KDC-2027SA/SAY/SG/SGY, 3027A/AY/G/GYKDC-308A/AY/G/GY, 4027/V/VY/Y, F327A/G CD MECHANISM CONTROL IC : 789166YGB-A513 (X32 : IC1)Pin No. Name I/O Description Processing Operation16 NC I NC GND7 ZMUTE_L I 0 bit MUTE detect (Lch)Less than 54h : NORMAL,More than 54h : ZMUTE detect8 ZMUTE_R I 0 bit MUTE detect (Rch)Less than 54h : NORMAL,More than 54h : ZMUTE detect9AVss - DGND10 /MUTE_L O Lch Audio mute control L : MUTE ON, H : MUTE OFF11 /MUTE_R O Rch Audio mute control L : MUTE ON, H : MUTE OFF12 /MSTOP I Interruption for stand-by L : STOP, H : Release for STOP mode13 INTQ I Interruption for DSP IC H : Interruption14 /FOGUP I Interruption for focus gain up L : Fo GAIN UP, H : NORMAL15 PON O Power ON/OFF control H : ON, L : OFF16 /SCK O (for DSP) serial data clock output17 Vdd1 - BU5V18 SO O (for DSP) serial data output19 SI I (for DSP) serial data input20 /CLK I/O (for system control) I2C clock21 DATA I/O (for system control) I2C data22 Vpp - (FLASH saving terminal)23 XT2 - NC OPEN24 XT1 I NC GND25 /MRESET I Reset detect L : RESET, H : NORMAL26 X2 - System clock 4.19MHz27 X1 I System clock 4.19MHz28 Vss0 - DGND29 Vdd0 - BU5V30 LOE&LIM_SW I Loading end & limit SW detect L : Inside detect, H : Outside31 DRV_MUTE O Driver muting L : MUTE ON, H : MUTE OFF32,33 NC O NC OPEN34 /SERCH O Condition of serch state L : Search, H : NORMAL35 /STB O Data strobe signal output36 A0 O Command & parameter signal output37 Vss1 - DGND38 /DSP_RESET O DSP reset control L : RESET, H : NORMAL3941 NC O NC OPEN42 /PON O Power ON/OFF control L : ON, H : OFF43 Avdd - BU5V44 Avref - BU5VMICROCOMPUTERS TERMINAL DESCRIPTIONKDC-2027SA/SAY/SG/SGY, 3027A/AY/G/GYKDC-308A/AY/G/GY, 4027/V/VY/Y, F327A/G9TEST MODE1. How to enter test modeWhile holding the FM key and preset 6 key and reset the unit.All display segments light up when the test mode is entered.2. How to exit from test modeReset the unit.Tur ning ACC off, power off, momentary power down or paneldetaching does not terminate the test mode.3. Test mode specifications of CD receiver Pressing the Track Up key skip to tracks in the following se-quence:No.9 No.15 No.10 No.11 No.12 No.13 No.14 No.9 (repeats the cycle) Pressing the Track Down key skip to the track immediatelybefore the track being played. Pressing Preset 1 key skip to track No. 28.Forced ejection is not provided.4. Audio functions Pressing the AUDIO key or the “*” key on the remote con-troller initiates the Audio adjustment mode. In the Audio adjustment mode, the Seek Up/Down keys onthe remote controller can only be pressed shortly. (They can-not be held depressed.) The volume is -10dB (which is displayed as “30”). LOUDNESS is OFF. The Bass/Treble Up/Down and Balance/Fader Up/Downbuttons function as full-boost/full-cut and full-front/full-rearrespectively.5. Menu mode (for 14segment model) Pressing the CLK or the DNPP key on the remote controllerinitiates the Menu mode. In the Menu mode, the Seek Up/Down keys on the remotecontroller can only be pressed shortly. (They cannot be helddepressed.) With the models incorporating RDS, the first operation in themenu becomes local seek.6. Version and operating hours display The following table shows the key operations and resultingdisplay information.Key Operation DisplayPressing Preset 1 Version (Date and time display)Pressing Preset 2 All display segments light upPressing Preset 3 CD operating hoursPressing Preset 4 E2PROM (Adjustment data for IC10)Pressing Preset 5 CD ejection countPressing Preset 6 Number of times adjustment for IC10 Holding Preset 3 while the operating hour information is dis-played clears it. Holding Preset 5 while the ejection count information is dis-played clears it.Adjustment Mode Adjustable items1 : Stereo Decoder Sub address : 92 : Configuration Sub address : D3 : Stereo decoder Adjustment Sub address : E4 : Hi-Cut Sub address : C5 : Field strength control Sub address : B Default valuesIf they are not written in the EEPROM, the default valuesspecified are set in IC10.Adjustment procedure1. Enter the IC10 Adjustment mode by resetting the unit whileholding preset 3 key + preset 6 key.2. Select the TUNER sour