Kenwood-RSG7G-rec-sm 维修电路原理图.pdf

STEREO INTEGRATED AMPLIFIER/TUNERR-SG7/SG7GSERVICE MANUAL 1999-7/B51-5549-00 (K/K) 229970%604603614611642640612641613?stereo integrated amplifier/tunerphonesdownupvolumecontrolpureinput selectorN.B./tonepureenter%bandauto/monofi?turningon/standbySPEAKER(6 16 )RLSUBWOOFERPRE OUTFM75FM300GNDAMANTENASYSTEMCONTROLRLININCDAUXREC OUTPLAY OUTREC OUTPLAY OUTTAPEMDSUB panel *(A22-)Front glass(B10-2373-03)Indicator(B12-0368-04)Panel *(A60-)AC cord *(E30-)Lock terminal board(E70-0034-05)Phono jack(E63-1014-05)Phono jack(E63-0136-15)Phono jack(E63-0047-15)Metallic cabinet(A01-3470-11)Lock terminal board(E20-0476-05)Rectangular receptacle(E08-0312-05)AC cord bushing(J42-0083-05)Knob(K29-6741-04)Indicator(B12-0320-04)Knob(K29-6358-14)Escutcheon(B07-2457-03)Knob(K29-7570-03)* Refer to parts list on page 23.R-SG7(K) COVER1,1P( 99.10.30 0:17 PM yW 2RadioFans.CN 收音机爱 好者资料库R-SG7/SG7G2CONTENTS / ACCESSORIESCONTENTS / ACCESSORIES . 2CIRCUIT DESCRIPTION.3ADJUSTMENT.7PC BOARD . 8SCHEMATIC DIAGRAM . 11EXPLODED VIEW .22PARTS LIST.23SPECIFICATIONS .Back coverContentsFM indoor antenna (1)(T90-0801-15) : M(T90-0809-05) : ETDISPLAYSLEEPTAPEREMOTE CONTROL UNITRC-SE9123RANDOM456CLEAR789P.MODEO.T.E.0+10EDITTUNERBANDINPUTN.B.MUTEVOLUMECONTROLMDCDP.CALLBatteries (R6/AA) (2)AM loop antenna stand (1)(J19-3645-05)AM loop antenna (1)(T90-0833-05)Audio cords (2)(E30-0615-05)System control cord (1)(E30-2628-05)AC plug adaptor (1)(E03-0115-05)Battery cover (A09-0356-08)Remote control unit (1)(A70-1154-05) : M . . . . . . . RC-SE9(A70-1155-05) : TE . . . . . . . RC-SE9(E)AccessoriesOperation to resetThe microcomputer may fall into malfunction (impos-sibility to operate, erroneous display, etc.) when thepower cord is unplugged while power is ON or due toan external factor. In this case, execute the followingprocedure to reset the microcomputer and return itto normal condition.R-SG7Pull the power plug from the receptacle, and then plugit in again while keeping the “on/standby” key pressed.?Please note that resetting the microcomputer clears thecontents stored in it returns it to condition when it left thefactory.R-SG7(K) COVER1,1P( 99.10.30 0:17 PM yW 3RadioFans.CN 收音机爱 好者资料库R-SG7/SG7G3CIRCUIT DESCRIPTION1. INITIAL STATE(1) AMP related block POWER .OFF SELECTOR SOURCE .TUNER DISPLAY.SELECTOR N.B.CIRCUIT .OFF A CLASS VOLUME VALUE .1.80 STEP AB CLASS VOLUME VALUE.9 STEP PURE A MODE.NORMAL(AB CLASS) AUTO POWER SAVE.OFF(2) TUNER related block BAND.FM P.CH MEMORY.LAST FREQUENCY LAST P.CH .01ch RDS DATA TABLE MEMORY.NO DATA RECEIVING FREQUENCY.LOWER LIMIT VALUE OFRECEIVING FREQUNCYFM : 87.5MHzAM : 531kHz AUTO/MANUAL.AUTO EON THRUST RECEIVING MODE.OFF(3) TIMER related block CLOCK .STOP(AM12:00) PROGR.WORKIG MODE (OFF)CONTENTS OF PROGRAM.ON=AM12:00OFF=AM12:00PLAY MODE=PLAYSELECTOR=TUNER(1ch)REC MODE=TAPE O.T.T.WORKING MODE (OFF)O.T.T.ON TIME.AM7:002. INITIALIZING2-1 The method of the initializingThe system is initialized when the power is turned on whilepressing the ON/STANDBY key.(1) Contents of the operation All the functions are initialized.3. BACK UPThis function holds the current state of the unit even if theAC power of the receiver is turned OFF.(1) Operation outlineThe backup state set command(CE) of a microcomputeris set low when the AC power is turned OFF. The micro-computer detects the signal and enters the stop state.The microcomputer is reset when the AC power is turnedON. The data for backup state comfirmation is checkedby reset processing. The microcomputer is initializedwhen the data was destroyed. If it is not destroyed, themicrocomputer is started in the backup state. The data for backup state comfirmation is written in aRAM area. The microcomputer is set to the stop mode so as to savethe power consumption. A backup state set command signal is detected by a timerinterrupt of 1 msec. The backup guarantee period is set in a circuit.(2) Contents of backup data to be held AMP POWER ON/OFF DISPLAY MODE SELECTOR SOURCE N.B.CIRCUIT MODE A CLASS VOLUME VALUE AB CLASS VOLUME VALUE PURE A MODE AUTO POWER SAVE ON/OFF TUNER LAST BAND PRESET CHANNEL/RECEIVING FREQUNCY/PI/TA/PTY/PS LAST RECEIVING FREQUNCY AND PRESETCHANNEL(AM/FM) PRESET MEMORY DATA(1ch40ch) AUTO/MANUAL EON THRUST RECEIVING FREQUNCY CLOCK/TIMER LAST CLOCK DATA PROGRAMMED CONTENTS/PROGRAM TIMER WORKING MODE ON/OFF O.T.T. SETTING TIME/WORKING MODE ON/OFF4. CONDITIONS ACCORDING TO THE DESTINATION4-1 Destination list of tunerDesti-nationBandReceivingfrequencyrangeChannelspaceIFPLLreferencefrequencyDIODE SWDSW1 DSW2(D519) (D518)FM87.5MHz50kHz+10.7MHz25kHzE1108.0MHz0 1AM531kHz9kHz+450kHz9kHz1602kHzFM87.5MHz50kHz+10.7MHz25kHzE3108.0MHz1 0(RDS)AM531kHz9kHz+450kHz9kHz1602kHzME1 changes by only setting DSW1. (DSW10,E1) X 1*DIODE SW(DSW) : 0 Without diode(when static, input low)1With diode(when static, input high)XSwitching transistor R-SG7(K) COVER1,1P( 99.10.30 0:17 PM yW 6R-SG7/SG7G4CIRCUIT DESCRIPTION5. TEST MODE5-1 AMP test mode using main units keys Entering the AMP test modeTurn on the power while pressing theBAND key. Canceling the AMP test modeBy turning off the power, the systen is initialized and thetest mode is canceled.5-1-1 Contents of AMP test mode(1) Automatic on/standby ON The POWER ON state is entered when the power isturned on whille pressing the BANDkey. All functions arethen initialized and activated in the all-lighting mode. Sub-clock oscillation diagnosis functionThe oscillation diagnosis (existence of oscillation andmeasurement of period) of a sub-clock is performedbefore the test mode is entered. If the diagnosis result isOK,the system enters the test mode. If the diagnosisresult is NG,the oscillation of the sub-clock is diagnosedagain. If the result is OK, the system enters the testmode. If the diagnosis result is continuously NG fivetimes, the system stops with ERR1 and ERR2 displayed.(2) All- lighting mode All the fluorescent display indicators and LED lamps lightwhen the power is turned on while pressing the BANDkey. After that, all- lighting mode is canceled when anymain units key is pressed. The normal display is obtainedwhen the selector is set to TUNER then appears.(3) Others The AMP test mode is not terminated even if the selectoris set to positions other than TUNER. In the AMP tesst mode,the muting during mode selectionis not controlled. However, the operation during thepower-on sequence is the same as the normal operation. The SP protection operation is also the same as the nor-mal operation. In the AMP test mode using main units keys,the keysbelow provide a special operation according to the posi-tion where the selector is set. The main unit keys exceptdescribed below and the rotary encoder provide the nor-mal operation.(4) When selector is set toTUNER1 Write data in the unused area of E2PROM, then read thewritten data. If the read data is the same as the writtendata, RAM OK is displayed in the fluorescent display indi-cator. If the former is the different from the later, RAM NGis displayed. 2 Set the TUNER ATT to OFF and display the S level inhexadecimal when the ENTER key is pressed . (ATTOFF 8 8 is displayed in the fluorescent display indicator.)3 Set the TUNER ATT to ON and the display S level inhexadecimal when the ENTER key is pressed. (ATT ON8 8 is displayed in the fluorescent display indicator.)* The special display using the ENTER key is continueduntil the next operation is carried out. ( 8 8 : S LEVEL)When keys other then ENTER are pressed in items 1 to3 above, the TUNER ATT is set to OFF and the normaldisplay appears. The operation corresponding to the keythat has been pressed performed in this case.(5) When selector is set to positions other than TUNER.1 ENTER and PURE A keys.The master volume level is selected cyclically, while press-ing the ENTER key.2 AUTO/MONO key.Selects the mute operation and equalizer cyclically in theorder below for operation display every time this key ispressed.*In the operation for except the AUTO key, become pre-condition equalizer.*Pre -condition : The equalizer becomes the condition to bepushed the AUTO key before (include N.B. circuit).3 ? BAND and tuning UP/DOWN keys.KeysOperationPURE AIncrease the P.CALL every time this keyis pressed.N.B./TONEDecrease the P.CALL every time this keyis pressed.ENTERSelects the display cyclically in the orderbelow every time this key is pressed.Value of MasterPress the Press the PURE A key, volume.ENTER key. then press the ENTER key.MAX8616.00MID408.00MIN10.20KEYOPERATIONAUTO/MONOKEYSOPERATIONBANDEvery time this key is pressed, all the displays go off and the normal display is selected cyclically. TUNINGUP/DOWNR-SG7(K) COVER1,1P( 99.10.30 0:17 PM yW 7R-SG7/SG7G5CIRCUIT DESCRIPTION6. Microprocessor : uPD78045FGF071(X09-IC11)6-1 Microprocessor periphery block diagramX09,ED1FL DISPLAY(FIP9GM6R)RESETCEREMOCONKEY MATRIXLEVEL INCLASS A LED FL GRID43916BIAS MIDIC113X05,IC2BIAS HIPLL ICLOW RELAY(LC72131)HI RELAY1SPEAKER RELAYuPD78045FGF071X09,IC1(u-COM)3SELECTOR ANALOGX09,J4SW CONTROL ICSERIAL DATA(NJU7313AM)BUSYX09,IC3X09,S5162E.VOL.ICVOLUME(M62421SP)ROTARY ENCODER2ENC-ASDENC-BSTEREOHEADPHONESPROTECTIONA MUTET MUTEH.P. MUTEATTA CLASS ONKey matrixbsignifies pin number of microprocessor.KR0KR1KR2KS0DSW1(D519)DSW2(D518)KS1POWERAUTO/MONOBANDKS2N.B. CIRCUITINPUT SEL.TUNING UPKS3pure AENTERTUNING DOWN59606463626158R-SG7(K) COVER1,1P( 99.10.30 0:17 PM yW 10Pin No.Pin NameI/ODescriptionActive177G1GOFL grid71.8VDD-Microprocessor power supply (+5V).9E2PROM SCLIE2PROM control clock.10E2PROM SDAI/OE2PROM control data.11,12NC-Unused.13A CLASS ONOPOWER ON/OFF control signal.H : ONL : OFF14SEL STBOStrobe signal of selector IC.15SEL/PLL/CLKOControl clock of SEL/PLL IC.16SEL/PLL/DATAOControl data of SEL/PLL IC.17RESETIReset signal of microprocessor.L : Reset18CEIDetection signal input for AC OFF.19PLL DOIPLL IF count data.20AVss-A/D power supply(GND).21PLL CEOChip enable control of PLL IC. L : ON22T MUTEOOutput terminal of muting signal for TUNER.L : ON23STEREOIStereo signal input for TUNER.L : Stereo ON24SDISynchronized signal detection input.25VOL SCLOControl clock of E. volume IC.26VOL DATAOControl data of E. volume IC.L : CE27LEVEL INIVolume level input.H : ONL : OFF28S LEVELISignal level input.(E/T type only)29A Vdd-A/D power supply(+5V).30A VREF-A/D reference voltage(+5V).31CLOCK-32.768kHz oscillator.32CLOCK-32.768kHz oscillator.33Vss-Microprocessor power supply(GND).34MAIN COLCK-4.19MHz oscillator.35MAIN COLCK-4.19MHz oscillator.36S DATAI/O16 bit system data.37S BUSYI/O16 bit system busy.H : BUSYL : READY38H.P. MUTEOMuting signal input of headphones.L : ON39ATTOAttenuator control.L : ON40A MUTEOAudio muting signal control.L : ON41LOW RELAYOAmplifier low relay control.H : ONL : OFF42HI RELAYOAmplifier high relay control.H : ONL : OFF43SP RELAYOSpeaker relay control.44,45NCIUnused.46PROTECTIONIDetection signal input of protection.H : ONL : OFF47REMOCONIRemote control input.48IC(VPP)GND-Connected to VSS.49CLASS A LEDOControl signal output of class A LED. L : ON50BIAS A MIDOBias control signal(MID) output.51BIAS B HIOBias control signal(HI) of class A LED.52Vdd-Microprocessor power supply(+5V).53ENC AIVolume encoder (A) input.54ENC BIVolume encoder (B) input.55HEAD PHONESIDetection signal input of headphones.H : ONL : OFF56,57-OUnused.5860KR2KR0IKey return input(KR2KR0).H : Key ON6164P1613/KS30OFL segment(613)/key scan(KS3KS0).H : ON6570P12P7OFL segment(127) control.H : ON71VLOAD-FL driver power supply(-30V).7277P6P1OFL segment(61) control.H : ON78NC-Unused.79,809G,8GOFL grid(9G,8G) control.6-2 Pin descriptionR-SG7/SG7G6CIRCUIT DESCRIPTIONR-SG7(K) COVER1,1P( 99.10.30 0:17 PM yW 11R-SG7/SG7G7ADJUSTMENTNO.ITEMINPUT SETTINGSOUTPUT SETTINGSTUNER SETTINGSALIGNMENT POINTSALIGN FORFIG.1DISCRIMINATOR(A)98.0kHz1kHz, 75kHz dev.60dB(ANT input)Connect a DC voltmeter between Pin 1 and Pin 2 of CN 2.MONO 98.0MHzL 310V(a)L 32Minimum distortion.2DISTORTION (STEREO)(C)98.0MHz1kHz, 68.25kHz dev. Pilot: 6.75kHz dev. 60dB(ANT input)(B)AUTO 98.0MHzIFT (A1)Minimum distortion.(a)NO.ITEMINPUT SETTINGSOUTPUT SETTINGSAMP SETTINGSALIGNMENT POINTSALIGN FORFIG.POWER: ON SELECTOR : AUX1B CLASS IDLE CURRENTConnect a DCvoltmeter across CN1(L)CN2(R)(X09, A/7)PURE A : OFF Volume : 0VR1(L)VR2(R) (X09, A/7)20mV(b)SPEAKER(6 16 )RLSUBWOOFERPRE OUTFM75FM300GNDAMANTENASYSTEMCONTROLRLININCDAUXREC OUTPLAY OUTREC OUTPLAY OUTTAPEMDOscilloscopeDistortion meterAC voltmeterDummy antenna(A)(B)(C)(D)AGAGFM SGMPXAGFM SGAM SG(a)(b)CN1(L)CN2(R)Dc voltmeter20mVFM SECTION SELECTION :FMX05-4882-70 (E/T TYPE)AUDIO SECTION (X09-496x-xx)SYSTEM CONNECTIONSNo.ITEMINPUT SETTINGOUTPUTSETTINGTUNERSETTINGALIGNMENTPOINTSALIGN FORFIG.1TUNED LEVEL(A)98.0MHz MONO1 kHz, 75 kHz dev.30dBu 10 dB (ANT input)(B)MONO98.0MHzVR1Adjust VR1 andstop at the pointwhere EDI(TUNED) goes ON.(a)X05-488X(E/T)/486X(M)R-SG7(K) COVER1,1P( 99.10.30 0:17 PM yW 148ABDCE2135746Refer to the schematic diagram for the value of resistors and capacitors.PC BOARD (Component side view)TUNER UNIT (X05-4860-71) : MTUNER UNIT (X05-4882-70) : ETR-SG7(K) COVER1,1P( 99.10.30 0:17 PM yW 15FHJLNGIKMO2135746R188C53C48C50C52C51C54C119C115C118C47C11C9C12C17C16C15C8C3C2C1C4C7C6C5C43C44C18R125R118R124R187R171R52R53C145C146W221R26R25W209C46R17R20R18R28R19R13R12W215R5R16R14R7C120R127R8R6R3R1R4R11C116C117W216R27C55C56C140R99R67R79R77R81R173R100R68W212R80R78C49R29R174R157R176R2W205R159R103R163R116R117R115W207R161R166W208R167R112R114W204R10R111R102R193W203W219W220R9R22R30R24R170R158W218R21R23R15R162R191C10EB1815424254041646580EBEBEBEBEBEBEBEBEBEB1151630C707C708R592C706R704C705W501R584R591C704R593C701R582C507R537R536C515C533C531C526C535C505R581R552R551C532R580C534W508R509C529C521C514C513C520W502R514R510C522R513R515R587R549R548C528R586W511W509R533R534R535R517R511R518R585R589C516C503C504R531R532C525W512R538BER583W503W504W510C524R564C518R529W506W505R569R556R555C508R553R561R554R557R530R541R543R540R542R47C61C41R138R139R35C124C26W901R34C30C28C125C23C24R133C25C27C29W211R149R37 R39BER97C127ER43ER36R38BR140C37BR44R186C38EB R50R185C62R48C42R98R177R45R46C63C32BEEBW206R41R49C64C31D33Q70Q69Q63Q56Q57IC1Q13Q14Q15 Q16Q68D6D7D31Q53D523D514D513D505D504IC13D502IC11Q504D507D511D506D508D510D509Q1Q2Q3Q4Q60Q61TAPE RECTAPE PLAYMDRECMDPLAYSW/CDAU/R122R119C113R121C114C103C109C112C110C111R71R70R72R69C19C20C138C129C13C14R74R75R76R73R88R87R83R107R168R169R165R128R129VR1VR2K1K2K3GNDSDATABUSYSGNDSGNDBUSYW26W33W27W19W14W46W70W5W6W106W71W116W119W115W39W54W117W120W105W122W103W95W90W63W51W56W94W129W73W55W82W89W35W37W66W65W60W38W80W79W113W100W64W111W126W83W81W72W57W22W102W84W107W18W1W25W30W17W32W8W13W16W15W9W10W31W28W98W12W44W11W48W4W7W108W76W34W92W67W91W58W86W24W52W20W77W68W62W61W123W128W69W131W118W130W45W96W1015.6V AVR-30V AVR12V AVRREC BUFFSELECTORB CLASSIDLE LIDLERF11A125VRchLchC136C106C141C105R110R84W59R123R82R126R61R86R175R130R85C121R63R160R64PH3C45PH4PH2R62PH1W43C108C107R156C104C139R172R164C102W50C101R108R141W2R92R91R90R89R192W3R150R189C143W301W302C144R142R101R106W23W305R190W303W304R104W41W308R155R11319115EBEBBE181131151458110111EBEBEB12EB121811311512X701P198R