夏普GF-4949ZS收录机维修手册.pdf

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1、SHARP SERVICE MANUALS03C4G F4949ZGPHOTO: G F-4949ZGGENERALPower source :Speakers:Output power:Semiconductors:Dimensions: Width;Height;Depth;Weight:GF-4949ZGGF-4949ZSIn the interests of user-safety the set should berestored to its original condition and only partsidentical to those specified be used.

2、For the mechanical adjustment, refer to the620X Service Manual (ATSM281022TRC) alreadyissued.SPECIFICATIONS(AC operation)RMS; 6W (3W + 3W) (DC opera-AC 1 IOV-127V and 22OV-24OV,tion, 10% distortion)5 ICS4 Transistors50/60Hz11 Diodes2 LEDs445mm (17-l/2”)233.5mm (9-3/l 6”)DC 9V (UM/SUM-1 or R20 type x

3、 6)98mm (3-7/8”)3.1 kg (6.8 tbs.) without batteries12cm (4-3/4”) woofer x 2Ceramic type tweeter x 2PMPO; 16W (BW + 8W)(AC operation)MPO; 12W (6W + 6W)TAPE RECORDERTape :Compact cassette tapeFrequency response:50Hz - 10,OOOHzSignal/noise ratio:45dBInput sensitivity and impedance:External mic.;600 ohm

4、sLoaded impedance:Headphones;8 ohms - 25 ohmsRADIOFrequency range:FM; 87.6 MHz - 108 M H zAM; 526.5 - 1605.5 kHzSW1 ; 2.3 MHz - 7.3 MHzSW2 ; 7.3 MHz - 22.0 MHzSpecifications for this model are subject to change withoutprior notice.FOR A COMPLETE DESCRIPTION OF THE OPERATION OF THIS UNIT,PLEASE REFER

5、 TO THE OPERATION MANUAL.NAMES OF PARTS1. Built-in Microphone (L-ch)2. Power Indicator3. FM Stereo indicator4.Band Selector5.Function Selector6. Volume Control7. Tone Control8.Fine Tuning9. Tuning Control10. FM/SW Telescopic Rod Antenna11. Built-in Microphone (R-ch)12.Headphones Jack13. AC Power Sup

6、ply Socket 1 1.14. Cassette Holder: , i -15. Record Button16. Rewind Button - 17. Playback Button18. Fast-forward Button19. Stop Button20. Eject Button21. Beat Cancel Switch22. External Microphone Jacks23. Battery Compartment LidFigure 2-lFigure 2-2VOLTAGE SELECTIONBefore operating the unit on mains

7、, check the preset voltage.If the voltage is different from your local voltage, adjust thevoltage as follows: Slide the AC power supply socket coverby a little loosing one screw to the visible indication of the sideof your local voltage. See Figure 2-3.c7PHONES 0Figure 2-3-2-DISASSEMBLYCaution:Prior

8、 to the disassembly, be sure to remove the AC powersupply cord, cassette tape and batteries from the unit.? FRONT CABINET REMOVAL(Refer to Figures 3-1 and 3-2.)1. Remove five screws and four knobs j).2. Pull the front cabinet frontward by holding its upperpart and disconnect three tips 0.? MECHANISM

9、 BLOCK REMOVAL(Refer to Figure 3-2.)1. Remove two screws .2. Disconnect two sockets 0 .3. Unsolder two tips and then the mechanism blockcan be removed.Figure 3-l? MAIN P.W.B. REMOVAL(Refer to Figure 3-3.)1. Remove eight screws 0.2. Remove the LED P.W.B. from two stoppers .Then the main P.W.B. can be

10、 removed from the backcabinet.= POWER P.W.B. REMOVAL(Refer to Figure 3-3.)1, Remove two screws 0.2. Disconnect one socket.Figure 3-3DIAL CORD STRINGING1) Turn the drum fully clockwise and stretch its cord overthe parts in the numerical order as shown in Figure 3-4.2) Turn the tuning control shaft fu

11、lly counterclockwise, andfix it with the pointer aligned with the zero (0) point onthe frame. See Figure 3-5.Drum (I 15)iPulley(ll9)Spring(127)Figure 3-5Figure 3-40 SHSHfI ir-rFigure 4 BLOCK DIAGRAM-4-MECHANICAL ADJUSTMENTExcept for the following item, refer to the RD620X ServiceManual already issue

12、d.? RECORD/PLAYBACK HEAD AZIMUTH ADJUSTMENTAs shown in Figure 5-1, connect instruments, and adjustthe head azimuth adjusting screw so that the output signalsfrom both channels will have maximum waveform with thesame phase in right and left.SPEAKER f-1SPEAKER (+IFigure 5-lGENERAL ALIGNMENT INSTRUCTIO

13、NShould it become necessary at any time to check the alignment of this receiver, proceed as follows;1. Set the volume control (VR103) to maximum.2. Attenuate the signals from the generator enough to swingthe most sensitive range of the output meter.3. Use a non-metallic alignment tool.4. Repeat adju

14、stments to insure good results.5. Set the Function Selector Switch (SW102) to “radio”position.AM IF/RF ALIGNMENT? Set the signal generator to produce a signal of 400Hz, 30%,AM modulated.0For adjustments in steps 4 and 9, see -1.ETESTFRE- TEP BAND S T A G E QUEN- SET-D AL A;y- R E M A R K SCYTINGIF (

15、Connect instruments as shown in Figure 5-2.)RF (Connect instrumentsas shown in Figure 5-3.)4output.AM600600kHzkHzL7Track-5AMing14001400kHzkHzTC56Repeat steps 2.3.4 and 5 until no further Improvementcan be made.RF (Connect instruments as shown in Figure 5-4.)2.25LOWBandMHzend ofL9dialcover-age7.4High

16、end ofTC7MHzAdjust fordialmaximum/I“A n,.I OUtDUt.c-110SW,w6.06.0MHzMHZTC4111 Repeat steps 7.8.9 and 10 until no further improvement, .can be made.7.2Low12 SW,MHzend ofLaBanddial- cover-22.5High13 SW,ageend ofTC6Adjust forMHzdialmaximuma.5a.5output.14 SW,MHzMHzL6Track-15 SW,ing1919MHzMHzTC316Repeat

17、steps 12, 13, 14 and 15 until no further impro-vement can be made.11-5-Figure 5-2Figure 5-3Figure 5-41-1 Check the alignment of the receiver antenna coil bybringing a piece of ferrite (such as a coil slug) near the antennaloop stick, then a piece of brass. If ferrite increases output,loop requires m

18、ore inductance. If brass increases output, looprequires less inductance. Change loop inductance by sliding thebobbin toward the center of the ferrite core to increase induct-ance, or away to decrease inductance.FM IF/RF ALIGNEMNT? Set the signal generator to produce a signal of 4OOHz. 30%.FM modulat

19、ed.iTP1 I10 7MH%.TeletcoplcITPZ)Figure 6-lcTESTFRE-DIALAD-S T E P B A N D STA- QUEN- S E T - JUST-REMARKSGE CYTING M E N TIF (Connect instruments as shown in Figure 6-l .)II1 ( FM / I10.7High T,Adjust forFMHZend of T2best “ S”dialcurve.IIRF (Connect instruments as shown in Figure 6-2.)ITPllELECTRONI

20、CFM SIGNALVOLTMETERGENERATORlTP2187.1Low2FMBandMHzend of L3dialcover-age3FM109.0HighMHzend ofTC2dial4FM88 a8Track-MHzMHz L275r.*Adjust formaximumoutput.Figure 6-2io”FM STEREO(5PllTekc0pl.ZIC3SlGNAL GENERATORFREOVENCYpin ?mJoPF COUNTERIllIll_330K ohmGNO(See Figure 6-4iTP2)1IIIIIcIRepeat steps 2,3,4 a

21、nd 5 until no further improvement”can be made.ICUrYe1Figure 6-3 ”VCO FREQUENCY ALIGNEMNT? Set the Band Selector Switch (SWI) to “FM” position andFunction Switch (SW102) to “stereo” position.? Before this adjustment, connect the anode side of StereoIndicator (D103) to GND.? As shown in Figures 6-3 an

22、d 6-4, connect instruments.FREQUENCYDIALAD JUSTPOINTERMENTREMARKS98MHz (54dB)98MHzVRlAdjust forunmodulated38 f O.lSkHz.To Telescopic Rod Antenna2 = ,5 ohm ( Rl = 37.5 ohmR2 = 75 OhIniTERFigure 6-4. FM DUMMYFigure 6-5 ALIGNMENT POINTSNOTES ON SCHEMATIC DIAGRAM1, Voltage readings are measured with Dig

23、ital Multimeter underno signal condition at tape position.() : AM mode: FM mode2. Unless otherwise specified, all resistance is shown in ohms.K = 1000 ohms3, Unless otherwise specified, all capacitance is shown inmicrofarads.P = Picofarads(CH), (RH) : Temperature compensation4. -ub-: Printed resisto

24、r5. B and F in Band Selector Switch (SWI), at each mode, areshown in Table 6. And the Terminals except for the modein use are connected to the ground.M O D E 1 POSITION/byna-coPhect-F MSW,Table 6-6-FJ-/IWO ANTEtwM/1 MAIN P.W.B. 1A1(,/zj1I23I4I5I6ABCDEFGn1I2I3I4I5I6I:Figure 7 WIRING SIDE OF- 7 -._ .-

25、_.-.-.-. -_-._ ._.,._. _” . -.-.-.-._-._.i .-6I7I8I9I10I11I12-IIISWITCH P.W.B.6I7I8I9I10I11I12IG SIDE OF P. W. BOARD-8-0401 ZSCIISGRR I P P LE FlLTER0301 2SC945AKBIAS OXt(Specifications or wiring diagrams of this model are subject to change for improvement without prior notice.)? NOT ES ON SC+EMATIC

26、 DIAGRAM can be found on Page 6.1I2I3,I4I5Notes: PartsmaintI6IF i g u r e 9 SCHEMATII-9-I7I8I9I10I11I12rL5%!-Q201.020:22SC1alsGRRIPPLE FILTERNotes: Parts marked with ”1 ” () are important for maintaining the safety of the set. Be sure to replace these parts with specified ones for._maintaining the s

27、afety and pertormance ot the set.I 7I8I9I10I11I121SCHEMATICDIAGRAM1I2I3I4I5I6SP203R-ch(SP204L-ch)MAIN P.W.B?The parts without number are not supplied for servicing.II11JI4I9I0Figure 11 CABINET EXPLODED VIEW-ll-A8CDEFGH1I2I3I4I5I6.,TOP VIEW0 The parts without number are not supplied for servicing.BOT

28、TOM VIEW1I2I3I4I5I6Figure 12 MECHANISM EXPLODED VIEW-12-REF. NO.PART NO.DESCRIPTIONINTEGRATED CIRCUITSCODEIClIC2IC3IClOlI c201VHITA7335P/-1FM Front End lTA7335P)AGVHIAN7223/1-1FM IF/AM (Mixer,A KOscillator, IF) (AN72231VHITA7343P/-1FM Multiplex fTA7343P)AGVHIM51644L/-1Pre/Record Amp.AGlM51544L)VHILA

29、4192/-1Power Amp. (LA4192)AKTRANSISTORSa201VS2SC945AP/-1Muting (2SC945 API0202VS2SC945AP/-1Muting (2SC945 AP)Q301VS2SC945AK/-1Bias Oscillator (2SC945 AK)0401tABVS2SC1815GR-1Ripple Filter (2SC1815 GR)DlD304.5Dl01,102D103DIODES92L.l N4148FVStatic Protector (1 N4148)92Ll N4148FVFM Overload flN4148)92Ll

30、 N4148FVSwitching (1 N4148)92Ll N4148FVALC (lN4148)RH-PX1029AFZZLED, Stereo Indicator(GL-9PR25)92Ll N4148Stabilizer for AC Mode(14148)RH-PX1029AFZZLED, Power Indicator(GL-9PR25)tABACD201ABD302ACREPLACEMENT PARTS LISTI -“HOW TO ORDER REPLACEMENT PARTS”To have your order filled promptly and correctly,

31、 please furnish the following information.1. MODEL NUMBER2. REF. NO.3. PART NO.4. DESCRIPTIONNOTES:Parts marked wrth “ A” are important for maintaming the safev of the set. Be sure to replace these parts withspecified ones for matntarntng the safety and performance of the set.D501,502.D503.504VHDlOE

32、4N/-1Rectifier (lOE4N)COILSLlL2L3L6L7L8L9LlOL301L401L402RCI LAO455AFZZRCI LR0364AFZZRCILB0628AFZZRCI LA0556AFZZ92LCOILA-199APCILB0625AFZZRCILB0624AFZZRCILB0623AFZZVPCH561 KOOOOVP-CH470KOOOO92LCOI LC197BFM AntennaFM RFFM OscillatorSW2 AntennaSW1 /AM Bar AntennaSW2 OscillatorSW1 OscillatorAM Oscillato

33、rBias Oscillator, 560pHNoise Suppressor, 47pHNoise SuppressorTRANSFORMERSTlT2RCI LIOI 57AFZZFM IFRCILl0312AFZZFM DetectorRCILl03lOAFZZAM IF92LPT-277APowerACACA AACA DAPtACABA DIACAWREF. NO.CFlCF3VCl, 2,vc3.4,TCl, 2,TC4.71v c 5TC3TC5TC6TC8VRlVRlOlVR103PART NO.DESCRIPTIONCODEFILTERSR Fl LF0080AFZZCera

34、mic, FM IF, 10.7MHzA DRFI LA0074AFZZCeramic, AM IF, 455kHzAGCONTROLSVariable CapacitorsRVCR0083AFZZTuning with TrimmersTCI ; FM RF TrimmerANTC2; FM OscillationTrimmerTC4; SW1 Antenna TrimmerTC7; SWt OscillationTrimmerRVC-ZOO56AFZZFine TuningAERTO-HI 007AFZZSW2 Antenna TrimmerACRTO-Hl007AFZZAM Antenn

35、a TrimmerACRTO-HI 007AFZZSW2 Oscillation TrimmerACRTO-H1007AFZZAM Oscillation TrimmerACRVR-M0216AFZZ1 OK ohm (B), V.C.O. AdjustAB92LVR-l97A50K ohm (A), Tone ControlAG92LVR-197C20K ohm (Bl, VolumeA KControlELECTROLYTIC CAPACITORS(Unless otherwise specified capacitors are +-20% type.)Cl2Cl3Cl4C26c30c4

36、1C42c44c47c49,50C76c77c78C81clot, 102Cl03Cl11c113.114C115,116Cl21Cl28c133.134Cl35c211RCEZV336AFl CRC-EZV106AFl CRCEZV476AFl CRCEZV476AF 1 CRC-EZVlOGAFlCRCEZV335AFl HRC-EZVlOSAFl HRCEZV475AFl ERC-EZV227AFl CRC-EZVlOSAFl HRC-EZVlOGAFlCRCEZV107AFlARCEZV475AFl ERC-EZVlOGAFlCRCEZV334AFl HRCEZV476AFlCRCEZ

37、V226AFlCRCEZV107AFlARCEZVl05AFl HRCEZV477AFl ARCEZV476AFl ARC-EZVlOSAFl HRCEZV227AFl CRCEZV227AFl C33MFD, 16VlOMFD, 16VAB47MFD. l6V47MFD. 16V10MFD. 16V3.3MFD. 50V1 MFD, 50V4.7MFD. 25V220MFD, 16V1 MFD, 50VIOMFD, 16VlOOMFD, 1OV A B4.7MFD. 25VlOMFD, 16V0.33MFD, 50V47MFD. IOV22MFD, 16VlOOMFD, 1OV1 MFD,

38、50V470MFD. 1OVAC47MFD, 1OV1 MFD, 50V220MFD. 16V/AB220MFD. 16V-13-REF. NO.PART NO.DESCRIPTIONCODEC213,214.C215,216RCEZV107AFlAIOOMFD, 1OVA0C217.21892LCEUlOZlOOOY IOOOMFD, IOVACc219,220RCA21 001 AFZZ0.15MFD. 25VABC308RCEZV107AFl ClOOMFD, 16VABC402RCEZV337AFlC330MF D, 16VACc403RCEZV228AF 1 C2200MFD, 16

39、V, +50 -10%AEc404RCEZV227AFlC220MFD, 16VA0CAPACITORSClc2, 3c4c5VCCSPU1 HLI 8OJVCKZPUl HB472KVCCSPUl HL220KVCCCPUl HH330JC6VCCRPUI HH220Jc7VCCCPUl HH2ROCC8VCKZPUl HF223.Zc9VCTYPUl EX103MCl1VCTYPUl EX223Mc25VCTYPUI EX223MC27VCKZPUl HF223ZC28c43VCCSPUlHL221JVCQSMVlHL102JC45.46,C48iC63VCTYPUl EX223MVCCC

40、PUI H L15OJC64VCTYPUl EX333KC66VCTYPUl EX152KC69c71c73c74VCCCPUl HH2ROC92LCCD5OV360PJVCCCPUI HH4ROCVCTYPUl EX223MC79,80VCTYPUl EX223MC84C87.88VCCSPUl HL470JVCKZPUl HF223ZC89VCKZPUl HB223Mc90VCKZPUl HF103ZC105,106VCTYPUtEX103KC107.108VCTYPUl EXlO2Kc109.110VCTYPUl EX122KC117, 118VCTYPUl EX123Kc119.120

41、c121.122VCKYPUl HB681 KVCTYPUl EX562KC123, 124C125, 126VCKZPUl HE681 KVCTYPUl EX122K18PF, 5OV, *5%, CeramicA AO.O047MFD, 5OV, ?lO%,AACeramic22PF, 5OV, *IO%, CeramicA A33PF (CH), 5OV, -r5%,ABCeramic22P.F (RH), 5OV, +5%,Ceramic2PF (CH), 5OV. +0,25PF,Ceramic,O.O22MFD, 5OV, +80-20%,AACeramic0.01 MFD, 25

42、V, ?20%,Semiconductor/0.022MFD. 25V, i20%,ABSemiconductor0.022MFD. 25V. +_20%,A 0Semiconductor0.022MFD. 5OV. +80-20%. AACeramic22OPF, 5OV, +5%, CeramicA A0.001 MFD, 5OV, +5%,A5Styrol0.022MFD. 25V. ?20%,SemiconductorAB15PF (CH), 50V,f5%,A ACeramicO.O33MFD, 25V. rtl O%,AASemiconductor0.001 SMFD, 25V,

43、*IO%,A ACeramic2PF (CH), 5OV, +5%, Ceramic AA36OPF, 5OV. ?5%, CeramicAA4PF (CH), 5OV, *5%, Ceramic ABO.O22MFD, 25V, 90%.ABSemiconductor0.022MFD. 25V, +_20%,ABSemiconductor47PF, 5OV, 5%. CeramicA A0.022MFD. 50V. +80-20%, AACeramic0.022MFD. 5OV, +20%.ABCeramic0.01 MFD. 5OV. +80-20%,A ACeramic0.01 MFD,

44、 25V, +lO%SemiconductorO.OOlMFD, 25V, +-lo%,Semiconductor0.0012MFD. 25V, *IO%,SemiconductorO.OlZMFD, 25V, +lO%,Semiconductor, AA68OPF. 5OV, * 10%. Ceramic0.0056MFD. 25V, *lo%,Semiconductor68OPF, 5OV, +-lo%, CeramicO.O012MFD, 25V, +lO%,SemiconductorREF. NO.C131, 132PART NO.VCTYPUl EX823KCl36VCKZPUl H

45、F102ZC203, 204VCTYPUl EX393KC207, 208VCTYPUl EX102KDESCRIPTIONCODEO.O82MFD, 25V, *lo%,ABSemiconductorO.OOlMFD, 5OV, +80-20%. AACeramicO.O39MFD, 25V. +lO%,A ASemiconductor0.001 MFD, 25V, +lO%,A ASemiconductorO.lMFD, 25V. 220%.ABSemiconductor270PF. 5OV, *lo%, Ceramic AAO.OlSMFD, lOOV, +5%,ABPolypropyl

46、ene0.082M FD, 25V, i lo%,ABSemiconductor0.056MFD. 25V. *lo%,ABc212VCTYPUl EX104MC301, 302VCKZPUl HB271 Kc303VCQPKV2AA183Jc304VCTYPUl EX823Kc305VCTYPUl EX563KSemiconductorC306VCTYPUl EX562KO.O056MFD, 25V, *lo%, AASemiconductorc307c401VCKZPUl HE561 KVCTYPUl EX223M56OPF. 5OV, ?lO%, Ceramic AAO.O22MFD,

47、25V, -+20%,ABSemiconductorC501, 502,IVCKZPUl HFlO320.01 MFD, 5OV. +80-20%,c503.504CeramicABRESISTORS(Unless otherwise specified resistors are /nW, i5%, Carbon type.)R3VRDST2EE3R3J3.3 ohmR4VRDSU2EE564J560K ohmR6VRD-SU2EE681 J680 ohmR28VRDSU2EE222J2.2K ohmR29VRDSU2EE680J68 ohmR40VRDSU2EE471J470 ohmR42

48、VRDSU2EE682J6.8K ohmR44VRD-SU2EE331 J330 ohmR61VRDSU2EElOl JlOOohmR63VRD-SU2EE330J33 ohm, AAR64.65VRDSU2EE470J47 ohmR66VRDSU2EElOOJ10 ohmR69VRDSU2EE471 J470 ohmRl07, 108VRDSU2EE560J56 ohmR123, 124VRDSUZEE123J12K ohmR134VRD-STZEEl 01 J100 ohmR135VRDSU2EE824J820K ohmR137VRDST2EE330J33 ohmR205VRDST LEE

49、102JIKohmI3206VRDST2EE682J6.8K ohmR211.212VRD-SJZEElOl J100 ohmR217,218VRDSU2EE223J22K ohmR303VRDSlJZEE15OJ15 ohmR304VRDST2EE182J1.8K ohmR305VRDST2EElOOJ10 ohmIMECHANISM PARTS92LM-BUTON277A Button, FunctionAC(GF-4949ZG)92LM-BUTON244A Button, Function(GF4949ZS)92LMBUTON277B Button, Eject (GF-4949ZG)

50、.AD92LM-BUTON Button, Eject (GF4949ZSt A D92 LM-SUPTl52ABracket, Flywheel92LCUSN133ACushion Rubber, Motor92LMCASY 1529Sl Mechanism Chassis Assembly AWScrew, Slip Roller AssemblyA A92LM-S-ROLI 52ASlip Roller Assembly3.3mm Dia. x 0.5mmREF. NO.PART NO.DESCRIPTIONCODEREF. NO.PART NO.0692LM-S-CHSl52A0792