Yamaha-TX396L-tun-sm(1) 维修电路原理图.pdf

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1、TX-396LSERVICE MANUALAM/FM STEREO TUNERTX-396LThe data provided is believed to be accurate and applicable to the unit(s)indicated on the cover. The research, engineering, and service departmentsof YAMAHA are continually striving to improve YAMAHA products.Modifications are, therefore, inevitable and

2、 specifications are subject tochange without notice or obligation to retrofit. Should any discrepancyappear to exist, please contact the distributors Service Division.WARNING:Static discharges can destroy expensive components.Discharge any static electricity your body may haveaccumulated by groundin

3、g yourself to the ground buss inthe unit (heavy gauge black wires connect to this buss).IMPORTANT:Turn the unit OFF during disassembly and partreplacement. Recheck all work before you apply powerto the unit.100700I CONTENTSTO SERVICE PERSONNEL . 1SPECIFICATIONS. 1INTERNAL VIEW . 2REAR PANELS . 2DISA

4、SSEMBLY PROCEDURES . 2ADJUSTMENTS . 37COM DATA . 8DISPLAY DATA . 9BLOCK DIAGRAM. 1011PRINTED CIRCUIT BOARD . 1213SCHEMATIC DIAGRAM . 1415PARTS LIST . 1621This manual has been provided for the use of authorized YAMAHARetailers and their service personnel.It has been assumed that basic service procedu

5、res inherent to the industry,and more specifically YAMAHA Products, are already known andunderstood by the users, and have therefore not been restated.WARNING:Failure to follow appropriate service and safetyprocedures when servicing this product may result inpersonal injury, destruction of expensive

6、 components,and failure of the product to perform as specified. Forthese reasons, we advise all YAMAHA product ownersthat any service required should be performed by anauthorized YAMAHA Retailer or the appointed servicerepresentative.IMPORTANT:The presentation or sale of this manual to any individua

7、lor firm does not constitute authorization, certification orrecognition of any applicable technical capabilities, orestablish a principle-agent relationship of any form.IMPORTANT NOTICETX-396LP.O.Box 1, Hamamatsu, JapanRadioFans.CN 收音机爱 好者资料库TX-396L263.511.33.2701627886435WALLOUTLETEQUIPMENTUNDER TE

8、STAC LEAKAGETESTER OREQUIVALENTINSULATINGTABLE1I TO SERVICE PERSONNELCritical Components Information.Components having special characteristics are markedand must be replaced with parts having specificationsequal to those originally installed.WARNING: CHEMICAL CONTENT NOTICE!The solder used in the pr

9、oduction of this product contains LEAD. In addition, other electrical/electronic and /or plastic(where applicable) components may also contain traces of chemicals found by the California Health and Welfare Agency(and possibly other entities) to cause cancer and/or birth defects or other reproductive

10、 harm.DO NOT PLACE SOLDER, ELECTRICAL/ELECTRONIC OR PLASTIC COMPONENTS IN YOUR MOUTH FOR ANY REA-SON WHATSOEVER!Avoid prolonged, unprotected contact between solder and your skin! When soldering, do not inhale solder fumes or exposeeyes to solder/flux vapor!If you come in contact with solder or compo

11、nents located inside the enclosure of this product, wash your hands beforehandling food.I SPECIFICATIONSI FM SECTIONTuning Range 87.50 to 108.00 MHz50dB Quieting Sensitivity (IHF)Mono1.55 V(15.1 dBf)Stereo (1 kHz 100% MOD)21 V(37.7 dBf)Usable Sensitivity (DIN)Mono (S/N 26 dB)0.9 VStereo (S/N 46 dB)2

12、4 VAlternate Channel SelectivitySelectivity (two signals) 40 kHz Dev. 300 kHz 70 dBSignal to Noise Ratio (DIN-Weighted 40 kHz)Mono75 dBStereo70 dBHarmonic Distortion 1 kHzMono0.1 %Stereo0.2 %Stereo Separetion 1kHz (40 kHz Dev.)50 dBFrequency Response20 Hz to 15 kHz00.5 dBI MW SECTIONTuning Range 531

13、 to 1611 kHzUsable Sensitivity200 V/mSignal to Noise Ratio50 dBHarmonic Distortion 1 kHz0.3 %I LW SECTIONTuning Range153 to 288 kHzUsable Sensitivity400 V/mSignal to Noise Ratio50 dBHarmonic Distortion 1 kHz0.3 %I AUDIO SECTIONOutput Level/Impedance (Fixed)FM 100 % MOD 1 kHz500 mV/2.2 kMW/LW 30 % MO

14、D 1 kHz200 mV/2.2 kI GENERALPower Supply AC230V, 50HzPower Consumption7 WDimensions (W x H x D)435 x 86 x 278mmWeight3.2 kg* Specifications subject to change without notice. DIMENSIONS MODEL COLORBlack and GoldRadioFans.CN 收音机爱 好者资料库TX-396L2345612I INTERNAL VIEWI REAR PANEL1 Tuner P. C. B (1)2 Front

15、-end pack3 Operation P. C. B. (2)4 Tuner P. C. B. (2)5 Operation P. C. B. (1)6 Operation P. C. B. (3)I DISASSEMBLY PROCEDURES (Remove parts in the order as numbered.)1. Removal of Top CoverRemove 4 screws (1) and 2 screws (2) in Fig. 1.2. Removal of Front Panela. Disconnect the connectors (CB3 anf C

16、B4) in Fig. 1.b. Remove 2 plastic rivets (3) in Fig. 1.c. Remove 5 screws (4) in Fig. 1.d. Unhook at 2 place (5) in Fig. 1.TX-396LFMSGOscilloscopeACVMDIST. MFMANTLROUTPUTGNDFMdummyantennaTunerP. C. B.FMSGOscilloscopeACVMDIST. MFMANTLRYLF-15(LPF)OUTPUTGNDFMdummyantennaTunerP. C. B.SSGFMSGOscilloscope

17、ACVMDIST. MFMANTLROUTPUTGNDFMdummyantennaTunerP. C. B.oscillatorFMSGDCVMFMANTTP1TP2R51GNDFMdummyantennaTunerP. C. B.oscillator3I ADJUSTMENTS1. Before Adjustment(1)With the power turned on, wait for 5 minutes beforestarting adjustment so that operation becomes stable.(2)Adjust the OSC coil and IFT wi

18、th insulated screwdriver.(3)Set the TUNING MODE to AUTO.(4)Decibel abbreviationsdB : Decibels above or below 1VExample :0dB = 1 v, 60dB = 1 mVX dB = (X + 11.2) dBfWhen substituting 60 for X,60 dB = 72.2 dBf2. Measuring instrument abbreviationsFM SG: FM signal generatorSSG: Stereo signal generatorAM

19、SG: AM signal generatorDIST. M: Distortion meterFC: Frequency counterACVM: AC voltage meterDCVM: DC voltage meterCheck that the voltage obtained across each test pointand ground on the tuner circuit is as follows.Test pointsRating or Standard+5 V terminal+5.6 0.5 V-VP terminal-23.0 1.0 VCAUTION :Bef

20、ore setting to the TEST mode, write down the userpreset memory content in the table as shown below. (Thisis because setting to the TEST mode will cause thememory content to be the factory preset memory content,i.e. all the user preset memory content will be erased.)Preset keysP1P2P3P4P5P6P7P8ABCDETu

21、rn on the POWER switch while pressing the A/B/C/D/E and FM/AM(FM/MW/LW) keys simultaneously, andthe unit enters the TEST mode for the display check.After this, repeat (1) to (4).(1)All the segments on the display light up.(2)The model name, TX-396L is displayed.(3)The place of destination is display

22、ed.(4)The COM-version is displayed.Pressing the P1 key will cause operation to start from (1).Pressing any other key will cause the mode to return to theNORMAL mode.PresetP1P2P3P4P5P6P7P8A, E87.5090.1095.1098.10108.0088.10106.10 108.00B, D63010801440531161190013501404C1531712252702881802072521) Disc

23、riminator balance adjustment2) Monaural distortion adjustment3) Stereo distortion adjustment4) Sensitivity verificationTX-396LLINE OUTAM ANT GNDFM ANTLRL13 L12 VR4VR3R51J6J7VR2VR1L10L5L8PK2PK1J73TP2TP1TP3DISCRIMINATORBALANCEMONAURALDISTORTIONFRONTENDIFTSTEREODISTORTIONAM SENSITIVITYSEPARATIONSIGNALM

24、ETERG TEST POINTS4Adjustment itemRough adjustment ofdiscriminator balance.Rough adjustment ofmonaural distortion.Fine adjustment ofdiscriminator balance.Fine adjustment ofmonaural distortion.Verification ofdiscriminator balance.Adjustment of frontendIFT.Adjustment of stereodistortion.Step1234567Sign

25、al (ANT IN)FM SG:98.1 MHz 70 dBModulation : 100 %Monaural : 1 kHzSame as Step 1.Same as Step 1.Same as Step 1.Same as Step 1.FM SG:98.1 MHz 30 dBModulation : 100 %Monaural : 1 kHzFM SG:98.1 MHz 70 dBModulation : 100 %Stereo L or R : 1 kHzAdjustedpointL8(right side)L8(left side)L8(right side)L8(left

26、side)FrontendIFTVR1, VR2ReceptionfrequencyPresetA-4: 98.1 MHzSame as Step 1.Same as Step 1.Same as Step 1.Same as Step 1.Same as Step 1.Same as Step 1.RatingDC 0 V 100mVat tuning point.Minimize distortion.DC 0 V 50mVMinimize distortion.(to less than 0.7%)DC 0 V 50mVAdjust so that theDC voltage ismax

27、imum.CAUTION:If IFT core is turnedexcessively, thesensitivity reduces. (Maximum 90)Minimize distortion.Tuning mode isAUTO.Test pointTP1, TP2(both endof R51)OUTPUTTP1, TP2OUTPUTTP1, TP2TP3, GNDOUTPUTTX-396L5Adjustment itemVerification of monauraldistortion.Verification of stereodistortion.Verificatio

28、n ofsensitivity.Adjustment ofseparation.Adjustment of the signalmeter.Verification of the signalmeter to turn off.Verification of AUTOTUNING.Step891011121314Signal (ANT IN)FM SG:98.1 MHz 70 dBModulation : 100 %Monaural : 1 kHzFM SG:98.1 MHz 70 dBModulation : 100 %Stereo L or R : 1 kHzFM SG:88.1/98.1

29、/106.1 MHzModulation : 100 %Monaural : 1 kHzFM SG:98.1 MHz 70 dBModulation : 100 %Stereo L or R : 1 kHzFM SG:98.1 MHz 45 dBModulation : 30 %Monaural : 1 kHzANT input minimum.FM SG:98.1 MHz 23 dBModulation : 30 %Stereo L or R : 1 kHzAdjustedpointVR4VR3TuningbuttonsReceptionfrequencySame as Step 1.Sam

30、e as Step 1.A-6: 88.1 MHzA-4: 98.1 MHzA-7: 106.1 MHzPresetA-4: 98.1 MHzPresetA-4: 98.1 MHzPresetA-4: 98.1 MHzRatingMinimize distortion.(to less than 0.7%)Minimize distortion.(to less than 1.4%)Tuning mode isAUTO.S/N should be 30 dBat each frequency of88.1 MHz, 98.1 MHzand 106.1 MHz.Make sure that th

31、evoltage at the ANTterminal is 7 dB orless.To more than 35 dB.Tuning mode isAUTO.Adjust so that thesignal meter ismaximum at ratinglevel.Make sure that thesignal meter isturned off.Automatic receptionshould be availablewhen the tuning UPor DOWN key ispressed.Stereo indicator isturned on.Audio muting

32、 shouldbe applied duringtuning.Test pointOUTPUTOUTPUTOUTPUTSignalmeterTX-396L6AMSGAM ANTGNDAM dummy antennaAM loop antennaTo be adjusted after FM section adjustment.Use the specified dummy anetenna for loop antenna.Adjustment itemAdjustment ofsensitivity.Verification ofsensitivity.Verification of th

33、e signalmeter.Verification of autotuning.Step1234Signal (ANT IN)AM SG:630 kHz 50 dB,1 kHz,30% modulationAM SG:630 kHz/1080 kHz/1440 kHz 50 dB,1 kHz,30% modulationAM SG:1080 kHz 90 dB,ANT input 90 dBANT input -10 dB orlessAM SG:1080 kHz 60 dB,1 kHz,30% modulationAdjustedpointL5TuningbuttonReceptionfr

34、equencyPresetB-1: 630 kHzPresetB-1: 630 kHzB-2: 1080 kHzB-3: 1440 kHzPresetB-2: 1080 kHzPresetB-2: 1080 kHzRatingMaximize detectedsignal output.To be less than 54dB.Make sure that thesignal meter isturned on.Make sure that thesignal meter isturned off.Automatic receptionshould be availablewhen the t

35、uning UPor DOWN key ispressed.Audio muting shouldbe applied duringtuning.Test pointOUTPUTTX-396LAMSGAM ANTGNDAM dummy antennaAM loop antenna7Adjustment itemVerification ofsensitivity.Verification of the signalmeter.Verification of autotuning.Step123Signal (ANT IN)AM SG:171 kHz/225 kHz/270kHz 90 dB,1

36、 kHz,30% modulationAM SG:225 kHz 90 dB,ANT input 90 dBANT input -10 dB orlessAM SG:225 kHz 60 dB,1 kHz,30% modulationAdjustedpointTuningbuttonReceptionfrequencyPresetC-2: 171 kHzC-3: 225 kHzC-4: 270 kHzPresetB-2: 225 kHzPresetB-2: 225 kHzRatingTo be less than 66dB.Make sure that thesignal meter istu

37、rned on.Make sure that thesignal meter isturned off.Automatic receptionshould be availablewhen the tuning UPor DOWN key ispressed.Audio muting shouldbe applied duringtuning.Test pointOUTPUTTo be adjusted after MW section adjustment.Use the specified dummy anetenna for loop antenna.TX-396LI-COM DATAI

38、C501 : LC866420A8 bit -COM8No.PortI/ONameFunction1P17/PWM0O/MMUTEMain mute2P30IROT1Rotary encoder input3P31IROT0This input available for ROTSW=H4P32IMODELModel 05P33IROTSWRotary encoder yes(H) or no(L)6P70/INT0I7/RESI/RESETReset8/P74/XT1I9P75/XT2I10VSS1IGNDGND11CF1CF6MHz12CF2CF6MHz13VDD1IVDD+5V14P80

39、/AN0ADIKEYIN1AD key input15P81/AN1ADIKEYIN2AD key input16P82/AN3ADIKEYIN3AD key input17P83/AN3ADIMETERSignal level input18P84/AN4I19P85/AN5I20P86/AN6I21P87/AN7ADIVERVersion input22P71/INT1I23P72/INT2I/POWERDOWNPower down detect24P73/INT3IREMREM input25S0/T0O13GFL segment26S1/T1O12GFL segment27S2/T2O

40、11GFL segment28S3/T3O10GFL segment29S4/T4O9GFL segment30S5/T5O8GFL segment31S6/T6O7GFL segment32S7/T7O6GFL segment33S8/T8O5GFL segment34S9/T9O4GFL segment35S10/T10O3GFL segment36S11/T11O2GFL segment37S12/T12O1GFL segment38S13/T1339S14/T1440S15/T15No.PortI/ONameFunction41VDD2IVDD+5V42VPIVDDVPP24V43S1

41、6/PC0OP1FL segment44S17/PC1OP2FL segment45S18/PC2OP3FL segment46S19/PC3OP4FL segment47S20/PC4OP5FL segment48S21/PC5OP6FL segment49S22/PC6OP7FL segment50S23/PC7OP8FL segment51S24/PD0OP9FL segment52S25/PD1OP10FL segment53S26/PD2OP11FL segment54S27/PD3OP12FL segment55S28/PD4OP13FL segment56S29/PD5OP14F

42、L segment57S30/PD6OP15FL segment58S31/PD7O59S32/PE0I/O60S33/PE1I/O61S34/PE2I/O62S35/PE3I/O63S36/PE4I/O64S37/PE5I/O65P00O66P01O67P02O68P03O69P04O/TMUTETuner mute70P05O71P06O72P07O73VSS2IGNDGND74P10/S00O75P11/SI0SIN76P12/SCK0SCL77P13/SO1IPLLDAT-inData input from PLL78P14/SI1OPLLDAT-outData output for

43、PLL79P15/SCK1OPLL-CLKPLL clock80P16/BUZOPLLCEPLLCEKEY INPUTKey Input1234567Resistance ()0k1.8k2.7k3.9k6.8k13k39kExtent of AD00H15H16H3DH3EH64H65H8AH8BHB0HB1HD3HD4HF0HExtent of Voltage (V)0.000.410.411.191.191.951.952.702.703.443.444.124.124.69Pin No.14KEYIN1P3P4P5P6P7P8Pin No.15KEYIN2MODEEDIT (KMODE

44、)MEMORYPAGEP1P2Pin No.16KEYIN3FM/AM (MW/LW)TUNING DOWNTUNING UPTX-396L13G12G11G10G9G8G7G6G5G4G3G2G1GP1PRESETaaaaaaaaaaaAUTOP2MEMObbbbbbbbbbbkHzP3(PS)cccccccccccMHzP4PSdddddddddddSTP5(PTY)eeeeeeeeeeeB1P6PTYfffffffffffB2P7(RT)gggggggggggB3P8RThhhhhhhhhhhB4P9(CT)jjjjjjjjjjjB5P10CTkkkkkkkkkkkB6P11EONmmm

45、mmmmmmmmS1P12NEWSnnnnnnnnnnnEDITP13INFOpppppppppppPTY HOLDP14AFFAIRSrrrrrrrrrrrP15SPORTtttttttttttPIN NO.123456789101112131415161718CONNECTIONF1F1NPP15 P14 P13 P12 P11 P10P9P8P7P6P5P4P3P2P1PIN NO.1920212223242526272829303132333435CONNECTIONNC1G2G3G4G5G6G7G8G9G 10G 11G 12G 13GNPF2F29I DISPLAY DATA (1

46、3-BT-152GK)ANODE CONNECTIONPIN CONNECTIONNOTE:1) F1, F2 . Filament2) NP. No pin3) NC. No connection4) DL . Datum line5) 1G13G . GridABCDEFGHIJ1234567TX-396LFM 75GNDAMFM FRONT ENDRF AMPMIXERL2L3L4IC2 : LA1266Q3, 4Q10Q13L7FM IF AMPLEVEL DETL9CERAMICFILTERRF AMPAM COIL PACK PK2ANTCOILOSCCOILQ502RESETCM

47、OSTUNINGCONTROLLSIIC501LC866420A8 bit CPU*BD502V501C502BACKUPQ501POWERONCONTROL & DATA BUSREMOTECONTROLRECEPTERPOWERSUPPLYU501SW520POWER SWVP*B12V5VKEY BOARDIC1 : LC72130SW501 519MIXEROSCAGCQ16L10FM/AMMUTINGPLLST IND.MUTEXL3L12L13LPFL chR chMUTESWQ19,20Q22,23CONTROLDECODERDE-EMPHASISAMDETS. METERLED

48、DRIVERL5Q15QUADRATUREDETFM DETCOILIFBUFFERIFBUFFERVR1, 2Q2, 5OSCBUFFERPK11710CAHJKMN7DFOcqMN1GXY12CaF8B21GC58K7658PLL-COMAM/FM IF ICIC3 : LA3401MPX IC241151434561222211718201916231/2REFERENCEDIVIDERSWALLOW COUNTER1/16, 1/17 4bits12bits PROGRAMMABLEDIVIDERDATA SHIFT REGISTER LATCHPOWERONRESETC2BI/FUN

49、IVERSALCOUNTERPHASE DETECTORCHARGE PUMPUNLOCKDETECTOR789101113211I BLOCK DIAGRAM10ABCDEFGHIJ123457TX-396L6W503BSW519SW518R528R529TUNINGUPDOWNKEY3GNDTo OPE P.C.B.(1)DGVPFL2FL1To OPE P.C.B.(1)POWERTo TUNER P.C.B.(2)DGVPFL2FL1AC1*AC1124254065804164Note) Those parts marked with are not use.43218765TUNIN

50、G MODEAUTO/MANMONOMEMORYMANL/AUTO FMFM/MW/LWEDITA/B/C/D/EDGKEY3GNDVPFL2FL1From OPE P.C.B.(2)From OPE P.C.B.(3)To/From TUNER P.C.B.(1)GNDD5V*B/TMUTRSYNRCERDIRDORCLPLDOPLDIPLCLPLCE/MMUTMTRVERGNDDTo TUNER P.C.B.(2)From OPE P.C.B.(2)*BANGNDDGVPFL2FL1AC1*AC1-B121312411213241111222FM ANTGND AM ANTLINE OUT