Teac-AGD7900-rec-sm 维修电路原理图.pdf

A AG G- -D D7 79 90 00 0SERVICE MANUALAV Digital Home Theater ReceiverEffective : February, 2002S-0000ANOTESPC boards shown are viewed from parts side.The parts with no reference number or no parts number in theexploded views are not supplied.As regards the resistors and capacitors, refer to the circuit diagramscontained in this manual.Parts marked with this sign are safety critical components. Theymust be replaced with identical components - refer to the appropriateparts list and ensure exact replacement.RadioFans.CN 收音机爱 好者资料库2CONTENTSSPECIFICATIONS.3SAFETY INSTRUCTIONS .4MEASUREMENTS AND ADJUSTMENTS .5FIP DISPLAY .8DISPLAY PIN CONNECTION .9IC BLOCK DIAGRAMS AND PIN FUNCTIONS .10EXPLODED VIEWS AND PARTS LIST .22PC BOARDS AND PARTS LIST .24INCLUDED ACCESSORIES .30RadioFans.CN 收音机爱 好者资料库3Amplifier SectionSurround Output Power (0.9 % THD, 1 kHz, 8 ohms):60 + 60 watts (Front)60 watts (Center)60 + 60 watts (Rear)Delay Time:DOLBY DIGITAL: REAR 0 15 msCENTER 0 5 msDOLBY PRO LOGIC: REAR 15 30 msAudio Input Sensitivity/Impedance:*LINE: 220 mV/47 k ohmsOutput Level/Impedance: CD-R/TAPE REC: 200 mV/2.2 k ohmsFrequency Response:*LINE: 20 Hz 65 kHz, +1/ 3 dBSignal-to-Noise Ratio:*LINE: 95dB (IHF-A)Tone Control:BASS: 10 dB at 100 HzTREBLE: 10 dB at 10 kHzDigital Audio SectionSampling Frequency:32 kHz, 44.1 kHz, 48 kHz, 96 kHzDIGITAL Input Level/Impedance: DIGITAL 1, 2 (OPTICAL): 15 dBm 21 dBmDIGITAL 3 (COAXIAL): 0.5 Vp-p / 75 ohmsFM Tuner Section(Without notes 100.1 MHz, 65 dBf)Tuning Range:87.5 MHz 108.0 MHz (100 kHz steps)Usable Sensitivity (IHF):Mono: 11.2 dBf 50 dB Quieting Sensitivity:Mono: 15.3 dBf Stereo: 38.5 dBf Capture Ratio:2.0 dB Image Rejection Ratio: 45 dB AM Suppression Ratio: 55 dBTotal Harmonic Distortion (1 kHz):Mono: 0.4%Stereo: 0.5%Frequency Response:30 Hz 15 kHz, +1/ 1.5 dBStereo Separation (1 kHz):40 dBSignal-to-Noise Ratio:Mono: 75 dBStereo: 70 dBAM Tuner SectionTuning Range:530 kHz 1,720 kHz (10 kHz steps)Usable Sensitivity:55 dB/mTotal Harmonic Distortion:0.8% at 85 dB/mSignal-to-Noise Ratio:45 dB at 85 dB/mVideo SectionInput Sensitivity/Impedance:1.0 Vp-p/75 ohmsOutput Level/Impedance:1.0 Vp-p/75 ohmsGeneralPower Requirements:120 V AC, 60 Hz (U.S.A./ Canada model)120/230 V AC, 50-60Hz (General Export model)Power Consumption:2.5 A AC Outlets:Switched x 2, Total 100 W max. (1 A max.)Dimensions (W x H x D)435 x 165 x 350 mm (17-1/8 x 6-1/2 x 13-3/4)Weight (net):8.2kg (18-1/16lbs) (U.S.A./ Canada model)8.4kg (18-1/2lbs) (General Export model)Standard Accessories:AM Loop Antenna x 1FM T-type Antenna x 1Remote Control Unit (UR-417) x 1*LINE means CD, CD-R/TAPE, VCR/VIDEO 1, DBS/VIDEO 2,DVD/VIDEO 3 and AUX/VIDEO 4. Improvements may result in specifications and featureschanging without notice. Illustrations may differ slightly from production models.SPECIFICATIONS4SAFETY INSTRUCTIONSPRECAUTIONS DURING SERVICING1. Parts identifide by the ( )symbol parts are criticalfor safety. Replace only with parts number specified.2. In addition to safety, other parts and assemblies arespecified for conformance with such regulations asthose applying to spurious radiation.These must also be replaced only with specifidereplacements.Examples :RF converters, tuner units, antennaselectswitches, RF cables, noise blocking capacitors,noise blocking filters, etc.3.Use specified internal wiring. Note especially :1) Wires covered with PVC tubing2) Double insulated wires3) High voltage leads4. Use specified insulating materials for hazardous liveparts. Note especially:1) Insulation Tape2) PVC tubing3) Spacers(insulating barriers)4) Insulation sheets for transistors5) Plastic screws for fixing micro switches5. When replacing AC primary side components(transformers, power cords, noise blockingcapacitors, etc.), wrap ends of wires securely aboutthe terminals before soldering.6. Make sure that wires to do not contact heatproducing parts (heat sinks, oxide metal filmresistors, fusible resistors, etc.).7. Check that replaced wires do not contact sharpedged or pointed parts.8. Also check areas surrounding repaired locations.9. Make sure that foreign objects (screws, solderdroplets, etc.) do not remain inside the set.MAKE YOUR CONTRIBUTION TO PROTECTTHE ENVIRONMENTUsed batteries with the ISO symbol for recyclingas well as small accumulators (rechargeablebatteries), mini-batteries (cells) and starterbatteries should not be thrown into the garbagecan. Please leave them at an appropriate depot. All other house-hold batteries can be thrown out with the household waste.SAFETY CHECK AFTER SERVICINGAfter servicing, make measurements of leakage-currentor resistance in order to determine that exposed partsare acceptably insulated from the supply circuit.The leakage-current measurement should be donebetween accessible metal parts (such as chassis,ground terminal, microphone jacks, signal input/outputconnectors, etc.) and the earth ground through aresister of 1500 ohms paralleled with a 0.15 capacitor, under the units normal working conditions.The leakage-current should be less than 0.5mA rms AC.The resistance measurement should be done betweenaccessible exposed metal parts and power cord plugprongs with the power switch (if included) ON. Theresistance should be more than 2.2M Ohms.PRECAUTIONS IN REPAIRINGWhen repairing or adjusting the unit, please note thefollowing points.1. Do not put excessive pressure on the mechanicalpart (operation part), including the pick-up block, asextremely high mechanical precision is required inthese parts.2. When the base is removed for repair adjustment,make sure that there are no metal obiects in thenarrow gap between the P. C. board or the mechaparts and the base3. The Micro-Computer and the CD signal processingICs can be damaged by static electricity or leakagefrom a soldering iron during repairing. Whilesoldering, please take the precautions againstleakage as in the illustration.4. Do not loosen any screws in the pick-up block.When handing the pick-up block, please refer to thepoints to NOTE when replacing the pick-up block.5. Keep safety for hazardous invisible Laser Radiation,DO NOT watch the Laser Beam (Objective lens)directly.6. Models for some countries, laser warning labels areaffixed on the unit and inside of the unit, as shownbelow. Read it carefully for your safety, whenrepairing or adjusting the unit.GNDALIGNMENT INSTRUCTIONSEQUIPMENT NEEDED:AM Signal GeneratorFM Signal GeneratorOscilloscopeVTVM(AC, DC)Test loop antenna (AM Adjustment)Dummy antenna (FM Adjustment)Distortion analyserIMPORTANT1. Check power-source voltage.2. Set the function switch to band aligned.3. Keep the signal input as low as possible to adjust accurately.4. Modulation and modulation frequency.ItemModulationModulation frequencyBandAM30%400HzFM400HzADJUSTMENT POINTMEASUREMENTS AND ADJUSTMENTS100% (40 kHz Dev.) E/UK100% (75 kHz Dev.) USAM LOOP ANTANT TERMINALCT10PACK1IC11J208VR11VR13IC12T102FM ANTVR12J207J205L104L105T101(FOR UL version)L3L7L4L5L6L3L7T1L6L4L5L3L6L4FM OSC COILT1FM IFTFM OFFSET ADJ TPCT10 AM ANT TRIMMER (1503kHz/1510kHz)L104 AM ANT COILL105 AM OSC COILT101 FM IFT COILT102 AM IFT COIL (612kHz/610kHz)VR13 FM SD ADJUSTMENTVR12 AM SD ADJUSTMENTVR11 FM SEPARATION ADJJ208 FM/AM VTJ205J207FM ANT COILFM RF COIL(FOR EUR version)L1L2L6L3L4L5L1L2L5L7IFTFM OSC COILL7FM ANT COILFM RF COIL51.TUNING FREQUENCY RANGE ADJUSTMENTS(FM) DC VOLTMETER . CONNECT TO TEST POINT J208 and GNDNO.BandFrequencyAdjust forAdjustment1FM87.50MHz1.6VL72AM530 kHz1VL105US/C530 kHz1VL1052.AM TRACKING ADJUSTMENTSignal Generator. Connects to the AM ANT. Coil through the loop antenna.Adjust for the indication of VTVM of the wave form of scope to be maximum.BANDStepFrequencyAdjust forAdjustment1610 kHzMaximum sensitivityT102, L104US/C610 kHzMaximum sensitivityT102, L10421510 kHzMaximum sensitivityCT10US/C1510 kHzMaximum sensitivityCT103Repeat steps 1 and 2 several times.AMJ2083.FM-RF ADJUSTMENTSignal Generator. Connect to FM ANT JACK (FM IN) through the dummy.NO.FrequencyAdjust forAdjustment190.10MHzMaximum SensitivityL3, L5, L62Repeat step 1 several times.64.FM MONO DISTORTION ADJUSTMENTDC VOLT METER.Connect to J205 (-), J207 (+) through the chock coil (100uH).Signal Generator.Connect to FM ANT Jack (FM IN) through the dummy.Distortion Meter .Connect to the output.NO.FrequencyAdjust forAdjustment1100.10MHz2100.10MHz3Repeat steps 1 and 2 several times.5.FM/AM AUTO STOP LEVEL ADJUSTMENTFM Signal Generator.Connect to FM ANT Jack (FM IN) through the dummy.AM Signal Generator.Connect to AM ANT. Coil through the Loop antenna.J205J207DC Voltmeter 0VMinimum T.H.D7DC Voltmeter 0VT101T101BANDStep Signal Generator Adjust for Adjustment1 990KHz 82dB Display ON VR12US/C990KHz2 990KHz 81dB Display OFFVR12US/C990KHz1 100.1MHz 32dBDisplay ON VR132 100.1MHz 31dB Display OFF VR13TUNEDTUNEDTUNEDTUNEDAMFM810G9G8G7G6G5G4G3G2G1GP1SOURCEd2d2d2d2d2d2d2d2kHzP2AUXd1d1d1d1d1d1d1d11dP3LDeeeeeeee1eP4DVDrrrrrrrr1cP5VCR 1pppppppp1gP6RECnnnnnnnn1fP7cccccccc1bP8SP.ffffffff1aP9AggggggggMP10Bmmmmmmmm2dP11CHURCHhhhhhhhh2eP12DISCOjjjjjjjj2cP13STADIUMkkkkkkkk2gP14HALLbbbbbbbb2fP15THEATERa2a2a2a2a2a2a2a22bP16PCMa1a1a1a1a1a1a1a12aP17AC-3S1S1S1S1S1S1S1S1DELAY.TP18STEREOS2S2S2S2S2S2S2S2PRESET CH.P193S3S3S3S3S3S3S3S3MEMOP20S4S4S4S4S4S4S4S4TAPEP21DIGITALRDSDpTAMHzP22PRO LOGICDTSTUNEDSTEREOPTYRTTPmSANODE CONNECTIONFIP DISPLAY9Pin No.4647F1F1Pin No.313233343536373839404142434445NXNXNXNX1G2G3G4G5G6G7G8G9G10GNPPin No.161718192021222324252627282930P14P13P12P11P10P9P8P7P6P5P4P3P2P1NXPin No.123456789101112131415F2F2NPNXNXNXNXP22P21P20P19P18P17P16P15ConnectionConnectionConnectionConnectionPIN CONNECTION471PIN No.SYMBOLI/ODESCRIPTION1,25VDD-Power Supply Port(+5V)2,3Function SW1,SW2IFunction Encoder Control Port4Speaker ON/OFFOFront Speaker Relay Drive Port(“H”)5NC-Not Use(No connection)6DSP ResetOReset (Initial Clear) Port for YSS9127Surr. CLKOSurr. CLK Output Port8DATA OUTOData Output Port for YSS9129Surr. DATAOSurr. DATA Output Port10CSOChip Selector Port for YSS91211CSOChip Selector Port for AK411212CSBNOSub DSP Chip Selector for YSS91213,14RDS CLK/DATAIRDS IC(SA6579TV1) CLK/DATA Port15Stereo INIStereo Display Control Port(L)16Tuned INITuned Display Control Port(L)17 21KEY MatrixIResistor Divide Key Control Input (17,18 Pin: NOT USE)22,30Vss-Device GND Port23Vass-Device Analog GND Port24Varef-A/D Converter Reference Voltage26BACKUPIBack Up Mode Control Input27TEST-NC(GND)28,29VOLUME UP/DOWNIMaster Volume Up/Down Control Port31X INI8MHz Crystal Connection Port32X OUTO33RESET (L)IReset Input 34REMOTE INIRemote Control Sensor Data Input35BUS IN(NC)ISystem Remote Control Input(No Connection)36HEADPHONE INOHeadphone JACK INPUT(“H”) - Connet to GND37E.VOL.DATAO38E.VOL.CLKIElectronic Vol. IC(M62446FP) DATA/CLK/STB Port39E.VOL.CEO40PLL.DATA INIPLL IC (LC72131) DATA Input Port41PLL.CEOPLL IC (LC72131) Chip Enable Control Port42DATA 3OFunction IC Data Input Port43CLK 3OFunc./PLL IC CLK Control Port44FUNC. STBOFunction Strobe Control Output45FUNC. MUTEOFunction Mute Control Output(“H”)46SURR. MUTEOSurrounc Mute Control Output(“H”)47Power ON/OFFOPower ON/OFF Control Port(H)48SURR. HOSurr. ON/OFF Contol Port(H)49PROTECT INIProtect Input Port(L)50FIP Vkk-FIP (FLT) -28V Negative Power Supply For FIP Blinking51 60FIP GridOFIP (FLT) Grid Control Outputs61 82FIP SegmentOFIP (FLT) Segment Control Outputs83 86OptionlArea/Function Option Ports87 94N.C-Not Use(No connection)95SUB. LEDOSubwoofer LED Drive Port96MUTE LEDOMUTE LED Drive Port97 99VIDED A/B/COVideo IC(NJM2296M/LA7952) Control Ports100N.C-Not Use(No connection)IC PIN FUNCTION (u-COM : ANAM1308AT,O.T.P :TMP87PM78F) : IC711011PIN No.SYMBOLI/ODESCRIPTION1,31,712345678910, 301112131415161718192021,41,51,81,9122232425 2932 3536 3940,50,60,80,90,10042 4445 4748495253545556575859616263646566676869VDD1RAMCENRAMA16RAMA15SDIB0SDIB1SDIB2XIXOVSSAVDDSDIB3TESTTESTOVFBDTSDATAAC3DATASDOB3CPOAVSSVDD2SDOA2SDOA1SDOA0RAMA 1410OPORT 03OPORT 47VSSRAAM 97SDOB 20SDBCK1SDWCK1NONPCMCRCMUTEKARAOKESURENC/SDBCK 0RAMA6RAMA5RAMA4/ICTESTRAMA3/CSB/CSSOSISCK-OOOI+I+I+I+O-I+-OOOOA-OOOOOO-OOI+I+OOOOOOOOOIs-OIs+IsOtIsIs+5V Power Supply(for I/Os)External SRAM interface /CEExternal SRAM interface address 16External SRAM interface address 15PCM input 0 to Sub DSP(not use)PCM input 1 to Sub DSP(not use)PCM input 2 to Sub DSP(not use)Crystal oscillator connection(12.288MHz)Ground+3.3V power supply (for PLL circuit)PCM input 3 to Sub DSP(not use)Test terminal(to be open in normal use)Test terminal(to be open in normal use)Detection of overflow at Sub DSP (not use)Detection of DTS data (not use)Detection of AC-3 data (not use)PCM output from Sub DSPOutput terminal for PLL,to be connected to ground through the external analog filter circuitGround for PLL circuit)+3.3V power supply (for core logic)PCM output from Main DSP (C,LFE)PCM output from Main DSP (LS,RS)PCM output from Main DSP (L,R)External SRAM interface address 1410Output port for general purposeOutput port for general purpose (not use)GroundExternal SRAM interface address 97PCM output from Sub DSPBit clock input for SDOA,SDIB,SDOB (not use)Word clock input for SDOA,SDIB,SDOB (not use)Detection of non-PCM data (not use)Detection of AC-3 CRC error (not use)Detection of auto mute (not use)Detection of AC-3 karaoke data (not use)Detection of AC-3 2/0 mode Dolby surround encoded input (not use)Inverted SDBCK0 clock output (refer to Block diagram)External SRAM interface address 6External SRAM interface address 5External SRAM interface address 4Initial clearTest terminal (to be ofen in normal use)External SRAM interface address 3Sub DSP Chip selectMicroprocessor interface Chip select inputMicroprocessor interface serial data outputMicroprocessor interface /Sub DSP Serial data inputMicroprocessor interface /Sub DSP clock inputDolby Digital/Pro Logic DTS DECODER (YSS912C:INPUT IC43)1213PIN No.SYMBOLI/ODESCRIPTION7072 79828384858687888992 99RAMA2RAMD07SDWCK0SDBCK0SDIA0SDIA1RAMA1RAMA0RAMWENRAMOENIPORT70OI+/OIIIIOOOOI+External SRAM interface address 2External SRAM interface data (STREAM07 output when External SRAM is not in use)Word clock input for SDIA, SDOA, SDIB, SDOBBit clock input for SDIA,SDOA,SDIB,SDOBAC-3 Bitstream (or PCM) data input for Main DSPAC-3 Bitstream (or PCM) data input for Main DSPExternal SRAM interface address 1External SRAM interface address 0External SRAM interface /WEExternal SRAM interface /OEInput port for general purpose (not use)NOTE)Is: Schmidt trigger input terminalIt: Input terminal with pull-up resistorO: Digital output terminalOt: Tri-state digital output terminalA: Analog terminal100 99 98 97 96 95 94 93 92 91 90 89 88 87 86 85 84 83 82 8131 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 508079787776757473727170686766656463626160695857565554535251591VDD1VSSIPORT0IPORT1IPORT2IPORT3IPORT4IPORT5IPORT6IPORT7VDD2VSSRAMOENRAMWENRAMA0RAMA1SDIA1SDIA0SDBCK0SDWCK0VDD2VDD1OPORT0OPORT1OPORT2OPORT3OPORT4OPORT5OPORT6OPORT7VDD2VSSRAMA9RAMA8RAMA7SDOB2SDOB1SDOB0SDBCK1SDWCK1VSSRAMCENRAMA16RAMA15SDIB0SDIB1SDIB2XIXOVSSAVDDSDIB3TESTTESTOVFBDTSDATAA