Denon-AVC1880-avr-sm维修电路原理图.pdf

SERVICE MANUALMODEL AVR-1804/884 AVC-1880AV SURROUND RECEIVER / AMPLIFIER16-11, YUSHIMA 3-CHOME, BUNKYOU-KU, TOKYO 113-0034 JAPAN X0173V.01 DE/CDM 0307For U.S.A., Canada, Europe, U.K.,Asia, China,Taiwan R.O.C., Korea& Japan model前、必読。本機、火災、感電、対安全性確保配慮、法的電気用品安全法、所定許可得製造。従際、安全性維持、記載注意事項必守。本機仕様性能改良、予告変更。Please use this service manual with referring to the operating instructions without fail.Some illustrations using in this service manual are slightly different from the actual set.修理際、必取扱説明書参照上、作業行。本文中使用、説明都合上現物多少異場合。補修用性能部品保有期間、製造打切後8年。注意RadioFans.CN 收音机爱 好者资料库22 2AVR1804/884 / AVC-1880AVR1804/884 / AVC-1880SAFETY PRECAUTIONSThe following check should be performed for the continued protection of the customer and service technician.LEAKAGE CURRENT CHECKBefore returning the unit to the customer, make sure you make either (1) a leakage current check or (2) a line to chassisresistance check. If the leakage current exceeds 0.5 milliamps, or if the resistance from chassis to either side of thepower cord is less than 460 kohms, the unit is defective.(1) (2) 500V1M(1) (2) RadioFans.CN 收音机爱 好者资料库3 33AVR-1804/884 / AVC-1880AVR-1804/884 / AVC-1880LEVEL DIAGRAMSFRONT/CENTR/SURROUND/SURROUND BACKLEVEL DIAGRAMSFRONT/CENTR/SURROUND/SURROUND BACK20dB10dB0dB(200mV)-10dB-20dB6CH IN40dB30dB0dB(200mV)-10dB-20dB-12dB6CH INCD IN-10dBFS-30dBFS-20dBFS6CH IN6CH INCENTERSURROUNDSURROUND BACKDSP OUT-10dBFS-20dBFS-30dBFSD/A+MUTE6dBD/A OUT100mV REFD/A-10dBFS0dBFS-20dBFS-30dBFS-23dBFSD/A OUT70.8mV REF6dB6dBD/A OUT100mV REFCENTERSURR/SB6CH INCD IN0dBFSA/D+- -A/D10dB20dB30dB40dBFRONTINPUTBUFFERAMPA/D INREV AMPA/D INREV AMPA/D INREV AMPDIRDIGITALD/A OUTLPFREV AMPSW SUMREV AMP+HPFMUTEDSPD/A- - -SUM S/W+D/A0dBFSMUTE+ELECTRICVOLUMEPRE AMPTONEPOWER AMPSPK OUTFRONT2.83V(1W/8ohm)SPK OUTFRONTATTH/P OUT-18dB-15dBVOL 0025.5dB15.5dBVOL 00MUTE+15.5dB-18dBH/P OUT47mV(1W 8ohm)-35.5dB25.5dBSPK OUTCENTERSURROUNDSPK OUT2.83V(1W/8ohm)4 44AVR-1804/884 / AVC-1880AVR-1804/884 / AVC-1880SUB WOORERSUB WOORER10dB10.5dB6dBConfig1 -38dBFSConfig2-28dBFSLFE-20dBFS-30dBFSLFE6dB6dBFront D/A Out200mV ref6CH IN0dBFS-10dBFSD/AOdB10dB20dB30dB-10dB-20dB-30dB-5dB(200mV)(112mV)MUTE+D/ASUB_WOOFER- - -DSP OUTD/A OUTLPFSW SUMREV AMPREV AMP6CH INPUT+MUTEELECTRICVOLUMEPRE AMPSUB WOOFERPRE OUTSUB WOOFERPRE OUT150mV-15dB21.5dBVOL 00TO FRONT CH5 55AVR-1804/884 / AVC-1880AVR-1804/884 / AVC-1880BLOCK DIAGRAMBLOCK DIAGRAMLINE_1TV/DBSLINE_2LINE_3CRCBYDVD/VDPLINE_3LINE_2LINE_1CRCBYD-VIDEO INPUTJAPAN ONLYVCR2 OUTMULTI OUTEX_SREX_SLEX_FREX_FL6CH_INPUTEX_CFM ANTEX_SWAM ANTLOOP FILTERE3 ONLYMUTINGFROM u-COMFMFRONTENDIF FILTERPLL CIRCUITIF FILTERAM TUNINGIF AMPMPX ICFM & AMIF ICL.P.F-RLBUFF+HPF+-+L/R SUMDIGITALFILTERADCCODECAD1837VOLUMEVOLUMEDIGITALFILTERDAC+RMC GNDINCXA1511MRMC IN/OUTC-VIDEO INPUTCOMP-VIDEOINPUTDVD/VDPTV/DBSDVD/VDPTV/DBSVIDEO SWITCHVIDEO SWITCHVIDEO SWITCHVCR-1VCR-2VCR1 OUTV.AUXINHD-VIDEO OUTPUTLINE_3LINE_2LINE_1CRCBYS-VIDEO INPUTVIDEO SWITCHVIDEO SWITCHINHDVD/VDPTV/DBSVCR-1VCR-2V.AUXVCR-1 OUTVCR-2 OUTVCR2 OUTREC_SWITCHIGANALOG INDIGITAL INCOAXIALOPTICAL_4OPTICAL_3OPTICAL_2OPTICAL_1DVD/VDPCDR/TAPETV/DBSVCR1VCR2PHONO+CDV.AUXTUNER(JAPAN ONLY)ANALOG OUTCDR/TAPE OUTVCR1 OUTDIGITAL OUTRCLK1(68)TCLK1(65)ROM512K X 8TCLK2(47)RAM64K X 1674LV244BUFFERfs64fs64fs64fsRBCK(17)DIRLC89057W-VF4DIGITAL AUDIO DECODER-SERIAL DATAI/O PORTCOUTDIGITALFILTERADCFROM MICOMTC9274-011INPUT_SWITCHIGTC9273-004Lock DetectSelectorXMCKSelector&INPUTDEMODULATIONDATAfsRDATA(21)RLRCK(20)RMCK(16)256fsCCLKCLATCHCINALRCKMCLKABCLKASDATADSDATA1CLOCKCONTROL PORTVOLUMEFL/FR/C/SL/SR/SW/SBfs256fsMELODY 32PF6(41)RFS1(69)RCLK0(61)DR0(60)DR1(67)CLK_IN(132)DT0(56)TCLK0(57)+VOLUMEVOLUMEVOLUMEDIGITALFILTERVOLUMEVOLUMEDIGITALFILTERDIGITALFILTER+DACDAC+DACSW F SUM-TUNER PLLDATACXP740096u-COMCONTROL DATADIGITAL AUDIOAUDIO SWITCHINGTC9164TC9482VOLUMEEX_FLDSP_FLANA_HFPANA_INFLT DRIVERDATALC75721NEFL DRIVEREX_CCENTEREX_SRSRSWEX_SWEX_SLANA_HFPANA_INDSP_FRSLEX_FRREMOTE CONTIN/OUT12MHzRESONATORKEY_MATRIXTC9184TONEPOWER AMPTONE DFT CON.FL DISPLAY16-ST-42GNKSPK A+-+SPEAKER OUT+-+FRONT A LFRONT A RFRONT B L-SPK B+-SURR L+-SURR R+-FRONT B R+CENTER+BA7626BA7626YC12129154521314IC1001IC1004IC1001+5VMONITOR OUTQ653MONITOR OUTQ1014Q6561214131412133IC1004IC10083.3V2.5VDSPDSPDIRBA7626IC606OSDLC7478111515S-VIDEO DETBA76262IC1001BA7626C-VIDEO DET1512IC1008NJM2509V13435Q1022IC1008IC1007C1Q1012MUTE+5.6V(Y,CB,CR SWITCHING SAME)+5.6VRMC DATAOUTKIC9459AVRRELAY B+-36VFLTM5-MTL601Y/CMIXY/CYCYQ10177805+5V (A/D POWER)FUNCTION,OP AMPTUNERVIDEO POWER+5V (DSP PART PWR)FUNCTION,OP AMPCODEC79157805LOW DROP78057815MAIN -BMAIN +B+MUTE-H/P OUTSW+-+PRE OUT+-SURR BACK/MULTIFL DRIVERu-COMFILAMENT AC7805RELAY6666AVR-1804/884 / AVC-1880AVR-1804/884 / AVC-1880ADJUSTMENTADJUSTMENTTuner Section (AVR-1804/884 only)CONNECTION DIAGRAM OF MEASURING INSTRUMENTS? FMSTEREOMODULATORFM SSGDigitalVoltmeter75ohmT402T403IC402VR402TUNER BDR47120+1410dB? AMT402T403IC402TUNER BDR471VR401FM ALIGNMENTInputOutputAdjustmentStepAlignmentItemTuningFrequencySettingTypeFrequencyInputLevelModulationCouplingTypeConnect toPointsAdjust to1CenterAdjustment98.1MHz(98.0MHz)FM SSG98.1MHz60dBMono1kHz 100%AntennaTerminalDigitalVoltmeterR471T402 50mV2Distortion98.1MHz(98.0MHz)FM SSG98.1MHz60dBMono1kHz 100%AntennaTerminalDistortionMeterOutputTerminal (L)T403MinimumDistortion3Repeat Steps 1 and 24Signal Level98.1MHz(98.0MHz)FM SSG98.1MHz20dBOFFAntennaTerminalLight “TUNED” onFL DisplayVR402AM ALIGNMENTOutputAdjustmentStepAlignmentItemFrequencyInputTypeConnect toPointsAdjust toRemarks1Signal Level999 (1000)kHzAM SSGVR401Light “TUNED” onFL DisplaySSG OUTPUT74dB (EMF)7777AVR-1804/884 / AVC-1880AVR-1804/884 / AVC-1880Audio SectionIdling CurrentRequired measurement equipment : DC Voltmeter調整必要測定器 : 直流電圧計Preparation(1)Avoid direct blow from an air conditioner or an electric fan, and adjust the unit at normal room tempereture15 C 30 C (59 F 86 F).(2)Presetting POWER (Power sourse switch)OFF SPEAKER (Speaker terminal)No load (Do not connect speaker, dummy resistor, etc.)(1)、扇風機風通良場所避、通常使用状態置。周囲温度1530、湿度常湿。Adjustment(1)Remove top cover and set VR101, VR102, VR103, VR104, VR105 on Amp. Unit, VR106 on SURR.-BACK ch Amp.Unit at full counterclockwise ( ) position.(2)Connect DC Voltmeter to test points (FRONT-Lch: TP104, FRONT-Rch: TP105, CENTER ch: TP103,SURROUND-Lch: TP101, SURROUND-Rch: TP102, SURROUND-BACK ch: CP106).(3)Connect power cord to AC Line, and turn power switch ON.(4)Presetting.MASTER VOLUME : - counterclockwise ( min.)MODE: 6CH STEREOFUNCTION: CD(5)Within 2 minutes after the power on, turn VR101 clockwise ( ) to adjust the TEST POINT voltage to 1.5 mV 0.5 mVDC.(6)After 10 minutes from the preset above, turn VR101 to set the voltage to 2.5 mV 0.5 mV DC.(7)Adjust the Variable Resistors of other channels in the same way.(1)上、基板VR101, VR102, VR103, VR104,VR105 及Surr. Back 基板VR106 反時計方向 () 回切状態。(2) (FRONT-Lch: TP104, FRONT-Rch: TP105, CENTER ch: TP103, SURROUND-Lch: TP101,SURROUND-Rch: TP102, SURROUND-BACK ch: CP106) 直流電圧計接続。(3)電源AC100V （95105V 範囲可）接続、電源ON 。(4)後、次。VOLUME（音量調節）反時計方向 () 回、最小状態。SPEAKER-A（端子）無負荷（、抵抗器接続。）MODE : 6CH STEREOFUNCTION : CD(5)2分以内VR101 時計方向 () 回電圧次調整。1.5mV 0.5mV DC(6)予備調整10分後VR101 回、次電圧設定。2.5mV 0.5mV DC(7)同方法各可変抵抗調整。VR104TR104VR105TP105VR106CP106S Back chS RchVR102TP102VR103,TP103C chVR101,TP101F LchS LchF RchDC Voltmeter8888AVR-1804/884 / AVC-1880AVR-1804/884 / AVC-1880SEMICONDUCTORSSEMICONDUCTORSOnly major semiconductors are shown, general semiconductors etc. are omitted to list.主半導体記載。汎用半導体記載省略。? ? ? ? ? ICsCXP740010(IC201)PH7PH6PH5PH4PH3PH2PH1PH0PK7/TO1RSTVSSXTALEXTALPK6/CS0PK5/SI0PK4/SO0PK3/SCK0PF7/AN11PF6/AN10PF5/AN9PC6PC7PA0PA1PA2PA3PA4PA5PA6PA7NCVDDVSSPK1/TXPK2/TEXPI1/RMCPI2/NMIPI3/TO0/ADJPI4/INT1/CS1PI5/SCK1PC5PC4PC3PC2PC1PC0PB7/SI2PB6/SO2PB5/SCK2PB4/TO2PB3PB2PB1PB0PJ7PJ6PJ5PJ4PJ3PJ2PJ1PJ0PD7PD6PD5PD4PD3PD2PD1PD0PI6/SO1PI7/SI1PE0/INT0PE1/INT2PE2/PWM0PE3/PWM1PE4PE5PE6PE7PG0/TxDPG1/RxDPG2/EC0PG3/EC1PG4/EC2PG5/INT3PG6/INT4PG7/CINTAN0AN1AN2AN3PF0/AN4PF1/AN5PF2/AN6PF3/AN7AVDDAVREFAVSSPF4/AN8123456789101112131415161718192031323334353637383940414243444546474849501009998979695949392919089888786858483828121222324252627282930807978777675747372717069686766656463626160595857565554535251TOP VIEWCXP740096 Terminal Function19274 STBOTC9274 CONTROL29274 73 9164 CLKOTC9274/TC9273/TC9164 CONTROL39274 73 9164 DATOTC9274/TC9273/TC9164 CONTROL4FRONT MUTEOFRONT MUTE59273 CEOTC9273 CONTROL6ERR MUTEOERR MUTE7ERR MUTE OFFOERR MUTE OFF889057 AUDIOILC89057 CONTROL989057 EMPHAILC89057 CONTROL10SW SUMOSW SUMMING CONTROL11M32 SDINIDATA INPUT FROM MELODY321289057 SDINIDATA INPUT FROM LC8905713EPROM RESETOEPROM RESET1489057 RESETOLC89057 RESET15M32 CSOMELODY32 CS16M32 SDOUTOMELODY32 CONTROL DATA1789057 CEOLC89057 CE1889057 1837 SDOUTOCONTROL DATA1989057 1837 SCLKOCONTROL CLOCK201837 RESETOCODEC RESET219164 CEOTC9164 CONTROL22SW MUTEOSW MUTE23RELAY SPK BOSURROUND BACK RELAYPinNo.Pin NameFunctionI/O9999AVR-1804/884 / AVC-1880AVR-1804/884 / AVC-1880PinNo.Pin NameFunctionI/O24RELAY SPK AOFRONT A RELAY25RELAY SURROSURROUND RELAY26RELAY CNTOCENTER RELAY27RELAY H/POH/P RELAY28FUNC UPIENCODER INPUT(FUNCTION)29H/P DETECTIH/P DETECT30FUNC DOWNIENCODER INPUT(FUNCTION)31NC-34SURR MUTEOOOSURROUND MUTEKIC9459 CONTROL STBZONE2/SURROUND BACK : SELECTION RELAYFRONT B RELAY359459 STB36MULTI SB RLY37RELAY SPK B38FL DRV RESETOLC75721NE RESET39RELAY POWEROPOWER RELAY40RESETIRESET41GNDI42XTAL43EXTAL44FL DRV CEOLC75721NE CE45FL DRV DATAOLC75721NE DATA46FL DRV/2090 CLKOCONTROL CLOCK472090 DATAOBU2090F DATA48VOL DOWNIENCODER INPUT(VOLUME)49VOL UPIENCODER INPUT(VOLUME)50SEL DOWNIENCODER INPUT(SELECT)51SEL UPIENCODER INPUT(SELECT)52AVSS53VREF54AVDD5589057 INT56GND57STEP OPTIAREA SELECTLC89057 INT58SET OPTIMODEL SELECT59GND60KEY IN3IKEY INPUT61KEY IN2IKEY INPUT62KEY IN1IKEY INPUT639K/10K STEPITUNER STEP SELECT64PROTECTIPROTECTION65C-VIDEO DETIIComposite Signal detect input (H: Signal input)S Signal detect input (H: Signal input)66M32 SCLKOMELODY32 CLOCK671837 CEOCODEC CE68M32 RESETOMELODY32 RESET69S-VIDEO DET70STBY LEDOOOSTANDBY LEDLC74781 CONTROL ENABLELC74781 CONTROL CLOCK71NC72NC7374781 CS7474781 SCLK75SURR BACK MUTEOSURROUND BACK MUTE762090 CLK2OBU2090 CONTROL CLOCK2 (VIDEO)32CNT MUTEOCENTER MUTE33NC10101010AVR-1804/884 / AVC-1880AVR-1804/884 / AVC-1880PinNo.Pin NameFunctionI/O77PWR DOWNIIPOWER DOWN DETECT78RDS CLKOOTDA7330 CONTROL CLOCK79RDS DATAOTDA7330 CONTROL DATAMUTE power ON/OFF switching80MUTE PWR819184 CEOTC9184 CONTROL82M32 INTREQI/OMELODY32 CONTROL83MULTI MUTEOMULTI MUTE84S. MONITOR DETS Monitor connection detect input (L: Connected)85REMOCONI-REMOTE CONTROL SIGNAL INPUT86GND87GND88VSS89VDDVDD BACK UP90NC91TC9482 CEOTC9482 CONTROL92PLL DATAOPLL CONTROL (LC72131), DATA (TC9482, TC9184, KIC9459)PLL CONTROL (LC72131), CLOCK (TC9482, TC9184, KIC9459)PLL CONTROL (LC72131), 93PLL CLKO94PLL DT INO95TU MUTEOTUNER MUTE96STEREOISTEREO DETECT97TUNEDITUNED DETECT98PLL CEOPLL CONTROL992090 CLK 1 VIDEOOBU2090 CONTROL CLOCK1 (VIDEO)100 2090 DATA VIDEOOBU2090 CONTROL DATA (VIDEO), LC74781 CONTROL DATA1234567891011121314151617181920212244434241403938373635343332313029282726252423A15A14A13A12A11CEI/O0I/O1I/O2I/O3VccGNDI/O4I/O5I/O6I/O7WEA10A9A8A7NCA0A1A2OEUBLBI/O15I/O14I/O13I/O12GNDVccI/O11I/O10I/O9I/O8NCA3A4A5A6NCA0-A15CEOEWE64K x 16MEMORY ARRAYDECODERCOLUMN I/OCONTROLCIRCUITGNDVCCI/ODATACIRCUITI/O0-I/O7Lower ByteI/O8-I/O15Upper ByteUBLBCEOEWELBUBPIN DESCRIPTIONPin NameAddress inputsSymbolA0-A15Data Inputs/OutputsI/O0-I/O15Chip Enable InputOutput Enable InputWrite Enable InputLower-byte Control (I/O0-I/O7)Upper-byte Control (I/O8-I/O15)No ConnectionNCPowerVCCGroundGNDIS61LV6416 (IC806)PIN DESCRIPTIONPin NameAddress InputsSymbolA0-A18Data Input/Outputs, Command InputsDQ0-DQ7Data Input/OutputsDQ8-DQ14Data Input/Output or Address InputDQ15A-1Chip EnableOutput EnableWrite EnableReset/Block Temporary UnprotectReady/Busy OutputRBByte/Word OrganizationBYTESupply VoltageVCCGroundVSSNo Connected InternallyNCDont Use as Internally ConnectedDUEGWRPA1A0A2EA3VSSA4GA5DQ0A6DQ8A7DQ1A17DQ9A18DQ2RBDQ10NCDQ3NCDQ11RPVCCWDQ4NCDQ12NCDQ5A8DQ13A9DQ6A10DQ14A11DQ7A12DQ15A-1A13VSSA14BYTEA15A16241312125363748M29W800TM29W800T19A0-A18WDQ0-DQ14M29W800ATE15GRPDQ15A-1BYTERBVCCVssM29W800AT (IC805)11111111AVR-1804/884 / AVC-1880AVR-1804/884 / AVC-1880MELODY32 (IC804)Pin NameMELODY32 Terminal FunctionPinNo.Pin NamePinNo.Pin NamePinNo.Pin NamePinNo.Pin NamePinNo.Pin NamePinNo.1D142D153HAD04HAD15GND6HAD27HAD38HAD49HAD510HAD611HAD712HAD813VDDEXT14HAD915HAD1016GND17HAD1118HAD1219VDDINT20HAD1321HAD1422HAD1523HA1624HACK_P25VDDEXT26HACK27HCMS28HCIOMS29GND30HALE31HRD32HWR33GND34PF035PF136PF237PF338PF439PF540VDDEXT41PF642PF743TMR044TMR145TMR246DT247TCLK248TFS249DR250RCLK251RFS252RXD53TXD54GND55GND56DT057TCLK058VDDINT59TF5060DR061RCLK062RFS063VDDEXT64DT165TCLK166TFS167DR168RCLK169RFS170BMODE071BMODE172BYPASS73RESET74TDO75TDI76TMS77GND78TCK79TRST80GND81EMU82VDDINT83OPMODE84A085A186A287A388A489A590VDDEXT91A692A793A894GND95A996A1097A1198A1299A13100 VDDEXT101 A14102 A15103 A16104 A17105 GND106 A18107 A19108 A20109 A21110 BGH111 BG112 BR113 BMS114 IOMS115 MS0116 MS1117 MS2118 VDDEXT119 MS3120 ACK144110910872733637TOP VIEW121 WR122 RD123 D0124 D1125 D2126 D3127 VDDINT128 D4129 GND130 CLKOUT131 VDDEXT132 CLKIN133 XTAL134 GND135 D5136 D6137 D7138 D8139 D9140 D10141 D11142 D12143 VDDEXT144 D1312121212AVR-1804/884 / AVC-1880AVR-1804/884 / AVC-1880AD1837 (IC808)AD1837 Terminal FunctionDescriptionPin No.Pin NameInput/Output1,39DVDDDigital Power Supply. Connect to digital 5V supply.2CLATCHILatch Input for Control Data33CINISerial Control Input4PD/RSTIPower-Down/Reset5,10,16,24,30,35AGNDAnalog Ground6,12,25,31NCNot connected7,13,26,32OUTLxODACx Left Channel Output8,14,27,33NCNot connected9,15,28,34OUTRxODACx Right Channel Output11,19,29AVDDAnalog Power Supply. Connect to analog 5V supply.17FILTDFilter Capacitor Connection. Recommend 10F/100nF.18FILTRReference Filter Capacitor Connection. Recommended 10F/100nF.20ADCLNIADC Left Channel Negative Input21ADCLPIADC Left Channel Positive Input22ADCRNIADC Right Channel Negative Input23ADCRPIADC Right Channel Positive Input36M/SIADC Master/Slave Select37DLRCLKI/ODAC LR Clock38DBCLKI/ODAC Bit Clock40,52DGNDDigital Ground41-44DSDATAxIDACx Input Data (Left and Right Supply)45ABCLKI/OADC Bit Clock46ALRCLKI/OADC LR Clock47MCLKIMaster Clock Input48ADVDDDigital Output Driver Power Supply49ASDATAOADC Serial Data Output50COUTOOutput for Control Data51CCLKIControl Clock Input for Control Data12345678910111213AGNDAVDDOUTR2NCOUTL2NCOUTR1NCOUTL1NCPD/RSTCINCLATCHDVDDNCOUTL3NCOUTR3NCOUTL4NCOUTR4AGNDDLRCLKDBCLKDGND141516171819202122232425262728293031323334353637383952515049484746454443424140FILTDFILTRAGNDM/SAGNDAVDDADCLNADCLPADCRNADCRPAGNDAGNDDGNDCCLKCOUTASDATAODVDDMCLKALRCLKABCLKDSDATA4DSDATA3DSDATA2DSDATA1DVDDAVDDTOP VIEWOUTL1CONTROL PORTCLOCKFILTDFILTRADCLPADCLNADCRPADCRNDLRCLKDBCLKDSDATA1DSDATA2DSDATA3DSDATA4MCLKASDATAABCLKALRCLKODVDDDVDDDVDDDGND AGND AGND AGND AGNDDGNDCINCLATCHCCLKCOUTDIGITALFILTERPD/RST M/S AVDD AVDDVOLUMEOUTR1OUTL2OUTR2OUTL3OUTR3OUTL4OUTR4AD1837DIGITALFILTER