Arcam-AVR200-avr-sm维修电路原理图.pdf

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1、AVR200DiVA AVR200 Surround Sound ReceiverService Manual ARCAMIssue 1.0RadioFans.CN 收音机爱 好者资料库SERVICE MANUALA A AV V VR R R2 2 20 0 00 0 0SURROUND SOUND RECEIVERCONTENTSPageSPECIFICATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-3DISASSEM

2、BLY INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4WIRING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3、. . . . . . . . . . . . . . . . . . . .6ADJUSTMENT POINTS DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7INSTRUMENT SETUP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8ALIGNMENT PROCEDURES . . . . . . . .

4、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-9IMPORTANT NOTES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9PCB LAYOUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5、 . . .10-20SCHEMATIC DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21-40IC BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41-49ELECTRICAL PARTS LIST . . . . . . . . . . . . . . . . . . . .

6、. . . . . . . . . . . . . . . . . . . . . . .40-67RadioFans.CN 收音机爱 好者资料库SURROUND SOUND RECEIVERA A AV V VR R R2 2 20 0 00 0 0 - 2 -POWER AMPLIFIER AND PREAMPLIFIER SECTIONRated distortion(THD 20Hz-20 kHz FL/C/FR) 0.08%(THD 20Hz-20 kHz SL/SR) 0.3%Input Sensitivity(ref. 8 ohms, 1 kHz)180+/-30 mVS/N R

7、atio(A-wtd, 1KHz, 1W, 8 ohm) -75 dB(A-wtd, 1KHz, 80W, 8 ohm)FL/FR/C 92 dBSL/SR -90 dBFrequency Response(20 Hz - 20 kHz)0 0.8 dBChannel Balance(1 dB to -40 dB, 1 kHz) 2 dB(-41 dB to -50 dB, 1 kHz) 3 dBAudio muting at 1kHz 53 dBHeadphone O/P in 0.1%, 600 ohm load, CD in 500mV, 1 kHz 10VSubwoofer out,

8、500mV in(THD at 2V O/P, 100 Hz) 0.5%(S/N at 2V O/P, 100 Hz) 80 dBCrosstalk(2V input, 10W, 1 kHz) -68 dBContinuous average power output (L/R/C RL/RR 8ohms)80 WControlsBass(at 500mV in, 1W out, 100 Hz) 9 dBTreble(at 500mV in, 1W out, 10 kHz) 9 dBSURROUND SECTIONChannel separationI/p mode : L, R: 1V in

9、, 1 kHz, Ch R, L 45 dB: o/p at unexpected, 1 kHz, Ch C 35 dBI/p mode : L= -R: 1V in, 1 kHz, Ch R, L 28 dB: o/p at unexpected, 1 kHz, Ch C 30 dBI/p mode : L= R: 1V in, 1 kHz, Ch R, L 45 dB: o/p at unexpected, 1 kHz, Ch SL, SR 30 dBFrequency ResponseI/p mode : L, R: 1V in, 1W, Ch R, L40Hz0 1.5 dB20kHz

10、0 0.8 dBI/p mode : L= R: 1V in, 1W, Ch C300Hz0 0.8 dB20kHz0 0.8 dBI/p mode : L= -R: 1V in, 1W, Ch SL, SR30Hz0 1.0 dB6.5kHz-3 1.0 dBS/N Ratio ( 200mV in, 1, A-WTD w/ 1k termination)I/p mode : L, R: 1 kHz, Ch L, R 65 dBI/p mode : L=R: 1 kHz, Ch C 65 dBI/p mode : L=-R: 1 kHz, Ch SL, SR 65 dBTHD (2.2V i

11、n, 1W, w/ 80 kHz LPF, 1 kHz) 0.2%AC-3/DTS SECTIONFrequency ResponseFL, FR, C, SL, SR:200Hz0 0.8 dB20kHz0 0.8 dBDistortion 1W all channels0.08%S/N 1 W ( CCIR/ARM, 200 Hz NOTCH & 400 Hz HPF) 85 dBPROLOGIC II AUDIOCenter Width Control (Use track 2 from PLII Audio Test CD ver1.0)SPECIFICATIONStepL/RC0-3

12、1dB0.0dB1-12dB-0.6dB2-9.6dB-1.1dB3-7.6dB-1.8dB4-4.8dB-4.6dBStepL/RC5-4.1dB-6.6dB6-3.6dB-9.0dB7-3.0dB-31dBSURROUND SOUND RECEIVERA A AV V VR R R2 2 20 0 00 0 0 - 3 -Dimension Control (Use track 1 and 3 from PLII Audio Test CD ver1.0)AM TUNER SECTIONInput level is expressed as the reading in open-circ

13、uitof 75-ohm source impedance signal generatorUsable sensitivity (999/1000kHz) 30 dBS/N Ratio (5mV in) 38 dBTHD (5mV in) 3%IF Rejection (450 kHz) 36 dBImage Rejection (F+2xIF) 28 dBSelectivity 17 dBOutput130+/- 20mVLoop sensitivity (20dB S/N)999/1000 kHz 66 dB603/600 kHz 66 dB1404/1400 kHz 66 dBFreq

14、uency response (100 - 2.3 kHz, 5mV) 6 dBFM TUNER SECTION*C*AHInput level is expressed as the reading in open-circuitof 75-ohm source impedance signal generatorUsable Sensitivity ( 98 MHz) 15 dB 15 dBSignal / Noise RatioMono 72 dB 72 dB(60 dB, IHF wtd)Stereo 66 dB 66 dBFrequency Response (20 Hz - 15

15、kHz, 60 dB)0 1.5 dB0 1.5 dBChannel Separation (60 dB)100 Hz 30 dB 30dB1 kHz 38 dB 38 dB10 kHz 30 dB 30 dBAlternate Channel Selectivity(40 dB, 400 kHz) 60 dB 45 dBCapture Ratio (40 dB) 3 dB 3 dBAM Suppression(60 dB, 100% Mod.FM, 30% Mod.AM) 48 dB 48 dBImage Rejection (119.4 MHz) 85 db 40 dBI.F. Rejec

16、tion ( 10.7 MHz) 78 dB 65 dBPilot Suppression (60 dB) 60 dB 60 dBTHD (60 dB, L=R 75 kHz for AH, 40 kHz Dev for C)Mono 0.25% 0.25%Stereo 0.35% 0.35%Auto-Search SensitivityOn 24 dB 24 dBOff 15 dB 15 dBRDS decode Sensitivity 26 dB 26 dBPHYSICAL SPECIFICATIONSDimensions (Width x Height x Depth)422 x 132

17、 x 290mmNet weight14kg (31 lbs)Shipping weight16.7kg (37 lbs)StepCSLSR-3-31dB-7.8dB-31dB-2-31dB-11.5dB-31dB-1-31dB-19.5dB-31dB0-30dB-31dB-31dBStepCSLSR1-20.4dB-31dB-31dB2-14.0dB-31dB-31dB3-11.5dB-31dB-31dBSURROUND SOUND RECEIVERA A AV V VR R R2 2 20 0 00 0 0 - 4 -DISASSEMBLY INSTRUCTIONS1. Remove ma

18、chine screws M 4.0 x 6.0 ( 1 to 6 ) from the side panels.Remove tapping screw 3.0 x 8.5 ( 7 )from the back panel.Refer to Figure No.1.Figure No.12. Pull both sides of the TOP COVER slightly outwards 8 and tilt approx. 35 and then removein the direction as indicated by the arrow 9 . Refer to Figure N

19、o.2.Figure No.2.7651324988SURROUND SOUND RECEIVERA A AV V VR R R2 2 20 0 00 0 0 - 5 -WIRING DIAGRAMSURROUND SOUND RECEIVERA A AV V VR R R2 2 20 0 00 0 0 - 6 -COAX AL x3OPT CAL x2405374LS157M624476FPCom-VideoTrigger NPOWER DOWNDetect Pin.For SPK off,Mute ON, VFD off.BLOCK DIAGRAMSURROUND SOUND RECEIV

20、ERA A AV V VR R R2 2 20 0 00 0 0 - 7 -OSCRFADJUSTMENT POINTS DIAGRAM1. TUNER2. IDLE CURRENT - Front Amplifier & Surround Amplifier BoardSURROUND SOUND RECEIVERA A AV V VR R R2 2 20 0 00 0 0 - 8 -INSTRUMENT SETUP1. FM MEASUREMENTFig. 1Fig. 22. RDS MEASUREMENTFig. 33. AM MEASUREMENTFig. 4FMSIGNALGENER

21、ATORANTENNATERMINALOUTPUTTERMINALDISTORTIONANALYZERDISTORTIONANALYZERACVOLTMETEROSCILLOSCOPEACVOLTMETEROROSCILLOSCOPEACVOLTMETEROROSCILLOSCOPEOUTPUTTERMINALOUTPUTTERMINALLRANTENNATERMINALANTENNATERMINALANTENNATERMINALAM LOOPANTENNA(Accessory)AM LOOPANTENNA60cmDIGITALMILLIVOLTMETERVT-J914FMSIGNALGENE

22、RATORAMSIGNALGENERATORFMSIGNALGENERATORRDSGENERATORFMSTEREOGENERATORP-901DCMILLIVOLTMETERUNITUNITUNITUNITALIGNMENT PROCEDURESAMPLIFIER SECTIONIdle CurrentStepItemConnectionAdjustmentAdjust for1Front Left ChannelVoltmeter to P502 on Front Amp BoardR5742mV0.2mV2Front Right ChannelVoltmeter to P501 on

23、Front Amp BoardR5732mV0.2mV3Center ChannelVoltmeter to P503 on Front Amp BoardR5992mV0.2mV4Rear Left ChannelVoltmeter to JP801 on Surround Amplifier BoardR8672mV0.2mV(PCB N0901C-AMP2)5Rear Right ChannelVoltmeter to JP802 on Surround Amplifier BoardR8682mV0.2mV(PCB N091C-AMP2)SURROUND SOUND RECEIVERA

24、 A AV V VR R R2 2 20 0 00 0 0 - 9 -FM/RDS SECTION- FM mono:1kHz, 75kHz devi., 60dB/V- FM stereo:1kHz, 67.5kHz devi., 60dB/VPilot signal 19kHz 7.5kHz devi.OUTPUTS- Connect the non-inductive type resistor of 8 ohms to the all speaker terminals unless otherwise noted.ItemFMIF/RFStereoDistortionStereoSe

25、parationMutingLevelSignaloutputStep1DC voltmeterL9410100mV3DistortionanalyzerDistortionanalyzerOscilloscopeOscilloscopeL942R956R941MinimumMinimum2AC voltmeterIFT on thefront endIFT on thefront endMaximumMaximumseparationConnectionof instrumentFig.1Fig.2Fig.2Fig.1Channel Lor R 1kHz99.0MHz1kHz 75kHz d

26、evi.65dBf (60dB)99.0MHz Ext.mod. 65dBf(60dB)FM SGoutputStereo mod-ulator outputTuningfrequency99.0MHz99.0MHzChannel Lor R 1kHz99.0MHz Ext.mod. 65dBf(60dB)99.0MHz Ext. mod.65dBf(60dB)RDS 2% MOD99.0MHz 18dB99.0MHz99.0MHzRDSFig.399.0MHzOutputindicatorAdjustmentpointAdjustforRemarksFM MUTE/MODEswitch: O

27、N/AUTORepeat the steps1 to 3 until no fur-ther adjustment isnecessary.FM MUTE/MODEswitch: ON/AUTODont turn morethan +/-180Repeat stereodistortion andstereo separationalignment untilTHD at minimumand separation atmaximum.Decode the RDS-Program Station.AM SECTIONAM Modulation:400Hz, 30%Step123522kHzor

28、531kHz603kHz999kHz600kHz400Hz 30% mod.60dB/mAM SGoutputTuningfrequencyOutputindicatorAdjustmentpoint600kHz400Hz 30% mod.60dB/mACvoltmeterACvoltmeterDigitalDCvoltmeterL972OSC coilon RFblock L971RF coilon RFblock L971Adjustfor1.30.2V (522kHz)1.350.2V (531kHz)MaximumMaximumIMPORTANT NOTES1. Show the so

29、ftware versionPress “DISPLAY”, “5.1 INPUT” and “VIDEO 4”.2. Toggle between PAL and NTSCPress “MEMORY” and “VIDEO 1”.3. Light up all the icon on the VFL.Press “DISPLAY”, “5.1 INPUT” and “VIDEO 1”.4. Clear all tuner presetsPress “5.1 INPUT” and “VIDEO 1”.SURROUND SOUND RECEIVERA A AV V VR R R2 2 20 0

30、00 0 0 - 10 -PCB LAYOUTAUDIO BOARDCOMPONENT VIDEO BOARDSURROUND SOUND RECEIVERA A AV V VR R R2 2 20 0 00 0 0 - 11 -AC-3 BOARD - Component SideSURROUND SOUND RECEIVERA A AV V VR R R2 2 20 0 00 0 0 - 12 -AC-3 BOARD - Solder SideSURROUND SOUND RECEIVERA A AV V VR R R2 2 20 0 00 0 0 - 13 -AMP1 BOARDSURR

31、OUND SOUND RECEIVERA A AV V VR R R2 2 20 0 00 0 0 - 14 -AMP2 BOARDSPEAKER BOARDSURROUND SOUND RECEIVERA A AV V VR R R2 2 20 0 00 0 0 - 15 -KEY BOARD - Component SideKEY BOARD - Solder SideSURROUND SOUND RECEIVERA A AV V VR R R2 2 20 0 00 0 0 - 16 -MAIN BOARDSURROUND SOUND RECEIVERA A AV V VR R R2 2

32、20 0 00 0 0 - 17 -MULTI CHANNEL BOARDSURROUND SOUND RECEIVERA A AV V VR R R2 2 20 0 00 0 0 - 18 -TUNER BOARDSURROUND SOUND RECEIVERA A AV V VR R R2 2 20 0 00 0 0 - 19 -S-VIDEO BOARDPSU BOARDSECONDARY BOARDSURROUND SOUND RECEIVERA A AV V VR R R2 2 20 0 00 0 0 - 20 -GSW BOARDLED BOARDPHONE BOARDPOWER

33、BOARDVOLUME BOARDSWITCH BOARDTONE BOARDSURROUND SOUND RECEIVERA A AV V VR R R2 2 20 0 00 0 0 - 22 - 21 -SCHEMATIC DIAGRAMAC-3 / DTSNOTE: 1. RESISTORS, ARE CARBON FILM 5% 1/10WUNLESS OTHERWISE SPECIFIED.2. CERAMIC CAPACITORS, ARE 50V 10%.UNLESS OTHERWISE SPECIFIED.SURROUND SOUND RECEIVERA A AV V VR R

34、 R2 2 20 0 00 0 0 - 23 - 24 -AMP1NOTE: 1. RESISTORS ARE CARBON FILM 5%1/8W UNLESSOTHERWISE SPECIFIED.MF - METAL FILM2. CERAMIC CAPACITORS ARE 50V 10%. UNLESSOTHERWISE SPECIFIED.SURROUND SOUND RECEIVERA A AV V VR R R2 2 20 0 00 0 0 - 26 - 25 -AMP2NOTE: 1. RESISTORS ARE CARBON FILM 5%1/8W UNLESSOTHERW

35、ISE SPECIFIED.MF - METAL FILM2. CERAMIC CAPACITORS ARE 50V 10%. UNLESSOTHERWISE SPECIFIED.SURROUND SOUND RECEIVERA A AV V VR R R2 2 20 0 00 0 0 - 27 - 28 -KEYNOTE: 1. RESISTORS, ARE CARBON FILM 5% 1/8WUNLESS OTHERWISE SPECIFIED.2. CERAMIC CAPACITORS, ARE 50V 10%.UNLESS OTHERWISE SPECIFIED.SURROUND S

36、OUND RECEIVERA A AV V VR R R2 2 20 0 00 0 0 - 30 - 29 -MULTI CHANNELNOTE: 1. RESISTORS, ARE CARBON FILM 5% 1/8W UNLESSOTHERWISE SPECIFIED.2. CERAMIC CAPACITORS, ARE 50V 10%. UNLESSOTHERWISE SPECIFIED.SURROUND SOUND RECEIVERA A AV V VR R R2 2 20 0 00 0 0 - 31 - 32 -S-VIDEONOTE: 1. RESISTORS ARE CARBO

37、N FILM 5%1/8WUNLESS OTHERWISE SPECIFIED.2. CERAMIC CAPACITORS ARE 50V 10%. UNLESSOTHERWISE SPECIFIED.SURROUND SOUND RECEIVERA A AV V VR R R2 2 20 0 00 0 0 - 34 - 33 -MAINNOTE: 1. RESISTORS, ARE CARBON FILM 5% 1/8W UNLESSOTHERWISE SPECIFIED.MF-METAL FILM2. CERAMIC CAPACITORS, ARE 50V 10%. UNLESSOTHER

38、WISE SPECIFIED.SURROUND SOUND RECEIVERA A AV V VR R R2 2 20 0 00 0 0 - 35 - 36 -TUNERNOTE: 1. RESISTORS, ARE CARBON FILM 5% 1/8W UNLESS OTHERWISE SPECIFIED.2. CERAMIC CAPACITORS, ARE 50V 10%. UNLESS OTHERWISE SPECIFIED.SURROUND SOUND RECEIVERA A AV V VR R R2 2 20 0 00 0 0 - 37 -AUDIONOTE: 1. RESISTO

39、RS, ARE CARBON FILM 5% 1/8W UNLESS OTHERWISE SPECIFIED.2. CERAMIC CAPACITORS, ARE 50V 10%. UNLESS OTHERWISE SPECIFIED.SURROUND SOUND RECEIVERA A AV V VR R R2 2 20 0 00 0 0 - 38 -COMPONENT VIDEONOTE: 1. RESISTORS ARE CARBON FILM 5% 1/8W UNLESS OTHERWISE SPECIFIED.2. CERAMIC CAPACITORS ARE 50V 10%. UN

40、LESS OTHERWISE SPECIFIED.SURROUND SOUND RECEIVERA A AV V VR R R2 2 20 0 00 0 0 - 39 -REMSURROUND SOUND RECEIVERA A AV V VR R R2 2 20 0 00 0 0 - 40 -PSUNOTE: 1. RESISTORS ARE CARBON FILM 5% 1/8W UNLESS OTHERWISE SPECIFIED.MF - METAL FILM2. CERAMIC CAPACITORS ARE 50V 10%. UNLESS OTHERWISE SPECIFIED.3.

41、 COMPONENTS MARKED “” ARE SAFETY CRITICAL PARTS.SURROUND SOUND RECEIVERA A AV V VR R R2 2 20 0 00 0 0 - 41 -IC BLOCK DIAGRAMAC3 BOARDU101: 74HC1511D32D23D14D05Y6W7ST16 VCC15 D414 D513 D612 D711 A10 B8GND9C1211109S713S614S515S41S32S23S141213141512347ST6W5YS0S7S7AS6S6S5S5S4S4S3S3S2S2S1S1S0S0BCAC3 BOAR

42、DU102: 74HC15741Y72Y93Y124Y151G134B103B62B52A31B21A113A144AA/B1A/BVCC1621AG1531B4A1441Y4B1352A4Y1262B3A1172Y3B108GND3Y9AC3 BOARDU104, U109, U116,U129, U134: NE5532 AMPLIFIER 1OUTPUTINVERTINGINPUTNON-INVERTINGINPUTV AMPLIFIER 2V +OUTPUTINVERTINGINPUTNON-INVERTINGINPUT12348765+ + SURROUND SOUND RECEIV

43、ERA A AV V VR R R2 2 20 0 00 0 0 - 42 -AC3 BOARDU103: CS5331AAINL8+-+-+-5674231AINRAGNDS/HComparatorMCLKSCLKLRCKSDATAComparatorVoltage ReferenceSerial Output InterfaceDigitalDecimationFilterDigitalDecimationFilterHighPassFilterHighPassFilterS/HVA+-LP FilterDACDACLP FilterAC3 BOARDU105: CS492627368 1

44、1,14 17185419762021373844434241403932829252622303132333435213 24112 23Parallel or Serial Host Interface24 BitDSP ProcessingFramerShifterInputBufferControllerCompressedData InputInterfaceCMPDAT,SDATAN2CMPCLK,SCLKN2CMPREQ,LRCLKN2SCLKN1,STCCLK2LRCLKN1SDATAN1CLK1NCLKSELFILT2FILT1VAAGNDDGND1 3VD1 3XMT958

45、AUDATA2AUDATA1AUDATA0LRCLKSCLKMCLKDCDDEXTMEM,GPIO8ABOOT,INTREQA1,SCDINA0,SCCLKSCDIO,SCDOUT,PSEL,GPIO9WR,DS,EMWR,GPIO10RD,R/W,EMOE,GPIO11CSDATA7 0,EMAD7 0,GPIO7 0RESETDigitalAudioInputInterfacePLLClock ManagerRAM InputBufferRAMProgramMemoryRAMProgramMemoryRAMOutputBufferOutputFormatterRAMProgramMemor

46、yRAMProgramMemorySTCAC3 BOARDU106, U107: 74HC574D7DQCPFF8Q7D6DQCPFF7Q6D1D2 to D5DQCPFF2Q1D0CPOEDQCPFF1Q0SURROUND SOUND RECEIVERA A AV V VR R R2 2 20 0 00 0 0 - 43 -AC3 BOARDU108: AT27C040VCCDATA OUTPUTSO0 - O7OE, CE ANDPROGRAM LOGICY DECODERX DECODEROUTPUTBUFFERSY-GATINGIDENTIFICATIONCELL MATRIXGNDV

47、PPOECEA0 - A18ADDRESSINPUTAC3 BOARDU110: CS8414RXPRS422ReceiverClock & DataRecoveryDe MuxAudioSerialPortRegistersMuxMuxVD+ DGNDVA+VA+FILTAGNDMCKM3M3 M2 M1 M0SDATASCKFSYNCCUVERFCS12/FCKSELC0/E0 Ca/E1 Cb/E2 Cc/F0 Cd/F1 Ce/F2REFCBLRXN91013166543227251528141111226232418171921202287AC3 BOARDU111-U113: CS

48、4340RSTLRCKSDATADIF0DIF1MCLKMUTECDEM0De emphasisExternalMute ControlInterpolationFilterDACAnalog FilterInterpolationFilterDACAnalog FilterSCLK/DEM1AOUTRAOUTLSURROUND SOUND RECEIVERA A AV V VR R R2 2 20 0 00 0 0 - 44 -AC3 BOARDU114: 74HCU0411A14VAC21Y136A32A126Y42Y115A53A105Y63Y94A7GND84YAC3 BOARDU11

49、8, U119: 74HC00DIGITAL BOARDU762: 74HC00A1B1Y1A2B2Y2GNDVCCB4A4Y4B3A3Y31234567141312111098AUDIO BOARDU301: TC9273N2S11VSS26VDD27 S13S226 S24S325 S35S424 S46S523 S57S622 S68S721 S79S820 S810S919 S911S1018 S1012S1113GND14CK15DATA16STB17 S11(L ch)10bitLatchCircuitLEVEL SHIFT + SHIFT RESISTERCIRCUIT(R ch

50、)10bitLatchCircuit(Sameas L chCircuit)AC3 BOARDU123, U125, U130-U132: 7805POWER AMP BOARD:Q565C: 7812OUTINGNDAC3 BOARDU115, U117, U120: 74HC74SDRDDQ1QGND1QQFF1CP1SD1D1CP1RD1101211131432475698SDRDDQ2Q2QQFF2CP2SD2DVCC2CP2RDSURROUND SOUND RECEIVERA A AV V VR R R2 2 20 0 00 0 0 - 45 -KEY BOARDU201: LC87