SERVICE MANUAL - Nexo

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NXAMP4x4KJIHGFEDCBA■ BLOCK DIAGRAM 3/5 1PAANHOUTANH+15V23ANALOG AUDIOINPUTs[+6.8dBu]MAXANA_OUTxFBxAGNDxCLIP_PAxRELAY_PAxTEMP_PAxTotal Gain: +37dBNegativeFeedbackLoopNetwork+5ATemperaturesensorDifferential Amplifier StageClipDetectorVoltage Amplifier StageProtectionRelay+5AAGNDASOLimitterEEEngineVoltage LimitterPower Amplifier StageCurrentSensingVoltage LimitterEEEnginePower Out[+43.8dBu]MaxPOUTxPOUT1POUT2Anti-OscillationNetworkAnti-OscillationNetwork+15VCurrentSensor-15V+15VCurrentSensor-15VVoltageSensor-15V+15VVoltageSensor-15V1+1- 2-2+1+1- 2-2++24A_AAGNDAGND4POUT3Anti-OscillationNetwork+15VCurrentSensor-15V+15VVoltageSensor-15V+24A_AAGND1+1- 2-+24A_A+24A_B+15A-15AAGNDPGND_A1PGND_A2PGND_B1PGND_B22+5+15VCurrentSensor+15VVoltageSensor-15V1+1- 2-2+POUT4Anti-OscillationNetwork-15V+24A_BAGND6+24A_BAGND7828CA1-2001022110-306
HGFEDCBANXAMP4x4■ BLOCK DIAGRAM 4/5 +3.3D+3.3D+5A-15A+15ARELAY_OUT[1:4]+3.3DLVC541LCD_ENABLE/SW1_CS+3.3DLCD_ENABLE/ES_CS/ETH_CS/DSP1_CS/DSP3_CS/SW1_CS/SW2_SC/UI_CS/GPI_CS/GPO_CS/CSIO[0:5]CSIO[6,7]/UI_CSUI_DATA[7:0]/GPO_CSGPO[0:7]/GPI_CSGPI[0:4],ES_GPI[1:3]Serial Flash ROM16Mbit+3.3DCPUUPSD335440MHzSCLSDATEMP_PA[1:4]MAINS_[A,B]/PSW_DETECTRS232_TX,RXES_TX,RXLV4052+3.3D+1.25D +3.3D/DSP1_CS/RESET_DSP1SPI_I/FSCLKLRCK+1.25D +3.3D/DSP3_CS/RESET_DSP3SPI_I/FSCLKLRCKDSPADSP56371DSPADSP56371CODEC0_DIGI_OUTCODEC1_DIGI_OUTCODEC0_DIGI_INES_I2S_DATA0ES_I2S_DATA1SENSE_U12_DIGI_OUTSENSE_I12_DIGI_OUTCODEC0_DIGI_OUTCODEC1_DIGI_OUTCODEC1_DIGI_INES_I2S_DATA0ES_I2S_DATA1SENSE_U34_DIGI_OUTSENSE_I34_DIGI_OUTSENSE_U12_DIGI_OUT/RESET_SENSEMCLK,SCLK,LRCKSENSE_U34_DIGI_OUT/RESET_SENSEMCLK,SCLK,LRCKSENSE_I12_DIGI_OUT/RESET_SENSEMCLK,SCLK,LRCKSENSE_I34_DIGI_OUT/RESET_SENSEMCLK,SCLK,LRCKSCLSDACODEC0_DIGI_OUTMCLK,SCLK,LRCK/RESET_ADCDACCODEC0_DIGI_INCODEC1_DIGI_OUT/RESET_ADCDACMCLK,SCLK,LRCKCODEC1_DIGI_INSCLSDA+3.3DA/D 2chPCM1803AA/D 2chPCM1803AA/D 2chPCM1803AA/D 2chPCM1803A+3.3D +9A/MUTE_VOLUME+3.3D +5A+15A/RESET_VOLUMECODEC 2ch/2chCS4272+5ACODEC 2ch/2chCS4272SCLSDAAnalog Volume8chCS3318SENSE_U1SENSE_U2SENSE_U3SENSE_U4SENSE_I1SENSE_I2SENSE_I3SENSE_I4ANA_IN1ANA_IN2ANA_IN3ANA_IN4ANA_OUT1ANA_OUT2ANA_OUT3ANA_OUT4See page 6See page 4See page 6OUTANHINANH123KEY x 10+5DHCT4514x4+5DHCT273x2LEDx79SW[1,2]CSIO[6,7]/CSIO[4,5]/SW2_CSTEMP_PS_A[1,2],TEMP_PS_B[1,2],/CSIO[0]/RESET_DSP1,3/RESET_ADCDAC,/RESET_SENSE,/RESET_VOLUME/CSIO[1]RELAY_PS_A[1:2],RELAY_PS_B[1:2],SHUTDOWN_PS_A,SHUTDOWN_PS_B,/CSIO[2]RELAY_OUT[1:4]RELAY_PA[1:4]MCLKSCLKLRCKCLOCK BLOCKSOURCE_SELINT_MCLK,INT_SCLK,INT_LRCKLVC15724.576MHz-15A-9ATEMP_PA[1:4],CLIP_PA[1:4]RELAY_PA[1:4]ES_I2S_DATA[1:0]ES_MCLK,ES_SCLK,ES_LRCK/ES_CS/ETH_CSSPI_I/FES_GPI[1:3]ES_TX,RXSOURCE_SEL/RESET+5D+3.3DOPT-ANPAANHOPTION SLOTEtherSound4ENCODERx1ENC/CSIO[3]/MUTE_VOLUMESOURCE_SELFAN_CONTROL[1:2]RS232_TX,RX+5DTXRXRS232+15A +9A+3.3D+1.25DGPO[0:7]GPO_[0:7]A+9V reg+1.25V regPN-AN-15A -9A-9V reg+5A+5DGPI[0:4]CONTROLGPIRS232-GPI5See page 5PSANHASee page 5PSANHB28CA1-2001022110-407
Page 1 and 2:
SERVICE MANUAL■ CONTENTS PANEL LA
Page 3 and 4:
NXAMP4x4■ PANEL LAYOUT • Front
Page 5 and 6:
NXAMP4x4■ SERVICE PRECAUTIONS Saf
Page 7 and 8:
NXAMP4x4■ OVERALL ASSEMBLY WIRING
Page 9 and 10:
NXAMP4x43. Wiring of the FANConnect
Page 11 and 12:
NXAMP4x4d, e) Fix the wires to the
Page 13 and 14:
NXAMP4x4CN401YELLOW Fig. 20 NOTE:
Page 15 and 16:
NXAMP4x4b-3) Then fasten these wire
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NXAMP4x4At the stage as shown in Fi
Page 19 and 20:
NXAMP4x4o) Fasten the wires (WK0208
Page 21 and 22:
NXAMP4x48. Color of the connectors
Page 23 and 24:
NXAMP4x412. Confirmation of Switch
Page 25 and 26:
NXAMP4x4■ DISASSEMBLY PROCEDURES
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NXAMP4x43. PSANHA Circuit Board(Tim
Page 29 and 30:
NXAMP4x45. PSANHB Circuit Board(Tim
Page 31 and 32:
NXAMP4x48. Upper left (CH1) PA unit
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NXAMP4x412. Front Panel Assembly(Ti
Page 35 and 36:
NXAMP4x416. Lower left DC Fan(Time
Page 37 and 38:
■ LSI PIN DESCRIPTION NXAMP4x4
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NXAMP4x4CS4272-CZZR (X8487A0)CODECC
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NXAMP4x4NJU7630-M (X8682A0)Regulato
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NXAMP4x4SN74LVC157APWR (X6786A0)Dat
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NXAMP4x4• INANH Circuit Boardto C
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NXAMP4x4• CONTROL Circuit BoardAA
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NXAMP4x4• CONTROL Circuit BoardBP
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NXAMP4x4• OUTANH Circuit BoardPat
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NXAMP4x4• PN-AN Circuit BoardAEnc
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NXAMP4x4• PN-AN Circuit BoardBPat
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NXAMP4x4• PAANH Circuit BoardAA't
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NXAMP4x4• PSANHA, PSANHB Circuit
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NXAMP4x4• PSANHA, PSANHB Circuit
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NXAMP4x4• NX-DFLT Circuit BoardEx
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NXAMP4x43. Operation3-1. Entry of t
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NXAMP4x4Switch the GPI jig to the G
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NXAMP4x44-15. ANALOG testPress the
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NXAMP4x4■ 71
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NXAMP4x4 73
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NXAMP4x4 7
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NXAMP4x4
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NXAMP4x41-5. Other0 dBu is defined
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NXAMP4x44-7. Channel separation1) G
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NXAMP4x4■
Page 85 and 86: NXAMP4x4
Page 87 and 88: NXAMP4x4
Page 89 and 90: NXAMP4x45) Click the [Create] butto
Page 91 and 92: NXAMP4x4 91
Page 93 and 94: NXAMP4x4■ OVERALL ASSEMBLY 1/2 8
Page 95 and 96: NXAMP4x4■ OVERALL ASSEMBLY 2/2 2
Page 97 and 98: NXAMP4x4REF NO. PART NO. DESCRIPTIO
Page 101 and 102: NXAMP4x4■ LOCATIONS OF HEAT SINK
Page 103 and 104: NXAMP4x4■ HEAT SINK UNIT L100 PS
Page 105 and 106: NXAMP4x4■ HEAT SINK UNIT L60 PSA
Page 107 and 108: NXAMP4x4■ HEAT SINK UNIT L50 PSA
Page 109 and 110: NXAMP4x4■ HEAT SINK UNIT MP-5 PA
Page 111 and 112: NXAMP4x4■ ELECTRICAL PARTS REF NO
Page 115 and 116: NXAMP4x4CONTROLREF NO. PART NO. DES
Page 123 and 124: NXAMP4x4PAANHREF NO. PART NO. DESCR
Page 131 and 132: NXAMP4x4CIRCUIT DIAGRAM■ CONTENTS
Page 133 and 134: KJIHGFEDCBANXAMP4x4■ WIRING DIAGR
Page 135: HGFEDCBANXAMP4x4■ BLOCK DIAGRAM 2
Page 139 and 140: QPONMLKJIHGFEDCBANXAMP4x4■ CIRCUI
Page 145 and 146: HGFEDCBANXAMP4x4■ CIRCUIT DIAGRAM
Page 149 and 150: LKJIHGFEDCBANXAMP4x4■ CIRCUIT DIA
Page 151 and 152: LKJIHGFEDCBANXAMP4x4■ CIRCUIT DIA
Page 153: QPONMLKJIHGFEDCBANXAMP4x4■ CIRCUI
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SERVICE MANUAL - Nexo

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