SERVICE MANUAL - Nexo

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NXAMP4x4MX25L1605AM2C-12G (X8718A0) (X8718B0)Flash MemoryCONTROL: IC039(X6770A0)SHUNT RegulatorPAANH: IC401PSANH: IC204CS#SO1287VCCHOLD#CATHODWP#36SCLKREFERENCEGND4 5 SIAddressGeneratorX-DecoderMemory ArrayPage BufferSIDataRegisterY-DecoderREFERENCE (R)ANODECS#SRAMBufferMode StateLogic MachineHVGeneratorSenseAmplifireOutputBufferANODE(A)CATHODE(K)SOSCLKClock GeneratorNJM2068M-D (X3505A0)Operational AmplifierCONTROL: IC002-005, 008-011, 018-021, 028-034INANH: IC701, 702OUTANH: IC801, 802+DC VoltageSupplyOutput A 1+V 8Inverting27 Output BInput ANon-Inverting36Input A+ --DC Voltage Supply 4 -V5+ -InvertingInput BNon-InvertingInput BNJM79M09DL1A (X5366A0)RegulatorCONTROL: IC007D1Q2Q1Q7D2Q6R5R6R7R2R3Q5R4Q8R1Q4R8Q9R9Q3Q12R10Q17Q10Q15R11Q14Q19R12Q11C1Q13Q16Q18Q23C2Q24R22R20C3R21Q25Q20R13R14R15D3R17R16R23R24Q21R19Q22R18COMMONOUTPUTINPUT(XR532A0)Operational AmplifierCONTROL: IC047, 048, 050, 052(XD853A0)Regulator +15VPSANH: IC202, 203(XZ940A0)RegulatorCONTROL: IC006INPUTOutput A 1+VInverting2Input ANon-Inverting3Input A+ -Ground 4 - V+ -8765+DC VoltageSupplyOutput BInvertingInput BNon-InvertingInput BINPUTOUTPUTOUTPUTGNDGND40
NXAMP4x4NJU7630-M (X8682A0)RegulatorPSANH: IC205PCM1803ADBR (X7357B0)A/D ConverterCONTROL: IC035-038FBIN-341V VrefSoft StartV+2ER.AMP0.8V0.2VVINLVINRVREF1VREF2VCCAGNDPDWNBYPASTESTLRCK1234567891020191817161514131211MODE1MODE0FMT1FMT0OSRSCKIVDDDGNDDOUTBCKUVLOLatchSCP51V2A2kPWMSCPOSC0.5V0.5 AR T1V6 7 8DTCRTGNDBuffer1OUTVINLVREF1VREF2VINRReferenceDelta-SigmaModulatorDelta-SigmaModulatorx 1/64, x 1/128DecimationFilterWithHigh-Pass FilterSerialInterfaceMode/FormatControlBCKLRCKDOUTFMT0FMT1MODE0MODE1BYPASTESTR TPower SupplyClock and Timing ControlOSRPDWNSCKIVCCAGND DGNDVDDPQ1CX12H2ZP (X6188A0)RegulatorPSANH: IC208SG2525AN (X8960A0)PW ModulatorPSANH: IC301VIN 1 8VB2OvercurrentDetectioncircuitOverHeatDetectioncircuitDriveCircuitF/FComparatorQRS6, 7COMOscillator+-VoltageregulatorON/OFFcircuitSoftStart-+AMPV reffo Conversioncircuit453VoON/OFFVadjNCV i 15GROUND 12SYNC. 3R T 6C T 5DISCHARGE 7COMP. 9INV.INPUT 1N.I.INPUT 2ERRORAMP.V REF16REF.REG.TO INTRENALCIRCUITRYOSCILLATOROUTPUT4OSC.SCOMP.SV REF50AU.V.LOCKOUTFLIPFLOPRPWMLATCHNORNOROR13 V C11 OUTPUT A14 OUTPUT BSG1525A OUTPUT STAGE13 V C11 OUTPUT ASOFT-START8SHUTDOWN105k5kOR14OUTPUT BSG1527A OUTPUT STAGE41
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
Page 17 and 18: 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
Page 27 and 28: NXAMP4x43. PSANHA Circuit Board(Tim
Page 29 and 30: NXAMP4x45. PSANHB Circuit Board(Tim
Page 31 and 32: NXAMP4x48. Upper left (CH1) PA unit
Page 33 and 34: NXAMP4x412. Front Panel Assembly(Ti
Page 35 and 36: NXAMP4x416. Lower left DC Fan(Time
Page 37 and 38: ■ LSI PIN DESCRIPTION NXAMP4x4
Page 39: NXAMP4x4CS4272-CZZR (X8487A0)CODECC
Page 43 and 44: NXAMP4x4SN74LVC157APWR (X6786A0)Dat
Page 45 and 46: NXAMP4x4• INANH Circuit Boardto C
Page 47 and 48: NXAMP4x4• CONTROL Circuit BoardAA
Page 49 and 50: NXAMP4x4• CONTROL Circuit BoardBP
Page 51 and 52: NXAMP4x4• OUTANH Circuit BoardPat
Page 53 and 54: NXAMP4x4• PN-AN Circuit BoardAEnc
Page 55 and 56: NXAMP4x4• PN-AN Circuit BoardBPat
Page 57 and 58: NXAMP4x4• PAANH Circuit BoardAA't
Page 59 and 60: NXAMP4x4• PSANHA, PSANHB Circuit
Page 61 and 62: NXAMP4x4• PSANHA, PSANHB Circuit
Page 63 and 64: NXAMP4x4• NX-DFLT Circuit BoardEx
Page 65 and 66: NXAMP4x43. Operation3-1. Entry of t
Page 67 and 68: NXAMP4x4Switch the GPI jig to the G
Page 69 and 70: NXAMP4x44-15. ANALOG testPress the
Page 71 and 72: NXAMP4x4■ 71
Page 73 and 74: NXAMP4x4 73
Page 75 and 76: NXAMP4x4 7
Page 77 and 78: NXAMP4x4
Page 79 and 80: NXAMP4x41-5. Other0 dBu is defined
Page 81 and 82: NXAMP4x44-7. Channel separation1) G
Page 83 and 84: 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 99 and 100:
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 113 and 114:
Page 115 and 116:
NXAMP4x4CONTROLREF NO. PART NO. DES
Page 117 and 118:
Page 119 and 120:
Page 121 and 122:
Page 123 and 124:
NXAMP4x4PAANHREF NO. PART NO. DESCR
Page 125 and 126:
Page 127 and 128:
Page 129 and 130:
Page 131 and 132:
NXAMP4x4CIRCUIT DIAGRAM■ CONTENTS
Page 133 and 134:
KJIHGFEDCBANXAMP4x4■ WIRING DIAGR
Page 135 and 136:
HGFEDCBANXAMP4x4■ BLOCK DIAGRAM 2
Page 137 and 138:
HGFEDCBANXAMP4x4■ BLOCK DIAGRAM 4
Page 139 and 140:
QPONMLKJIHGFEDCBANXAMP4x4■ CIRCUI
Page 141 and 142:
Page 143 and 144:
Page 145 and 146:
HGFEDCBANXAMP4x4■ CIRCUIT DIAGRAM
Page 147 and 148:
Page 149 and 150:
LKJIHGFEDCBANXAMP4x4■ CIRCUIT DIA
Page 151 and 152:
LKJIHGFEDCBANXAMP4x4■ CIRCUIT DIA
Page 153:
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SERVICE MANUAL - Nexo

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