SERVICE MANUAL - Nexo

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NXAMP4x4HGFEDCBA■ BLOCK DIAGRAM 5/5 NXAMP4x4 LEVEL DIAGRAMThis level diagram is for the purpose of circuit design only.The actual gain structure will depend on the firmware that is used.1Input_Amp(PCB INANH)Input_VR(PCB Control)ADC buffer(PCB Control)Digital DomainDAC buffer(PCB Control)Output_VR(PCB Control)Power_Amp(PCB PAANH)31 2CS3318CS4272 Codec +DSPCS33182-14dBFixed Gain0.25dB stepVariable Gain+6dBFixed Gain-0.4dBFixed Gain0.25dB stepVariable Gain+37dBFixed GainMAXIMUMLEVEL+43.8dBu3Maximum InputVoltage+28.0dBu4Sensitivity+10.0dBu-14.0dB+14.0dBu-12.5dB+6.0dB+7.5dBu+6.2dBu-0.4dB+5.8dBu+1dB+6.8dBu+1.5dBu-4.0dBu+5.5dB-96dB5Note:The solid line shows the gain structure in the analog test mode of the test program.The broken line shows an example in the setting that allows the maximum input signal level28CA1-2001022110-508
QPONMLKJIHGFEDCBANXAMP4x4■ CIRCUIT DIAGRAM 1/15 (CONTROL 1/6)12345678910Note:11See parts list for details of circuit board component parts.28CC1-2001022127-10 0129
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SERVICE MANUAL■ CONTENTS PANEL LA
Page 3 and 4:
NXAMP4x4■ PANEL LAYOUT • Front
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NXAMP4x4■ SERVICE PRECAUTIONS Saf
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NXAMP4x4■ OVERALL ASSEMBLY WIRING
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NXAMP4x43. Wiring of the FANConnect
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NXAMP4x4d, e) Fix the wires to the
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NXAMP4x4CN401YELLOW Fig. 20 NOTE:
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NXAMP4x4b-3) Then fasten these wire
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NXAMP4x4At the stage as shown in Fi
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NXAMP4x4o) Fasten the wires (WK0208
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NXAMP4x48. Color of the connectors
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NXAMP4x412. Confirmation of Switch
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NXAMP4x4■ DISASSEMBLY PROCEDURES
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NXAMP4x43. PSANHA Circuit Board(Tim
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NXAMP4x45. PSANHB Circuit Board(Tim
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NXAMP4x48. Upper left (CH1) PA unit
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NXAMP4x412. Front Panel Assembly(Ti
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NXAMP4x416. Lower left DC Fan(Time
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■ 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■
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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 and 136: HGFEDCBANXAMP4x4■ BLOCK DIAGRAM 2
Page 137: HGFEDCBANXAMP4x4■ BLOCK DIAGRAM 4
Page 141 and 142: 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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