NAD D7050 Service Manual
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NAD D7050 Service Manual

Direct digital network amplifier
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NAD
D7050
Direct Digital
Network Amplifier

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Summary of Contents for NAD D7050

  • Page 1 D7050 Direct Digital Network Amplifier...
  • Page 2 TABLE OF CONTENTS DESCRIPTION P A G E SERVICE CAUTION…………………………………………………………..3-4 SPECIFICATIONS…………………………………………………………...5 WIRING DIAGRAM……………………………………………………………6-9 TROUBLE SHOOTING GUIDE…………………..........10 EXPLODED VIEW PARTS LIST………………………………………..11a & b CIRCUIT DIAGRAMS..………………..........12-25 PCB LAYOUT………………………………………………………………..26-32 ELECTRICAL VIEW PARTS LIST…………………………………...…..33-47...
  • Page 3 PRODUCT SAFETY SERVICING GUIDELINES CAUTION : DO NOT ATTEMPT TO MODIFY THIS PRODUCT IN VOLTAGE MEASURE MUST NOT EXCEED 75 VOLTS R.M.S. ANY WAY. NEVER PERFORM CUSTOMIZED INSTALLATIONS THIS CORRESPONDS TO 0.5 MILLIAMP AC ANY VALUE WITHOUT MANUFACTURER’S APPROVAL. UNAUTHORIZED EXCEEDING THIS LIMIT CONSTITUTES A POTENTIAL MODIFICATIONS WILL NOT ONLY VOID THE WARRANTY, BUT SHOCK HAZARD AND MUST BE CORRECTED IMMEDIATELY.
  • Page 4 SERVICING PRECAUTIONS CAUTION : Before servicing the A/V Receiver covered by this Electrostatically Sensitive (ES) Devices service data and its supplements and addends, read and follow the Some semiconductor (solid state) devices can be damaged easily by SAFETY PRECAUTIONS. NOTE : if unforeseen circumstances static electricity.

  • Page 5: Specifications

    Shipping weight NAD SHALL NOT BE HELD LIABLE FOR ANY TECHNICAL OR USER INTERFACE DISCREPANCIES IN THIS MANUAL. THE D 7050 OWNER’S MANUAL MAY BE SUBJECT TO CHANGE WITHOUT PRIOR NOTICE. CHECK OUT WWW.NADELECTRONICS.COM FOR THE LATEST VERSION OF THE D 7050 OWNER’S MANUAL.

  • Page 6: Block Diagram

    BLOCK DIAGRAM Head phone Pre o u t/SUB M U TE Bluetooth H ead Ph o ne module VC C O U TPUT DDF A SP I C O NT R O L ST A G E L INT ER F A C E SP DI F COA X 1 M C LK 108M...
  • Page 7 ZXCZM800 AMP BOARD Digital input: Digital input: DSP: Programmable DSP: Programmable Amplifier: Amplifier: Digital Digital Serial interface Serial interface filtering & delay filtering & delay DSP, volume DSP, volume audio audio & mix & mix & PWM & PWM Digital input: Digital input: DSP: Programmable DSP: Programmable...

  • Page 8: Amp Board

    Connection outline diagram for 8 single ended channels AMP BOARD Master Master clock input clock input Output Output Output Output stages and stages and stages and stages and feedback feedback feedback feedback controllers controllers controllers controllers Feedback Feedback References References References References &...
  • Page 9 ZXCZM800&ZXCZA200 System architecture AMP BOARD Bridge supply Bridge supply Digital Digital audio audio input input Channel Channel Channel Channel amplifier amplifier Digital Digital Gate Gate Filter Filter H bridge H bridge driver driver control control input input Digital Digital ZXCZM800 ZXCZM800 feedback feedback...
  • Page 10 TROUBLE SHOOTING GUIDE Connect AC Cord fr om D7050 CHECK THE LED CONTROL CIRCU IT , IS AMBE R LED LIGH TE D? IS LED RED? AND PROTECET CIRCUIT CHECK TOUCH BOARD , IS LED WHIT E? OR SOFTWARE ER ROR...
  • Page 11 Exploded View D7050 A D7050 PART LIST ITEM PART NO. PART NAME REMARK 77-325001-2 TOP COVER 70-325011-1 BADGE 67-325001-2D REAR PLATE 70-325001-4 INNER PLATE 70-325002-3 HEAT SINK A 75-325003-0 ANTENNA BRACKET 66-325004-0 VENT PLATE 75-325002-0 ROUND COVER 77-325002-1 BOTTOM COVER...
  • Page 12 Exploded View D7050 B ITEM NAME 14-22308-00 14-23324-00 14-23308-01 14-04306-00 29-04601-02 14-233006-00 14-23304-11 A07-70022-18 14-23310-00 01-23308-00 PSU BOARD 01-23307-00 HEAD PHONE BOARD 01-23302-00 FPP BOARD 01-23304-00 SOURCE BOARD 01-23303-00 VOLUME BOARD 01-23306-00 TOUCH BOARD 01-23301-00 AMP BOARD 01-23305-00 TRIGGER BOARD...
  • Page 13 CIRCUIT DIAGRAMS 1.AMP BOARD VM2.1(1/8) DDFA MODULATOR VM1.2 C 3V3 C 3V3 C 3V3 C 48 C 49 C H5_R EF 0 VC C C H5_R EF 1 C H5_R EF 2 MB_MJ MC K0 R 124 C H3_R EF 0 C H4_R EF 2 C 108_2 C H3_R EF 1...
  • Page 14 1.AMP BOARD VM2.1(2/8) DDFA OP STAGE VM1.2 PR V N chG at e Q 13 BC817-2 5-7-F(NC) SU M ut eN 10k(NC) 10k(NC) 10k(NC) Q 12 BC807-2 5-7-F(NC) SU M ut eP 10k(NC) N RV PchG at e C903 N C7N Z17K 8X PR V O P1 Top dri v e...
  • Page 15 1.AMP BOARD VM2.1(3/8) DDFA PSU VM1.2 C3V 3 S3V 3 U 8005 K A 278R05 U 19 ZLD O 1117K TC 5V 6D V i n V out 10uH 10uH BM B2A 0600RS2 C125 C120 150R 4u7F 3V 3 C126 100uF 100uF R132...
  • Page 16 1.AMP BOARD VM2.1(4/8) DDFA ATP VM1.2 N 5V A 5V 4u7F 4u7F 4u7F 4u7F S2O _A S2O _B 110R 110R 4u7F 10pF 10pF C108_A C108_B 10pF 10pF G N D PW M CK 120pF 120pF 150R 150R PW M CK PW M CK G N D G N D...
  • Page 17 1.AMP BOARD VM2.1(5/8) DDFA MAIN INTERFACE VM1.2 T1002 AES/SPDIF 1 :1 R 10 0 3 L1001 C 10 0 2 C1035 C3V 3 C 7 0 22U/6.3V INPU T1 RX 3 P1006 K EY _RST K EY _RST C 10 0 5 100n X 7R 100n K EY _W PS...
  • Page 18 1.AMP BOARD VM2.1(8/8) 1.AMP BOARD VM2.1( /8) MAIN MCU VM1.2 A V 3CTRL0 5V 6D L1014 A V 3CTRL1 N RESET C 1087 C 1088 U 24 5V 6D C 19 1 P1005 3V 3D L1023 C 1089 100nF 100nF 4.
  • Page 19 1.AMP BOARD VM2.1(7/8) DDFA DAC VM1.2 A 5V C305 220U / 10V C306 C148 220U / 10V G N D 470pF LA _REF0 3k32 N 5V A 5V LA _REF1 3k32 C149 U 27A LA _REF2 N JW 4580 53k6 100uF D A CL 300R...
  • Page 20 1.AMP BOARD VM2.1(8/8) DDFA CONNECTOR VM1.2 A 5V PR V R1134 C1000 D 1000 O V C_D ET 10k(NC) O V CD ET Q 1000 2SA 1015 R1136 R1137 R1138 100k(NC) R1140 Q 1010 G N D D 17 2S C 1815 10nF(NC) 100k(NC) Q 14...
  • Page 21 2.BLUETOOTH MODULE BOARD VM1.2...
  • Page 22 3.FPP BOARD VM1.2 L500 D 504 L501 U 500 15V D 10uH SS36 C 5 17 C 5 0 0 10 0 n 15V D U 501 C 5 18 V IN 4 U 7 CTRL 113 K CO M P G N D G N D R 5 0 2...
  • Page 23 4.VOLUME ENCODE BOARD VM1.2 R 5 2 7 R 5 2 8 10 K 10 K V O LU M E EN C O D E R J 502 S500 C50 9 4P IN 7. 8 C 5 1 0 C 5 1 1 EN CO D E 10 0 n...
  • Page 24 6.INT BOARD VM1.2 J 10 0 6 A R 10 5 5 0 R J P1001 C 10 7 2 C 10 7 3 2 2 0 pF N . I. 232 gnd 4PIN 7. 8 C 10 8 2 C 10 8 3 2 2 0 pF N .
  • Page 25 7.HEADPHONE BOARD VM2.1 H eader 8 C K X -3 . 5 -0 2 K 8.TOUCH BOARD VM2.1 D 401 D 402 D 403 CO N 1002 Q 412 Q 413 Q 411 2S C 3326 2S C 3326 R503 R502 R504 2S C 3326...
  • Page 26 9.PSU BOARD VM1.2 5. 6V D R205 O P201 R 201 C 202 100P PC 817 1nF/ A C250V C Y201 D 202 TV S SM A J200A T201 SS36 60V / 3A D 216 L201 C201 10uF/ 400V CD 263 5.

  • Page 27: Pcb Layout

    PCB LAYOUT 1.AMP BOARD VM1.2 Top Layer...
  • Page 28 1.AMP BOARD VM1.2 Bottom Layer...
  • Page 29 2.BLUETOOTH BOARD VM1.2 Top Layer Bottom Layer 3.TOUCH BOARD VM1.2 Bottom Layer Top Layer...
  • Page 30 4.FPP BOARD VM1.2 Bottom layer Top Layer 5.VOLUME ENCODE BOARD VM1.2 Top Layer Bottom Layer...
  • Page 31 6.SOURCE ENCODE BOARD VM1.2 Bottom Layer Top Layer 7.HEADPHONE BOARD VM1.2 Top Layer Bottom Layer...
  • Page 32 8.INT BOARD VM1.2 Top Layer Bottom Layer...
  • Page 33 9.PSU BOARD VM1.2 Top Layer Bottom Layer...

  • Page 34: Electrical Parts List

    ELECTRICAL PARTS LIST PCB- 1 : AMP BOARD PART NO. CIRCUIT NO. DESCRIPTION PCB INFO VM1.2,FR-4,Four Layers A16-23301-23 AMP PCB 1.6mm,,TG130,150mmX212mm, DIODES D3, D6, D14, D1003, D1004, D1010, c t i D1011, D1014, D1015, D1016, D1017 D8_Ch0, D8_Ch1, D908_Ch0, D908_Ch1 D9_Ch0, D9_Ch1 33-20054-04 Schottky Rectifier Diode...
  • Page 35 TinyLogic UHS Dual Buffer with NC7WZ17 Schmitt Trigger SN74HC595D/74HC595D/MM74HC5 t f i t s i RESISTORS R110, R112, R114, R116, R121, t s i Ω, 1/10W,±5% R155, R157, R1022 t s i Ω, 1/10W,±1% t s i Ω, 1/10W,±1% R1019, R139, R144, R146 07-91009-00 Chip Resistor 10Ω, 1/10W, ±1%...
  • Page 36 R902_Ch0, R902_Ch1 07-95601-00 Chip Resistor 5K6Ω, 1/10W, 1% R1076, R1095, R1059, R1060, R1061, R1062, R1084, R1110, R100, 07-91002-00 Chip Resistor 10KΩ, 1/10W, ±1% R122, R126, R130 t s i Ω,0603,1/10W,±1% 3.24KΩ,1/10W,±1%,0603,RC0603FR- t s i 073K24L t s i Ω, 1/10W, ±1% R1079, R1136, R1138, R1151, R1154 07-91802-00 Chip Resistor 18KΩ, 1/10W, ±1%...
  • Page 37 t i c t i c t i c t i c C18, C19, C141, C143, C1095 26-47151-00 Ceramic Capacitor SMD 470pF, 5%, 50V, NPO t i c C20, C21, C95, C158, C1000, C1005, C1016, C1135, C1021, C1022, 26-10251-10 Ceramic Chip Capacitor 1nJ,50V,0603,NPO C1025, C33, C34 C92, C157, C202, C1134...
  • Page 38 C59, C1001, C1011, C1032, C1058, C1115, C1002, C1015, C1028, 26-22660-11 Ceramic Chip Capacitor 22uF, 6.3V, X5R, 0805 C1029, C303 22uM,10V,0805,X5R,LMK212BJ226M t i c t i c C913_Ch0, C913_Ch1 26-22351-12 Ceramic Chip Capacitor 22nF,50V 1206, NPO 4.7uZ,50V,1206,Y5V,C3216Y5V1H47 C114, C128, C190, C193 26-47551-02 Ceramic Chip Capacitor C38, C39, C40, C63, C65, C136,...
  • Page 39 20%,105℃ EEUFK1V222L,2200uF,35V,± C30, C51, C53, C62 06-22231-03 Alu Electrolytic Capacitor 20%,105℃ TEMPLATES FOR C 37-30870-20C BridgeoCO Module CX870-3BD(D7050 S9575.144.1000) 94-272010-0 230V Version Label 10x10mm 86-000087-0 Copperplate Label 10mm×10mm TEMPLATES FOR AH 37-30870-43C BridgeoCO Module CX870-3BD(D7050 S9575.144.3700)
  • Page 40 94-272011-0 120V Version Label 10x10mm 86-000087-0 Copperplate Label 10mm×10mm CONNECTORS 29-04601-02 External Antenna L=150mm 2.54mm,5pin,CNT-M254-1*5-GS-5/3- 2.0mm, 2x12Pin, CNT-B200-2*12- GS-2.8-N RCA2-W-R 2 heads,orange ,AV2-8.4-13PB1, (4u) & t c i t 67-114001-0 PCB Terminal HS40-360.1-B009V1-M002 85-325001-0 Nylon Spacer HP-45 85-325002-0 Plastic Screw M3-8F 85-172001-0 Plastic Spacer-Screw...
  • Page 41 RESISTORS t s i Ω,0603,1/10W,±5% t s i Ω,0603,1/10W,±1% t s i Ω,0603,1/10W,±1% t s i Ω,0603,1/10W,±5% t s i Ω, ±5% R0603X4 t s i Ω,0603,1/10W,±5% 4.7KΩ,0603,1/10W,±5%,RC0603JR- t s i 074K7L t s i Ω,0603,1/10W,±5% t s i Ω,0805,1/8W,±5% t s i Ω, 0603, ±5% t s i...
  • Page 42 VM1.4,FR-4,1.6mm,Two A16-23304-25 source encode PCB Layers,1oz,,TG130,25×38mm VM1.4,FR-4,1.6mm,Two A16-23320-25 FPP PCB Layers,1oz,TG130,117.6×124.1mm RESISTORS t s i Ω,0603,1/10W,±1% CAPACITOR t i c ± , t i c ± , CONNECTORS PCB-6:INT BOARD PCB INFO VM1.4,FR-4,1.6mm,Two A16-23305-25 INT board PCB Layers,1oz,TG130,29×70mm VM1.4,FR-4,1.6mm,Two A16-23320-25 FPP PCB Layers,1oz,TG130,117.6×124.1mm DIODES...
  • Page 43 CONNECTORS ACCESSORIES 69-325001-2 button copper QSn 6.5 69-325901-2 button copper QSn 6.5 × × l i f × × PCB-9:PSU BOARD PCB INFO VM1.1,FR-4,1.6mm,Two Layers,1oz, A16-23308-22 SMPS PCB TG130,尺寸:206×78mm DIODES D203, D204, D205, D206, D207, D208, D209, D210, D211, D212, 33-40321-00 General Purpose diode BAS321...
  • Page 44 510Ω,0805,1/8W,±1%,RC0805FR- t s i 07510RL 1KΩ,0805,1/8W,±1%,RC0805FR- R201, R202, R205, R237 07-91001-01 Chip resistor 071KL 1.8KΩ,0805,1/8W,±1%,RC0805FR- t s i 071K8L 2.2KΩ,0805,1/8W,±1%,RC0805FR- t s i 072K2L 2.7KΩ,0805,1/8W,±1%,RC0805FR- t s i 072K7L 3.3KΩ,0805,1/8W,±1%,RC0805FR- t s i 073K3L 4.7KΩ,0805,1/8W,±1%,RC0805FR- R242,R253,R254,R259 07-94701-01 Chip resistor 074K7L 9.1KΩ,0805,1/8W,±1%,RC0805FR- t s i 079K1L...
  • Page 45 100nK,50V,0805,X7R,C2012X7R1H1 C205, C206, C212, C233, C227, C236 26-10451-11 Chip capacitor 04KT t i c 680nK,25V,0805,X7R,C2012X7R1E6 t i c 84KT000N t i c 2.2uFK, 25V X5R, t i c 0805,C2012X5R1E225KT 4.7uFK, 25V X5R, t i c 0805,C2012X5R1E475KT 1.2nF,200V,±5%,NPO, t i c C1206N122J201T / MA1206CG- 122J-201ERG / t i c...
  • Page 46 TRANSFORMER CONNECTORS 2.54mm, 2Pin NTC201,NTC202 13-22502-14 Jumper Cap CNT-MJ254-02-O 2.54mm, 2Pin, NTC201,NTC202 13-12502-19 Connector CNT-M254-1*2-GS-5.6/3-N A78-000040-1 Heat Shrinking Tube Φ4,CB-HFT i r r × × Connect Power Board And AMP Board RELAY FUSES METAL PARTS Q201, Q204, Q213, D221 61-023510-0 Machine Screw MB3×10 Q202, Q203, Q205, Q206...
  • Page 47 79-325003-0 RUBBER Support 10*10mm T=4.5mm 79-325004-0 Sharft Sleeve PTFE ,12.9x15mm 79-325002-0 Sharft Sleeve PTFE × × METAL PARTS J71-325001-0 knob _vol assy J71-325102-0 knob_sec assy or J71-325002-0 knob_sec assy × × × × × × × FASTENERS 61-022206-6 Self Tapping Screw BTB2.6×6, 61-023208-0 Self Tapping Screw...
  • Page 48 Outside the carton(2) 94-325004-1 Version Label 115×85mm,R=1mm AC Cord C LP34&LS-60 H05VV-F 0.75mm2 3C JA15-16250-03 AC Cord Black L=1800mm 3PINS 16A 250V LF L=6'7" LP-34 or JA15-16250-00 AC Cord H05VV-F 3C LS- 60 Outside the carton(2) 94-325014-0 Version Label 115×85mm,R=1mm ×...

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