NAD M22 Service Manual
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NAD M22 Service Manual

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NAD
M22
STEREO
AMPLIFIER

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Summary of Contents for NAD M22

  • Page 1 STEREO AMPLIFIER...

  • Page 2: Table Of Contents

    TABLE OF CONTENTS DESCRIPTION P A G E SERVICE CAUTION…………………………………………………………..3-4 SPECIFICATIONS…………………………………………………………..5 WIRING DIAGRAM……………………………………………………………..6 BLOCK DIAGRAM…………………………………………………….. …..7-9 TROUBLE SHOOTING A GUIDE…………………........10 TROUBLE SHOOTING B GUIDE…………………........11 ………………………………………………..…..12-24 CIRCUIT DIAGRAMS PCB LAYOUT………………………………………………………………..25-30 ELECTRICAL PARTS LIST…………………………………………..31-50 EXPLODED VIEW…………………………………………………………. 51-54 EXPLODED VIEW PARTS LIST……………………………………………..55...
  • Page 3 PRODUCT SAFETY SERVICING GUIDELINES FOR AUDIO PRODUCTS CAUTION : DO NOT ATTEMPT TO MODIFY THIS 5. NO LEAD OR COMPONENT SHOULD TOUCH A PRODUCT IN ANY WAY, NEVER PERFORM CUSTOM- RECIVING TUBE OR A RESISTOR RATED AT 1 WATT IZED INSTALLATIONS WITHOUT MANUFACTURER’S OR MORE.
  • Page 4 SERVICING PRECAUTIONS CAUTION Before servicing the Stereo amplifier covered by Electrostatically Sensitive (ES) Devices this service data and its supplements and addends, read and Some semiconductor (solid state) devices can be damaged follow the SAFETY PRECAUTIONS. NOTE: if unforeseen easily by static electricity. Such components commonly are circumstances create conflict between the following servicing called Electrostatically Sensitive (ES) Devices.

  • Page 5: Specifications

    * - Gross dimension include feet, front panel and rear panel extensions (knobs, buttons, speaker terminals, sub fascia, etc.) NAD SHALL NOT BE HELD LIABLE FOR ANY TECHNICAL OR USER INTERFACE DISCREPANCIES IN THIS MANUAL. THE M22 SERVICE MANUAL MAY BE SUBJECT TO CHANGE...

  • Page 7: Block Diagram

    Block diagram unbal anced CM R DC ser vo Hypex Anal og I nput LM E49720 TL072 TL072 LM E49720 NC400 OEM M odul e Rel ay bal anced Cl i ppi ng cont r ol er OPA2134 I I C TOUCH CY8CM BR2044 M i cr o cont r ol l er...
  • Page 8 PIC18F26K20 MCU BOARD Data Bus<8> Table Pointer<21> Data Latch PORTA inc/dec logic RA0/AN0 Data Memory RA1/AN1 RA2/AN2/V -/CV PCLATH PCLATU RA3/AN3/V Address Latch RA4/T0CKI/C1OUT RA5/AN4/SS/HLVDIN/C2OUT Program Counter OSC2/CLKOUT /RA6 Data Address<12> OSC1/CLKIN /RA7 31-Level Stack Address Latch Access FSR0 Program Memory STKPTR Bank (8/16/32/64 Kbytes)
  • Page 9 TNY274 SMPS STB BOARD BYPASS/ DRAIN MULTI-FUNCTION (BP/M) REGULATOR 5.85 V LINE UNDER-VOLTAGE 115 μ A 25 μ A FAULT BYPASS PIN PRESENT UNDER-VOLTAGE AUTO- BYPASS RESTART CAPACITOR 5.85 V COUNTER SELECT AND 4.9 V LIMIT CURRENT RESET 6.4 V LIMIT STATE MACHINE CURRENT LIMIT...

  • Page 10: Trouble Shooting A Guide

    TROUBLESHOOTING A GUIDE No Pow er or Pow er shuts off immediately Check STB board check IC301 circuit Logo Amber LED on? change STB board 5V RIGHT? Check LED board Check L104 C175 C176 Touch Pow er key 5VL RIGHT? Check Q110 Q111 Q114 Q115 Q116 circuit Check PWM signal Change LED board...

  • Page 11: Trouble Shooting B Guide

    TROUBLESHOOTING B GUIDE Rear panel led show red? led turn off? Rear panel led show green? Check Q500 Q502 Q508 circuit Check D500 U505 circuit, Change NC400 OEM BOARD Apply 1khz sinew ave to DUT checkQ505 Q506 Circuit INC INH signal correct? check+/-14.5V,5V Right? Amplifier output correct? change AMP board...

  • Page 12: Circuit Diagrams

    CIRCUIT DIAGRAM 1.MCU VM1.0 0.22u/ 16v R100 C100 R101 100K XM102 XM101 R111 HOLE HOLE AudioS D101 R112 R113 R114 D140 D135 ISS 352 ISS 352 R116 U100A U100B ISS 352 D139 D137 100K Q104 C103 LM324 LM324 ISS 352 ISS 352 2SA1312 U100D...
  • Page 13 2.AMP VM1.0 D516 Q508 R590 1SS 352 D500 Over cur re nt in di cat i on GREEN D502 R503 S 352 DTA114 Q502 Q500 Q501 DTC114EKA R504 DTC114EKA D503 DTA114 R505 1SS 352 17- 01001- 12 J500 R506 R507 100R 4K75 T500...
  • Page 14 3.NC400 OEM VM1.0(1/4) Mechanical Mechanical Mechanical Spacer 3.5x6x7.3mm Hansong SDA/READY SCL/nFATAL Bare PCB SILPAD_TO220 TO126 CLIP SCCPIND Mechanical A1/OPTION A0/nAMPON Mechanical Mechanical Spacer ALU BAS316 Spacer 3.5x6.3x5mm Hansong Assembly SILPAD_TO220 IOUT Mechanical Mechanical Spacer 3.5x6x4.5mm Hansong Spacer ALU Spacer ALU -Vop +Vop Mechanical...
  • Page 15 3.NC400 OEM VM1.0(2/4) 100n 100n 100n 100n 100n 100n R144 +ISENSE+ 1u/8A 100u 100u 100u 100u 100u 2.5m +ISENSE- 100n C18 L2 R15:NC BAV99W 470R BAV99W 150p LSENSE+ BC817W 220R BAV70W MBT3906 470n BAS316 Mounting Hole FDP42AN15 LSENSE- 100p BC807W 100k FBLH MBT3906...
  • Page 16 3.NC400 OEM VM1.0(3/4) +Vop 220R T14A T14B BC856S FBLH BC856S 820R 100k 560p T15A 360k 360k BCM856S T20A +Vop BCM856S NE5532 T15B 560R 100n BCM856S 100n T20B -Vop BCM856S T17B CTRLH BC856S 560R T16A T16B T17A 360k 360k CTRLC BC856S BC856S BC856S Jumper...
  • Page 17 3.NC400 OEM VM1.0(4/4) R104 R105 LSENSE+ NE5532 +Vop R106 330R R107 IOUT R111 NC LSENSE- R108 R109 330R R110 +HVPS R111 Reset 390R R112 +ISENSE BC846BW CLIPIND BCV62B BC846BW CON_1x5MV BAS316 3VPIC R113 MMBT5401 150k R114 BC846BW R115 R116 R127 R117 R118 R151...
  • Page 18 .LED&TRIGGER&TOUCH VM1.0 5V L Q 114 D T A 114 C 1 7 5 5V L 1 0 0 N C 1 7 6 Q 115 2 U 2 D T C114 E KA L 104 D G N D 3V 3D PW M -L ED 5V S...
  • Page 19 5.SMPS VM1.0(1/5) Sheet2 - Input Voltage Selection.SchDoc Sheet4 - Main SMPS.SchDoc B06P-VL ACDET ACDET PVAUX PVAUX +VDR T12AH -VDR PVSTART PVSTART PSEN JST_B2P3_VH PVBUS PVBUS +VAUX -VAUX PSVAUX PSVAUX nFATAL nAMPON AMPOFF +5VSB +5VSB +5VSB Sheet3 - Standby SMPS.SchDoc B10B-EH-A PVBUS +5VSB PSVAUX...
  • Page 20 5.SMPS VM1.0(2/5) PVBUS BYT79X-600 BYT79X-600 R122 1000u 1000u 1000u 220n 2mH/8A 470n 470n 2mH/8A R123 1000u 1000u 1000u BYT79X-600 BYT79X-600 PVAUX R120 R116 390k 390k SS16 BCP56 PSVAUX PSVAUX PVSTART R113 100n R119 R112 R108 BAS316 BC856BW BC807W R114 BC856BW R109 LM393 R102...
  • Page 21 5.SMPS VM1.0(3/5) PVBUS L1 1u/8A 1u/8A 1u/8A 1u/8A 220p 220p FDP61N20 FDP61N20 R121 220p TR4F TR4G BAW56W BAW56W SPW32N50 220u 220u 220u 100n TR4A BAW56W BC807 BC807 BC807 BC817 TCT15 TCT15 R118 R117 100R TCT15 220p 220p FDP61N20 FDP61N20 TR4D TR4E BAW56W BAW56W...
  • Page 22 5.SMPS VM1.0(4/5) BCP56 PVCTRL PSVAUX LTV827S-V VCTRL 100n 100k BC856BW PROT BAT54J BAT54J BC856BW 1IN+ 1I N+ TR4C BAS316 BAS316 BC817W 1IN- 1I N- BC846BW TCT15 BAS316 220k 2IN+ 2I N+ 100n 100k BC807W 100n BAT54J BAT54J 2IN- 2I N- BAS316 100k D TC...
  • Page 23 5.SMPS VM1.0(5/5) Heatsink to PCB Assembly Ass1 Mechanical Mechanical Mechanical Mechanical 220n 100n M3x12 M3x12 3x5x7,5mm 3x5x7,5mm nAMPON Bare PCB SAA19L3W0H8T1 BC856BW PCB1 BAW56W SMPS_ON BC846BW Heatsink to L-Profile BC856BW Mechanical Mechanical Mechanical M3x6 M3x6 M3x6 BAS316 Mechanical Mechanical Mechanical SBA19L12W5H3T1 M3x6 M3x6...
  • Page 24 6.SMPS STB VM1.0 CY301 D303 1nF/AC250V TVS SMAJ200A T301 C301 SS36 60V/3A 400V/10UF D301 5VDS D305 L301 Comment: 10UH R301 C303 C304 100PF/1KV C305 C306 C311 D304 1000uF/10V 1000uF/10V BYG20J 600V/1 100nF/50V 100nF/50V BAS321 D302 TH301 SCK10054 5R/4A DSGND TNY274 IC301 C302 EE16E...

  • Page 25: Pcb Layout

    PCB LAYOUT 1.MCU VM1.0 BOARD Top Layer Bottom Layer...
  • Page 26 2.AMP VM1.0 BOARD Bottom Layer Top Layer...
  • Page 27 3.NC400 OEM VM1.0 BOARD Top Layer Bottom Layer...
  • Page 28 4.TRIGGER VM1.1 BOARD Top Layer Bottom Layer 5.TOUCH VM1.1 BOARD Top Layer Bottom Layer 6.LED VM1.1 BOARD Bottom Layer Top Layer...
  • Page 29 5.SMPS VM1.0 BOARD Top Layer Bottom Layer...
  • Page 30 6.SMPS STB VM1.0 BOARD Top Layer Bottom Layer...

  • Page 31: Electrical Parts List

    ELECTRICAL PARTS LIST PCB-1: MCU BOARD A16-62201-21 MCU Board VM1.0,FR-4,1.6mm,2Layers,2oz, TG130 DIODES D166, D167 33-44148-16 Switch Diode SMD CD4148WP D101, D104, D109, D111, D134, D135, D136, D137, D139, D140, 33-40352-01 Switch Diode 1SS352(TPH3,F),1SS355TE-17 D141, D142, D146, D147 D105, D106, D107, D112, D113, 33-14709-09 Zener Diode BZT52C4V7,4.7V,350mW...
  • Page 32 7.5KΩ,0603,1/10W,±1%,RC0603FR- t s i 077K5L 12KΩ,0603,1/10W,±1%,RC0603FR- t s i 0712KL t s i Ω,0603,1/10W,±1%, t s i Ω, 1210, ±1% RL1210FR-070R47L R165, R341,R342 07-93901-00 Chip resistor 3.9KΩ,0603,1/10W,±1%, R338,R339,R340,R346, R347, 07-96800-00 Chip Resistor 680Ω,0603,1/10W,±1%, R348 R107, R108, R151, ,R167, R185, R208, R214, R239, R241, R296, 10KΩ,0603,1/10W,±1%,RC0603FR- 07-91002-00 Chip Resistor...
  • Page 33 C104, C122, C124, C125, C129, C132, C133, C136, C139, C140, 26-10451-10 Ceramic Chip Capacitor 100nK,50V,0603,X7R C143, C147, C152, C155, C158, C164, C173 t i c t i c 10uK,10V,0603,X7R ECJ1VB1C106J/ECJ1VB1H106J/ECJ1 C103, C105 26-10611-10 Ceramic Chip Capacitor VB1E106J/C0603C106K8RAC/C0603C 106K4RAC/C0603C106K3RAC/C0603C 106K5RAC C162, C163, C166, C167, C168 26-22351-01 Ceramic Chip Capacitor 22nK,50V,0805,X7R...
  • Page 34 DIODES D501, D502, D503, D504, D505, D506, D507, D508, D509, D510, 33-40352-01 Switch Diode 1SS355TE-17 D511, D512, D513, D514, D516 LED(Red/Green Dual Φ3mm Red&Green,AC,BL-BEG201Q-B Color) TRANSISTORS Q500, Q508 31-00114-01 Digital transistor DTA114EKA Q501, Q502 31-00114-05 Digital transistor DTC114EKA Q503, Q504 31-01015-03 Transistor A1015, SOT23...
  • Page 35 t s i Ω,0603,1/10W,±1% R510, R511, R517, R531, R535, 47KΩ,0603,1/10W,±1%,RC0603FR- 07-94702-00 Chip Resistor R569, R574 0747KL 100KΩ,0603,1/10W,±1%,RC0603FR- R560, R562 07-91003-00 Chip resistor 07100KL 220KΩ,0603,1/10W,±1%,RC0603FR- R512, R533, R516, R530 07-92203-00 Chip resistor 07220KL 330KΩ,0603,1/10W,±5%,RC0603JR- t s i 07330KL 100Ω,0805,1/8W,±1%,RC0805FR- t s i 07100RL R501, R554, R555, R578, R579, 100Ω,0805,1/8W,±5%,RC0805JR-...
  • Page 36 C541, C549, C507, C511 26-10352-02 Ceramic Chip Capacitor 1206, 10nF, 500V, X7R, ±10% C538, C547, C510, C513, C540, 10uF, 25V, X5R, 1206, 26-10621-12 Ceramic Chip Capacitor C543, C555 C3216X5R1E106KT 330nK,250V,1210,X7T C542, C550 26-33422-03 Ceramic Capacitor SMD C3225X7T2E334KT000N C535, C546, C559, C560, C561, 100uF,100V,10×20mm, ±20%,105 ℃...
  • Page 37 D1, D2, D7, D8 33-40099-02 High speed Diode BAV99W-7-F D3, D11, D15, D19, D22, D24, 33-20316-01 High speed Diode BAS316 D25, D26, D29 TRANSISTORS t s i t s i T10, T13, T21, T22, T26, T29, 31-00846-02 Transistor BC846BW SOT323 T31, T34, T36, T38, T41, T42 t s i T7, T25, T28...
  • Page 38 270Ω,0603,1/10W,±1%,RC0603FR- t s i 07270RL 330Ω,0603,1/10W,±1%,RC0603FR- R106, R109 07-93300-00 Chip Resistor 07330RL 470Ω,0603,1/10W,±1%,RC0603FR- t s i 07470RL 560Ω,0603,1/10W,±1%,RC0603FR- R69, R73, R83, R89 07-95600-00 Chip Resistor 07560RL R34, R38, R39, R55, R87, R88, 1KΩ,0603,1/10W,±1%,RC0603FR- 07-91001-00 Chip Resistor R103, R115, R121, R128 071KL 1.2KΩ,0603,1/10W,±1%,RC0603FR- t s i...
  • Page 39 360KΩ,0805,1/8W,±1% RC0805FR- R61, R62, R78, R79 07-93603-01 Chip Resistor 07360KL 6R8,1206, 0.5W,±1%,RC1206FR- t s i 7W6R8L 10KΩ,1206,1/4W,±1%,RC1206FR- R114, R125, R126, R129 07-91002-02 Chip Resistor 0710KL 33KΩ,1206,1/4W,±1%,RC1206FR- t s i 0733KL 0.0025Ω,2512,1W,± t s i 1%,WSL25122L500FEA ± , CAPACITORS t i c t i c 100pJ,50V,0603,NPO,C1608C0G1H101 C20, C65, C70, C71...
  • Page 40 Φ3 blue zinc plated GB/T848-2002, M3, black zinc plated, 63-010305-2 Washer ID=3.2mm,OD=6mm 78-238001-0 Insupad Silpad Silica gel,11x10x0.2mm,TO126 78-015002-0 Screw insulator M3 TW-5 Misc and Machanical parts 17-03001-16 Binding Post gold plating,TH>0.06u 17-03001-17 Binding Post gold plating,TH>0.06u 70-375004-0 Main Heatsink 6363 T5 70-375005-1 L Heatsink Right 6363 T5...
  • Page 41 VM1.1,VM1.1,FR- A16-32705-22 Touch PCB 4,1.6mm,2Layers,1oz,TG130,50×15mm VM1.1,FR- Trigger/LED/Touch Board A16-32740-22 4,1.6mm,2Layers,1oz, TG130,110× ASSM 96mm four button capsense CY8CMBR2044-24LKXI controller RESISTOR 560Ω,0603,1/10W,±5%,RC0603JR- t s i 07560RL 10KΩ,0603,1/10W,±1%,RC0603FR- t s i 0710KL R132, R154, R311, R318 07-90000-00 Chip Resistor 0Ω, 0603, ±5% CAPACTIOR t i c t i c ±...
  • Page 42 742792662, i r r 1000ohm@100MHz,Imax=600mA CONNECTORS 2mmPitch,2*4Pin,CNT-B200-2*4-GS- 2.8-N MCU PCB-Touch PCB 14-32704-10 FPC Cable 4Pin,1.0mmPitch,L=160mm,coplanar MCU PCB-Touch PCB 14-32708-20 Cable CNT-C200-8-260 FC PCB-7: SMPS BOARD VM1.0,FR- A16-32707-21 Bare PCB SMPS 4,1.6mm,2Layers,2oz, TG130,200× 126mm DIODE D6, D7, D12, D25, D26, D30, 33-20316-01 High speed Diode BAS316...
  • Page 43 Self-Supplied Monolithic NCP1014ST65T3G Switcher RESISTORS Power Metal Strip Chip 0.018Ω,2512,2W,± Resistor 1%,WSL2512R0180FEA18 R46, R47, R48 07-91209-00 Chip Resistor 12Ω,0603,1/10W,±1%, R10, R17, R29, R35, R40, R65, 10Ω,0603,1/10W,±1%,RC0603FR- 07-91009-00 Chip resistor R74, R78, R121 0710RL 100Ω,0603,1/10W,±1%,RC0603FR- t s i 07100RL 220Ω,0603,1/10W,±1%,RC0603FR- t s i 07220RL 180KΩ,0603,1/10W,±1%,RC0603FR- R95, R96, R100...
  • Page 44 C35, C36, C40, C45, C46, C53, C57, C61,C63, C68, C73, C74, 26-10451-10 Ceramic Chip Capacitor 100nK,50V,0603,X7R C77, C78 C47, C55, C56, C58, C60, C65 26-10511-20 Ceramic Chip Capacitor 1uK,16V,0603,X7R,C1608X7R1C105K 220nK,25V,0603,X7R,C1608X7R1E224 t i c 220pK,500V,0805,X7R,0805B221K501N C38, C43, C49, C54, C69, C72 26-22152-01 Ceramic Chip Capacitor T/HCM0805X7RR221K501PT...
  • Page 45 2X3P MV 6.2mm PCB JST,JST VL- series FUSE Φ6, CB-HFT MISC and Mechanical Mechanism parts LEFT SPACER 85-320002-0 Nylon screw M3-12N RIGHT SPACER 61-023512-1 Machine Screw MB3X12 ,Blue zinc plated PRESPACER/2 61-063520-1 Machine Screw MF3X20, Blue zinc plated 61-063508-1 Machine Screw MF3×8,Blue zinc plated 61-063506-1 Machine Screw...
  • Page 46 Automatic X Cap CAP017DG-TL SO-8 CAP017DG-TL Discharge IC l l o RESISTORS 10Ω,0805,1/10W,±1%,RC0805FR- t s i 0710RL 100Ω,0805,1/8W,±1%,RC0805FR- t s i 07100RL 220Ω,0805,1/8W,±1%,RC0805FR- t s i 07220RL t s i Ω,0805,1/8W,±1%,RC0805FR-071KL 2.2KΩ,0805,1/8W,±1%,RC0805FR- R309, R310 07-92201-01 Chip resistor 072K2L 10KΩ,0805,1/8W,±1%,RC0805FR- t s i 0710KL 22KΩ,0805,1/8W,±1%,RC0805FR- t s i...
  • Page 47 TRANSFORME HJ-M22/M27-EE16,Black tape CONNECTORS A11-01201-03 Rocker Switch 1552.3112 A17-07103-08 AC Inlet UL1672#18AWG,L=100mm,Add the Chassis TO AC INLET A14-26501-01 1PIN CBALE circular 19-22008-00 Ferrite Ring HJ-2208,T22×14×8 10K,Ferrite Ring L/N - STANDBY PCB A14-62202-00 WIRES UL1672#16AWG, , L=400mm FUSE SEAT-SWITCH A14-33201-01 1PIN CBALE...
  • Page 48 J71-267002-0 Masters II Feet 71-267003-0 Feet Shoe Assy J71-267903-0 Masters II Feet Shoe 78-267001-0 Feet PAD Poron MX-48HF BLACK J71-355001-0A NAD Logo 96-355001-0A Touch Key Cap 18*6*2 69-355002-0 Touch Key Copper plate T2Y2 T=0.2mm 86-355001-0 Adhesive tape 3M 9448,T=0.1mm FASTENERS...
  • Page 49 ，T=1mm 79-375002-0 LED Board Foam EVA,black,50x52mm,T=1mm PACKING 88-375001-0A Carton Box 547*495*219mm N88-375003-1 Paper Corner 50*50*5mm,L=197mm 89-355901-0 Cushions Assy 88-355005-0A Paper Formed Box 88-355006-0 Cushion First Layers BC, 525*480*7mm 88-355007-0 Cushion Second Layers BC, 525*480*7mm 88-355008-0 Cushion Third Layers BC, 尺寸:525*480*7mm 88-355009-0 Cushion Forth Layers 525*480*7mm...
  • Page 50 40×30mm,base color:Pantone cool gray 86-004030-0 Copperplate Label 94-054002-0 Grouding Label φ10...
  • Page 51 M22 Amp Module L M22 Amp Module R S022 S022 S022 S022 S022 A006 S022 A001 A005 A001 A005 S023 S024 S023 S023 S023 S024 S024 S024 A006 S003 S023 A002 A004 A004 S003 A007 A002 A007 A011 A008 A003...

  • Page 52: Exploded View

    M22 Packing Exploded View REF.N0 Part No. Description Qty. 88-375004-0A Shipping Box 88-375001-0A Carton Box 89-355901-0 Cushions Assy 88-375003-1 Paper Corner 00-62200-10 M22 Unit (AH Version) 00-62200-20 M22 Unit (C Version) 90-355002-1 Woven Bag 88-355003-0A Accessory Box 88-267002-0 Accessory Box Sheet...
  • Page 53 M22 SMPS Exploded View P004 P005 P001 P003 S030 P005 P006 S028 S031 S025 S030 S027 S026 S029 P006 P007 S025 P002 S029 REF.N0 Part No. Description Qty. P001 01-62207-10 SMPS BOARD (AH) AH:1 01-62207-20 SMPS BOARD ( C) P002...
  • Page 54 M22 ASSY EXPLODE VIEW...

  • Page 55: Exploded View Parts List

    M22 EXPLODED VIEW PARTS LIST REF.NO PART NO. DESCRIPTION Qty. REF.NO PART NO. DESCRIPTION Qty. C001 67-375001-1 Chassis R002 A11-01201-03 Rocker Switch C008 J71-267903-0 Masters II Feet Shoe C009 78-267001-0 Feet PAD T001 70-267007-1 Main Top Cover C010 01-62290-00 AMP Board Module (Left)

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