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NAD D3020 Service Manual

NAD D3020
52 pages
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NAD
SERVICE MANUAL
D3020
Hybrid Digital Amplifierr
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NAD D3020 Specifications

General IconGeneral
Subwoofer OutputYes
DAC Resolution24-bit/96 kHz
Power Output30W into 8 Ohms
Inputs1 x Coaxial, 2 x Optical, 1 x USB, 1 x Analog
BluetoothYes, aptX
Analog Inputs1 x RCA
Headphone OutputYes (3.5mm)
Frequency Response20Hz - 20kHz
Input Impedance10 kOhms
Total Harmonic Distortion (THD)<0.005%

Summary

Product Safety and Servicing Precautions

General Safety and Servicing Guidelines

Essential safety and servicing procedures to prevent hazards and component damage.

Installation and Environmental Tips

Guidelines for safe and optimal product installation and placement.

Servicing Precautions

General Servicing Precautions

General guidelines to follow before and during product servicing.

Insulation Checking Procedure

Procedure to test electrical insulation resistance for safety.

Handling Electrostatic Sensitive Devices

Precautions for handling sensitive electronic components to prevent damage.

Technical Specifications

Audio Specifications

Technical parameters related to the audio performance of the amplifier.

General Specifications

General technical details including dimensions, weight, and power consumption.

System Diagrams

Wiring Diagram

Visual representation of electrical connections between components.

Block Diagram

High-level overview of the amplifier's functional blocks and data flow.

Component Schematics

Preamp Board Schematics (CS42528)

Circuit diagram for the CS42528 codec on the preamp board.

Preamp Board Schematics (NJW1194)

Circuit diagram for the NJW1194 volume control on the preamp board.

Preamp Board Schematics (TAS1020APFB)

Circuit diagram for the TAS1020APFB USB audio controller.

Troubleshooting

Troubleshooting Guide

Step-by-step guide to diagnose and resolve common product issues.

Circuit Diagrams

Preamp Circuit Diagrams (1/3)

Part 1 of 3 detailed circuit diagrams for the preamp section.

Preamp Circuit Diagrams (2/3)

Part 2 of 3 detailed circuit diagrams for the preamp section.

Preamp Circuit Diagrams (3/3)

Part 3 of 3 detailed circuit diagrams for the preamp section.

Board-Level Details

Connecting 2 Board

Details and connections for the Connecting 2 board.

Output Board

Details and schematics for the audio output board.

Sub Out Board

Details and schematics for the sub-out board.

Pot Board

Details and schematics for the potentiometer control board.

Trigger Board

Details and schematics for the trigger control board.

FPP Board

Details and schematics for the Front Panel Processor board.

Touch A Board

Details and schematics for the Touch A interface board.

Touch B Board

Details and schematics for the Touch B interface board.

PSU-1 Board

Details and schematics for Power Supply Unit 1.

PSU-2 Board

Details and schematics for Power Supply Unit 2.

PCB Layouts

Preamp and Connecting 2 Board Layouts

PCB layout views for Preamp and Connecting 2 boards.

Output Board Layouts

PCB layout views for the Output board.

Sub Out, Pot, and Headphone Board Layouts

PCB layout views for Sub Out, Pot, and Headphone boards.

Trigger and Connecting Board Layouts

PCB layout views for Trigger and Connecting boards.

FPP Board Layouts

PCB layout views for the FPP board.

Touch A and Touch B Board Layouts

PCB layout views for Touch A and Touch B boards.

PSU-1 Board Layouts

PCB layout views for the PSU-1 board.

PSU-2 Board Layouts

PCB layout views for the PSU-2 board.

Electrical Parts List

Diodes, Transistors, MOSFETs, Inductors

List of diodes, transistors, MOSFETs, and inductors with part details.

Resistors and Capacitors

Comprehensive list of resistors and capacitors with values.

Integrated Circuits (ICS)

List of integrated circuits with part numbers and descriptions.

Connectors, Transformers, Fuses, and Fasteners

List of connectors, transformers, fuses, and assembly fasteners.

Metal Parts and Packing

List of mechanical metal parts and packaging details.

Accessories

List of included product accessories.

Exploded Views

Mechanical Exploded View and Parts List

Visual breakdown and list of mechanical components.

Electrical Exploded View and Board Identification

Visual breakdown and identification of electrical assemblies.

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