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NAD 7020e Service Manual

NAD 7020e
22 pages
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SERVICE
MANUAL

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NAD 7020e Specifications

General IconGeneral
Tuning RangeFM, MW
Frequency Response20Hz - 20kHz
Input Sensitivity2.5mV (MM), 150mV (line)
Speaker Load Impedance4Ω to 16Ω
Power Output20 watts per channel into 8Ω (stereo)

Summary

Front and Rear Panel Interfaces

Rear Panel Connections

Identifies and describes rear panel inputs, outputs, and terminals for connectivity.

Front Panel Controls

Identifies and describes front panel controls, buttons, and indicators.

Technical Specifications

Power Amplifier Specifications

Detailed technical performance data for the power amplifier section.

Preamplifier Specifications

Technical details for the preamplifier, including phono and high-level inputs.

FM Tuner Specifications

Technical performance data for the FM tuner section.

Physical and Electrical Specifications

Dimensions, weight, power consumption, and power supply details.

Audio Section Alignment

Initial Adjustment Procedure

Steps for initial calibration of center voltage and idling current.

Final Adjustment Procedure

Steps for final calibration after initial adjustments.

FM Alignment Procedures

Necessary Instrumentation for FM Alignment

Lists test equipment required for FM tuning and alignment.

Tuning Voltage (Oscillator) Adjustment

Procedure to check and adjust the oscillator tuning voltage.

RF Tracking Alignment

Method for aligning RF tracking across frequencies.

FM Detector and MPX Alignment

Detector Coarse and Final Alignment

Steps for coarse and final calibration of the FM detector.

Autosearch Level Adjustment

Procedure to set the level for the autosearch function.

Stereo Decoder and MPX Filter Adjustments

Calibration of stereo decoding and MPX filters.

FM Stereo Separation and MPX Filter Tuning

Stereo Separation Adjustment

Method to adjust stereo separation for optimal output.

MPX Filter Adjustment

Procedure for tuning the MPX filter for minimum output.

AM Alignment Procedures

AM Oscillator (OSC) Adjustment

Procedure to adjust the AM oscillator circuit.

AM Intermediate Frequency (IF) Adjustment

Steps for aligning the AM intermediate frequency stages.

AM Tracking Adjustment

Method for aligning the AM tuner's tracking.

Amplifier PCB Layout and Wiring Diagram

Amplifier PCB Layout Diagram

Amplifier PCB Component Layout

Amplifier Schematic Diagram

Tuner PCB Layout

Tuner Circuit Diagram

Parts List

Exploded View

Packing Diagram

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