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NAD C740 Service Manual

NAD C740
27 pages
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NAD C740 Specifications

Power Output IconPower Output
continuous average power output into 8Ω35W
clipping power (max continuous power per channel)40W
IHF dynamic power at 8Ω50W
IHF dynamic power at 4Ω90W
IHF dynamic power at 2Ω140W
Tuner Specifications IconTuner Specifications
usable input sensitivity FM Mono11.2 dBf
usable input sensitivity FM Stereo17.2 dBf
50 dB quieting sensitivity FM Mono16.1 dBf
50 dB quieting sensitivity FM Stereo36.1 dBf
capture ratio (FM)2.5 dB
harmonic distortion FM Mono0.1%
harmonic distortion FM Stereo0.15%
channel separation @1kHz>45dB
frequency response± 1.5 dB 30Hz - 15 kHz
AM Tuner Specifications IconAM Tuner Specifications
usable sensitivity10 mV
selectivity30 dB
IF rejection40 dB
signal / noise ratio40 dB
harmonic distortion0.7%
Weight and Dimensions IconWeight and Dimensions
dimensions (W x H x D)17.125" x 3.375" x 11.5" (435 x 110 x 290mm)
net weight17.8lbs (8.1kg)
shipping weight20lbs (9.1kg)

Summary

Service Safety Precautions

Replacing the fuses

Guidelines for replacing fuses with correct types for fire and shock prevention.

Safety Check Out

Procedures for ensuring insulation and safety before returning the unit to customers.

Front Panel Controls

Front Panel Control Identification

Identification and function of all controls on the front panel of the receiver.

Rear Panel Connections

Rear Panel Connection Ports

Illustration and labeling of all input/output terminals on the rear panel.

Instrument Connection for Alignment

Alignment Setup Diagrams

Block diagrams showing instrument connections for FM and AM alignment procedures.

Alignment Procedures

FM and AM Alignment Steps

Detailed steps for aligning the FM and AM tuner sections using signal generators.

Power Amplifier Adjustment

Procedure for adjusting idle current and offset voltage in the power amplifier stage.

Specifications

PCB Layouts

Schematic Diagrams

Microprocessor Connection Diagram

Microprocessor Terminal Functions

Detailed pin description and terminal functions for the microprocessor.

IC Block Diagrams

RF Section Block Diagram

AF Section Block Diagram

Exploded View

Exploded View Parts List

Wiring Diagram

Electrical Parts List

Packing Diagram

Packing Parts List

Running Change Information

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