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NAD T748 User Manual

NAD T748
122 pages
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LAUNAMECIVRES
AV Surround Sound Receiver
T748
AV Surround Sound Receiver
T748
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NAD T748 Specifications

General IconGeneral
Frequency range20 - 20000 Hz
Input sensitivity250 mV
Audio output channels- channels
Signal-to-Noise Ratio (SNR)100 dB
Total Harmonic Distortion (THD)0.08 %
Dynamic power per channel (4 Ohm)160 W
Dynamic power per channel (8 Ohm)110 W
Power output per channel (20-20KHz@8 Ohm)80 W
HDMI in4
Line-inYes
Audio (L/R) in3
Composite video in2
S-Video inputs quantity1
Connectivity technologyWired
Speakers connectivity typeBinding post
Ethernet LANNo
AM band range520 - 1710 kHz
FM band range87.5 - 108 MHz
Supported radio bandsAM, DAB+, FM
Display-
Product colorBlack
Apple docking compatibilityNot supported
Sustainability certificatesENERGY STAR
AC input voltage120 V
AC input frequency60 Hz
Power consumption (standby)0.5 W
Power consumption (typical)50 W
Package weight14000 g
Weight and Dimensions IconWeight and Dimensions
Depth387 mm
Width435 mm
Height167 mm
Weight11500 g

Summary

Section 1 Summary

Product Safety Servicing Guidelines

Essential guidelines for safe and correct product servicing and handling.

Servicing Precautions

Important safety measures and procedures to follow during service.

Specifications

Detailed technical data and performance characteristics of the AV receiver.

Disassembly

Procedures and instructions for taking the unit apart for servicing.

Principal Part Location

Identifies the main internal components and their positions within the unit.

Exploded View

Visual breakdown of the unit's parts and their assembly order.

IC Block Diagrams and Pin Descriptions

IC101: STM32F103ZET6 (FLASH MCU)

Block diagram and pinout for the STM32F103ZET6 microcontroller.

IC301: R2A15218FP (INPUT SELECTOR TONE CONTROL)

Block diagram and pin configuration for the R2A15218FP IC.

IC211: MX29LV32DTTI - 70G (FLASH OF DSP)

Block diagram and pin description for the MX29LV32DTTI flash memory.

IC201: TMS320DA788B (AUDIO DSP)

Device block diagram for the TMS320DA788B audio DSP.

IC299: CS42528-CQ (TYPICAL CONNECTION DIAGRAM)

Typical connection diagram and pin description for the CS42528 CODEC.

IC451: NJW1321FP1C (PIN CONFIGURATION)

Pin configuration for the NJW1321FP1C IC.

IC912: A3V64S40ETP-G6 (HDMI / DDR SDRAM)

Pin function and description for the A3V64S40ETP-G6 SDRAM.

IC915: ADV7511KSTZ (HDMI 1.4TX)

Pin and package information for the ADV7511KSTZ HDMI transmitter.

IC911: ADV7844KBCZ (HDMI Processor & ADC & DECODER)

Pin configuration and function descriptions for the ADV7844KBCZ IC.

IC951: TPS65251RHAR (PIN CONFIGURATION)

Pin out diagram for the TPS65251RHAR power management IC.

IC913, IC918: TC74VCX541FT (OCTAL BUS BUFFER)

Pin assignment and logic symbol for the TC74VCX541FT bus buffer.

IC332: AZ4580M (DUAL LOW NOISE OPERATIONAL AMPLIFIERS)

Pin configuration and description for the AZ4580M operational amplifier.

IC407: ST3232ECDR (RS-232 DRIVERS & RECEIVERS)

Pin connection and pin description for the ST3232ECDR RS-232 transceiver.

System Schematics and Board Layouts

Wiring Diagram and Front PCB Schematic

Overall wiring connections and the schematic for the front board.

MCU, DSP, Audio, and DAB Schematics

Schematics for MCU, DSP, Audio, and DAB sections.

Power, Video, HDMI, and Amplifier Schematics

Schematics for power, video, HDMI, and amplifier circuits.

Main, Sub, and Pre-Amp PCB Schematics

Schematics for the main, sub, and pre-amplifier boards.

PCB Layouts (Top and Bottom Views)

Visual layouts of the front, input, main, sub, and HDMI circuit boards.

Troubleshooting Guides

HDMI Part Troubleshooting

Step-by-step guide for diagnosing and resolving HDMI section issues.

Audio Part Troubleshooting

Guide for troubleshooting audio output problems in digital and analog paths.

Display Part Troubleshooting

Procedures for diagnosing issues with the unit's LED indicators and VFD display.

Electrical Parts List

Resistor and Capacitor Numbering Systems

Explanation of part numbering conventions for resistors and capacitors.

Component Part Number Details

Comprehensive list of part numbers, descriptions, and specifications for components.

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