AKG N90 User Manual

launaM ecivreS 09N GKA
Released by Global Quality, Rev.1.2, Jan./2016
1/1
SKU: N90QBLK
SKU: N90QGLD
CONTENTS
2
5
12
33
32
Safety Information
Set Block Diagram
Schematics Diagram
Accessories
SPECIFICATION
• Frequency response : 10-25kHz
• Sensitivity : 110dB SPL @ 1kHz/100mV
• Driver impedance : 32ohms
Disassembly Instruction
Mechanical Exploded View
Mech. & Elec. Parts List
10
31
Layout Diagram 21

AKG N90 Specifications

General

Brand	AKG
Model	N90
Category	Headphone
Language	English

Summary

Safety and Regulatory Information

General Safety Guidelines

Numbered instructions for safe product usage, including handling and environment.

Electrical Hazard Warnings

Warnings about electric shock, fire risks, and proper plug usage.

Electrostatic Discharge Sensitive Devices

Handling ES Devices Safely

Techniques to prevent damage from static electricity during handling.

Electrical Safety Testing

Leakage Current Check Procedure

Procedure and limits for checking AC leakage current for safety.

Disassembly Instructions

Initial Disassembly Steps

Steps 1-6 covering headphone disassembly and initial component separation.

Earcup and Board Removal

Steps 7-12 for removing earcups and internal PCBA boards.

Block Diagrams

IO Board Block Diagram

Diagram showing signal flow and component relationships on the IO board.

Main Board Block Diagram

Schematics

Main Board Schematics Overview

Detailed circuit diagram for DSP, Codec, and related components.

Main Board Power Schematics

Main Board MCU Schematics

IO Board Schematics

ANC Board Schematics

Mechanical Exploded View

Headband, Right, and Left Earphone Assembly Diagrams

Spare Parts List