MDR-IF4000

Notes on chip component replacement

•Never reuse a disconnected chip component.

•Notice that the minus side of a tantalum capacitor may be damaged by heat.

Unleaded solder

Boards requiring use of unleaded solder are printed with the lead free mark (LF) indicating the solder contains no lead.

(Caution: Some printed circuit boards may not come printed with the lead free mark due to their particular size.)

: LEAD FREE MARK

Unleaded solder has the following characteristics.

•Unleaded solder melts at a temperature about 40°C higher than ordinary solder.

Ordinary soldering irons can be used but the iron tip has to be applied to the solder joint for a slightly longer time.

Soldering irons using a temperature regulator should be set to about 350°C.

Caution: The printed pattern (copper foil) may peel away if the heated tip is applied for too long, so be careful!

•Strong viscosity

Unleaded solder is more viscous (sticky, less prone to flow) than ordinary solder so use caution not to let solder bridges occur such as on IC pins, etc.

•Usable with ordinary solder

It is best to use only unleaded solder but unleaded solder may also be added to ordinary solder.

•Repaier DP-IF4000 with MDR-IF4000.

TABLE OF CONTENTS

 

Specifications

1

1. GENERAL

3

2.DISASSEMBLY

2-1.

Disassembly Flow

4

2-2.

Front Plate (R) Assy

4

2-3.

RX Board

5

2-4.

Hunger (R)

5

2-5.

Wiring On The Right Side

6

2-6.

Front Plate (L) Assy

6

2-7.

Batt Board

7

2-8.

Hanger (L)

7

2-9.

Wiring On The Left Side

8

2-10.

Hunger Lid (L)

8

2-11.

Wiring On The SW Board

9

2-12.

How To Hang The Tension Spring

9

3.DIAGRAMS

3-1.

Circuit Boards Location

10

3-2.

Block Diagrams

11

3-3. Printed Wiring Board – Receiver Section –

12

3-4.

Printed Wiring Board – Power Section –

13

3-5.

Schematic Diagram – Receiver Section –

14

4.EXPLODED VIEWS

4-1.

Housing (L) Assy Section

17

4-2.

Housing (R) Assy Section

18

5.

ELECTRICAL PARTS LIST

19

2

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Sony MDR-IF4000 service manual Table of Contents, Disassembly, Diagrams, Exploded Views
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MDR-IF4000 specifications

The Sony MDR-IF4000 is a remarkable over-ear wireless headphone solution that excels in delivering high-quality audio and user convenience. Designed for both home and studio use, these headphones incorporate Sony's advanced audio technologies to provide an immersive listening experience.

One of the standout features of the MDR-IF4000 is its infrared wireless transmission system. This technology allows users to enjoy music and other audio without the hassle of wired connections. The infrared signal provides a reliable and interference-free connection, ensuring consistent audio quality up to a distance of approximately 30 meters, depending on the environment. This level of freedom is perfect for those who want to move around while listening to their favorite tracks or watching movies.

Audio quality is another key highlight of the MDR-IF4000. Utilizing large 40mm neodymium drivers, these headphones deliver rich, clear sound with impressive bass response. The frequency response range spans from 20 Hz to 20 kHz, which means users can experience a wide range of sounds, from deep lows to sparkling highs. This broad frequency range is essential for those who demand fidelity in their audio playback, whether it’s for music, movies, or gaming.

Comfort is also a focal point in the design of the MDR-IF4000. The headphones feature plush ear cushions that provide a snug yet comfortable fit, making them ideal for extended listening sessions. The adjustable headband ensures that users can find their perfect fit, enhancing the overall experience.

Moreover, these headphones come equipped with an automatic power-off feature that conserves battery life when the headphones are not in use. The included rechargeable battery can provide hours of uninterrupted listening, making the MDR-IF4000 a practical choice for daily use.

The MDR-IF4000 is compatible with various audio sources. It includes an infrared transmitter that can easily connect to televisions, receivers, and other devices, ensuring versatility for all kinds of audio playback. This seamless connectivity presents an ideal solution for movie enthusiasts and audiophiles alike.

In summary, the Sony MDR-IF4000 headphones stand out for their wireless convenience, impressive audio quality, comfortable design, and versatile compatibility. Whether you are enjoying a movie at home or listening to your favorite music, these headphones are built to enhance your audio experience without the restrictions of traditional wired options.
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