Sony MZ-E90 service manual Table of Contents

Page 3

TABLE OF CONTENTS

1.

SERVICING NOTE

4

2.

GENERAL

5

 

Playing an MD right away!

5

3.

DISASSEMBLY

7

3-1. Panel Assy, Upper

7

3-2. Holder Assy

7

3-3. Mechanism Deck

8

3-4. Main Board

8

3-5. Service Assy, OP

9

4.

TEST MODE

10

4-1. General

10

4-2. Setting the Test Mode

10

 

4-2-1. How to Set the Test Mode

10

 

4-2-2. Operations when the Test Mode is Set

10

 

4-2-3. How to Release the Test Mode

10

4-3. Test Mode Structure

10

4-4. Manual Mode

11

 

4-4-1. Outline of the Function

11

 

4-4-2. How to Set the Manual Mode

11

4-5. Overall Adjustment Mode

11

 

4-5-1. Outline of the Function

11

5.

ELECTRICAL ADJUSTMENTS

12

5-1. General

12

5-2. Notes for Adjustment

12

 

5-2-1. Jigs

12

 

5-2-2. Adjustment Sequence

12

 

5-2-3. Power

12

5-3. Reset NV

12

 

5-3-1. How to Reset NV

12

5-4. Overall Adjustment Mode

12

 

5-4-1. Overall Adjustment Mode Structure

12

 

5-4-2. Overall CD and MO Adjustment Method

12

 

5-4-3. Overall CD and MO Adjustment Items

13

6.

 

DIAGRAMS

14

6-1. IC Pin Description

14

 

6-1-1. IC801 RU6915MF-0006 (System Control)

14

6-2. Block Diagrams

17

 

6-2-1. MD Block Diagram

17

 

6-2-2. Servo, System Control Block Diagram

19

6-3.

Printed Wiring Boards and Schematic Diagrams

21

 

6-3-1. Printed Wiring Board – Main Board –

21

 

6-3-2.

Schematic Diagram – Main Board (1/4) –

25

 

6-3-3.

Schematic Diagram – Main Board (2/4) –

27

 

6-3-4.

Schematic Diagram – Main Board (3/4) –

29

 

6-3-5.

Schematic Diagram – Main Board (4/4) –

31

6-4.

IC Block Diagrams

33

7.

 

EXPLODED VIEWS

37

7-1.

Main Unit Section

37

7-2.

Mechanism Deck Section

38

8.

 

ELECTRICAL PARTS LIST

39

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Contents LCX-2E SpecificationsMass Flexible Circuit Board RepairingTable of Contents Section Servicing Note General Page Section Disassembly Panel ASSY, UpperHolder Assy Main Board Mechanism DeckService ASSY, OP General Test ModeSetting the Test Mode Test Mode StructureManual Mode Overall Adjustment ModeHow to set the Manual mode Reset NV Section Electrical AdjustmentsOverall CD adjustment items Overall CD and MO adjustment itemsPin No Section DiagramsIC PIN Description 1. IC801 RU6915MF-0006 System ControlSLD Vcon Pin No Pin Name DescriptionBlock Diagrams MD Block Diagram Main Board 1/2 MD SectionServo Main Board 2/2 SERVO, System Control Block DiagramL903 Q903 Q901Q907 L902Waveforms Modeplay OPEN/CLOSE Total Current IC801 qj XIN ModeplayIC601 UPD63731GC-9EU IC Block DiagramsIC501 SN761056DBT IC302 AK4352VT-E2IC803 IC602 MN41X17400CTT-10T1IC903 S-8328E20MC-EYA-T2 IC552IC802 IC551Main Unit Section Section Exploded ViewsService ASSY, OP LCX-2E Mechanism Deck Section MT-MZE60-169SPRING, Rack Section Electrical Parts List Main LED TLSU1002TPX1,SONY Operate DiodeDiode UDZ-TE-17-2.4B Diode UDZ-TE-17-5.1BSWITCH, Slide Avls SwitchSWITCH, KEY Board N SWITCH, KEY BoardSony Corporation

MZ-E90 specifications

The Sony MZ-E90 is a notable portable mini-disc player, emblematic of early 2000s technology that revolutionized how music was consumed. Launched during a time when CDs and cassette tapes were dominant, the MZ-E90 provided a compact solution for digital audio playback, embodying Sony's commitment to audio quality and portability.

One of the standout features of the MZ-E90 is its ability to record audio in real-time. Users can easily create their own mini-discs by recording tracks directly from a CD, vinyl, or even from the radio. This flexibility allowed music enthusiasts to curate personalized playlists on a single medium, which was a significant advantage over traditional physical formats.

The player utilizes Sony's ATRAC (Adaptive TRAnsform Acoustic Coding) compression technology, which enables high-quality sound reproduction in a space-efficient manner. The MZ-E90 supports MDLP (MiniDisc Long Play) mode, allowing users to store multiple albums on a single disc. This capability enhanced its appeal, especially for those with extensive music collections.

In terms of design, the MZ-E90 is compact and lightweight, making it easy to transport. The player features a user-friendly interface, equipped with a backlit LCD display that shows track information and playback status. The controls are intuitive, allowing users to navigate through their music selections effortlessly.

Battery life is another crucial aspect of the MZ-E90, offering long playback hours thanks to its efficient power management. This aspect made it a preferable choice for those on the go, as it ensured that users could enjoy their music for extended periods without frequent recharging.

Moreover, the MZ-E90 includes a headphone jack for private listening and features an integrated bass boost function that augments low-frequency sounds, enhancing the listening experience for those who enjoy richer audio. The use of high-quality components further ensures that the sound reproduction does justice to the original recordings.

While the Sony MZ-E90 may not have the mainstream recognition of today’s streaming platforms, it played a pivotal role in advancing portable digital music technology. Its combination of recording capabilities, sound quality, and portability made it a cherished device for audiophiles and casual listeners alike during its production run. The legacy of such devices remains evident in the evolution of portable music, paving the way for modern digital audio players and streaming services.
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