Sony MZ-E90 service manual Flexible Circuit Board Repairing, Mass

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Dimensions

Approx. 81 25 74 mm (w/h/d)

(3 1/4 1 3 in.) not including projecting parts and controls

Mass

Approx. 95 g (3.4 oz.) the player only

Approx. 136 g (4.8 oz.) incl. a premastered MD and a LR6 (size AA) alkaline battery Supplied accessories

Headphones with a remote control (1) Carrying pouch (1)

Design and specifications are subject to change without notice.

Precautions for Laser Diode Emission Check

When checking the emission of the laser diode during adjust- ments, never view directly downwards as this may lead to blindness.

Precautions for Using Optical Pick-up (LCX-2E)

As the laser diode inside the optical pick-up damages by static electricity easily, solder the laser tap of the Optical pick-up flexible board when handling. Also take the necessary measures to prevent damages by static electricity. Handle the Optical pick- up flexible board with care as it breaks easily.

This MiniDisc player is classi- fied as a CLASS 1 LASER product.

The CLASS 1 LASER PRODUCT label is located on the bottom exterior.

IN NO EVENT SHALL SELLER BE

LIABLE FOR ANY DIRECT,

INCIDENTAL OR CONSEQUENTIAL

DAMAGES OF ANY NATURE, OR

LOSSES OR EXPENSES RESULTING

FROM ANY DEFECTIVE PRODUCT

OR THE USE OF ANY PRODUCT.

“MD WALKMAN” is a trademark of Sony Corporation.

CAUTION

Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure.

Flexible Circuit Board Repairing

Keep the temperature of the soldering iron around 270°C during repairing.

Do not touch the soldering iron on the same conductor of the circuit board (within 3 times).

Be careful not to apply force on the conductor when soldering or unsoldering.

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.

Laser tap

Optical Pick-up flexible board

SAFETY-RELATED COMPONENT WARNING!!

COMPONENTS IDENTIFIED BY MARK 0OR DOTTED LINE WITH MARK 0 ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS

LIST ARE CRITICAL TO SAFE OPERATION.

REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY.

ATTENTION AU COMPOSANT AYANT RAPPORT

À LA SÉCURITÉ!!

LES COMPOSANTS IDENTIFIÉS PAR UNE MARQUE 0SUR LES

DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT. NE REMPLACER CES COMPOSANTS QUE PAR DES PIÈCES SONY DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU DANS LES SUPPLÉMENTS PUBLIÉS PAR SONY.

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Contents Specifications LCX-2EFlexible Circuit Board Repairing MassTable of Contents Section Servicing Note General Page Holder Assy Section DisassemblyPanel ASSY, Upper Mechanism Deck Main BoardService ASSY, OP Test Mode Structure Test ModeSetting the Test Mode GeneralHow to set the Manual mode Manual ModeOverall Adjustment Mode Section Electrical Adjustments Reset NVOverall CD and MO adjustment items Overall CD adjustment items1. IC801 RU6915MF-0006 System Control Section DiagramsIC PIN Description Pin NoPin No Pin Name Description SLD VconServo Block Diagrams MD Block DiagramMain Board 1/2 MD Section SERVO, System Control Block Diagram Main Board 2/2L903 L902 Q901Q907 Q903Waveforms Modeplay OPEN/CLOSE Total Current Modeplay IC801 qj XINIC302 AK4352VT-E2 IC Block DiagramsIC501 SN761056DBT IC601 UPD63731GC-9EUIC552 IC602 MN41X17400CTT-10T1IC903 S-8328E20MC-EYA-T2 IC803IC551 IC802Section Exploded Views Main Unit SectionSPRING, Rack Service ASSY, OP LCX-2EMechanism Deck Section MT-MZE60-169 Section Electrical Parts List Main Diode UDZ-TE-17-5.1B DiodeDiode UDZ-TE-17-2.4B LED TLSU1002TPX1,SONY OperateSWITCH, KEY Board SwitchSWITCH, KEY Board N SWITCH, Slide AvlsSony 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.