Sony MZ-E90 service manual Waveforms Modeplay

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MZ-E60

6-3-2. SCHEMATIC DIAGRAM — MAIN BOARD (1/4) — • Refer to page 33 for IC Block Diagrams.

(Page

27)

(Page

31)

(Page 29)

Note:

•All capacitors are in µF unless otherwise noted. pF: µµF 50 WV or less are not indicated except for electrolytics and tantalums.

•All resistors are in Ω and 1/4 W or less unless otherwise specified.

Note:

Note:

The components identi-

Les composants identifiés par

fied by mark 0or dotted

une marque 0sont critiques

line with mark 0are criti-

pour la sécurité.

cal for safety.

Ne les remplacer que par une

Replace only with part

piéce portant le numéro

number specified.

spécifié.

 

 

•A: B+ Line.

•Power voltage is dc 1.5V and fed with regulated dc power supply from battery terminal.

•Voltage and waveforms are dc with respect to ground under no-signal conditions.

no mark : PB

∗: Impossible to measure

•Voltages are taken with a VOM (Input impedance 10 MΩ ). Voltage variations may be noted due to normal produc- tion tolerances.

•Waveforms are taken with a oscilloscope.

Voltage variations may be noted due to normal produc- tion tolerances.

•Circled numbers refer to waveforms.

•Signal path. F : PB

•Waveforms (MODE:PLAY)

1 100mV/div 5∝ s/div

2

0.5V/div 5∝ s/div

3 5mV/div 1∝ s/div

4

5mV/div 1∝ s/div

Approx.

 

Approx.

Approx.

 

Approx.

180mVp-p

 

0.8Vp-p

10mVp-p

 

12mVp-p

 

 

 

 

IC501 7890

IC501 ed (RF OUT) (TP528)

IC501 r; (FE) (TP525)

 

IC501 rf (TE) (TP523)

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– 26 –

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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 Setting the Test ModeTest Mode Structure GeneralHow to set the Manual mode Manual ModeOverall Adjustment Mode Section Electrical Adjustments Reset NVOverall CD and MO adjustment items Overall CD adjustment itemsSection Diagrams IC PIN Description1. IC801 RU6915MF-0006 System Control 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 Q901 Q907L902 Q903Waveforms Modeplay OPEN/CLOSE Total Current Modeplay IC801 qj XINIC Block Diagrams IC501 SN761056DBTIC302 AK4352VT-E2 IC601 UPD63731GC-9EUIC602 MN41X17400CTT-10T1 IC903 S-8328E20MC-EYA-T2IC552 IC803IC551 IC802Section Exploded Views Main Unit SectionSPRING, Rack Service ASSY, OP LCX-2EMechanism Deck Section MT-MZE60-169 Section Electrical Parts List Main Diode Diode UDZ-TE-17-2.4BDiode UDZ-TE-17-5.1B LED TLSU1002TPX1,SONY OperateSwitch SWITCH, KEY Board NSWITCH, KEY Board 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.
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