SECTION 5

ELECTRICAL ADJUSTMENTS

5-1. GENERAL

In this set, CD and MO discs can be automatically adjusted by set- ting the Overall Adjustment mode within the TEST MODE, Before performing these automatic adjustments, it is necessary to clear the memory and adjust the power in the Manual mode.

5-2. NOTES FOR ADJUSTMENT

5-2-1. Jigs

 

CD disc

TDYS-1 (part code: 4-963-646-01)

MO disc

PTDM-1 (part code: J-2501-054-A)

 

 

or commercially available MO disc (recorded)

Digital voltmeter

5-2-2. Adjustment sequence

The adjustments should be always performed in the following sequence:

1 Reset NV (Clear the memory) Manual mode

2Overall CD adjustments

Overall adjustment mode

3Overall MO adjustments

5-2-3. Power

A stablized power supply is used to supply 1.5 V DC to the battery terminal.

Otherwise, an AA alkali battery with the remaining level of 1.5 V DC or more is used. (In this case, make sure that the battery indication on the remote control is “FULL”)

5-3. RESET NV

5-3-1. How to reset NV

1.Set the TEST MODE. (See page 10)

2.Set the Manual mode and set the item No. 021, Reset NV. LCD display

021AAASCC

3.Press X key on the remote control. LCD display

021AAASCC

Note: CC is blink.

4.Press X key on the remote control again. LCD display

021AAASCC

Note: CC blink. t Finish the CC light on.

5.Press x key to terminate the Manual mode and return to the

TEST MODE.

5-4. OVERALL ADJUSTMENT MODE

5-4-1. Overall adjustment mode structure

Overall Adjustment Mode

.key

Overall CD Adjustment

xkey

. key > N key

>N key

Overall MO Adjustment

xkey

Note: The overall adjustments should be always performed in the sequence of CD t MD adjustments.

5-4-2. Overall CD and MO adjustment method

1.Set the TEST MODE (see page 10) and press – key to set the Overall Adjustment mode.

LCD display

044 Assy ?

2.Insert CD disc in the set, and press . key to set the Overall CD Adjustment mode.

Automatic adjustments are made.

LCD display

 

Display on Adjustment state

 

 

for Each Items.

 

 

XXXXXXSXX

XXX:Item No. for which an adjustment is being executed.

3.If NG in the overall CD adjustments, return to Reset NV and perform the adjustment again.

LCD display

 

Adjustment Value becomed to NG.

 

XXXNGXX

XXX:NG item No.

4.If OK through the overall CD adjustments, then perform overall MO adjustments.

LCD display

XXXEnd-OK

5.Insert MO disc in the set, and press > N key to set the Overall MO Adjustment mode. Automatic adjustments are made.

LCD display

XXXXXXSXX

XXX: Item No. for which an adjustment is being executed.

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Sony MZ-E90 service manual Section Electrical Adjustments, Reset NV

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.