Sony MZ-E900 specifications VchPWM, Assy11, OfstOK, VlPWM, Adj Ok

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MZ-E900

5-4-3. Vc PWM Duty (H) adjustment method

1.Set the Manual mode and set the item No. to 763. LCD display

763 VchPWM XX

2.Connect a digital voltmeter to TP901(VC) on the main board and adjust + key and – key on the remote control. Adjustment value:2.75V

Standard value:2.735 to 2.765V

MAIN BOARD (SIDE A)

R903

 

28

25

 

20

15

 

C905

29

 

 

 

 

 

14

 

30

 

 

IC901

 

 

R901

 

 

 

10 C918

C920

35

 

 

 

 

 

 

R920

 

 

 

 

 

 

 

 

 

 

 

 

 

5

R921

 

 

 

 

 

 

 

C919

40

 

 

 

 

 

 

 

42

 

 

 

 

 

1

 

 

43 45

 

 

50

55 56

 

C911

 

 

 

R950

C917

C915

 

 

 

 

 

 

R946

R948

TP901 (VC)

 

 

 

 

 

 

 

 

5-4-5.Electrical offset adjustment method

Note: Doing adjustment by the state that a disc does not enter.

1.Confirm the power voltage is 1.5V.

2.Set to the test mode.

3.Press the – key activates the overall adjustment mode. LCD display

000 Assy11

4.Press the DISPLAY key. LCD display

030 Ofst**

5.If result of electrical offset adjustment is OK,the following dis- play appears.

LCD display

030 OfstOK

5-5. OVERALL ADJUSTMENT MODE

5-5-1. Overall adjustment mode structure

digital voltmeter

TP901 (VC)

TEST MODE (Display Check Mode)

VOLUME – key

Overall Adjustment Title Display(ASSY**)

.key

CD overall Adjustment

xkey

3. Press X key to write the adjustment value.

5-4-4. Vl PWM Duty adjustment method

1.Set the Manual mode and set the item No. to 764. LCD display

764 VlPWM XX

2.Connect a digital voltmeter to TP917 (VL) on the main board and adjust + key and – key on the remote control. Adjustment value:2.23V

Standard value:2.22 to 2.235V

digital voltmeter

MAIN BOARD (SIDE A)

 

TP917

 

 

(VL)

 

TP917

 

 

(VL)

 

L903

D902

 

 

L902

C904

L904

3.Press X key to write the adjustment value. LCD display

000 ADJ OK

 

 

 

 

 

 

 

 

 

 

key

 

 

 

 

 

 

 

 

> N

 

 

key

 

 

 

 

 

 

x key

 

 

 

 

 

 

> N

MO overall

 

 

 

 

 

 

 

 

 

key

Adjustment

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

DISPLAY

Electrical offset

x key

 

 

 

 

 

 

 

 

 

 

key

Adjustment key

x key

 

 

 

 

 

 

 

 

PLAY MODE

Power Supply

 

 

 

 

 

 

 

 

 

 

Adjustment

 

 

 

 

 

 

 

 

 

 

 

 

 

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

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

1. Set the TEST MODE and press – key to set the Overall Ad- justment mode.

LCD display

000 Assy11

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

Automatic adjustments are made.

LCD display

XXXCD RUN

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

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Contents Specifications MZ-E900Section Servicing Note General Section Disassembly LID ASSY, UPPER, Holder AssyMechanism Deck Audio Board Bracket R AssyMain BOARD, Bracket L ASSY, SW Board Optical PICK-UP AssySection Test Mode Setting the Test ModeHow to set the Test Mode How to release the Test ModeManual 011 C68S01OFFJ01 011 063B01Clearing the error display code 001 1 Adrs000 P**P## 000 P**R00 000 EIB Stat Adrs BEmp 000 ######000 0F 000 FF 0FReset Res NV CCRes OK? 021 ResVchPWM Assy11Ofst OfstOKMO OK Resume CC043 Res Res ClrMZ-E900 Diagrams Block DiagramsSection Printed Wiring Boards Main /2 Refer to page 22 for NotesSemiconductor Location Main Board IC B/D Schematic Diagram Main /2 Printed Wiring Boards Audio Section Audio Board Side aSchematic Diagram Audio Section IC Block Diagrams WaveformsIC551 SC111257FCR2 IC901 XPC18A32FCR2 Exploded Views Main SectionMechanism Deck Section MT-MZE900-173 5961Section Electrical Parts List Audio MainCN501 1-794-772-21 CONNECTOR, FPC ZIF 20P MainMain SW Composition Circuit Block501 502 507 Revision History Ver Date Description of Revision

MZ-E900 specifications

The Sony MZ-E900, released in the early 2000s, represents a remarkable convergence of portable music technology and user-friendly design. As a MiniDisc player, the MZ-E900 was part of Sony's efforts to create a new standard in digital audio storage, allowing users to record, erase, and edit audio with unparalleled ease.

One of the standout features of the MZ-E900 is its compact and lightweight design, making it an ideal companion for music lovers on the go. Weighing in at approximately 150 grams, it is particularly portable and can easily fit into a pocket or bag. The sleek exterior is both stylish and functional, with an intuitive interface that facilitates easy navigation through a user-friendly menu.

Technologically, the MZ-E900 was equipped with Sony's ATRAC (Adaptive Transform Acoustic Coding) audio compression technology, which delivered impressive sound quality while minimizing file sizes. This allowed users to fit more music onto a single MiniDisc, which could hold up to 80 minutes of high-quality audio in LP2 mode. Additionally, the player supported 24-bit digital-to-analog conversion, ensuring a rich and detailed listening experience.

Another notable feature is the MZ-E900's ability to record audio directly from various sources, such as FM radio or external devices, thanks to an integrated microphone and line-in capabilities. The unit also supported a range of playback modes, including shuffle and repeat functions, giving users greater flexibility in how they enjoy their music.

The MZ-E900 also boasted an impressive battery life, with the ability to play up to 40 hours on a single AA battery, making it perfect for long journeys or extended listening sessions. The inclusion of an ergonomic remote control further enhanced the user experience, allowing for convenient operation while on the move.

In terms of connectivity, the device included a small but versatile digital output, enabling users to connect to other audio equipment such as amplifiers or sound systems. This feature contributed to the versatility of the MZ-E900, allowing it to serve not just as a portable player, but as a component in a larger audio setup.

Overall, the Sony MZ-E900 stood out for its combination of portability, sound quality, and innovative features, making it a beloved device among audiophiles and casual listeners alike during its time. Its legacy remains a testament to Sony's commitment to advancing portable audio technology.