Sony MZ-R50 service manual Test Mode

Page 25

SECTION 4 TEST MODE

[Outline]

The general adjustment mode of this unit performs CD and MO adjustments automatically when set. In this mode, the disc is de- termined if CD or MO and adjustments are automatically per- formed in order. If errors are detected , the faulty locations are displayed. The servo mode performs each adjustment automati- cally.

[Setting the Test Mode]

Short-circuit the soldering bridge of TAP803 (TEST) on the main board (connect Pin of IC801 to the GND) and turn on the power supply.

[MAIN BOARD] (SIDE B)

C315

26 TAP803 (TEST)

25

[Operations When Test Mode is Set]

When the test mode is set, the LCD will display as follows.

Self-diagnostic display

(displayed while the DISPLAY key is pressed)

 

 

00

Segment section

 

 

Ver

01.00

Dot section

ROM version displayed

The LCD performs the following repeatedly. ROM version displayed /all lit /all off

The display can be held and checked by pressing P key.

The self-diagnostic display appears while the DISPLAY key is pressed.

[Structure of Test Mode]

The test mode of this unit consists of the following five modes.

IC801

1

100

TAP803 (Test mode)

Short : Test mode

Open : Normal mode

[Exiting the Test Mode]

Turn off the power supply and open the soldering bridge of TAP803 (TEST) on the main board.

Display when Test Mode is Set

+key

pkey

=key

Servo Mode

Segment Section : 00

Dot Section : SERVO

Audio Mode

Segment Section : 00

Dot Section : AUDIO

Mecha Mode

Segment Section : 00 00

Dot Section : MECHA

Select dial number (blinks)

Power Mode

Segment Section : 00

Dot Section : POWER

General Adjustment Mode

Segment Section : 4000

Dot Section : Assy MODE

VOLUME +key or – key

In modes other than the general adjustment mode, the last two digits of the mode number will be displayed at the 00 section.

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Contents NEW SpecificationsDisassembly Table of ContentsDiagrams GeneralSection Servicing Note General Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Upper Panel ASSY, Bottom Panel Assy Removal Section DisassemblyMechanism Deck MT-MZR50-143 Removal Main Board RemovalCLV Board Removal Optical PICK-UP ASSY, REC Board RemovalPower BOARD, Switch Board Removal Battery Case Assy RemovalSwitch Unit with JOG Dial Removal Test Mode Structure of Servo Mode Servo ModeVolume Cluster Display Adjusting MethodStructuer of Audio Mode Audio ModeStructure of Mecha Mode Mecha ModePower supply Mode Structure of Power Supply ModeStructure of General Adjustment Mode General Adjustment ModeSide a Section AdjustmentsSide B Laser Power Check Low Reflection CD Traverse Adjustment Adjustment Location Pin No Pin name Description Section DiagramsAvss IC801 System Control CXP81960M-652R KEY3 Circuit Boards Location Block DiagramMIC Refer to page 61 for IC Block Diagram Schematic Diagram Main 1/3 SectionWaveforms Refer to page 62 for IC Block Diagrams Schematic Diagram Main 2/3 SectionRefer to page 64 for IC Block Diagrams Schematic Diagram Main 3/3 SectionIC Block Diagrams Main 1/3 Section IC501 CXA2523AR-T4 IC506 MPC18A20VM IC Block Diagrams Main 2/3 Section IC804 DS1302ZIC806 MB3800PNF IC807 AK93C45AV-L IC802 RS5RJ29261IC Block Diagram Main 3/3 Section IC303 AK4515-VQ Upper PANEL, Bottom Panel Section Section Exploded Views55 A-3293-758-A Power BOARD, Complete 53 A-3293-759-A Switch BOARD, CompleteChassis Section 75 4-997-493-01 Spring LOCK,COMPRESSION124 4-972-546-01 Spring Worm GEAR,COMPRESSION Mechanism Deck SectionMotor Spindle CLV Main Section Electrical Parts ListTantalum MainDiode ELEMENT, StorageFerrite Bead Inductor 0UHExcept FR RES,CHIPMain Power Power REC Switch Sony Corporation
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MZ-R50 specifications

The Sony MZ-R50, launched in the late 1990s, is a notable model in the MiniDisc player genre, which revolutionized how consumers listened to music. Part of Sony's first generation of MiniDisc recorders, the MZ-R50 quickly gained popularity for its sleek design and innovative features.

One of the standout features of the MZ-R50 is its compact size and lightweight construction. It weighs just 160 grams, making it one of the most portable audio devices of its time. This portability paired with a stylish aesthetic allowed users to carry their music with ease, appealing to young, active lifestyles.

The MZ-R50 utilizes MiniDisc technology, which employs a small, flat disc encased in a protective shell. This format offers superior sound quality compared to cassette tapes, allowing for digital recording and playback. Users can record audio directly onto the disc in real-time or transfer music from CDs with ease. The player supports several recording modes, including LP2 and LP4, which allow users to maximize recording time without sacrificing quality.

Another significant feature of the MZ-R50 is its impressive battery life. It can run for up to 10 hours on a single charge, enabling long listening sessions without frequent recharging. The device also includes a digital pitch control, allowing users to change the tempo of tracks without affecting the pitch, which is especially useful for musicians and DJs.

Moreover, the MZ-R50 incorporates Sony's ATRAC (Adaptive Transform Acoustic Coding) compression technology. This advanced algorithm was designed to reduce the file size of audio while maintaining high sound fidelity, ensuring that music stored on MiniDiscs sounded close to the original recording. The player is compatible with both standard and long-play MiniDiscs, providing flexibility for users who want to store more music on a single disc.

In terms of connectivity, the MZ-R50 features an optical input for high-quality digital recording from other devices, along with a headphone output and a line out option for connecting to external speakers or audio systems. Its user-friendly interface allows for easy navigation through tracks and playlists, making it accessible for users of all ages.

Overall, the Sony MZ-R50 remains a beloved piece of audio technology, reflecting a unique combination of portability, sound quality, and user-friendly features, establishing its place in the history of personal music players. Its legacy continues to inspire later generations of audio enthusiasts.