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Sony MZ-N510


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Comments to date: 2. Page 1 of 1. Average Rating:
DrDew14 2:36pm on Wednesday, June 30th, 2010 
Very good buy, would definitely recommend it I bought this and then wondered whether an MP3 player might have been the better option.
Randall 10:31am on Sunday, June 13th, 2010 
sony MD player I have to say that when I first got this mini disc player I wasnt too thrilled, I wanted an MP3 player.

Comments posted on are solely the views and opinions of the people posting them and do not necessarily reflect the views or opinions of us.




Cue to the current track or the previous track Cue to the next track Go backwards or forward while playing
Search for a specific Press and hold. or > position while viewing while pausing. a elapsed time (Time Search) Search for a specific track while viewing track numbers (Index Search) Cue to the beginning of the every 10th track (only during playback of the disc with no group settings1)) Remove the MD

1) For

Press and hold. or > while the recorder is stopped.
Press GROUP, and then press. or >.

+ or button.

Press x and open the lid.2)
Press x and open the lid.
more details, see Using the group function (page 43). 2) Once you open the lid, the point to start play will change to the beginning of the first track.
If the play does not start
Make sure the recorder is not locked (pages 12, 16).
The playback sound may skip if: the recorder receives stronger continuous shock. a dirty or scratched MD is played.
Various ways of recording
Viewing various information
You can check the remaining time, track number, etc. when recording or during stop. Group-related items appear only when a track with group settings is played and then stopped.
Display: A/B B (selected item) LapTim RecRem A B (After a few seconds)
Elapsed time Track number Remaining time for recording Remaining time after the current track in a group Remaining time after the current location Track number Group name

GP Rem


Disc name

4-way control key (ENTER N,., >)
Depending on whether the group function is used or not, the operating conditions, and the disc settings, you may not be able to select certain indications or the indications may appear different.
Press MENU. Press. or > repeatedly until DISP appears in the display, and then press ENTER. Press. or > repeatedly until the information you want appears in the display, and then press ENTER. Each turn changes the display as follows: LapTim t RecRem t GP Rem t AllRem
Display window on the recorder
For more details about the indications in the display while playing, see Viewing various information (page 28).

Recording does not start in this step. If your source is an externally connected component, be sure to cue the source to the beginning of the material to be recorded before you start playback.
Press X again to start recording.
To switch back to automatic level control Select Auto in step 5.
You cannot adjust the left and right channel levels separately. Once you stop recording, the recorder will revert to automatic recording level adjustment mode the next time you start a recording operation. To adjust the recording level manually during synchro-recording, do steps 1 to 7 of the procedure in this section with SYNC-R is set to OFF. Then change the SYNC-R setting to sync ON, and start recording (page 23).

Various ways of playback

You can check the track or disc name, track number, the elapsed playing time of the current track, the number of the tracks recorded on the MD, the group name, and the total number of tracks in a group.
Indication: A/B A B (Selected item) LapTim 1 Rem Elapsed time Remaining time of the current track Remaining time after the current track in a group Remaining time after the current location B (After a few seconds) Track number Track name Group name
Depending on whether group play or normal play is selected, the operating conditions, and the disc settings, you may not be able to select certain indications or the indications may appear different.
While playing, press MENU. Press. or > repeatedly until DISP appears in the display, and then press ENTER. Each time you press. or >, the display changes as the follows:
If you want to check the remaining time or the recording position while recording or in stop mode, see Viewing various information (page 22).

Selecting the play mode

You can select from various play modes such as repeat play, shuffle play, or bookmark play.
Indication A/ B1) TrPLAY/
Play mode Bookmarked tracks play back in order of their track number. All the tracks are played in random order


1) Group play mode (
) appears whenever you play a disc with group settings. For more details, see Selecting the play mode for group play (Group Play Mode) (page 45).
While the recorder is playing, press MENU. Press. or > repeatedly until P-MODE flashes in the display, and then press ENTER again. Press. or > repeatedly to select play mode, and then press ENTER.

Before editing
You can edit your recordings by adding/ erasing track marks or labeling tracks and MDs.
Premastered MDs cannot be edited. Close the record-protect tab on the side of the MD before editing. The recorder is recording editing results while TOC Edit is flashing in the display. Do not move or jog the recorder. Do not disconnect the power source. The lid does not open.
The number of titles that can be stored on a disc depends on the number of characters that are input for track names, group names, and disc name.
If you enter the symbol // between the characters in disc names such as abc//def, you may be unable to use the group function.


Labeling recordings (Name)
You can name tracks and discs using the recorders character palette.
When you label a group, see page 47.


You can label a track and a disc while the recorder is stopped, recording, or playing. Note that if you label a track while the recorder is stopped, the track must be the currently selected. For labeling a group, see Labeling recorded groups (page 47).
Available characters Capital and small letters of the English alphabet Numbers 0 to 9 ! " # $ % & ( ) *. ; < = > ? @ _ ` + ' , / : _ (space) Maximum number of characters per name Track names, group names, and disc name: Approx. 200 each (containing a mixture of all available characters) Maximum number of characters that can be input per disc Alphanumeric characters and symbols only: Approx. 120 titles of about 10 characters each (a maximum of about 1,700 characters)
Press MENU. Press. or > repeatedly until EDIT appears in the display, and then press ENTER. Press. or > repeatedly until Name appears in the display, and then press ENTER.
Press. or > repeatedly until the following item appears in the display, and then press ENTER. T : Name D : Name
Repeat step 5, and then enter all characters of the label name. Press ENTER for 2 seconds or more. A track or disc is labeled.

When labeling a track When labeling a disc
The cursor flashes in the letter input area and the track, group, or disc is ready to be labeled.
To return the preceding settings Press x. To cancel labeling Press MENU.
When the recording is stopped while labeling a track or a disc during recording, or when the recording moves on to the next track while labeling a track, the input at that point is entered automatically.

The cursor flashes.

Press VOL + or to select a letter and press ENTER. The selected letter appears and the cursor moves to the next input position. The buttons used for character input and their functions are listed below. Operations Press VOL + or. Press ENTER. Press ENTER for 2 seconds or more. Press END SEARCH and press VOL + at the same time. Press END SEARCH and press VOL at the same time. Press X. Press x or MENU.
Re-labeling recordings Follow the procedure of the Labeling (page 37) to relabel a name.
The recorder cannot rewrite a disc or track name of more than 200 letters that was created by another device.
Functions To select a character To enter a letter To enter a name To insert a blank space before the cursor To delete a letter
Moving recorded tracks (Move)
You can change the order of the recorded tracks.
To move tracks in a disc with group settings, see page 47.
To switch capital and small letters. To cancel labeling.
Example Move track C (track number 3) from the third to the second track. Before moving
Press ENTER. The track moves to the selected destination track. For example above, 002 appears in the display.
To return the preceding settings Press x. To cancel moving Press MENU.

After moving

Dividing a track (Divide)
You can divide a track with a track mark, creating a new track from the part following the track mark. The track numbers will increase as follows.
You cannot add a track mark on a track that has been checked-out from your computer.
While playing the track you want to move, press MENU. Press. or > repeatedly until EDIT appears in the display, and then press ENTER. The recorder plays the selected track repeatedly. Press. or > repeatedly until Move appears in the display, and then press ENTER. Press. or > repeatedly until T : Move appears in the display, and then press ENTER. For example above, tTr003 appears in the display. Press. or > repeatedly to select the destination track number.

Track marking

Track numbers increase 4-way control key (., >) T MARK
Dividing a track directly
The track numbers will change as follows:
While playing or pausing an MD, press T MARK on the recorder at the point you want to mark. MK ON appears in the display, and a track mark is added. The track number will increase by one.

Selects the recording mode (SP, LP2, page 24 LP4, or monaural). Adds track marks automatically at specified intervals. Manually adjusts the recording level. Allows you to specify whether material is overwritten or not when recording. Sets the recorder to create a new group with each recording operation. page 25 page 27 page 52
page 52 page 29 page 31 page 52 page 53
Selecting the play Selects the play mode, such as repeat mode play, shuffle play, etc. Changing the sound quality Adjust the treble and bass, and stores two sets of treble-bass adjustment.
Starting playback Sets the recorder to start playback or quickly cue to a track quickly. Limiting the maximum volume Display Viewing information Labeling (Name) Sets a limit on the maximum volume to protect your hearing.
Displays various information such as pages 22 the remaining time, etc. in the display and 28 window. Labels tracks, groups, or the disc. page 37 (track and disc) page 47 (group)


Category Editing

Function Moving

What it does

Site page

Changes the order of tracks or groups. page 38 (track) page 47 (group) Erases tracks, groups, or the entire disc contents. page 41 (track and disc) page 49 (group) page 45 page 46


Assigning tracks to groups
Assigns recorded tracks or groups to a new group.
Releasing a group Releases group settings.
How to use the menu items
To set the menu items, do the following procedure. Press MENU to enter the menu. Press. or > to select the item. Press ENTER to enter the selection. Repeat steps 2 and 3. The setting will be entered when you press ENTER at the last.

MENU 4-way control key

To return the preceding setting

Press x.

To cancel the operation while setting

Press MENU.

Turning off the beep sound
You can turn on/off the beep sound on the recorder and the remote control.
Creating a new group when recording
By pressing N while pressing REC T MARK, you can set the recorder to create a new group automatically each time you record. This is convenient when recording several CDs in succession.

To protect a recorded MD

To record-protect an MD, slide open the tab at the side of the MD. In this position, the MD cannot be recorded. To record again, slide the tab back so the tab is visible.

Back of the MD

Recorded material is protected.

Notes on battery

Incorrect battery usage may lead to leakage of battery fluid or bursting battery. To prevent such accidents, observe the following precautions: Install the + and poles of the battery correctly. Do not try to recharge dry battery. When the recorder is not to be used for a long time, be sure to remove the batteries. If a battery leak should develop, carefully and thoroughly wipe away battery fluid from the battery compartment before inserting new ones.
Recorded material is not protected.

Note on maintenance

Clean the terminals periodically with a cotton swab or a soft cloth. If you have any questions or problems concerning your recorder, please consult your nearest Sony dealer. (If a trouble occurred when the disc was in the recorder, we recommend that the disc be left in the recorder when you consult your Sony dealer so that the cause of trouble may be better understood.)

Note on mechanical noise

The recorder gives off mechanical noise while operating, which is caused by the power-saving system of the recorder and it is not a problem.

Power requirements


Audio playing system

MiniDisc digital audio system

Laser diode properties

Material: GaAlAs Wavelength: = 790 nm Emission duration: continuous Laser output: less than 44.6 W (This output is the value measured at a distance of 200 mm from the lens surface on the optical pick-up block with 7 mm aperture.)
Recording and playback time (when using MDW-80)
Maximum 160 min. in monaural Maximum 320 min. in LP4 stereo
Sony AC Power Adaptor connected at the DC IN 3V jack: 120 V AC, 60 Hz (Models for USA, Canada, Mexico, and Taiwan) 230 V AC, 50/60 Hz (Models for continental Europe, Singapore and Thailand) 240 V AC, 50 Hz (Model for Australia) 220 V AC, 50 Hz (Model for China) 230 - 240 V AC, 50 Hz (Models for U.K. and Hong Kong) 220 V AC, 50 Hz (Model for Argentine) 100 - 240 V AC, 50/60 Hz (Other models) The recorder: Size-AA (LR6) alkaline battery

Battery operation time3)

See Battery life (page 56) Approx. 81.0 27.7 74.4 mm (w/h/d) (31/4 11/in.)


380 rpm to 2,700 rpm (CLV)

Dimensions Mass

Error correction
ACIRC (Advanced Cross Interleave Reed Solomon Code)
Approx. 103 g (3.6 oz) the recorder only

Sampling frequency

44.1 kHz

Sampling rate converter

Input: 32 kHz/44.1 kHz/48 kHz


ATRAC (Adaptive TRansform Acoustic Coding) ATRAC3 LP2/LP4
LINE IN (OPTICAL) jack is used to connect either a digital (optical) cable or a line (analog) cable. 2)The i jack connects either headphones/ earphones or a line cable. 3)Measured in accordance with JEITA.
Frequency response: 50 to 20,000Hz (Differs depending on your car cassette deck) Dimensions: Approx. 102.4 12.1 63.8 mm (w/h/d) (41/8 1/2 25/8 in.) Mass: Approx. 42 g (1.5 oz) Cord length: Approx. 1.5 m

Modulation system

EFM (Eight to Fourteen Modulation)

Frequency response

20 to 20,000 Hz 3 dB


Line in: stereo mini-jack for analog input (minimum input level 49 mV) optical (digital) mini-jack for optical (digital) input

Car battery cord

Input voltage: DC 12 V/24 V (only for negative # ground cars) Rated output voltage: DC 3.0 V Rated output current: 1,000 mA Dimensions: Approx. 36.0 26.2 101.1 mm (w/h/d) (17/16 11/in.) including projecting parts Mass: Approx. 60 g (2.2 oz) Cord length: Approx. 1.5 m US and foreign patents licensed from Dolby Laboratories. Design and specifications are subject to change without notice.


i: stereo mini-jack

Maximum output level

5 mW + 5 mW; load impedance 16 (Model for Mexico) 5 mW + 5 mW; load impedance 24 (Model for USA)

Optional accessories

Optical Cable POC-15B, POC-15AB, POC-DA12SP MDR-series stereo headphones/earphones* SRS-series active speakers Your dealer may not handle some of the above listed accessories. Please ask the dealer for detailed information about the accessories in your country. When using optional headphones, use only headphones/earphones with stereo mini plugs. You cannot use headphones/ earphones with micro plugs.
Troubleshooting and explanations

Troubles and solutions

If you find any troubles operating the recorder, follow the steps below.
Check this section, Troubles and solutions (page 61). You may find the solution of your trouble on Messages (page 67) as well. Check the information. If you cannot solve the problem after you made checks, consult your nearest Sony dealer.

While recording

Symptom The recorder overwrites existing materials when record. The recording starts from the end of the disc even when RPosi is set to FrHere. Cause/Remedy The record starting-position setting (R-Posi) is set to FrHere. , Set R-Posi setting to Fr End. The group recording (G-REC) is set to G-ON. (You cannot overwrite tracks when G-REC is set to G-ON.) , Set the group recording setting to G-OFF (page 52).

R-Posi (the record- The group recording (G-REC) is set to G-ON. starting point) cannot , Set the group recording setting to G-OFF (page 52), and be set to FrHere. then set R-Posi to FrHere.
Symptom Recording cannot be done correctly.
Cause/Remedy Audio sources may not be securely connected. , Disconnect the audio sources once and connect them again (pages 16, 18). There is no digital signal from the portable CD player. , When recording digitally from a portable CD player, use the AC power adaptor and disable the anti-skip function (such as ESP) on the CD player (page 18). The analog recording was made using a connecting cord with an attenuator. , Use a connecting cord without an attenuator. Recording level is too small to record (when adjusting the recording level manually). , Pause the recorder and adjust the recording level (page 27). The power sources was disconnected or a power outage occurred during recording. , The recording result is not recorded on the disc. Make recording again. The premastered MD is inserted. , Replace to the recordable MD. The remaining recordable time on the disc is 12 seconds or less (FULL appears). , Replace the disc. You tried to overwrite a track which is checked out from the computer. (Tracks that are checked out from the computer cannot be overwrite. The recording stops automatically.) , Check back the checked out track into the computer. , Record from the end of the disc.
Recording stops automatically while recording.
Stereo sound is heard This is normal. During digital recording, the sound will be stereo in the headphones/earphones, even though the recorded sound is in the headphones/ monaural. earphones while recording in monaural. Momentary noise is heard when recording. Due to the special digital audio compression technology used in LP4 stereo mode, momentary noise may occur on very rare occasions with certain sound sources. , Record in SP or LP2 mode.
The lid does not open The lid does not open until Edit disappears in the display. after recording.
Symptom TrFULL appears even before the disc has reached the maximum recording time (60, 74, or 80 minutes) and the recording cannot be done. The remaining recording time does not increase even after erasing numerous short tracks.
Cause/Remedy This is due to the MiniDisc system limitation. When 254 tracks have been recorded on the disc, TrFULL appears regardless of the total recorded time. More than 254 tracks cannot be recorded on the disc. , To continue recording, erase unnecessary tracks.
This is due to the MiniDisc system limitation. Tracks of under 12 seconds (in SP stereo), 24 seconds (in LP2 stereo mode or monaural), or 48 seconds (in LP4 stereo mode) in length are not counted and so erasing them may not lead to an increase in the recording time.

While playing

Symptom An MD is not played normally. Cause/Remedy Repeat play is selected. , Use MENU on the recorder to change back to the normal play. Playback mode is changed. , Use MENU on the recorder to change back to the normal play. Disc playing stopped before it came to the last track. , Press N (or NX on the remote control) for 2 seconds or more to start playing The recorder is placed where it receives continuous vibration. , Put the recorder on a stable place. A very short track may cause sound to skip. , Try not to create a track under one second long. Strong magnetism from a television or such device is interfering with operation. , Move the recorder away from the source of strong magnetism. The track was recorded in analog (When recorded in digital, the recording level will be automatically adjusted as same as the sound source), or you used a connecting cord with an attenuator. , Use a correct connecting cord. The recording level was low. , Adjust the recording level manually when recording. AVLS is on. , Release AVLS settings (page 53).
An MD is not played from the first track. Playback sound skips.
Sound has a lot of static. The volume of the recorded track is low.
Volume cannot be turned up.
Symptom No sound comes through the headphones/ earphones.
Cause/Remedy The headphones/earphones plug is not firmly connected. , Plug in the plug of the headphones/earphones firmly to the remote control. Plug in the plug of the remote control firmly to i. The plug is dirty. , Clean the plug. The GROUP button has been pressed ( is flashing in the display). , The recorder returns to normal if no operation has made for 5 seconds.
The recorder skips to several tracks ahead or behind when you press. or > on the recorder. The edited tracks may exhibit sound dropout during search operations.
This occurs due to the MiniDisc system limitation. The fragmentation of data may cause sound dropout while searching because the tracks are played in higher speed than normal playback.
R-channel sound is R-channel sound is not output if connecting to a cassette deck or an not output when amplifier with a monaural cord. playing a track , Make sure to use a stereo connecting cord. However, if the recorded from a connected equipment is a monaural specification, R-channel cassette deck or an sound will not be output even if connecting with stereo amplifier, or when connecting cord. listening a track with connected cassette deck or through an amplifier.

When the track title is highlighted, enter the text data from the keyboard.
You can also import names from a database with the albums. See the online help for details (page 88).
([CD Info]) button for use in labeling tracks or
Transferring audio data from your computer to the Net MD (Check-out)
Audio data stored on the Music Drive can be transferred to your Net MD. This process is called Check-out. The number of times a track can be checked out is restricted in this software for the protection of copyrights (page 102).


Checking out audio files to the Net MD
This section explains how to check out all audio files in a playlist*.
A playlist is a container that allows the stored audio files in the Music Drive to be classified by genre, artist, etc.
to display the recording navigation window.
Select (Music Drive) for [1 Sources] and (Device/Media) for [2 Targets], then click 3 ([Jump to Record Window]).
Click in the middle of the display and select the recording mode (page 82).
Standard transfer mode: Data are transferred in the format of the original files. Maximum available transfer space: All data are transferred in LP4 mode. SP transfer mode: All data are converted and transferred in normal stereo mode. Select this mode if you listen to checked-out data on equipment that does not support MDLP mode.
A playlist appears in the display.
Confirm that the audio files you are about to check out are okay for checking out.
The music notations beside the track number in the left panel of the list represent the number of times the file can be checked out (e.g. = the track can be checked out three more times). If appears beside the track number, the file cannot be checked out.

[Check-Out All].

Checking out of the files starts. All files in the playlist are checked out to the connected Net MD.
To cancel a check-out Click ([Stop]).
Once a check-out (or check-in) has started, do not disconnect the dedicated USB cable or power source until the check-out operation has completed. These actions may damage the data or cause the system to malfunction. Make sure not to bump the Net MD after check-out has started. If you do, the contents of the recording may not be stored correctly. Due to the limitations of the MD system, you may not be able to record the full amount of remaining recording time. Due to the limitations of the MD system, a maximum of about 1,700 characters can be stored for disc name, group names and track names on the disc. Take note of this fact when checking out a large number of tracks.

Listening to an MD

You can listen to an MD on the Net MD while it is connected to your computer. When disconnected from your computer, the Net MD can be used as an ordinary MiniDisc device. For details on Net MD operations, refer to the Recorder Operations section.
Listening to an MD with the Net MD connected to the computer
If you listen to an MD with the Net MD connected to the computer, be sure to listen with the Net MD itself (connecting to the headphones/earphones, speakers, etc.). The MD sound cannot be heard from headphones/earphones that are connected to the computer.
Listening to an MD with the Net MD disconnected from the computer
Listen to the MD after disconnecting the dedicated USB cable from the computer and the Net MD.
Generally, you cannot erase or divide/combine checked-out audio files. If you want to edit such files, check them back in first. Checked-out files can be edited on some MD devices; however, erasing a track will decrease the number of times the file can be checked out, and dividing or combining tracks will render the file impossible to check back into the computer (page 100).

Advanced operations

Using other functions!
Using the SonicStage online help
This manual explains only the basic operations of the SonicStage software. However, the software has a host of other functions that allow you to carry out various operations, such as importing audio files from the Internet, classifying and managing audio files, and playing in various play modes. For information and details on the various menus and operations, go to the online help. To display online help Click (help) while the SonicStage software is running.
You can display the online help by selecting the following: [Start][Programs]*[SonicStage][SonicStage Help] [All Programs] in the case of Windows XP.

Viewing online help

The Tabs The left side frame The right side frame
Lets find out how to use the online help first. An explanation on the use of the online help can also be found in the online help. 1 Double click [Overview] in the left-hand frame. 2 Click [About this Help file]. The explanation will appear in the right-hand frame. 3 Read the text. Scroll the display if necessary. Click underlined words to jump to their explanations.
In the online help, Device/Media is the general term for external devices such as Net MDs, Network Walkmans (i.e., portable IC audio players or portable Memory Stick audio players), and MusicClips.


Other information

Settings and Precautions

For users with OpenMG Jukebox, SonicStage, or SonicStage Premium installed on their computer
Confirm whether any tracks have been checked out from your computer. If tracks have been checked out from OpenMG Jukebox, an earlier version of SonicStage, or SonicStage Premium, it may not be possible to check those tracks back in with SonicStage Ver.1.5. It is recommended to check in the tracks before installing SonicStage Ver.1.5. Check the following contents before installing SonicStage Ver.1.5. The installation items and procedure will vary depending on the software installed on your computer. Users with OpenMG Jukebox installed Installed Version Ver.1.0~2.1 Ver.2.2 What to do Install SonicStage 1.5. OpenMG Jukebox Ver.1.0-2.1 is automatically uninstalled and replaced.1) OpenMG Jukebox Ver.2.2 and SonicStage Ver.1.5 can coexist in the computer. If you install SonicStage Ver.1.5, then OpenMG Jukebox Ver.2.2 will be automatically upgraded to the latest version.
Audio files recorded with OpenMG Jukebox Ver.1.0-2.1 are automatically converted to SonicStage Ver.1.5 files. For safety sake, it is recommended that you back up your audio data with the back-up tool before doing the upgrade to SonicStage Ver.1.5.
Users with an earlier version of SonicStage installed Installed Version Ver.1.0~1.5
What to do Install SonicStage Ver.1.5. The earlier version is automatically uninstalled and replaced.1)
Audio files recorded with SonicStage Ver.1.0-1.5 are automatically converted to SonicStage Ver.1.5 files. For safety sake, it is recommended that you back up your audio data with the back-up tool before doing the upgrade to SonicStage Ver.1.5.
Users with a SonicStage Premium installed Installed Version SonicStage Premium What to do Install SonicStage Ver.1.5. SonicStage Ver.1.5 and SonicStage Premium can co-exist in the computer.
Precautions on the co-existence of SonicStage Ver. 1.5 with OpenMG Jukebox Ver.2.2 or SonicStage Premium
Make sure the OpenMG Jukebox Ver.2.2 icon is not displayed in the task tray. If it is, the Net MD may not be recognized by your computer. Audio data recorded on the computer are stored in a common file and used by both applications. Therefore, if you delete an audio file (e.g., one album) in one application, it will be deleted in the other software as well.
Precaution on using a computer on which OpenMG Jukebox Ver.1.0-2.1 or SonicStage Ver.1.0-1.2 is installed
After installing SonicStage Ver.1.5, make sure you do not replace SonicStage Ver.1.5 with OpenMG Jukebox Ver.1.0-2.1 or SonicStage Ver.1.0-1.2., as all audio data in the Music Drive may be lost. If you begin the installation of OpenMG Jukebox Ver.1.0-2.1 or SonicStage Ver.1.0-1.2 by mistake, stop the installation immediately.
Note on hard disk drive space
120 MB or more free space on the hard disk drive is required. If your computer does not have enough space, the software will not be properly installed. The required free space differs according to the version of your Windows OS, or the amount of audio files that you handle.


ATRAC3 ATRAC3, which stands for Adaptive Transform Acoustic Coding3, is audio compression technology that satisfies the demand for high sound quality and high compression rates. The ATRAC3 compression rate is approximately 10 times higher than that of the Audio CD, resulting an increased data capacity for the media. Check-In /Check-Out Check-out is to transfer music files from a personal computer to an external device/media (such as a Network Walkman). Returning checked-out music files to the same computer is to check in. (You cannot move checked-out music files to another computer.) You can check out a music file, check it back in, and then check it out again an infinite number of times. The SDMI rules provide that up to four copies of a music file can be checked out at one time. OpenMG employs a method whereby three copies of a song can be checked out simultaneously, while the fourth copy is maintained as a master on your PC. Electronic Music Distribution (EMD) service EMD is a website that distributes music files which are available for purchase. MP3 MP3, which stands for MPEG-1 Audio Layer3, is a standard for audio file compression determined by the Motion Picture Experts Group, an ISO (International Organization for Standardization) working group. It enables compression of audio files to about 1/10 of the data size of a standard compact disc. Since the MP3 encoding algorithm is disclosed, there are various encoders/decoders that are compliant with this standard, including freeware that is available for no charge. The MP3 standard is therefore widely used in the computer field. Music Drive Music Drive is a music database for managing audio data on a computer. In Music Drive, audio files can be managed along with such information as artist names, track names, and CD jacket images, or can be combined and categorized in different playlists. OpenMG Copyright protection technology for the import and management of musical content from distribution services or CDs. By using software that are compliant with OpenMG, audio contents can be encrypted before storage on a hard disk drive to allow playback of those audio files on that computer. OpenMG also prevents the unauthorized distribution of the contents via the Internet or other networks. Playlist A playlist is like a container that can be used to hold and categorize files stored in Music Drive. For example, by making a jazz playlist and then putting your favorite jazz tracks into the playlist, you can play all of the tracks repeatedly or check them all out at the same time.


IC-746Pro Line Out Mod

Dallas Lankford

Some recorders, like the iAudio M3, do not have AGC. They may and do overload when recording. For a correctly designed receiver this would not be a problem because the line out would have an output level control. However, the IC-746Pro (746P) does not. Here we describe a mod which adds switchable line out level control. The mod uses one C & K miniature toggle switch and one Allen Bradley 5K ohm miniature slot adjust pot. The AB 5K is a high quality pot which has been out of production for many years. A 5K pot Honeywell RV6LAYSA502A-P, available from Allied Electronics, part no. 753-3502, , might be a suitable substitute; it is rated at 50,000 rotations and comes with a shaft lock nut.
The line out for a 746P is called AAFO by ICOM, which is available at pin 5 of the "Accessory 1" socket (an 8 pin DIN socket) and also pin 5 of the "Data" socket, both on the rear panel. The line out is rated by ICOM as 4.7K ohms source impedance, 100 - 300 mV rms nominal. The Measured output impedance of my 746P line out is about 5000 ohms at 400 Hz. I use a Sony MZ-N510 Type S Walkman (minidisc recorder) which has AGC in record mode, and so it does not need such a mod as described here. For the record, its imput impedance is about 30,000 ohms nominally at 400 Hz. On the other hand, the iAudio M3 does not have AGC in record mode, and it does overload when used with a 746P. I do not know the iAudio M3 input impedance; presumably it is high, like the Sony. Modifying a 746P is not easy because of all the microscopic 603 SMD's; I 1
wanted to avoid tampering with them. After studying the appropriate parts of the schematic (see above) and the "Main 1" PC board layout, I found what seemed like a reasonable mod. I placed a 4.7K (actually 5K) ohm pot from the "Accessory 1" audio output (AAFO) line to ground. This allows one to reduce the line out level when using a non-AGC recorder. I made the pot switchable to accommodate AGC minidisc recorders. When switched in, at its maximum (5K) setting, the pot reduces the line out by about 6 dB when using a high input impedance minidisc recorder; the line out can be further reduced as much as needed by adjusting the pot.
Above are photos of parts of the "Main 1" PC board and rear panel which show the mod. The toggle switch can be set for M = maximum (original 746P) or V = variable (the pot is switched in and is adjustable). There is not much room for error with regard to mounting 2
the pot and toggle switch; a miniature pot and miniature toggle switch must be used. I relied on one of my usual "tricks" for drilling the holes. I started with the smallest standard drill bits (1/16"), after using a center punch, and "slant drilled" through larger sizes to "move" the hole as necessary (using a round file if needed to move the hole further than a bit would move it) until reaching the desired 1/4" holed for the pot and toggle bushings. "Lock tab" holes were also drilled (carefully). Almost all drilling was done from the outside of the rear panel, with the 746P in upright position so that the metal "chips" and debris fell downward, away from the inside of the 746P. The exception was the "lock tab" hole for the pot, which was inside the 746P. In this case I used another "trick," a small piece of clear packing tape, stuck to the rear panel just below the drill site, with adhesive facing up in order to catch the metal chips and debris on the adhesive surface. Then additional tape was used to fix the debris so that it could be removed as the tape was removed, and thereby kept away from the inside of the 746P. The wiring is routine, except for connecting the 4.7K ohm pot to the line out PC board trace, and grounding the toggle switch. For the switch ground, a small part of the green solder mask was scraped away (to bare bright copper) with a small pen knife and an oval shaped solder blob was created with a 45 watt soldering iron (a dab of solder flux paste is helpful here). While the iron is still applied to the blob the stripped end of black Teflon insulated stranded copper wire (#22 or #24) is inserted into the blob, the iron is removed, and the wire is held in place until the solder blob solidifies. Additional insulation around the wire will help keep fingers from being burned while the solder blob solidifies.

The pot is connected to the PC board trace via a plate through near the surface mount electrolytic capacitor C1188; see the photographs above. You must remove the "Main" PC board for the following procedures so that you can access both sides of the PC board; see the photograph below. When the mod is completed, as shown in the photo below, the pot and toggle switch must be removed in order to remove the Main PC board. The photo below also shows (with color coded lines) which screws, ribbbon cables, and connectors must be removed in order to remove the Main PC board. The yellow arrow head denotes a connector which is under a ribbon cable. The ribbon cables are removed by pulling them out of the black receptacles soldered to the PC board. Pay close attention while disconnecting the ribbon cables from their receptacles so that you will recall how to reconnect them. The connectors are removed by pulling them up from the PC board. The screw which holds the audio output IC to the chassis (circled in red) is a machine screw (the other screws are sheet metal screws). One of the sheet metal screws is on the chassis rear; it holds the two RCA plugs in place. The screw at the edge of the metal box, the DSP circuits, holds a spring loaded metal strap which grounds the metal box. The DSP box is plug-in, and will probably have to be removed so that the ground strap can be repositioned correctly when reinstalling the Main PC board.
Although the photographs above shows the ground connection already made, the ground connection should be soldered to the PC board only after the the plate through solder work has been completed and the PC board has been reinstalled. The plate through is connected to the negative terminal of C1188 by a short PC board trace. I used #24 tinned solid copper wire, insulated with blue Teflon insulation, to connect the plate through to the 5K ohm pot. To make a good solder joint it may be helpful to first flow solder into the plate through, and then remove most or all of the solder with desoldering braid before inserting the # 24 solid wire. Even if solder remains in the plate through, the #24 solid wire, sans Teflon insulation, can still be inserted through the plate through by heating the wire near its end with the soldering iron as the wire is positioned at the entrance to the plate through. Do not heat the plate through and its pad directly with the soldering iron; excesssive heat can cause the plate through or its pad or both to disintegrate. When the solid wire has been passed through the plate through, solder both sides at the plate through pads, as if it were a regular PC board solder connection. Remove excess solder with desoldering braid. A loupe or other magnifier, 8x recommended, should be used to inspect (and correct, if necessary) all solder work. Use a diagonal cutter to cut off excess solid wire on the bottom side of the PC board. Put an appropriate length of Teflon insulation onto the solid wire and solder it to the 5K ohm pot.



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