Sony cdx t 70 mx service manual
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2 CDX-T70MX AEP model: When replacing the main chassis assy of mechanism deck which have the CAUTION LABEL attached, please be sure to put a new CAUTION LABEL (3-223-913-11) to the main chassis assy. SAFETY-RELATED COMPONENT WARNING!! COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE WITH MARK 0 ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUB- LISHED BY SONY. Notes on chip component replacement -N ever reuse a disconnected chip component. - Notice that the minus side of a tantalum capacitor may be dam- aged by heat. Flexible Circuit Board Repairing -K eep the temperature of the soldering iron around 270 ˚C dur- ing repairing. - Do not touch the soldering iron on the same conductor of the circuit board (within 3 times). - Be careful not to apply force on the conductor when soldering or unsoldering. CAUTION Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous ra- diation exposure. SERVICING NOTES NOTES ON HANDLING THE OPTICAL PICK- UP BLOCK OR BASE UNIT The laser diode in the optical pick-up block may suffer electro- static breakdown because of the potential difference generated by the charged electrostatic load, etc. on clothing and the human body. During repair, pay attention to electrostatic breakdown and also use the procedure in the printed matter which is included in the repair parts. T he flexible board is easily damaged and should be handled with care. NOTES ON LASER DIODE EMISSION CHECK The laser beam on this model is concentrated so as to be focused on the disc reflective surface by the objective lens in the optical pick-up block. Therefore, when checking the laser diode emis- sion, observe from more than 30 cm away from the objective lens. US model: If the optical pick-up block is defective, please replace the whole optical pick-up block. Never turn the semi-fixed resistor located at the side of optical pick-up block. OPTICA L PICK-UP BLOCK SEMI-FIXEDRESISTOR
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3 CDX-T70MX 1 2 6 3 5 7 1 2 6 7 4 8 3 5 8 4 9 About MP3 files Tree 1 Tree 2 Tree 3 Tree 4 Tree 5 (root)Folder (album) MP3 file (track) MP3 (MPEG 1 Audio Layer-3) is a standard technology and format for compressing a sound sequence. The file is compressed to about 1/10 of it\ s original size. Sounds outside the range of human hearing are compressed while the sounds we can hear are not compressed. Notes on discsYou can play MP3 files recorded on CD-ROMs, CD-Rs (recordable CDs), and CD-RWs (rewritable CDs). The disc must be in the ISO 9660 * 1 level 1 or level 2 format, or Joliet or Romeo in the expansion format. You can use \ a disc recorded in Multi Session * 2. *1ISO 9660 FormatThe most common international standard for the logical format of files and folders on a CD-ROM. There are several specification levels. In Level 1, file names must be i\ n the 8.3 format (no more than eight characters in the name, no more than\ three characters in the extension .MP3) and in capital letters.\ Folder names can be no longer than eight characters. There can be no more than eight nested folder levels. In level 2, file names can be up to 31 characters long (including the delimiter, the dot ., and the extension . MP3). Each fo\ lder can have up to 8 trees. For Joliet or Romeo in the expansion format, make sure of the contents of the writing software, etc. *2Multi SessionThis is a recording method that enables adding of data using the Track- At-Once method. Conventional CDs begin at a CD control area called the Lead-in and end at an area called Lead-out. A Multi Session CD is a CD having multiple sessions, with each segment from Lead-in to Lead- out regarded as a single session. CD-Extra: A format that contains audio tracks (audio CD data) in Session 1, and a data track in Session 2. Mixed CD: A format that contains a data track and audio tracks (audio CD data) in a session. Notes- If MP3 files and Audio data are mixed in a disc, the first identifi\ edfile or data will be played back. - With formats other than ISO 9660 level 1, folder names or file names may not be displayed correctly. - When naming, be sure to add the file extension .MP3 to the \ file name. - If you put the extension .MP3 to a file other than MP3, the\ unit cannot recognize the file properly and will generate random noise that could damage your speakers. The playback order of the MP3 filesThe playback order of the folders and files is shown in the illustration\ above. Notes-A folder that does not include an MP3 file is skipped. -I f you playback an MP3 file before the information on all the CDs in the disc magazine has been read, and then set the ignition to OFF or select another source, the beginning of the current track may play back when you resume playback. - The unit reads the disc information (the number of folders and files, or the location of the data) before playback of an MP3 file. It may take more time to start playback of a disc with a complex file structure. -W hen a disc magazine is inserted into the CD changer or the reset button of the connected car audio is pressed, the unit will automatically be activated and read the information on the CDs. When the information on all the CDs in the disc magazine has been read, the unit will automatically stop operation. The unit firstly reads all of the disc information in the disc magazine. Depending on the recording method, it may take some time to stop the operation even if you set the ignition key to OFF during disc reading. This is not a malfunction. - The following discs take a longer time to start playback. –a disc recorded with complicated tree structure. –a disc recorded in Multi Session. –a disc to which data can be added. We recommend that you make only one or two trees for each disc. - Depending on the condition of the disc, it may not play back. For details, please refer to Notes on discs. -M aximum folder number in a disc: 255 * (including root folder and empty folders) -M aximum file number in a disc: 511 * *Maximum number of files and folders: 512 When a file/folder name contains many characters, this number may become less than 512. Cautions when playing a disc that is recorded in Multi Session- When the first track of the first session is audio CD data: Non-music da\ ta information (track number, time, etc.) is displayed with no sound. - When the first track of the first session is not audio CD data: – Audio CD data is played back normally; other data is played back with no sound. (MP3 file(s) cannot be played back.) – If no MP3 file is in the disc, NO Music is displayed and nothing\ is played back. (Audio CD data is not recognized.) Note on character codesCharacter codes vary depending on the master unit. For details, refer to the operating instructions for the master unit. Note on display of playing timeIn the following cases, elapsed playing time may not be displayed accurately. – when an MP3 file of VBR (variable bit rate) is played. – during fast-forward/reverse. Tip- To specify a desired playback order, before the folder or file name, input the order by number (e.g., 01, 02), then r\ ecord contents onto a disc. (The order differs depending on the writing software.) -A disc/album/track name or track number that is over 99 may not be displayed accurately when this unit is connected to a master unit that does not support MP3. A master unit that supports MP3 is recommended. About ID3 tag version 2Although not a malfunction, the following occurs when an MP3 file containing ID3 tag ver.2 is played: – When skipping a portion of ID3 tag ver.2 (at the beginning of the track), sound is not output. Skip time changes depending ID3 tag ver.2 capacity. Example: At 64 kbytes, it is about 2 seconds (with RealJukebox). – The displayed elapsed playing time when skipping a portion of ID3 tag ver.2 is inaccurate. For MP3 files of a bit rate other than 128 kbps, time is not displayed accurately during playback. – When an MP3 file is created with MP3 conversion software (ex. RealJukebox *), ID3 tag ver.2 will automatically be written. * RealJukebox is a registered trademark of RealNetworks, Inc. As of December, 2001 Audio CD MP3 files E Notes on CD-R/CD-RW discs-You can play CD-Rs/CD-RWs (recordable CDs/rewritable CDs) on this unit (fig. E). -Some CD-Rs/CD-RWs (depending on the equipment used for its recording or the condition of the disc) may not play on this unit. -You cannot play a CD-R/CD-RW that is not finalized *. -A CD-R/CD-RW to which a session can be added can be played.*A process necessary for a recorded CD-R/CD-RW disc to be played on the audio CD player.