Toshiba-MES30V-dap-sm 维修电路原理图.pdf

DIGITAL AUDIO PLAYERSERVICE MANUALMES60V, MES30V(US/CA)FILE NO. 400-200603GRJun., 2006Series The above models are classified as green products (*1).This Service Manual describes replacement parts for the green products. When repairing these greenproduct(s), use the part(s) described in this manual and lead-free solder (*2).For (*1) and (*2), see the next page.RadioFans.CN 收音机爱 好者资料库DOCUMENT CREATED IN JAPAN, JUNE, 2006(*1)GREEN PRODUCT PROCUREMENTThe EC is actively promoting the WEEE & RoHS Directives that define standards for recyclingand reuse of Waste Electrical and Electronic Equipment and for the Restriction of the use ofcertain Hazardous Substances. From July 1, 2006, the RoHS Directive will prohibit any marketingof new products containing lead.Increasing attention is given to issues related to the global environmental. Toshiba Corporationrecognizes environmental protection as a key management tasks, and is doing its utmost toenhance and improve the quality and scope of its environmental activities. In line with this,Toshiba proactively promotes Green Procurement, and seeks to purchase and use products,parts and materials that have low environmental impacts.Green procurement of parts is not only confined to manufacture. The same green parts used inmanufacture must also be used as replacement parts.(*2)LEAD-FREE SOLDERThis product is manufactured using lead-free solder as a part of a movement within the CEindustry at large to be environmentally responsible. Lead-free solder must be used in the servicingand repair of this product.WARNINGThis product is manufactured using lead free solder.DO NOT USE LEAD BASED SOLDER TO REPAIR THIS PRODUCT !The melting temperature of lead-free solder is higher than that of leaded solder by 86F to 104F(30C to 40C). Use of a soldering iron designed for lead-based solders to repair product madewith lead-free solder may result in damage to the component and or PCB being soldered. Greatcare should be made to ensure high-quality soldering when servicing this product especiallywhen soldering large components, through-hole pins, and on PCBs as the level of heat requiredto melt lead-free solder is high.RadioFans.CN 收音机爱 好者资料库IN-WARRANTY SERVICEIn-Warranty service for the MES60V and MES30V Digital Audio Playeris fulfilled via product exchange.Contact Toshiba Customer Solutions for instructions. 1-866-583-7353.PrecautionsSafety Precautions for ServiceThis section provides critical information for safety. Be sure to observe the content.Meaning of each indication is as follows: DANGERSafety indications mean that death or serious injury may be caused to service personneland/or surrounding people or users due to incorrect work by neglecting safety instruc-tions or due to resulting defects of the product, which indicates imminence of danger. WARNINGDeath or serious injury may be caused to service personnel and/or surrounding peopleor users due to incorrect work by neglecting the following instructions or due toresulting defects of the product. CAUTIONInjury or physical damage* may be caused to service personnel and/or surroundingpeople or users due to incorrect work by neglecting the following instructions or due toresulting defects of the product.* Physical damage includes damage to buildings, household goods, properties, livestock, and pets. WARNINGUnplug the power cable before starting work (for example, disassembly) that does not need powersupply.Otherwise, it may cause electric shock.Use an insulation transformer and/or wear protective gloves when power is ON, and unplug the powercable when replacing parts to avoid electric shock.Use specified spare parts of the product for replacement.Since some parts have safety characteristics (fire resistance, withstand voltage, etc.), use replacement partswith same characteristics.For safety-sensitive parts specified by marking in circuit diagrams or parts lists, use specified parts.After repair work is completed, properly reassemble disassembled parts and securely reconnect cablesas they were.For safety reasons, some insulating materials such as tubes and tapes are used, and some parts are mountedwith a gap from the board surface. Furthermore, internal wiring is kept away from heating parts or high-voltage parts by using clampers or by other means. When reassembling/reconnecting these parts, put them asthey were.Do not catch the internal cables by the cabinet or cover. Improper assembling or cable connection may causeelectric leak or fire, which may lead to an accident on the user side.After repair work is completed, unplug the power cable, and measure the insulation resistance betweenthe external metal portion and plug blade with a 500V megger. The resistance shall be 1M ohms ormore.If the resistance is lower than 1M ohms, inspect and rectify the product.Do not alter the product.Alteration of the product may cause malfunction or failures, which may lead to an accident such as electricleak or fire on the user side.Advise users to keep children away from the on-site work area.Children in the work area may be injured by tools, disassembled product or parts.Precautions for Removing the Built-in Battery DANGERDo not attempt to drive a nail into the built-in battery, nor strike it with a hammer, stepon it or otherwise subject it to strong impact. The electrodes may shortcircuit, resultingin heat generation, explosion or ignition. DANGERDo not connect the electrodes (positive/negative terminals) of the built-in battery usinga wire or other metal object. Also avoid carrying or storing the battery together with anecklace, hairpin or other object made of metal. The electrodes may short-circuit,resulting in heat generation, explosion or ignition. DANGERDo not heat, disassemble or modify the built-in battery or place it in fire or water.Doing so may cause an explosion, ignition or heat generation, resulting in fire orserious injury. DANGERDo not place the built-in battery near fire or in the heat of the sun.Doing so may result in fire, explosion or heat generation. DANGERDo not bring the built-in battery near heating equipment. Doing so may result in fire,explosion or heat generation. DANGERWrap the connector of the built-in battery with insulation tape.Otherwise, the electrodes may short-circuit, resulting in heat generation, explosion orignition. WARNINGDo not place the built-in battery within the reach of small children.Doing so may result in injury or accident. WARNINGIf leaked fluid from the built-in battery should enter your eye, rinse with clean waterand seek immediate medical attention. Neglecting proper cleaning or medical treatmentmay result in eye injury. 1 CONTENTS 1. PRODUCT OVERVIEW .2 1.1. PRODUCT OUTLINE .2 1.1.1. INTERNAL COMPOSITION.2 1.1.2. ACCESSORIES.3 1.1.3. PLACE FOR STORING THE FIRMWARE.3 1.1.4. ABOUT CONTENT PROTECTION.3 1.1.5. HOW MUSIC/VIDEO IS PLAYED BACK .4 1.1.6. TRANSFER OF CONTENT FROM THE PC.4 2. BLOCK DIAGRAM .5 2.1. LOGIC CIRCUIT BLOCK DIAGRAM.5 2.2. POWER CIRCUIT BLOCK DIAGRAM.6 3. CAUTIONS ON REPAIR.7 3.1. TELL THE OWNER THAT THE CONTENTS ON THE HDD MAY BE ERASED. .7 3.2. REMOVE THE AC ADAPTOR AND SET THE BATTERY SWITCH TO OFF.7 3.3. WHEN REPLACING THE HDD.8 3.3.1. PROTECT THE HDD FROM IMPACT.8 3.3.2. HOLDING THE HDD.8 3.3.3. PROCESS AT HDD REPLACEMENT.9 3.4. WHEN REPLACING THE MAIN BOARD.12 3.4.1. UPDATING THE FIRMWARE.12 3.5. WHEN REPLACING THE LCD AND LCD BACKLIGHT UNIT .16 3.5.1. INCORPORATING THEM INTO THE LCD FRAME .16 4. TROUBLESHOOTING.17 4.1. ANTICIPATED DEFECTS.17 4.2. DEFECT ANALYSIS PROCEDURE AS A MAINTENANCE SERVICE.18 4.2.1. THE UNIT WILL NOT TURN ON. .18 4.2.2. NO SOUND COMES OUT. .20 4.2.3. FM CANNOT BE RECEIVED.20 4.2.4. THE SOUND IS ODD. .21 4.2.5. THE LCD DISPLAY IS ODD. .21 4.2.6. THE BUTTONS OF UNIT DO NOT WORK. .21 4.2.7. THE REMOTE CONTROLLER DOES NOT WORK.21 4.2.8. THE USB CONNECTION FAILS. .21 4.2.9. THE BATTERY CANNOT BE RECHARGED. (WHEN BATTERY-POWERED, THE UNIT PLAYS BACK ONLY FOR A SHORT TIME.).22 4.2.10. HDD IS NOT RECOGNIZED. .23 5. PROCEDURE TO CONFIRM THE UNITS F/W VERSION.24 6. DISASSEMBLING/REASSEMBLING PROCEDURES.25 6.1. DISASSEMBLING PROCEDURES.25 6.2. REASSEMBLING PROCEDURES.30 7. EXPLODED VIEW .34 8. PARTS LIST.35 2 1. Product Overview TOSHIBA HDD audio player gigabeat S series is the portable audio player in which the HDD of 30GB/60GB is built. As the built-in HDD is thick, the MES60 is thicker. Main differences from the previous model (gigabeat X series) are as follows. By adopting the push-type button, the operability is enhanced. PMC (Portable Media Center) is adopted. 1.1. Product Outline 1.1.1. Internal Composition The gigabeat S series consists of the following main components. Main board A part of firmware is stored in the flash ROM on the main board. HDD The HDD is partitioned into two partitions. One is for data and the other is for system. The firmware is stored in the system partition. Contents such as music data are stored in the data partition. Data other than music data such as Word files can be stored in the external HDD. (But, files cannot be directly opened.) TFT color liquid crystal display White LED backlight Battery Switches 13 pieces PMC compliant push button (7 pieces on the front, 6 pieces at sides) Cabinet parts The HDD is covered with special rubber and held in the air. This keeps it resistant to impact and vibration. 3 1.1.2. Accessories The product is furnished with main accessories as follows. AC adaptor Power cord (which varies with destinations.) USB cable USB conversion cable Wired remote controller (Option) Headphones Software CD-ROM Owners Manual 1.1.3. Place for storing the firmware The firmware is stored in the flash ROM on the main board and on the HDD. The firmware is stored in the system partition on the HDD. Even if a PC is connected, the system partition cannot be seen on the Explorer. 1.1.4. About Content Protection Using the Windows Media DRM10, the contents are protected. Using the Windows standard application Windows Media Player 10, transfer (copy) the music data (WMA/MP3/WAV format)/video data (WMV) stored in a PC to the HDD so that the transferred content can be played back. Transferring the data via USB is also possible. When the content, which is once transferred to a PC by the Explorer, is transferred to other gigabeat S series, unless the content is protected by the Windows Media DRM, the content can be played back. But, when the content protected by the Windows Media DRM is transferred to other gigabeat S series, unless the license of the content to be transferred is acquired, the content cannot be played back. 4 1.1.5. How music/video is played back This section explains how the unit plays back the content (compressed music data (WMA/MP3, PCM music data (WAV) and video data (WMV) stored on the HDD. The CPU reads out the content data (WMA/MP3/WAV/WMV) on the HDD and stores it in the SDRAM. The CPU accesses to the HDD every few minutes (It differs depending on the contents bit rate.), reads out the data, and accumulates it in the SDRAM. When the HDD is not accessed, the power of HDD is turned off to save the power. However, as the PCM music data contains the large amount, the HDD is always powered. The CPU restores the compressed music data in the SDRAM and converts it to PCM data. If the data in the SDRAM is video, the CPU restores it to bit map data. The music data restored to the PCM is sent from the SDRAM to the DAC by the CPU. In case of video data, the CPU sends the bit map data to the LCD.) The DAC converts the PCM music data to the analog signal, which is then outputted to headphones. The CPU sets the volume control and equalizer levels in the DAC, which controls the volume level and equalizer levels, using their set data. 1.1.6. Transfer of content from the PC When the unit is connected to the PC with the USB cable, the PC recognizes the unit as a MTP device (MultiMedia Transfer Protocol device). When transferring the content by using the Windows Media Player on the PC, the content data is sent to the unit via USB. Then, according to the MTP protocol, the CPU writes the received content data on the HDD. 5 2. Block diagram 2.1. Logic circuit block diagram 6 2.2. Power circuit block diagram 7 3. Cautions on repair Before repairing a product of the gigabeat S series, take the following cautions: 3.1. Tell the owner that the contents on the HDD may be erased. Replacing or formatting the HDD will erase the content on the HDD. Therefore, in receiving the product from the owner, ask the owner to back up his/her important data. 3.2. Remove the AC adaptor and set the BATTERY switch to OFF. Before disassembling, ensure to remove the AC adaptor and set the BATTERY switch to “OFF”. When the gigabeat S series is powered by the AC adaptor or the battery, even if the power switch is turned off, the power is supplied to the LCD and almost all ICs. Therefore, before repairing, the AC adaptor or the battery must be removed. By setting the BATTERY switch to “OFF”, the power supply from the battery is stopped and the unit becomes in the same state as when the battery is removed. 8 3.3. When replacing the HDD 3.3.1. Protect the HDD from impact. Note that the HDD is vulnerable to impact. Merely falling the HDD from a vertical position would give an impact exceeding the specifications. 3.3.2. Holding the HDD When holding the HDD, hold it at the following position: Do not hold it at the following position: 9 3.3.3. Process at HDD replacement When replaced to the un-formatted HDD, restore the HDD in the factory setting state by transferring the firmware and the supplied data to the HDD in the procedure below. HDD formatting 1) Set the BATTERY switch to “OFF”. 2) Connect the AC adaptor and start up the unit. 3) Format automatically the HDD and display the menu below on the LCD. Wait until the menu appears. Fig. Menu of waiting for the PC connection T&D Transfer 4) Start up Transfer Program (Ottoman.exe) on the PC and select the scenario file (*.ini) in which files to be transferred are described. Ottoman.exe and the scenario file are provided on the CD-ROM (Material No.: 360058245). Names for the destination-wise stored folder and file are different depending on the destination. The relationship between destination and folder is shown on the table below. Table Destination and Folder Destination Folder name Scenario file name Japan OTTOMAN_T&D_FW_JP OTTOMAN_T&D_FW_JP.ini U.S.A. OTTOMAN_T&D_FW_US OTTOMAN_T&D_FW_US.ini Start up Ottoman.exe and select the scenario file. Then, the menu below appears. 10 Fig. Menu display on the PC (T&D Transfer) Check two points of (A) and (B) on the above menu. These are different for every destination (A) is same.) The display for every destination is as shown below. Table Difference on the display by destination (Differences are underlined.) Destination (A) (B) Japan version 0.9.9.10 T&D TRANS PROG(JP) Ver.6423A U.S.A. version 0.9.9.10 T&D TRANS PROG(US) Ver.6423A 5) Wait for a while. Then, “OK” appears on the PC. 6)