Sony mz e 800 service manual

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-“ 2 -“ TABLE OF CONTENTS 1. SERVICING NOTES ............................................... 3 2. GENERAL ................................................................... 6 3. DISASSEMBLY ......................................................... 7 4. TEST MODE .............................................................. 12 5. ELECTRICAL ADJUSTMENTS ......................... 17 6. DIAGRAMS 6-1. Block Diagram -“MAIN Section (1/2) -“ ......................... 21 6-2. Block Diagram -“MAIN Section (2/2) -“ ......................... 23 6-3. Block Diagram -“DISPLAY/KEY CONTROL/ POWER SUPPLY Section -“ ........................................... 25 6-4. Printed Wiring Board ...................................................... 27 6-5. Schematic Diagram -“MAIN Board (1/4) -“ .................... 29 6-6. Schematic Diagram -“MAIN Board (2/4) -“ .................... 31 6-7. Schematic Diagram -“MAIN Board (3/4) -“ .................... 33 6-8. Schematic Diagram -“MAIN Board (4/4) -“ .................... 35 6-9. IC Pin Function Description ........................................... 40 7. EXPLODED VIEWS ................................................ 47 8. ELECTRICAL PARTS LIST ............................... 50 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. Features - Compact body with newly developed head-loading system. Insert or eject an MD with the slightest touch of a finger. - Simple-to-charge folding standup battery charger Insert the MD player into the folding standup battery charger for simple, one- step charging. By connecting an optional car battery cord to the battery charger, you can listen to the player in the car without worrying about battery rundown. - LCD display built into player for easy viewing in the car An easy-to-see LCD display built into the player allows you to monitor track numbers when the remote control display is out of view. - Personalized sound through Digital Sound Preset functions You can store two sets of sound quality adjustments (made during playback) to two switches. - Small body almost the size of a MiniDisc jacket - Low power-consumption design for extended battery life. - Easy-to-operate earphones remote control with backlit LCD - Shock-resistant memory offsets up to 40 seconds of optical read errors. Notes on chip component replacement - Never reuse a disconnected chip component. - Notice that the minus side of a tantalum capacitor may be dam- aged by heat. Flexible Circuit Board Repairing - Keep the temperature of the soldering iron around 270 ËšC 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.

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-“ 3 -“ NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK OR BASE UNIT The laser diode in the optical pick-up block may suffer electro- static break-down because of the potential difference generated by the charged electrostatic load, etc. on clothing and the human body. During repair, pay attention to electrostatic break-down and also use the procedure in the printed matter which is included in the repair parts. The flexible board is easily damaged and should be handled with care. NOTES ON LASER DIODE EMISSION CHECK Never look into the laser diode emission from right above when checking it for adjustment. It is feared that you will lose your sight. NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK (LCX-2E) The laser diode in the optical pick-up block may suffer electro- static break-down easily. When handling it, perform soldering bridge to the laser-tap on the flexible board. Also perform mea- sures against electrostatic break-down sufficiently before the op- eration. The flexible board is easily damaged and should be handled with care. OPTICAL PICK-UP FLEXIBLE BOARD SECTION 1 SERVICING NOTES -In performing the repair with the power supplied to the set, removing the MAIN board causes the set to be disabled. In such a case, fix a convex part of the open/close detect switch (S809 on MAIN board) with a tape in advance. -Replacement of CXD2661GA-2 (IC601) and CXR701080- 016GA (IC801) used in this set requires a special tool. There- fore, they cannot be replaced. -On the set having the microcomputer version 1.000, the NV reset failure will occur. Therefore, in executing the NV reset during electrical adjustment, follow the troubleshooting method of NV reset to perform the NV reset (see page 17). laser-tap mechanism deck section MAIN boar d tape open/close detect switch (S809)