Sony mz e 77 service manual
This is the 47 pages manual for sony mz e 77 service manual.
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Extracted text from sony mz e 77 service manual (Ocr-read)
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– 2 – TABLE OF CONTENTS 1. SERVICING NOTES ............................................... 3 2. GENERAL ................................................................... 4 3. DISASSEMBLY ......................................................... 5 4. TEST MODE .............................................................. 9 5. ELECTRICAL ADJUSTMENTS ......................... 14 6. DIAGRAMS 6-1. Block Diagram –RF Section– ......................................... 19 6-2. Block Diagram –SERVO Section – ................................ 21 6-3. Block Diagram –MAIN Section – .................................. 23 6-4. Printed Wiring Board –MAIN Board (Component Side) – ............................... 25 6-5. Printed Wiring Board –MAIN Board (Conductor Side) – ................................. 27 6-6. Schematic Diagram –MAIN Board (1/4) – .................... 29 6-7. Schematic Diagram –MAIN Board (2/4) – .................... 31 6-8. Schematic Diagram –MAIN Board (3/4) – .................... 33 6-9. Schematic Diagram –MAIN Board (4/4) – .................... 35 6-10. Printed Wiring Board –SYSTEM Board – ..................... 37 6-11. Schematic Diagram –SYSTEM Board – ........................ 39 6-12. Printed Wiring Board –SW Board – ............................... 41 6-13. Schematic Diagram –SW Board – .................................. 43 6-14. IC Pin Function Description ........................................... 49 7. EXPLODED VIEWS ................................................ 56 8. ELECTRICAL PARTS LIST ............................... 58 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 - Small body almost the size of a MiniDisc jacket Ideal weight and size; fits in your shirt pocket. -Personalized sound through Digital Sound Preset functions You can store two sets of sound quality adjustments (made during playback) to two switches. - Low power-consumption design enables extended battery life. - Simple One-Touch Eject function for easy MiniDisc handling A single press of the OPEN button causes the player lid to open and the MiniDisc to eject. - Easy-to-operate headphones remote control with backlit LCD The LCD displays disc and track information, playback mode as well as battery condition. Keep the main unit in your pocket and operate the MiniDisc player through the slim stick remote control. - Shock-resistant memory offsets up to 40 seconds of o ptical read errors.
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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 - When repairing this set with the power on, if you remove the upper panel assy, this set stops working. In this case, you can work without the set stopping by fastening the hook of the open/close detect switch (SW board (S809)) with tape. - This set is designed to perform automatic adjustment for each adjustment and write its value to EEPROM. Therefore, when EEPROM (IC802) has been replaced in service, be sure to per- form automatic adjustment and write resultant values to the new EEPROM. After EEPROM (IC802) is replaced, digital sound preset set- ting value for display is changed to 00. Please make sure to check that digital sound preset setting value for display is 01. (Refer to page 14) - Replacement of CXD2661GA-2 (IC601) and CXR701080- 010GA (IC801) used in this set requires a special tool. There- fore, they cannot be replaced. SW board (S809) laser-tap Flexible Circuit Board Repairing - Keep 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. 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. CAUTION Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous ra- diation exposure.