Sony d nf 340 service manual

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2 D-NF340/NF341 TABLE OF CONTENTS 1. SERVICING NOTES ............................................... 2 2. GENERAL ................................................................... 4 3. DISASSEMBLY 3-1. Disassembly Flow ........................................................... 5 3-2. Cabinet (Lower) Assy ...................................................... 5 3-3. MAIN Board, CD Mechanism (CDM-3525A) ............... 6 3-4. Cabinet (Inner) Assy, SWITCH Board ............................ 6 4. DIAGRAMS 4-1. Schematic Diagram – MAIN Board (1/3) – .................... 9 4-2. Schematic Diagram – MAIN Board (2/3) – .................... 10 4-3. Schematic Diagram – MAIN Board (3/3) – .................... 11 4-4. Printed Wiring Board – MAIN Board (Component Side) – ............................... 12 4-5. Printed Wiring Board – MAIN Board (Conductor Side) – ................................. 13 4-6. Printed Wiring Board – SWITCH Board – ..................... 14 4-7. Schematic Diagram – SWITCH Board – ........................ 15 5. EXPLODED VIEWS 5-1. Upper Lid and Cabinet (Inner) Section ........................... 20 5-2. Cabinet Lower Section .................................................... 21 6. ELECTRICAL PARTS LIST ................................ 22 Notes on chip component replacement - Never reuse a disconnected chip component. - Notice that the minus side of a tantalum capacitor may be damaged by heat. Flexible Circuit Board Repairing - Keep the temperature of the soldering iron around 270 ˚C during 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 radiation e xposure. 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 PA RT NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY. On the AC power adaptor - Use only the AC power adaptor supplied. If your player is not supplied with an AC power adaptor, use an AC-E45HG AC power adaptor*. Do not use any other AC power adaptor. It may cause a malfunction. * Not available in Australia and some other regions. Ask your dealer for detailed information. Polarity of the plug - Connect the AC power adaptor to an easily accessible AC outlet. Should you notice an abnormality in the AC power adaptor, disconnect it from the AC outlet immediately. The laser diode in the optical pick-up block may suffer electrostatic 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. UNLEADED SOLDER Boards requiring use of unleaded solder are printed with the lead- free mark (LF) indicating the solder contains no lead. (Caution: Some printed circuit boards may not come printed with the lead free mark due to their particular size) : LEAD FREE MARK Unleaded solder has the following characteristics. - Unleaded solder melts at a temperature about 40 °C higher than ordinary solder. Ordinary soldering irons can be used but the iron tip has to be applied to the solder joint for a slightly longer time. Soldering irons using a temperature regulator should be set to about 350 °C. Caution: The printed pattern (copper foil) may peel away if the heated tip is applied for too long, so be careful! - Strong viscosity Unleaded solder is more viscou-s (sticky, less prone to flow) than ordinary solder so use caution not to let solder bridges occur such as on IC pins, etc. - Usable with ordinary solder It is best to use only unleaded solder but unleaded solder may also be added to ordinary solder. OPERATION CHECK WHEN THE LID IS OPEN 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, make a solder bridge to short SL801 (OPEN/CLOSE) on the MAIN board in advance. NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK OR BASE UNIT SL801 (OPEN/CLOSE) – MAIN Board (Conductor Side) – SECTION 1 SERVICING NOTES