Sony d nf 400 service manual

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3 D-NF400/NF401 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 -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. TABLE OF CONTENTS 1. SERVICING NOTES ............................................... 4 2. GENERAL ................................................................... 6 3. DISASSEMBLY 3-1. Disassembly Flow........................................................... 7 3-2. Cabinet (Low er) Section................................................. 7 3-3. Optical Pick-up Assy (CDM-3325ER2) ......................... 8 3-4. MAIN Board ................................................................... 8 3-5. Liquid Crystal Display Panel (LCD2001), SWITCH Board ............................................................... 9 4. TEST MODE ............................................................... 10 5. ELECTIRICAL CHECK .......................................... 11 6. DIAGRAMS 6-1. Block Diagram – MAIN Section –................................ 12 6-2. Block Diagram – TUNER Section –............................. 13 6-3. Note for Printed Wiring Boards and Schematic Diagrams ....................................................... 14 6-4. Schematic Diagram – MAIN Board (1/7)..................... 15 6-5. Schematic Diagram – MAIN Board (2/7)..................... 16 6-6. Schematic Diagram – MAIN Board (3/7)..................... 17 6-7. Schematic Diagram – MAIN Board (4/7)..................... 18 6-8. Schematic Diagram – MAIN Board (5/7)..................... 19 6-9. Schematic Diagram – MAIN Board (6/7)..................... 20 6-10. Schematic Diagram – MAIN Board (7/7)..................... 21 6-11. Printed Wiring Board – MAIN Board (Component Side) –.............................. 22 6-12. Printed Wiring Board – MAIN Board (Conductor Side) –................................ 23 6-13. Printed Wiring Board – SWITCH Board –................... 24 6-14. Schematic Diagram – SWITCH Board –...................... 25 7. EXPLODED VIEWS 7-1. Cabinet (Inner) Section................................................... 36 7-2. Cabinet (Upper) Section................................................. 37 7-3. Cabinet (Low er) Section................................................. 38 7-4. Optical Pick-up Section (CDM-3325ER2)..................... 39 8. ELECTRICAL PARTS LIST ............................... 40 CAUTION Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous ra- diation exposure. On AC power adaptor - Use only the AC power adaptor supplied. If your CD player is not supplied with the one, use the AC-E45HG AC power adaptor. Do not use any other AC power adaptor. It may cause a malfunction. Polarity of the plug This appliance is classified as a CLASS 1 LASER product. The CLASS 1 LASER PRODUCT MARKING is located on the rear exterior. About CD-Rs/RWs This CD player can play CD-Rs/RWs recorded in the ATRAC3plus/ ATRAC3, MP3 or CDDA*format, but playback capability may va ry depending on the quality of the disc and the conditionof the recording device. *CDDA is the abbreviation for Compact Disc Digital Audio. It is a recording standard used for the AudioCDs. 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 oc- cur 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.