NW-HD5 - Sony Audio Service Manual (repair manual). Page 2

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2
NW-HD5
TABLE  OF  CONTENTS
1.
SERVICING  NOTES
...............................................
3
2.
GENERAL
...................................................................
4
3.
DISASSEMBLY
3-1.
Disassembly Flow ...........................................................
5
3-2.
Battery Case Lid ..............................................................
6
3-3.
Cabinet (Main) Block Assy .............................................
6
3-4.
Cabinet (Upper) Block Assy ............................................
7
3-5.
HDD Unit ........................................................................
7
3-6.
MAIN Board Section .......................................................
8
3-7.
MAIN Board ....................................................................
8
3-8.
Position of Ferrite Core ...................................................
9
4.
TEST  MODE
.............................................................. 10
5.
DIAGRAMS
5-1.
Block Diagram – MAIN Section (1/2) – ......................... 18
5-2.
Block Diagram – MAIN Section (2/2) – ......................... 19
5-3.
Block Diagram – KEY/POWER SUPPLY Section – ...... 20
5-4.
Printed Wiring Board
– MAIN Board (Component Side) – ............................... 22
5-5.
Printed Wiring Board
– MAIN Board (Conductor Side) – ................................. 23
5-6.
Schematic Diagram – MAIN Board (1/7) – .................... 24
5-7.
Schematic Diagram – MAIN Board (2/7) – .................... 25
5-8.
Schematic Diagram – MAIN Board (3/7) – .................... 26
5-9.
Schematic Diagram – MAIN Board (4/7) – .................... 27
5-10. Schematic Diagram – MAIN Board (5/7) – .................... 28
5-11. Schematic Diagram – MAIN Board (6/7) – .................... 29
5-12. Schematic Diagram – MAIN Board (7/7) – .................... 30
5-13. Printed Wiring Board – HDD Board – ............................ 31
5-14. Schematic Diagram – HDD Board – ............................... 31
6.
EXPLODED  VIEW
6-1.
Overall Section ................................................................ 44
6-2.
Main Section .................................................................... 45
7.
ELECTRICAL  PARTS  LIST
................................ 46
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.
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  PUBLISHED  BY  SONY.
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