HT-NT3 - Sony Audio Service Manual (repair manual). Page 4

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HT-NT3
4
1. 
SERVICING  NOTES 
 .............................................  
5
2. DISASSEMBLY
2-1. Disassembly 
Flow 
...........................................................   9
2-2.  Front Panel (Left, Right, Center) Section-1 ....................   10
2-3.  Front Panel (Left, Right, Center) Section-2 ....................   11
2-4. CARD 
WLAN/BT 
COMBO 
...........................................  12
2-5.  KEY Board, IR TXL Board, IR TXR Board, WS CHUKEI 
Board, RC-S730 (WW) ...................................................   13
2-6.  Loudspeaker (6 cm)-080-12 (L-ch, R-ch), 
Mounted Board (Left, Right) ..........................................   14
2-7.  Power Cord, MB-1407 Board Section ............................   15
2-8.  Switching Regulator (3L405W), AUDIO IO Board .......   16
2-9. AMP 
Board 
.....................................................................  17
2-10. MB-1407 Board ..............................................................   18
3. 
TEST  MODE 
 ............................................................   19
4. TROUBLESHOOTING 
 ..........................................   27
5. DIAGRAMS
5-1.  Block Diagram - HDMI/USB/NETWORK Section - .....   28
5-2.  Block Diagram - MEMORY/AUDIO/AMP Section - ....   29
5-3.  Block Diagram - PANEL/POWER SUPPLY Section - ..   30
5-4.  Printed Wiring Board - MB-1407 Board 
(suffi x 12 (EXCEPT AEP, UK, RU, AUS)) - ..................   32
5-5.  Printed Wiring Board - MB-1407 Board 
(suffi x 23 (AEP, UK, RU, AUS)) - .................................   33
5-6.  Schematic Diagram - MB-1407 Board (1/12) - ..............   34
5-7.  Schematic Diagram - MB-1407 Board (2/12) - ..............   35
5-8.  Schematic Diagram - MB-1407 Board (3/12) - ..............   36
5-9.  Schematic Diagram - MB-1407 Board (4/12) - ..............   37
5-10.  Schematic Diagram - MB-1407 Board (5/12) - ..............   38
TABLE  OF  CONTENTS
5-11.  Schematic Diagram - MB-1407 Board (6/12) - ..............   39
5-12.  Schematic Diagram - MB-1407 Board (7/12) - ..............   40
5-13.  Schematic Diagram - MB-1407 Board (8/12) - ..............   41
5-14.  Schematic Diagram - MB-1407 Board (9/12) - ..............   42
5-15.  Schematic Diagram - MB-1407 Board (10/12) - ............   43
5-16.  Schematic Diagram - MB-1407 Board (11/12) - ............   44
5-17.  Schematic Diagram - MB-1407 Board (12/12) - ............   45
5-18.  Printed Wiring Board - AMP Board - .............................   46
5-19.  Schematic Diagram - AMP Board - ................................   47
5-20.  Printed Wiring Board - AUDIO IO Board - ....................   48
5-21.  Schematic Diagram - AUDIO IO Board - ......................   48
5-22.  Printed Wiring Board - WS CHUKEI Board - ................   49
5-23.  Schematic Diagram - WS CHUKEI Board - ..................   49
5-24.  Printed Wiring Board - OLED CHUKEI Board - ...........   50
5-25.  Schematic Diagram - OLED CHUKEI Board - ..............   50 
5-26.  Printed Wiring Board - IR TXL Board - .........................   51
5-27.  Schematic Diagram - IR TXL Board - ............................   51
5-28.  Printed Wiring Board - IR TXR Board - .........................   51
5-29.  Schematic Diagram - IR TXR Board - ...........................   51 
5-30.  Printed Wiring Board - KEY Board -..............................   52
5-31.  Schematic Diagram - KEY Board - ................................   52
6. 
EXPLODED  VIEWS
6-1. Overall 
Section 
...............................................................  78
6-2.  Front Panel Section .........................................................   79
6-3.  Cabinet Section 1 ............................................................   80
6-4.  Cabinet Section 2 ............................................................   81
6-5.  MB-1407 Board Section .................................................   82
7. 
ELECTRICAL  PARTS  LIST 
 ..............................   83
Accessories are given in the last of the electrical parts list.
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.
ATTENTION  AU  COMPOSANT  AYANT  RAPPORT  
À  LA  SÉCURITÉ!
LES  COMPOSANTS  IDENTIFIÉS  PAR  UNE  MARQUE  
0  SUR  
LES  DIAGRAMMES  SCHÉMATIQUES  ET  LA  LISTE  DES  
PIÈCES  SONT  CRITIQUES  POUR  LA  SÉCURITÉ  DE  FONC-
TIONNEMENT.  NE  REMPLACER  CES  COMPOSANTS  QUE  
PAR  DES  PIÈCES  SONY  DONT  LES  NUMÉROS  SONT  DON-
NÉS  DANS  CE  MANUEL  OU  DANS  LES  SUPPLÉMENTS  
PUBLIÉS  PAR  SONY.
Ver. 1.1
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