HT-NT3 - Sony Audio Service Manual (repair manual)

2015H81-1

© 

2015.08

•  All of the units included in the HT-NT3 (SA-NT3/SA-

WNT3) are required to confi rming operation of SA-NT3. 
Check in advance that you have all of the units.

HT-NT3

Bar Speaker (Active Speaker System)

SA-NT3

Subwoofer (Active Subwoofer)

SA-WNT3

– Continued on next page –

Photo: SA-NT3

Amplifi er section
US model only:
POWER OUTPUT AND TOTAL HARMONIC 
DISTORTION:
(FTC)
Front L + Front R:
 

With 4 ohms loads, both channels driven, from 

 

300 Hz – 20,000 Hz; rated 50 watts per channel 

 

minimum RMS power, with no more than 1% total 

 

harmonic distortion from 250 milliwatts to rated 

 output.
POWER OUTPUT (reference)
Front L/Front R:
 

133 W (per channel at 4 ohms, 1 kHz)

Except US model:
POWER OUTPUT (rated)
Front L + Front R:
 

60 W + 60 W (at 4 ohms, 1 kHz, 1% THD)

POWER OUTPUT (reference)
Front L/Front R:
 

133 W (per channel at 4 ohms, 1 kHz)

Inputs
 

HDMI IN 1*/2/3

 

TV (DIGITAL IN)

 ANALOG 

IN

Output
 

HDMI OUT* (ARC)

*  HDMI IN 1 and HDMI OUT jacks support HDCP 2.2 
  protocol. HDCP 2.2 is newly enhanced copyright 
  protection technology that is used to protect content 
  such as 4K movies.

HDMI section
Connector
 Type 

A 

(19pin)

 (USB) port:

 

Type A (For connecting USB memory, memory 

 

card reader, and digital still camera)

LAN section
LAN (100) terminal
 100BASE-TX 

Terminal

Wireless LAN section
Standards Compliance
 

IEEE 802.11 a/b/g/n

Frequency band
 

2.4 GHz, 5 GHz

BLUETOOTH section
Communication system
 BLUETOOTH 

Specifi cation version 3.0

Output
 BLUETOOTH 

Specifi cation Power Class 1

Maximum communication range
 

Line of sight approx. 30 m (98.4 ft)

1)

Frequency band
 2.4 

GHz

Modulation method
 

FHSS (Freq Hopping Spread Spectrum)

Compatible BLUETOOTH profi les

2)

 

A2DP 1.2 (Advanced Audio Distribution Profi le)

 

AVRCP 1.5 (Audio Video Remote Control Profi le)

Supported Codecs

3)

 SBC

4)

, AAC, LDAC

Transmission range (A2DP)
 

20 Hz – 20,000 Hz (Sampling frequency 44.1 kHz, 

 

48 kHz, 88.2 kHz, 96 kHz)

1)  The actual range will vary depending on factors such 

as obstacles between devices, magnetic fi elds around 
a microwave oven, static electricity, cordless phone, 
reception sensitivity, antenna’s performance, operating 
system, software application, etc.

2)  BLUETOOTH standard profi les indicate the purpose 

of BLUETOOTH communication between devices.

3)  Codec: Audio signal compression and conversion 

format

4) Subband Codec

Front L/Front R speaker section
Speaker system
 

2-way speaker system, Acoustic suspension

Speaker
 

Woofer: 65 mm (2 5/8 in) cone type, magnetic fl uid speaker ×2

 

Tweeter: 18 mm (23/32 in) dome type ×2

General
Power requirements
 

LA9 model only:

 

110 V – 240 V AC, 50/60 Hz

 

US, CND, TW models only:

 

120 V AC, 60 Hz

 

EA model only:

 

127 V – 240 V AC, 50/60 Hz

 

Except LA9, US, CND, TW, EA models:

 

220 V – 240 V AC, 50/60 Hz

Power consumption
 On: 

55 

W

 Standby: 
 0.3 

W

 

5.5 W (EXCEPT US, CND, LA9)

Dimensions (w/h/d) (approx.)
 

1,070 mm × 86 mm × 65 mm.

 

(42 1/4 in × 3 1/2 in × 2 5/8 in) incl.

 projecting 

parts

Mass (approx.)
 

3.1 kg (6 lb 14oz)

Communication system
 

Wireless Sound Specifi cation version 3.0

Frequency band
 

US, CND, AEP, UK, AUS, EA*, E3*, AR models only: 5.2 GHz, 5.8 GHz

 

SP, TW, LA9 models only: 5.8 GHz

 

RU model only: 5.2 GHz

 

* 5.2 GHz or 5.8 GHz may not be available in some countries/regions.

Modulation method
 DSSS

4096 × 2160p @ 59.94/60 Hz

*1

a

–

–

–

4096 × 2160p @ 50 Hz

*1

a

–

–

–

4096 × 2160p @ 23.98/24 Hz

*2

a

–

–

–

3840 × 2160p @ 59.94/60 Hz

*1

a

–

–

–

3840 × 2160p @ 50 Hz

*1

a

–

–

–

3840 × 2160p @ 29.97/30 Hz

*2

a

–

–

–

3840 × 2160p @ 25 Hz

*2

a

–

–

–

3840 × 2160p @ 23.98/24 Hz

*2

a

–

–

–

1920 × 1080p @ 59.94/60 Hz

a

–

a

a

1920 × 1080p @ 50 Hz

a

–

a

a

1920 × 1080p @ 29.97/30 Hz

a

a

a

a

1920 × 1080p @ 25 Hz

a

a

a

a

1920 × 1080p @ 23.98/24 Hz

a

a

a

a

1920 × 1080i @ 59.94/60 Hz

a

a

a

a

1920 × 1080i @ 50 Hz

a

a

a

a

1280 × 720p @ 59.94/60 Hz

a

a

a

a

1280 × 720p @ 50 Hz

a

a

a

a

1280 × 720p @ 29.97/30 Hz

a

a

a

a

1280 × 720p @ 23.98/24 Hz

a

a

a

a

720 × 480p @ 59.94/60 Hz

a

–

–

–

720 × 576p @ 50 Hz

a

–

–

–

640 × 480p @ 59.94/60 Hz

a

–

–

–

*1

 YCbCr 4:2:0/Supported 8-bit only

*2

 Supported 8-bit only

Supplied accessories
Remote control (1)
R03 (size AAA) batteries (2)
High Speed HDMI cable (1) (EXCEPT AEP, UK)
Optical digital cable (1) (AEP, UK)
Stands (2)
AC plug adaptor (2) (LA9)

Design and specifi cations are subject to change without notice.

• Abbreviation
 AR   

: 

Argentina 

model

 AUS  

: 

Australian 

model

  CND   : Canadian model
  E3 

 : 240V AC area in E model

  EA 

 : Saudi Arabia model

  LA9 

 : Latin-American model

  RU 

 : Russian model

  SP 

 : Singapore model

 TW   

: 

Taiwan 

model

• 

This system incorporates Dolby* Digital and the DTS** Digital Surround System.

  *  Manufactured under license from Dolby Laboratories. Dolby and the double-D 
    symbol are trademarks of Dolby Laboratories.
  ** For DTS patents, see http://patents.dts.com.
    Manufactured under license from DTS Licensing Limited. DTS, DTS-HD, the 
    Symbol, & DTS and the Symbol together are registered trademarks of DTS, 
    Inc. © DTS, Inc. All Rights Reserved.

• 

This system incorporates High-Defi nition Multimedia Interface (HDMI™) 

 technology.
  The terms HDMI and HDMI High-Defi nition Multimedia Interface, and the HDMI 
  Logo are trademarks or registered trademarks of HDMI Licensing LLC in the 
  United States and other countries.

• 

“BRAVIA” is a trademark of Sony Corporation.

• 

“PlayStation” is a registered trademark of Sony Computer Entertainment Inc.

• 

Wi-Fi

®

, Wi-Fi Protected Access

®

, Wi-Fi Alliance

®

 and Wi-Fi CERTIFIED

 Miracast

®

 are registered trademarks of Wi-Fi Alliance

®

.

• 

Wi-Fi CERTIFIED™, WPA™, WPA2™, Wi-Fi Protected Setup™ and Miracast™ 

  are trademarks of Wi-Fi Alliance

®

.

• 

The N Mark is a trademark or registered trademark of NFC Forum, Inc. in the 

  United States and in other countries.

• 

Android™ is a trademark of Google Inc.

• 

Google Play™ is a trademark of Google Inc.

• 

Google Cast™ is a trademark of Google Inc.

• 

Google Cast™ Ready and the Google Cast Ready badge are trademarks of Google 

 Inc.

• 

“Xperia” is a trademark of Sony Mobile Communications AB.

• 

The BLUETOOTH

®

 word mark and logos are registered trademarks owned by 

  Bluetooth SIG, Inc. and any use of such marks by Sony Corporation is under 
  license. Other trademarks and trade names are those of their respective owners.

• 

LDAC™ and LDAC logo are trademarks of Sony Corporation.

• 

“DSEE HX” is a trademark of Sony Corporation.

• 

MPEG Layer-3 audio coding technology and patents licensed from Fraunhofer IIS 

 and 

Thomson.

• 

Windows Media is either a registered trademark or trademark of Microsoft 

  Corporation in the United States and/or other countries.
  This product is protected by certain intellectual property rights of Microsoft 
  Corporation. Use or distribution of such technology outside of this product is 
  prohibited without a license from Microsoft or an authorized Microsoft subsidiary.

• 

Opera

®

 Devices SDK from Opera Software ASA. Copyright 1995-2013 Opera 

  Software ASA. All rights reserved.

• 

“ClearAudio+” is a trademark of Sony Corporation.

• 

“x.v.Colour” and “x.v.Colour” logo are trademarks of Sony Corporation.

• 

Apple, the Apple logo, iPhone, iPod, iPod touch, and Retina are trademarks of 

  Apple Inc., registered in the U.S. and other countries. App Store is a service mark of 
 Apple 

Inc.

  “Made for iPod,” and “Made for iPhone” mean that an electronic accessory has been 
  designed to connect specifi cally to iPod or iPhone, respectively, and has been 
 certifi ed by the developer to meet Apple performance standards. Apple is not 
  responsible for the operation of this device or its compliance with safety and 
  regulatory standards. Please note that the use of this accessory with iPod or iPhone 
  may affect wireless performance.

  The compatible iPod/iPhone models are as follows. Update your iPod/iPhone with 
  the latest software before using with the system.
  BLUETOOTH technology works with:
 – iPhone
    iPhone 6 Plus/iPhone 6/iPhone 5s/iPhone 5c/iPhone 5/iPhone 4s/iPhone 4/
   iPhone 

3GS

 – iPod 

touch

    iPod touch (5th generation)/iPod touch (4th generation)

• 

All other trademarks are trademarks of their respective owners.

• 

Other system and product names are generally trademarks or registered trademarks 

  of the manufacturers. ™ and ® marks are not indicated in this document.

This product contains software that is subject to the GNU General Public License 
(“GPL”) or GNU Lesser General Public License (“LGPL”). These establish that 
customers have the right to acquire, modify, and redistribute the source code of said 
software in accordance with the terms of the GPL or the LGPL.

For details of the GPL, LGPL and other software licenses, please refer to [Software 
License Information] in [System Settings] of the [Setup] menu on the product.

The source code for the software used in this product is subject to the GPL and LGPL, 
and is available on the Web. To download, please access the following:
URL:
http://oss.sony.net/Products/Linux

Please note that Sony cannot answer or respond to any inquiries regarding the content 
of this source code.

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.

SAFETY  CHECK-OUT
After correcting the original service problem, perform the follow-
ing safety check before releasing the set to the customer:
Check the antenna terminals, metal trim, “metallized” knobs, 
screws, and all other exposed metal parts for AC leakage.
Check leakage as described below.

LEAKAGE  TEST
The AC leakage from any exposed metal part to earth ground and 
from all exposed metal parts to any exposed metal part having a 
return to chassis, must not exceed 0.5 mA (500 microamperes.). 
Leakage current can be measured by any one of three methods.
1.  A commercial leakage tester, such as the Simpson 229 or RCA 

WT-540A. Follow the manufacturers’ instructions to use these 
instruments.

2.  A battery-operated AC milliammeter. The Data Precision 245 

digital multimeter is suitable for this job.

3.  Measuring the voltage drop across a resistor by means of a 

VOM or battery-operated AC voltmeter. The “limit” indication 
is 0.75 V, so analog meters must have an accurate low-voltage 
scale. The Simpson 250 and Sanwa SH-63Trd are examples 
of a passive VOM that is suitable. Nearly all battery operated 
digital multimeters that have a 2 V AC range are suitable. (See 
Fig. A)

 .............................................  

5

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

 ............................................................   19

 ..........................................   27

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

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

6-1. 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

 ..............................   83

Accessories are given in the last of the electrical parts list.

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