HT-XT3 - Sony Audio Service Manual (repair manual). Page 2

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)

0  OR  DOTTED  LINE  

0  ON  THE  SCHEMATIC  DIAGRAMS  AND  IN  

0  SUR  

Copyrights and Trademarks
•  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.
•  “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.Color” and “x.v.Color” logo are trademarks of Sony Corporation.
•  Apple, the Apple logo, iPhone, iPod, iPod touch, and Retina are trademarks of Apple Inc., regis-

tered 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 compli-
ance with safety and regulatory standards. Please note that the use of this accessory with iPod or 
iPhone may affect wireless performance.

Compatible iPod/iPhone models
The compatible iPod/iPhone models are as follows. Update your iPod/iPhone with the latest soft-
ware 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.

Notice on GNU GPL/LGPL applied software and other Open Source Softwares
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 avail-
able 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.