HBD-NF7220 - Sony Audio Service Manual (repair manual). Page 2

CAUTION
Use of controls or adjustments or performance of procedures 
other than those specifi ed herein may result in hazardous radia-
tion exposure.

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)

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.

Copyrights and Trademarks
•  This system incorporates with 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.

•  Java is a trademark of Oracle and/or its affi liates.
•  DVD Logo is a trademark of DVD Format/Logo Licensing Corporation.
•  “Blu-ray Disc”, “Blu-ray”, “Blu-ray 3D”, “BD-LIVE”, “BONUSVIEW”, and logos are 

trademarks of the Blu-ray Disc Association.

•  “Blu-ray Disc”, “DVD+RW”, “DVD-RW”, “DVD+R”, “DVD-R”, “DVD VIDEO”, and “CD” 

logos are trademarks.

•  “Super Audio CD” is a trademark.
•  App Store is a service mark of Apple Inc.
•  “BRAVIA” is a trademark of Sony Corporation.
•  “AVCHD 3D/Progressive” and the “AVCHD 3D/Progressive” logo are trademarks of Panasonic 

Corporation and Sony Corporation.

• 

, “XMB”, and “xross media bar” are trademarks of Sony Corporation and Sony Computer 

Entertainment Inc.

•  “Playstation” is a registered trademark of Sony Computer Entertainment Inc.
•  “Sony Entertainment Network” logo and “Sony Entertainment Network” are trademarks of Sony 

Corporation.

•  Music and video recognition technology and related data are provided by Gracenote

®

. Gracenote 

is the industry standard in music recognition technology and related content delivery. For more 
information, please visit www.gracenote.com.

 

CD, DVD, Blu-ray Disc, and music and video-related data from Gracenote, Inc., copyright 
© 2000-present Gracenote. Gracenote Software, copyright © 2000-present Gracenote. One 
or more patents owned by Gracenote apply to this product and service. See the Gracenote 
website for a nonexhaustive list of applicable Gracenote patents. Gracenote, CDDB, MusicID, 
the Gracenote logo and logotype, and the “Powered by Gracenote” logo are either a registered 
trademark or a trademark of Gracenote, Inc. in the United States and/or other countries.

• Wi-Fi

®

, Wi-Fi Protected Access

®

 and Wi-Fi Alliance

®

 are registered trademarks of Wi-Fi 

Alliance.

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

CERTIFIED 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 

®

 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.

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

Thomson.

•  This product incorporates proprietary technology under license from Verance Corporation and 

is protected by U.S. Patent 7,369,677 and other U.S. and worldwide patents issued and pending 
as well as copyright and trade secret protection for certain aspects of such technology. Cinavia 
is a trademark of Verance Corporation. Copyright 2004-2010 Verance Corporation. All rights 
reserved by Verance. Reverse engineering or disassembly is prohibited.

•  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.

  Content owners use Microsoft PlayReady™ content access technology to protect their 

intellectual property, including copyrighted content. This device uses PlayReady technology to 
access PlayReady-protected content and/or WMDRM-protected content. If the device fails to 
properly enforce restrictions on content usage, content owners may require Microsoft to revoke 
the device’s ability to consume PlayReady-protected content. Revocation should not affect 
unprotected content or content protected by other content access technologies. Content owners 
may require you to upgrade PlayReady to access their content. If you decline an upgrade, you 
will not be able to access content that requires the upgrade.

•  DLNA™, the DLNA Logo and DLNA CERTIFIED™ are trademarks, service marks, or 

certifi cation marks of the Digital Living Network Alliance.

• Opera

®

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

All rights reserved.

•  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.

Pick-up unit of this appliance is 
classified as a CLASS 3R LASER product. 
Visible and invisible laser radiation is 
emitted when the laser protective 
housing is opened, so be sure to avoid 
direct eye exposure.
This marking is located on the bottom 
exterior of the main unit.

This appliance is classified as a CLASS 1 
LASER product. This marking is located 
on the bottom exterior of the main unit.