CMT-BT60, CMT-BT60B, CMT-BT80W, CMT-BT80WB - 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)

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

s

Windows, the Windows logo, and Windows 
Media are either registered trademarks or 

s

“WALKMAN” and “WALKMAN” logo are
registered trademarks of Sony Corporation. 

trademarks of Microsoft Corporation in the 
United States and/or other countries.

s

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.

s

AirPlay, the AirPlay logo, iPad, iPhone, iPod, 
iPod classic, iPod nano, and iPod touch are 
trademarks of Apple Inc., registered in the U.S. 
and other countries.

s

“

” is a mark of the Wi-Fi Alliance.

s

Wi-Fi®, Wi-Fi Protected Access® and Wi-Fi 
Alliance® are registered marks of the Wi-Fi 
Alliance.

s

Wi-Fi CERTIFIED™, WPA™, WPA2™ and Wi-Fi 
Protected Setup™ are marks of the Wi-Fi 
Alliance.

s

DLNA™, the DLNA Logo and DLNA CERTIFIED™ 
are trademarks, service marks, or certification 
marks of the Digital Living Network Alliance.

s

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

s

The BLUETOOTH® word mark and logos are 
owned by the BLUETOOTH SIG, Inc. and any use 
of such marks by Sony Corporation is under 
license.

s

The N Mark is a trademark or registered 
trademark of NFC Forum, Inc. in the United 
States and in other countries.

s

Android is a trademark of Google Inc.

s

“Xperia” and “Xperia Tablet” are trademarks of 
Sony Mobile Communications AB.

s

The system names and product names indicated 
in this manual are generally the trademarks or 
registered trademarks of the manufacturer.
™ and ® marks are omitted in this manual.

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

0  OR  DOTTED  LINE  

0  ON  THE  SCHEMATIC  DIAGRAMS  AND  IN  

0  SUR  

This appliance is 
classified as a CLASS 1 
LASER product based 
on GB7247.1-2012. This 
marking is located on 
the bottom exterior of 
the unit.