MHC-V7D - Sony Audio Service Manual (repair manual). Page 2

0 OR  DOTTED  LINE  

0 ON  THE  SCHEMATIC  DIAGRAMS  AND  IN  

SAFETY  CHECK-OUT
After correcting the original service problem, perform the following 
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 2V AC range are suitable. (See

 Fig. 

A)

•  

 is a trademark of DVD Format/Logo Licensing Corporation.

•  

“DVD+RW”, “DVD-RW”, “DVD+R”, “DVD-R”, “DVD VIDEO”, and 
the “CD” logos are trademarks.

•   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.

•   “WALKMAN” and “WALKMAN” logo are registered trademarks of 

Sony Corporation.

•  This system incorporates Dolby* Digital.
  

* 

Manufactured under license from Dolby Laboratories.

   

Dolby and the double-D symbol are trademarks of Dolby 
Laboratories.

•  

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.

•   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.

•   Apple, the Apple logo, iPhone, and iPod touch 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 specifically to iPod or 
iPhone, respectively, and has been certified 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.

•   THIS PRODUCT IS LICENSED UNDER THE MPEG-4 VISUAL 

PATENT PORTFOLIO LICENSE FOR THE PERSONAL AND 
NON-COMMERCIAL USE OF A CONSUMER FOR

  (i)  ENCODING VIDEO IN COMPLIANCE WITH THE MPEG-4 

VISUAL STANDARD (“MPEG-4 VIDEO”)

 AND/OR

  (ii) 

 

DECODING MPEG-4 VIDEO THAT WAS ENCODED BY 
A CONSUMER ENGAGED IN A PERSONAL AND NON-
COMMERCIAL ACTIVITY AND/OR WAS OBTAINED FROM 
A VIDEO PROVIDER LICENSED TO PROVIDE MPEG-4 
VIDEO.

   NO LICENSE IS GRANTED OR SHALL BE IMPLIED FOR ANY 

OTHER USE. ADDITIONAL INFORMATION INCLUDING THAT 
RELATING TO PROMOTIONAL, INTERNAL AND COMMER-
CIAL USES AND LICENSING MAY BE OBTAINED FROM MPEG 
LA, L.L.C.

 HTTP://WWW.MPEGLA.COM

•   All other trademarks are trademarks of their respective owners.
•   In this manual, ™ and ® marks are not specified.

•

 Abbreviation

 AR 

: 

Argentina 

model

 AUS  : 

Australian 

model

 E4 

: 

African 

model

  E93 

: 240 V AC area in E model

 LA9  : 

Latin-American 

model

 MY 

: 

Malaysia 

model

 RU 

: 

Russian 

model

 TH 

: 

Thai 

model