HT-ST7 - 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  

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.

** Manufactured under license under U.S. Patent Nos: 5,956,674; 

5,974,380; 6,226,616; 6,487,535; 7,212,872; 7,333,929; 7,392,195; 
7,272,567 & other U.S. and worldwide patents issued & pending. DTS-
HD, the Symbol, & DTS-HD and the Symbol together are registered 
trademarks & DTS-HD Master Audio is a trademark of DTS, Inc. 
Product includes software. © DTS, Inc. All Rights Reserved.

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.

This system incorporates High-Definition Multimedia Interface (HDMI™) 
technology. 
The terms HDMI and HDMI High-Definition Multimedia Interface, and the 
HDMI Logo are trademarks or registered trademarks of HDMI Licensing LLC 
in the United States and other countries.

“BRAVIA” logo is a trademark of Sony Corporation.

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

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.

© 2012 CSR plc and its group companies.
The aptX® mark and the aptX logo are trade marks of CSR plc or one of its 
group companies and may be registered in one or more jurisdictions.

Other trademarks and trade names are those of their respective owners.

Design and specifications are subject to change without notice 

Standby power consumption: 0.5 W 
or less (Bar Speaker), 0.5 W or less 
(Subwoofer)
Over 85% power efficiency of 
amplifier block is achieved with the 
full digital amplifier, S-Master.

4096 × 2160p @ 23.98/24 Hz

3840 × 2160p @ 29.97/30 Hz

3840 × 2160p @ 25 Hz

3840 × 2160p @ 23.98/24 Hz

1920 × 1080p @ 59.94/60 Hz

1920 × 1080p @ 50 Hz

1920 × 1080p @ 29.97/30 Hz

1920 × 1080p @ 25 Hz

1920 × 1080p @ 23.98/24 Hz

1920 × 1080i @ 59.94/60 Hz

1920 × 1080i @ 50 Hz

1280 × 720p @ 59.94/60 Hz

1280 × 720p @ 50 Hz

1280 × 720p @ 29.97/30 Hz

1280 × 720p @ 23.98/24 Hz

720 × 480p @ 59.94/60 Hz  

720 × 576p @ 50 Hz

640 × 480p @ 59.94/60 Hz 

Grille frame (1)
Remote control (1)
R03 (size AAA) batteries (2)
Digital optical cable for a TV (1)
IR blaster (1)
Stands (2) and screws (2)
Wireless transceivers (2)
Operating Instructions (1)
Reference Guide (1)