HT-ST9 - Sony Audio Service Manual (repair manual)

2015F33-1

© 

2015.06

•  All of the units included in the HT-ST9 (SA-

ST9/SA-WST9/Remote control) are required 
to confi rming operation of SA-ST9. Check in 
advance that you have all of the units.

HT-ST9

Bar Speaker (Active Speaker System)

SA-ST9

Subwoofer (Active Subwoofer)

SA-WST9

•  Please refer to service manual separately issued for Subwoofer.

Photo: SA-ST9

Note:
Be sure to keep your PC used for service and 
checking of this unit always updated with the 
latest version of your anti-virus software.
In case a virus affected unit was found during 
service, contact your Service Headquarters. 

Amplifier section
U.S. models:
POWER OUTPUT AND TOTAL HARMONIC DISTORTION:
(FTC)

Front L + Front R:
With 6 ohms loads, both channels driven, from 200 - 20,000 Hz; 
rated 25 Watts per channel minimum RMS power, with no more than 
1% total harmonic distortion from 250 milliwatts to rated output.

POWER OUTPUT (reference)

Front L/Front R speaker blocks: 75 Watts (per channel at 6 ohms, 1 kHz)
Center speaker block: 75 Watts (per channel at 6 ohms, 1 kHz)
Center tweeter block: 75 Watts (per channel at 6 ohms, 10 kHz)

Canadian models:

Chinese model:

POWER OUTPUT (rated)

Front L + Front R: 45 W + 45 W 
(at 6 ohms, 1 kHz, 1% THD)

POWER OUTPUT (reference)

Front L/Front R speaker blocks: 75 Watts (per channel at 6 ohms, 1 kHz)
Center speaker block: 75 Watts (per channel at 6 ohms, 1 kHz)
Center tweeter block: 75 Watts (per channel at 6 ohms, 10 kHz)

Inputs

HDMI IN 1*/2/3
DIGITAL IN (TV)
ANALOG IN

Output

HDMI OUT* (ARC)

* HDMI IN 1 and HDMI OUT (ARC) jacks support HDCP 2.2 protocol. 

HDCP 2.2 is newly enhanced copyright protection technology that is 
used to protect content such as 4K movies.

HDMI section
Connector

Type A (19pin)

 (USB) port:

Type A (For connecting USB memory, memory card reader, digital still 
camera)

LAN section
LAN (100) terminal

100BASE-TX Terminal

BLUETOOTH section 
Communication system 

BLUETOOTH Specification version 3.0

Output 

BLUETOOTH Specification Power Class 1

Maximum communication range 

Line of sight approx. 30 m (98.4 ft)

1)

 

Maximum number of devices to be registered

9 devices

Frequency band 

2.4 GHz band (2.4GHz - 2.4835 GHz) 

Modulation method 

FHSS (Freq Hopping Spread Spectrum) 

Compatible BLUETOOTH profiles

2)

 

A2DP 1.2 (Advanced Audio Distribution Profile)
AVRCP 1.5 (Audio Video Remote Control Profile)

Supported Codecs

3)

 

SBC

4)

, AAC

5)

, LDAC

Transmission range (A2DP) 

20 Hz - 20,000 Hz (Sampling frequency 44.1 kHz) 

1)

The actual range will vary depending on factors such as obstacles 
between devices, magnetic fields around a microwave oven, static 
electricity, cordless phone use, reception sensitivity, the operating 
system, software applications, etc.

2)

BLUETOOTH standard profiles indicate the purpose of BLUETOOTH 
communication between devices.

3)

Codec: Audio signal compression and conversion format

4)

Subband Codec 

5)

Advanced Audio Coding

Front L/Front R speaker blocks
Speaker system

2-way coaxial speaker system, Acoustic suspension

Speaker 

Woofer: 65 mm (2 5/8 in) cone type, Magnetic fluid speaker 
Tweeter: 18 mm (23/32 in) soft dome type

Center speaker block
Speaker system

Center
2-way coaxial speaker system, Acoustic suspension 
Satellite
Full range speaker system, Acoustic suspension

Speaker (5 speakers)

Center
Woofer: 65 mm (2 5/8 in) cone type, Magnetic fluid speaker
Tweeter: 18 mm (23/32 in) soft dome type
Satellite
65 mm (2 5/8 in) cone type, Magnetic fluid speaker

POWER OUTPUT (rated)

Front L + Front R: 50 W + 50 W 
(at 6 ohms, 1 kHz, 1% THD)

POWER OUTPUT (reference)

Front L/Front R speaker blocks: 75 Watts (per channel at 6 ohms, 1 kHz)
Center speaker block: 75 Watts (per channel at 6 ohms, 1 kHz)
Center tweeter block: 75 Watts (per channel at 6 ohms, 10 kHz)

POWER OUTPUT

Front L/Front R speaker blocks: 30 Watts (per channel at 6 ohms, 1 kHz) 
Center speaker block: 30 Watts (per channel at 6 ohms, 1 kHz)
Center tweeter block: 30 Watts (per channel at 6 ohms, 10 kHz)

Other models:

Wireless LAN section
Standards Compliance

IEEE 802.11 a/b/g/n

Frequency band (Except Chinese model)

2.4 GHz, 5 GHz

Frequency band (Chinese model)

2.4 GHz - 2.4835 GHz
5.15 GHz - 5.35 GHz
5.725 GHz - 5.85 GHz

General
Power requirements

120 V AC, 60 Hz (US and Canadian models)

Power consumption

On: 60 W
Standby mode: 0.5 W or less
BLUETOOTH Standby mode: 0.5 W or less (Except AEP and UK models)

120 V AC, 50 Hz/60 Hz (Taiwan model)

220 V - 240 V AC, 50 Hz/60 Hz (Other models)

Dimensions (approx.) (w/h/d)

1,130 mm × 88 mm × 128 mm (44 1/2 in × 3 1/2 in × 5 1/8 in)
(without grille frame, without stands, including projection portion)
1,130 mm × 88 mm × 133 mm (44 1/2 in × 3 1/2 in × 5 1/4 in)
(with grille frame, without stands)
1,130 mm × 100 mm × 129 mm (44 1/2 in × 4 in × 5 1/8 in)
(without grille frame, with stands, including projection portion)
1,130 mm × 101 mm × 136 mm (44 1/2 in × 4 in × 5 3/8 in)
(with grille frame, with stands)

Mass (approx.)

6.8 kg (14 lb 15 7/8 oz) (without grille frame, without stands)

120 V - 240 V AC, 50 Hz/60 Hz (Latin American model)

Networked Standby (all wired network ports connected, all wireless 
network ports activated): 7.3 W (AEP and UK models)

Communication system 

Wireless Sound Specification version 3.0

Modulation method

DSSS

The compatible iPod/iPhone models are as follows. Update your iPod/
iPhone with the latest software before using with the system.

BLUETOOTH technology works with:
iPhone 6 Plus/iPhone 6/iPhone 5s/iPhone 5c/iPhone 5/iPhone 4s/
iPhone 4/iPhone 3GS
iPod touch (5th generation)/iPod touch (4th generation)

Frequency band (Russian model)

5.2 GHz (5.180 GHz - 5.240 GHz)

Frequency band (Chinese model)

5.15 GHz - 5.25 GHz

5.8 GHz (5.736 GHz - 5.814 GHz)

Frequency band (Latin American, Singapore and Taiwan models)

Frequency band (Other models)

5.2 GHz (5.180 GHz - 5.240 GHz)
5.8 GHz (5.736 GHz - 5.814 GHz)

– Continued on next page –

1)

YCbCr 4:2:0/Supports 8-bit only

2)

Supports 8-bit only

Grille frame (1)
Remote control (1)
R03 (size AAA) batteries (2)
HDMI cable (High Speed type) (1) (Except AEP and UK models only)
Optical digital cable for a TV (1) (AEP and UK models only)
Stands* (2) and screws* (2)

* Refer to the Operating Instructions on how to use these items.

Startup Guide (1)
Operating Instructions (1)

Design and specifications are subject to change without notice.

4096 × 2160p @ 59.94/60Hz

1)

4096 × 2160p @ 50 Hz

1)

4096 × 2160p @ 23.98/24 H z

2)

3840 × 2160p @ 59.94/60Hz

1)

3840 × 2160p @ 50 Hz

1)

3840 × 2160p @ 29.97/30 Hz

2)

3840 × 2160p @ 25 Hz

2)

3840 × 2160p @ 23.98/24 Hz

2)

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

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, and DTS-HD 
Master Audio is a trademark of DTS, Inc. © 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. Other trademarks and trade names are those of their 
respective owners.

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.

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

Android and Google Play are trademarks of Google Inc.

Google Cast is a trademark of Google Inc.

Google Cast Ready and the Google Cast Ready badge are trademarks of 
Google Inc.

“Xperia” is a trademark of Sony Mobile Communications AB.

Apple, the Apple logo, iPhone, iPod, iPod touch, and Retina 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.

“BRAVIA” logo is a trademark of Sony Corporation.

“ClearAudio+” is a trademark of Sony Corporation.

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

“PlayStation

®

” is a registered trademark of Sony Computer Entertainment 

Inc.

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.

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.

LDAC™ and LDAC logo are trademarks of Sony Corporation.

LDAC is an audio coding technology developed by Sony that enables the 
transmission of High-Resolution (Hi-Res) Audio content, even over a 
Bluetooth connection. Unlike other Bluetooth compatible coding 
technologies such as SBC, it operates without any down-conversion of 
the Hi-Res Audio content*, and allows approximately three times more 
data** than those other technologies to be transmitted over a Bluetooth 
wireless network with unprecedented sound quality, by means of 
efficient coding and optimized packetization.
* excluding  DSD  format  contents
** in comparison with SBC (Subband Coding) when the bitrate of 

990 kbps (96/48 kHz) or 909 kbps (88.2/44.1 kHz) is selected

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 available 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.

“DSEE HX” is a trademark of Sony Corporation.

All other trademarks are trademarks of their respective owners.

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.

FLEXIBLE  CIRCUIT  BOARD  REPAIRING
• 

Keep the temperature of soldering iron around 270 °C during 
repairing.

• 

Do not touch the soldering iron on the same conductor of the 
circuit board (within 3 times).

• 

Be careful not to apply force on the conductor when soldering 
or unsoldering.

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  

 .............................................  

5

2-1. Disassembly 

Flow 

...........................................................  10

2-2.  Cover (Rear) Block .........................................................   12
2-3.  Rear Panel (L) Block ......................................................   13
2-4.  Rear Panel (R) Assy, Base Cover (Rear) ........................   14
2-5.  KEY Board, Button Assy ................................................   14
2-6.  Panel (Side L, R) .............................................................   15
2-7.  Panel (Bottom) Block .....................................................   16
2-8. Chassis 

Block-1 

..............................................................  17

2-9. Chassis 

Block-2 

..............................................................  18

2-10. AMP Board .....................................................................   19
2-11. IO Board .........................................................................   20
2-12. MB1406 Board ...............................................................   21
2-13.  Power Cord (AC1) ..........................................................   22
2-14. POWER Board ................................................................   23
2-15.  RF Modulator Block-1 ....................................................   24
2-16.  RF Modulator Block-2 ....................................................   25
2-17.  RF Modulator Block-3 ....................................................   26
2-18. USB Board ......................................................................   27
2-19.  WS Board, RF Modulator (RF1) ....................................   28
2-20.  Card WLAN/BT Combo (WIFI1)...................................   29
2-21.  Center Speaker Block .....................................................   30
2-22.  Front Speaker (R) Block .................................................   31
2-23.  Front Speaker (L) Block .................................................   32
2-24. Grille Assy ......................................................................   33
2-25.  NFC Module (NFC1) ......................................................   33
2-26.  DISPLAY Board Block-1 ...............................................   34
2-27.  DISPLAY Board Block-2 ...............................................   35
2-28.  DISPLAY Board, OLED Display (OLED1) ...................   36
2-29.  Loudspeaker (SP3, SP4) (R-ch)-1 ..................................   37
2-30.  Loudspeaker (SP3, SP4) (R-ch)-2 ..................................   38
2-31.  Loudspeaker (SP1, SP2) (L-ch)-1 ...................................   39
2-32.  Loudspeaker (SP1, SP2) (L-ch)-2 ...................................   40
2-33.  Loudspeaker (SP5, SP6, SP7, SP8) (Center) ..................   41
2-34.  Loudspeaker (SP9, SP10) (Center)-1 ..............................   42
2-35.  Loudspeaker (SP9, SP10) (Center)-2 ..............................   43
2-36.  Connection Cable with Speaker (SPC3, SPC4) ..............   44

 ............................................................   45

 ..........................................   53

5-1.   Block Diagram - HDMI Section - ...................................   57
5-2.   Block Diagram - MEMORY/MAIN Section - ................   58
5-3.   Block Diagram - AMP Section - .....................................   59
5-4.   Block Diagram 

- PANEL/POWER SUPPLY Section - ............................   60

5-5.   Printed Wiring Board - MB1406 Board - .......................   62
5-6.   Printed Wiring Board - AMP Board - .............................   63
5-7.   Schematic Diagram - AMP Section (1/2) - .....................   64
5-8.   Schematic Diagram - AMP Section (2/2) - .....................   65
5-9.   Printed Wiring Boards - IO/USB Section - .....................   66
5-10.  Schematic Diagram - IO/USB Section - .........................   66
5-11.  Printed Wiring Board - WS Board - ................................   67
5-12.  Schematic Diagram - WIRELESS Section - ...................   67
5-13.  Printed Wiring Boards - DISPLAY Section - .................   68
5-14.  Schematic Diagram - DISPLAY Section - ......................   69
5-15.  Printed Wiring Board - POWER Board - ........................   70
5-16.  Schematic Diagram - POWER Board - ..........................   71

6-1.  Rear Panel Section ..........................................................   73
6-2.  Side Panel Section ..........................................................   74
6-3. Chassis 

Section 

...............................................................  75

6-4.  Front Block Section ........................................................   76
6-5.  Center Speaker Section ...................................................   77
6-6.  Speaker (L-ch) Section ...................................................   78
6-7.  DISPLAY Board Section ................................................   79
6-8.  Speaker (R-ch) Section ...................................................   80
6-9.  Front Panel Section .........................................................   81

 ..............................   82

Accessories are given in the last of the electrical parts list.