Sony HT-ST7 Schematic

HT-ST7

SA-ST7

SERVICE MANUAL

Ver. 1.0 2013.06

• All of the units included in the HT-ST7 (SA­ST7/SA-WST7/EZW-RT50) are required to
confi rming operation of SA-ST7. Check in
advance that you have all of the units.

COMPONENT MODEL NAME

HT-ST7

Sound Bar (Active Speaker System) SA-ST7

Subwoofer (Active Subwoofer) SA-WST7

Wireless transceiver EZW-RT50

• Please refer to service manual separately issued for Subwoofer.

As for EZW-RT50, the part number has been described to this

service manual.

US Model

Canadian Model

AEP Model

UK Model

Australian Model

Amplier section

U.S. models:
POWER OUTPUT AND TOTAL HARMONIC DISTORTION:
(FTC)
Front L + Front R:

With 4 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: 50 Watts (per channel at 4 ohms,
1kHz)
Center speaker block: 50 Watts (per channel at 4 ohms, 1 kHz)

Canadian models:
POWER OUTPUT (rated)

Front L + Front R: 35 W + 35 W
(at 4 ohms, 1 kHz, 1 % THD)

POWER OUTPUT (reference)

Front L/Front R speaker blocks: 50 Watts (per channel at 4 ohms,
1kHz)
Center speaker block: 50 Watts (per channel at 4 ohms, 1 kHz)

AEP, UK and Australian models:
POWER OUTPUT (rated)

Front L + Front R: 40 W + 40 W
(at 4 ohms, 1 kHz, 1 % THD)

POWER OUTPUT (reference)

Front L/Front R speaker blocks: 50 Watts (per channel at 4 ohms,
1kHz)
Center speaker block: 50 Watts (per channel at 4 ohms, 1 kHz)

Inputs

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

COAXIAL IN
* These 3 jacks are identical. Using any of them makes no dierence.
Output

HDMI TV OUT (ARC)

SPECIFICATIONS

BLUETOOTH section

Communication system

BLUETOOTH Specication version 3.0

Output

BLUETOOTH Specication Power Class 2

Maximum communication range

Line of sight approx. 10 m (33 ft)

Maximum number of devices to be registered

9 devices

Frequency band

2.4 GHz band (2.4000 GHz - 2.4835 GHz)

Modulation method

FHSS (Freq Hopping Spread Spectrum)

Compatible BLUETOOTH proles

A2DP (Advanced Audio Distribution Prole)
AVRCP 1.3 (Audio Video Remote Control Prole)

Supported Codecs

Transmission range (A2DP)

1) The actual range will vary depending on factors such as obstacles

2) BLUETOOTH standard proles indicate the purpose of BLUETOOTH

3) Codec: Audio signal compression and conversion format

4) Subband Codec

5) Advanced Audio Coding

Front L/Front R speaker blocks

Speaker system

Speaker

Rated impedance

3)

4)

SBC

, AAC5), aptX

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

between devices, magnetic elds around a microwave oven, static
electricity, cordless phone, reception sensitivity, operating system,
software application, etc.

communication between devices.

2-way speaker system, Acoustic suspension

Woofer: 65 mm (2 5/8 in) cone type, Magnetic uid speaker
Tweeter; 20 mm (13/16 in) dome type

4 ohms

1)

2)

Center speaker block

Speaker system

Full range speaker system, Acoustic suspension

Speaker (5 speakers)

65 mm (2 5/8 in) cone type, Magnetic uid speaker

Rated impedance

4 ohms

General

Power requirements

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

220 V - 240 V AC, 50 Hz/60 Hz

(AEP, UK and Australian models)

Power consumption

On: 50 W (US and Canadian models)
On: 55 W (AEP, UK and Australian models)
“Control for HDMI” is o (Standby mode): 0.5 W or less
BLUETOOTH Standby mode: 0.5 W or less

Dimensions (approx.) (w/h/d)

1,080 mm × 109 mm × 110 mm (42 5/8 in × 4 3/8 in × 4 3/8 in)
(without grille frame, without stands)
1,080 mm × 109 mm × 129 mm (42 5/8 in × 4 3/8 in × 5 1/8 in)
(with grille frame, without stands)
1,080 mm × 129 mm × 138 mm (42 5/8 in × 5 1/8 in × 5 1/2 in)
(with grille frame, with stands)
1,080 mm × 129 mm × 130 mm (42 5/8 in × 5 1/8 in × 5 1/8 in)
(without grille fr am e, with stands)

Mass (approx.)

7.9 kg (17 Ib 6 5/8 oz) (with grille frame, with stands)

HOME THEATRE SYSTEM

Wireless transceiver (EZW-RT50)

Communication System

Wireless Sound Specication version 1.0

Frequency band

5.736 GHz - 5.814 GHz (US and Canadian models)

5.725 GHz - 5.875 GHz (AEP, UK and Australian models)

Power requirements

DC 3.3 V, 300 mA

Modulation method

DSSS

Dimensions (approx.)

30 mm × 9 mm × 60 mm (1 3/16 in × 3/8 in × 2 3/8 in) (w/h/d)

Mass (approx.)

10 g (3/8 oz)

Digital audio input formats supported by the system

Dolby Digital DTS-HD Master Audio*
Dolby Digital Plus* DTS-HD High Resolution Audio*
Dolby TrueHD* DTS-HD Low Bit Rate*
DTS Linear PCM 2ch 48 kHz or less
DTS 96/24 Linear PCM Maximum 7.1ch 192 kHz or less*

* It is possible to input these formats only with HDMI connection.

– Continued on next page –

HT-ST7

SA-ST7

9-893-769-01

2013F33-1

2013.06

©

ACTIVE SPEAKER SYSTEM

Sony Corporation

Published by Sony Techno Create Corporation

HT-ST7

T

T

Video formats supported by the system

Input/Output (HDMI Repeater block)

File 2D

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

Accesseries

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)

Design and specications 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 eciency of
amplier block is achieved with the
full digital amplier, S-Master.

packing

Frame

3D

Side-by-

Side (Half)

Over-Under

(Top-and-

Bottom)

Copyrights

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 of DTS, Inc.
Product includes software. © DTS, Inc.
All Rights Reserved.

NOTES ON CHIP COMPONENT REPLACEMENT

• Never reuse a disconnected chip component.

• Notice that the minus side of a tantalum capacitor may be dam­aged by heat.

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 2 V AC range are suitable. (See
Fig. A)

To Exposed Metal
Parts on Set

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.

his system incorporates High-Denition Multimedia Interface (HDMI™)
technology.
The terms HDMI and HDMI High-Denition 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.

he 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 arethose of their respective owners.

AC

1.5 kΩ0.15 μF

voltmeter
(0.75 V)

Earth Ground

Fig. A. Using an AC voltmeter to check AC leakage.

SAFETY-RELATED COMPONENT WARNING!

COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE
WITH MARK 0 ON THE SCHEMATIC DIAGRAMS AND IN
THE PARTS LIST ARE CRITICAL TO SAFE OPERATION.
REPLACE THESE COMPONENTS WITH SONY PARTS
WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS
MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY.

ATTENTION AU COMPOSANT AYANT RAPPORT

LES COMPOSANTS IDENTIFIÉS PAR UNE MARQUE 0 SUR
LES DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES
PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ DE FONC­TIONNEMENT. NE REMPLACER CES COMPOSANTS QUE
PAR DES PIÈCES SONY DONT LES NUMÉROS SONT DON­NÉS DANS CE MANUEL OU DANS LES SUPPLÉMENTS
PUBLIÉS PAR SONY.

À LA SÉCURITÉ!

2

TABLE OF CONTENTS

HT-ST7

1. SERVICING NOTES ............................................. 4

2. DISASSEMBLY

2-1. Disassembly Flow ........................................................... 6

2-2. Panel (L/R) Assy ............................................................. 7

2-3. Panel (Rear L) Block, Panel (Rear R) ............................. 7

2-4. Bracket (Arm A/B) Assy, Fuse (F502) ............................ 8

2-5. Bracket (Air) Assy .......................................................... 8

2-6. Bracket (Bottom) Block .................................................. 9

2-7. Power Cord (AC1) .......................................................... 10

2-8. Chassis Block .................................................................. 11

2-9. POWER Board ................................................................ 12

2-10. AMP Board ..................................................................... 12

2-11. IO Board ......................................................................... 13

2-12. MAIN Board ................................................................... 13

2-13. Center Speaker Block ..................................................... 14

2-14. Loudspeaker (6.5 cm) (SP5, SP6, SP7, SP8, SP9) ......... 15

2-15. Cable with Connector (SPC3) ......................................... 16

2-16. Cable with Connector (SPC4) ......................................... 16

2-17. RC-S801/A (NFC1) ........................................................ 17

2-18. Bluetooth Module (BT1) ................................................ 18

2-19. Front Speaker (L) Block ................................................. 19

2-20. Loudspeaker (6.5 cm) (SP3) (L-ch) ................................ 19

2-21. Loudspeaker (2 cm) (SP1) (L-ch) ................................... 20

2-22. Cable with Connector (SPC1) (L-ch) ............................. 21

2-23. Front Speaker (R) Block ................................................. 22

2-24. DISPLAY Board ............................................................. 23

2-25. Loudspeaker (6.5 cm) (SP4) (R-ch) ................................ 23

2-26. Loudspeaker (2 cm) (SP2) (R-ch) ................................... 24

2-27. Cable with Connector (SPC2) (R-ch) ............................. 25

2-28. KEY Board ...................................................................... 26

2-29. Flexible Flat Cable (14P) (FFC1) ................................... 26

3. TEST MODE ............................................................ 27

4. DIAGRAMS

4-1. Block Diagram - HDMI Section - ................................... 30

4-2. Block Diagram - MAIN Section - ................................... 31

4-3. Block Diagram - AMP Section - ..................................... 32

4-4. Block Diagram

- PANEL/POWER SUPPLY Section - ............................ 33

4-5. Schematic Diagram - MAIN Board (1/7) - ..................... 35

4-6. Schematic Diagram - MAIN Board (2/7) - ..................... 36

4-7. Schematic Diagram - MAIN Board (3/7) - ..................... 37

4-8. Schematic Diagram - MAIN Board (4/7) - ..................... 38

4-9. Schematic Diagram - MAIN Board (5/7) - ..................... 39

4-10. Schematic Diagram - MAIN Board (6/7) - ..................... 40

4-11. Schematic Diagram - MAIN Board (7/7) - ..................... 41

4-12. Printed Wiring Board - MAIN Board - ........................... 42

4-13. Printed Wiring Board - AMP Board - ............................. 43

4-14. Schematic Diagram - AMP Board (1/2) - ....................... 44

4-15. Schematic Diagram - AMP Board (2/2) - ....................... 45

4-16. Printed Wiring Board - IO Board - ................................. 46

4-17. Schematic Diagram - IO Board - .................................... 47

4-18. Printed Wiring Boards - PANEL Section - ..................... 48

4-19. Schematic Diagram - PANEL Section - .......................... 49

4-20. Printed Wiring Board - POWER Board - ........................ 50

4-21. Schematic Diagram - POWER Board - .......................... 51

5. EXPLODED VIEWS

5-1. Panel Section ................................................................... 66

5-2. Bracket (Bottom) Section ............................................... 67

5-3. Power Cord Section ........................................................ 68

5-4. Chassis Section ............................................................... 69

5-5. Front Block Section ........................................................ 70

5-6. Front Speaker (L) Section ............................................... 71

5-7. Center Speaker Section ................................................... 72

5-8. DISPLAY Board Section ................................................ 73

5-9. Front Speaker (R) Section ............................................... 74

5-10. Front Panel Section ......................................................... 75

6. ELECTRICAL PARTS LIST .............................. 76

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

3

HT-ST7

SECTION 1

SERVICING NOTES

UNLEADED SOLDER

Boards requiring use of unleaded solder are printed with the lead­free mark (LF) indicating the solder contains no lead.
(Caution: Some printed circuit boards may not come printed with

the lead free mark due to their particular size)

: LEAD FREE MARK

Unleaded solder has the following characteristics.

• Unleaded solder melts at a temperature about 40 °C higher
than ordinary solder.

Ordinary soldering irons can be used but the iron tip has to be

applied to the solder joint for a slightly longer time.

Soldering irons using a temperature regulator should be set to

about 350 °C.
Caution: The printed pattern (copper foil) may peel away if

the heated tip is applied for too long, so be careful!

• Strong viscosity

Unleaded solder is more viscous (sticky, less prone to fl ow)

than ordinary solder so use caution not to let solder bridges
occur such as on IC pins, etc.

• Usable with ordinary solder

It is best to use only unleaded solder but unleaded solder may

also be added to ordinary solder.

ADVANCE PREPARATION WHEN CONFIRMING OP­ERATION

All of the units included in the HT-ST7 (SA-ST7/SA-WST7/EZW­RT50) are required to confi rming operation of SA-ST7. Check in
advance that you have all of the units.

CAPACITOR ELECTRICAL DISCHARGE PROCESSING

When checking the board, for the electric shock prevention, con­nect the resistors to both ends of respective capacitor (C519) to
discharge the capacitor (C519).

– POWER Board (Conductor Side) –

800 :/2 W

C519

ABOUT THE PAIRING METHOD

When the following repair is performed, the pairing of the Bar
speaker (SA-ST7) and Subwoofer (SA-WST7) is cut.

• Replacing of complete MAIN board

• Replacing of IC1002 on the MAIN board

Return the Bar speaker (SA-ST7) and Subwoofer (SA-WST7) to
the customer after performing the pairing according to the follow­ing procedure.

Preparation:

Insert the wireless transceivers (EZW-RT50) into the Bar speaker
(SA-ST7) and Subwoofer (SA-WST7).

NOTE OF PERFORMING THE OPERATION CHECK IN
THE STATE THAT HEAT SINK WAS REMOVED

When performing the operation check in the state that this unit was
disassembled, it is possible to perform the operation check in the
state that heat sink was removed. But don’t perform the operation
check in the long time, and perform the operation check in the
volume state as low as possible.

NOTE OF REPLACING THE IC3506 ON THE MAIN
BOARD

IC3506 on the MAIN board cannot exchange with single. When
this part is damaged, exchange the complete mounted board.

NOTE OF REPLACING THE IC3001, IC3003, IC3005
AND IC3007 ON THE AMP BOARD AND THE COM­PLETE AMP BOARD

When IC3001, IC3003, IC3005 and IC3007 on the AMP board and
the complete AMP board are replaced, it is necessary to spread the
compound between the AMP board and the heat sink.
Spread the compound referring to the fi gure below.

– AMP Board (Component Side) –

thermal compound

Procedure:

1 Connect the AC power cords (mains leads).
2 Press the button on the Bar Speaker.
3 Confirm the indicator of the subwoofer is lit

in green. If not, the wireless transmission is not
activated.











IC3001

IC3003 IC3005 IC3007

No sound is output from the subwoofer.

Make sure the AC power cord (mains lead) of the subwoofer is connected.
Make sure the wireless transceivers are inserted correctly.

indicator is off:

If the
– Check that the AC power cord (mains lead) of the subwoofer is connected

securely.

– Turn the subwoofer on by pressing the

indicator flashes in green quickly:

If the
First press the
into the subwoofer correctly, and press the

Press the
blocking the ventilation holes of the subwoofer.

button on the subwoofer, then insert the wieless transceiver

indicator flashes in red: If the

button to turn off the subwoofer, and check that nothing is

button on the subwoofer.

button on the subwoofer again.

4

MODEL IDENTIFICATION

Distinguish by model number label stuck on the rear side of a main unit.

Note: The printed contents of following fi gure model number label may be different from the model number label of a main unit.

MODEL NUMBER LABEL

US and Canadian models UK model

SA-ST7 UC2 4-461-308-0s

HT-ST7

AEP model

4-461-309-0s

Australian model

4-461-309-1s

SA-ST7 AU1

4-466-482-0s

– Rear view –

5

HT-ST7

SECTION 2

DISASSEMBLY

• This set can be disassembled in the order shown below.

2-1. DISASSEMBLY FLOW

When disassembling the unit, start working after removing the grill frame always first.

Note:

SET

2-2. PANEL (L/R) ASSY
(Page 7)

2-7. POWER CORD (AC1)
(Page 10)

2-8. CHASSIS BLOCK
(Page 11)

2-9. POWER BOARD
(Page 12)

2-10. AMP BOARD
(Page 12)

2-11. IO BOARD
(Page 13)

2-12. MAIN BOARD
(Page 13)

2-3. PANEL (REAR L) BLOCK, PANEL (REAR R)
(Page 7)

2-6. BRACKET (BOTTOM) BLOCK
(Page 9)

2-13. CENTER SPEAKER BLOCK
(Page 14)

2-14. LOUDSPEAKER (6.5 cm)
(SP5, SP6, SP7, SP8, SP9)
(Page 15)

2-15. CABLE WITH CONNECTOR
(SPC3)
(Page 16)

2-4. BRACKET (ARM A/B) ASSY, FUSE (F502)
(Page 8)

2-5. BRACKET (AIR) ASSY
(Page 8)

2-16. CABLE WITH CONNECTOR
(SPC4)
(Page 16)

2-17. RC-S801/A (NFC1)
(Page 17)

2-18. BLUETOOTH MODULE (BT1)
(Page 18)

2-19. FRONT SPEAKER (L) BLOCK
(Page 19)

2-20. LOUDSPEAKER (6.5 cm)
(SP3) (L-ch)
(Page 19)

2-21. LOUDSPEAKER (2 cm)
(SP1) (L-ch)
(Page 20)

2-22. CABLE WITH CONNECTOR
(SPC1) (L-ch)
(Page 21)

2-28. KEY BOARD
(Page 26)

2-23. FRONT SPEAKER (R) BLOCK
(Page 22)

2-24. DISPLAY BOARD
(Page 23)

2-25. LOUDSPEAKER (6.5 cm)
(SP4) (R-ch)
(Page 23)

2-26. LOUDSPEAKER (2 cm)
(SP2) (R-ch)
(Page 24)

2-27. CABLE WITH CONNECTOR
(SPC2) (R-ch)
(Page 25)

2-29. FLEXIBLE FLAT CABLE
(14P) (FFC1)
(Page 26)

6

Note: Follow the disassembly procedure in the numerical order given.

2-2. PANEL (L/R) ASSY

When installing the panel (L/R) assy,

Note 2:

check the presence or absence of a mark,
do not mistake the right and left.

3 panel (L) assy

HT-ST7

1 two screws
(BVTP3 u 10)

Mark on the panel (R) assy

1 two screws
(BVTP3 u 10)

3 panel (R) assy

2 two claws

– Rear bottom view –

2-3. PANEL (REAR L) BLOCK, PANEL (REAR R)

5 seven screws
(step) (BVTP3)

7 two screws
(step) (BVTP3)

Please spread a sheet under

Note 1:

a unit not to injure front side.

2 two claws

8 panel (rear R)

2 claw

3 foot (corner)

Note 2:

check that J251 installed the
position shown in the figure.

1 two bosses

When installing the panel,

J251

– Rear view –

Please spread a sheet under

Note 1:

a unit not to injure front side.

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power cord

– Rear view –

2 claw

3 foot (corner)

5 seven screws

(step) (BVTP3)

6 panel (rear L) block

4 Remove the power cord

from the hook of panel
(rear L).

1 two bosses

– Rear bottom view –

7

HT-ST7

2-4. BRACKET (ARM A/B) ASSY, FUSE (F502)

1 screw
(BVTP3 u 8)

4 bracket (arm A) assy

2 boss

3 claw

4 bracket (arm B) assy

1 screw

(BVTP3 u 8)

1 screw
(BVTP3 u 8)

2 boss

1 screw

(BVTP3 u 8)

3 claw

1 screw

(BVTP3 u 8)

4 bracket (arm B) assy

1 screw

(BVTP3 u 8)

2 boss

3 claw

1 screw

(BVTP3 u 8)

2 boss

4 bracket (arm A) assy

1 screw

(BVTP3 u 8)

3 claw

5 fuse (F502)

Note:

a unit not to injure front side.

– Rear bottom view –

Please spread a sheet under

2-5. BRACKET (AIR) ASSY

2 bracket (air) assy

1 three screws

(BVTP3 u 8)

1 three screws
(BVTP3 u 8)

2 bracket (air) assy

1 three screws

(BVTP3 u 8)

2 bracket (air) assy

Please spread a sheet under

Note:

a unit not to injure front side.

– Rear bottom view –

8

2-6. BRACKET (BOTTOM) BLOCK

HT-ST7

3 guide pin

2 three screws

(BVTP3 u 8)

4 boss

2 three screws

(BVTP3 u 8)

3 guide pin

1 nine screws

(BV/ring)

5 bracket (bottom) block

Please spread a sheet under

Note:

a unit not to injure front side.

– Rear bottom view –

9

HT-ST7

2-7. POWER CORD (AC1)

3 Draw out the power cord.

1 Remove the power cord

from the clamp (L35).

2 power cord connector
(CN501)

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When installing the power cord (AC1),

Note 2:

check the direction of claw of cord bushing
(FBS001) and install correctly.

claw
cord bushing
(FBS001)

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clamp (L35)

power cord
(AC1)

POWER board

power cord
(AC1)

to POWER board

6 power cord
(AC1)

5 cord bushing (FBS001)

150 +5, -0 mm

10

Please spread a sheet under

Note 1:

a unit not to injure front side.

4 Remove the cord bushing (FBS001)
in the direction of an arrow.

– Rear bottom view –

2-8. CHASSIS BLOCK

HT-ST7

flexible flat cable (8P)

7

(CN1002)

flexible flat cable (15P)

8

(CN1005)

cushion (QJ, S)

6

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flexible flat cable (8P)

flexible flat cable (15P)

flexible flat cable (14P)

9

(CN902)

3 connector
(CN3006)

flexible flat cable (5P)

0

(CN1007)

2 connector
(CN3007)

1 Remove wires from
the clamp (L35).

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4 connector
(CN3002)

5 connector
(CN3003)

AMP board

clamp (L35)

cushion (QJ, S)

When installing the flexible flat cable,

Note 2:

ensure the colored line.
No slanting after insertion.

colored line

connector

MAIN board

flexible flat cable

Please spread a sheet under

Note 1:

a unit not to injure front side.

qs chassis block

– Rear bottom view –

qa six screws
(BVTP3 u 8)

11

HT-ST7

2-9. POWER BOARD

3 four screws
(BVTP3 u 8)

1 connector
(CN3004)

A

A

2 connector
(CN503)

3 three screws
(BVTP3 u 8)

3 screw
(BVTP3 u 8)

4 clamp (L35)

5 POWER board

2-10. AMP BOARD

4 heatsink (AMP)

Note:

the compound referring to “NOTE OF
REPLACING THE IC3001, IC3003,
IC3005 AND IC3007 ON THE AMP

When installing the heat sink, spread

BOARD AND THE COMPLETE
AMP BOARD” on servicing notes
(page 4).

5 screw
(BV3 u 8 CU)

5 two screws
(BV3 u 8 CU)

5 screw
(BV3 u 8 CU)

3 two screws
(transistor)

IC3007

IC3005

IC3003

6 clamp (L35)

– Rear bottom view –

3 two screws
(transistor)

5 two screws
(BV3 u 8 CU)

IC3001

5 two screws
(BV3 u 8 CU)

7 AMP board

4 heatsink (AMP)

Note:

the compound referring to “NOTE OF
REPLACING THE IC3001, IC3003,
IC3005 AND IC3007 ON THE AMP
BOARD AND THE COMPLETE
AMP BOARD” on servicing notes
(page 4).

When installing the heat sink, spread

12

2 flexible flat
cable (28P)
(CN3001)

1 connector
(CN3004)

– Rear bottom view –

2-11. IO BOARD

qa IO REINFORCE board block

9 Remove two bonds.

4 screw

(BVTP3 u 8)

B

tape (BT)

0

HT-ST7

7 two screws
(BVTP3 u 8)

4 screw
(BVTP3 u 8)

qs IO board

6 Remove the IO board block

in the direction of an arrow.

3 connector
(CN1004)

5 four screws
(BVTP3 u 8)

Note 1:

do not remove connector on the MAIN
board side.

2-12. MAIN BOARD

6 screw
(BVTP3 u 8)

6 two screws
(BVTP3 u 8)

B

When removing flexible flat cables,

flexible flat cable (9P) (FFC2)

1

(CN901)

flexible flat cable (13P) (FFC4)

2

C

(CN1001)

6 screw
(BVTP3 u 8)

8 housing (wireless)

flexible flat cable (9P)

1

(CN201)

flexible flat cable (13P)

2

(CN4001)

6 two screws
(BVTP3 u 8)

Note 2:

ensure the colored line.
No slanting after insertion.

colored line

connector

– Rear bottom view –

Note 2:

ensure the colored line.
No slanting after insertion.

colored line

When installing the flexible flat cable,

flexible flat cable

When installing the flexible flat cable,

flexible flat cable

6 screw
(BVTP3 u 8)

7 four screws

(B3 u 6)

C

8 Remove the MAIN board
in the direction of an arrow.

Note 1: When the complete MAIN board is replaced, refer

to “ABOUT THE PAIRING METHOD” on page 4.

9 MAIN board

flexible flat cable (28P)

3

(CN5002)

5 connector (CN601)

4 saranet cushion

– Rear bottom view –

connector

:LUHVHWWLQJ

MAIN board

AMP board

saranet cushion

13

HT-ST7

2-13. CENTER SPEAKER BLOCK

5 screw
(PTPWH3 u 8)

7 center speaker block

guide pin

6 three screws
(BVP-tite 3 u 8)

4 Remove the cable with connector (SPC2)

from three hooks of center speaker block.

3 Remove the cable with connector (SPC3)
from three hooks of center speaker block.

2 Remove the cable with connector (SPC4)
from three hooks of center speaker block.

1 saranet cushion

5 screw

(PTPWH3 u 8)

ditch

When installing the center speaker

Note 1:

block, align the guide pin and ditch.

Please spread a sheet under

Note 1:

a unit not to injure front side.

4 Remove the cable with connector (SPC1)
from three hooks of center speaker block.

:LUHVHWWLQJ

1 Install cables with connector (SPC1, SPC2) to the hook of the center speaker block.

cable with connector (SPC2)

2 Install cables with connector (SPC3) to the hook of the center speaker block.

cable with connector (SPC1)

– Rear bottom view –

center speaker block

cable with connector (SPC3)

3 Install cables with connector (SPC4) to the hook of the center speaker block.

cable with connector (SPC4)

14

4 Paste the saranet cushion.

2-14. LOUDSPEAKER (6.5 cm) (SP5, SP6, SP7, SP8, SP9)

1 two screws
(3.5)

3 terminal (wide side)
[red]

4 loudspeaker (6.5 cm) (SP6)

Note 1:
and SP9 are the same as the SP6.

Procedure of removal of SP5, SP7, SP8

SP5

3 terminal (narrow side)
[black]

SP7

1 two screws
(3.5)

SP9

SP8

:LUHVHWWLQJ

When installing the speaker wire, make the

Note 2:

position of caulking of terminals is outside.

HT-ST7

–)URQWERWWRPYLHZ–

:LUHVHWWLQJ

terminals position
(wide side) [gray]

terminals position
(narrow side) [black]

loudspeaker (6.5 cm)
(SP5)

narrow side
[black]

2 Remove the loudspeaker (6.5 cm) (SP6)
in the direction of an arrow.

When installing the loudspeaker (6.5 cm) (SP5, SP6, SP7, SP8, SP9),

Note 3:

make the position of terminals as shown in the figure below.

terminals position
(wide side) [gray]

terminals position
(narrow side) [black]

loudspeaker (6.5 cm)
(SP7)

terminals position
(wide side) [blue]

terminals position
(narrow side) [black]

loudspeaker (6.5 cm)
(SP9)

terminals position
(wide side) [red]

terminals position
(narrow side) [black]

loudspeaker (6.5 cm)

terminals position
(wide side) [red]

terminals position
(narrow side) [black]

loudspeaker (6.5 cm)
(SP8)

wide side
[SP5: gray]
[SP6: red]
[SP7: gray]
[SP8: red]
[SP9: blue]

loudspeaker (6.5 cm)
(SP6)

15

HT-ST7

2-15. CABLE WITH CONNECTOR (SPC3)

1 cushion
(absorbent)

[black]

2 Remove the cord bushing

of cable with connector in
the direction of an arrow.

[gray]

3 cable with connector
(SPC3)

:LUHVHWWLQJ

No gap.

OK

cord bush

There is a gap.

cabinet (R) assy

cable with connector (SPC3)

2-16. CABLE WITH CONNECTOR (SPC4)

NG

cord bush

cabinet (R) assy

cable with connector (SPC3)

1 cushion
(absorbent)

[black]

–)URQWERWWRPYLHZ–

[red]

2 Remove the cord bushing
of cable with connector in
the direction of an arrow.

2 Remove two cord bushings
of cable with connector in
the direction of an arrow.

3 cable with connector
(SPC4)

:LUHVHWWLQJ

No gap.

OK

cord bush

1 cushion
(absorbent)

1 cushion
(absorbent)

1 cushion
(absorbent)

[black]

[gray]

[black]

[blue]

[black]

[red]

–)URQWERWWRPYLHZ–

2 Remove the cord bushing
of cable with connector in
the direction of an arrow.

NG

cord bush

There is a gap.

16

cabinet (R) assy

cable with connector (SPC3)

cabinet (R) assy

cable with connector (SPC3)

2-17. RC-S801/A (NFC1)

When installing the flexible flat cable,

Note 2:

ensure the colored line.
No slanting after insertion.

colored line

connector

flexible flat cable

HT-ST7

)OH[LEOHIODWFDEOH3VHWWLQJ

flexible flat cable (8P)

saranet cushion

–5HDUWRSYLHZ–

Note 1:

a unit not to injure front side.

5&6$1)&VHWWLQJ

cushion (NFC)

RC-S801/A
(NFC1)

cushion (NFC)

–,QVLGHYLHZ–

Please spread a sheet under

3 Remove the
in the direction of an arrow.

flexible flat cable (8P)

tape (sub material)

guide

RC-S801/A block

4 two cushions (NFC)

RC-S801/A (NFC1)

7

saranet cushion

1 saranet cushion

2

1 saranet cushion

boss

tape (sub material)

5

flexible flat cable (8P) (FFC5)

6

RC-S801/A
(NFC1)

boss

guide

–5LJKWYLHZ–

17

HT-ST7

2-18. BLUETOOTH MODULE (BT1)

– Rear top view –

 Flexible flat cable (14P) setting

flexible flat cable

tape (sub material)

(14P)

– Right view –

Bluetooth module (BT1)

tape (sub material)

boss

3

6

(14P)

flexible flat cable
(14P)

saranet cushion

flexible flat cable

1 saranet cushion

When installing the flexible flat cable,

Note 2:

ensure the colored line.
No slanting after insertion.

colored line

connector

flexible flat cable

Please spread a sheet under

Note 1:

a unit not to injure front side.

4 Remove the B
in the direction of an arrow.

bluetooth module block

tape (sub material)

5

Bluetooth module (BT1)

7

tape

5

(sub material)

2 screw
(BVTP2.6)

18

2-19. FRONT SPEAKER (L) BLOCK

Please spread a sheet under

Note 1:

a unit not to injure front side.

3 front speaker (L) block

1 two screws

(PTPWH3 u 8)

guide pin

ditch

HT-ST7

When installing the front

Note 2:

speaker (L) block, align
the guide pin and ditch.

2 three screws
(BVP-tite 3 u 8)

2-20. LOUDSPEAKER (6.5 cm) (SP3) (L-ch)

When installing the loudspeaker (18 cm) (SP1),

Note 1:

make the position of terminals as shown
in the figure below.

terminals position
(narrow side) [black]

loudspeaker (6.5 cm)
(SP3)

terminals position
(wide side) [blue]

1 two screws
(3.5)

3 terminal (wide side)
[blue]

– Rear bottom view –

1 two screws
(3.5)

4 loudspeaker (6.5 cm)
(SP3)

3 terminal (narrow side)
[black]

:LUHVHWWLQJ

When installing the speaker wire, make the

Note 2:

position of caulking of terminals is outside.

wide side
[blue]

loudspeaker (6.5 cm) (SP3)

2 Remove the loudspeaker
(6.5 cm) (SP3) in the
direction of an arrow.

narrow side
[black]

–)URQWERWWRPYLHZ–

19

HT-ST7

2-21. LOUDSPEAKER (2 cm) (SP1) (L-ch)

When installing the loudspeaker (2 cm) (SP2),

Note 1:

match the terminal position with the marking.

terminal marking

1 two screws
(3.5)

1 two screws
(3.5)

1 three screws
(3.5)

loudspeaker (2 cm) (SP1)

– Baffle (L) block inner view –

3 terminal (wide side)
[red]

 :ire VettinJ

When installing the speaker wire, make the

Note 2:

position of caulking of terminals is outside.

wide side
[red]

loudspeaker (2 cm) (SP1)

narrow side
[black]

4 screw (3.5)

 :ire VettinJ

5 loudspeaker (2 cm)
(SP1)

4 screw (3.5)

3 terminal (narrow side)

[black]

MOUNTED board

2 Remove the baffle (L)
block in the direction
of an arrow.

1 screw (3.5)

– Front bottom view –

20

speaker wire from MOUNTED board

2-22. CABLE WITH CONNECTOR (SPC1) (L-ch)

1 terminal (wide side)

1 terminal (narrow side)

[black]

–)URQWERWWRPYLHZ–

[gray]

:LUHVHWWLQJ

narrow side
[black]

When installing the cable with connector (SPC1), make

Note:

the position of caulking of terminals is outside.

wide side
[gray]

MOUNTED board

HT-ST7

3 cable with connector
(SPC1)

2 Remove the cord bushing
of cable with connector in
the direction of an arrow.

:LUHVHWWLQJ

No gap.

There is a gap.

OK

cord bush

cabinet (R) assy

cable with connector
(SPC2)

NG

cord bush

cabinet (R) assy

cable with connector
(SPC2)

21

HT-ST7

2-23. FRONT SPEAKER (R) BLOCK

1 two canoe clips (small)

When installing the front

Note 2:

speaker (R) block, align
the guide pin and ditch.

guide pin

2 three adhesive sheets

1 two canoe clips (small)

3 sheet (jack)

4 screw (PTPWH3 u 8)

ditch

6 front speaker (R) block

4 screw

(PTPWH3 u 8)

6KHHWMDFNVHWWLQJ

guide line

valley fold

sheet (jack)

guide line

mountain fold

5 three screws
(BVP-tite 3 u 8)

Please spread a sheet under

Note 1:

a unit not to injure front side.

–5HDUERWWRPYLHZ–

22

2-24. DISPLAY BOARD

1 saranet cushion

2 screw (BVTP3 u 12)

3 collar (damper)

8 bushing (damper)

2 screw

(BVTP3 u 12)

3 collar (damper)

8 bushing (damper)

HT-ST7

7 holder (LED) assy

6 two claws

9 DISPLAY board

2 screw

(BVTP3 u 12)

3 collar (damper)

flexible flat cable (15P) (FFC6)

5

(CN801)

When installing the flexible flat cable,

Note:

ensure the colored line.
No slanting after insertion.

colored line

connector

flexible flat cable

8 bushing (damper)

2-25. LOUDSPEAKER (6.5 cm) (SP4) (R-ch)

1 two screws

1 two screws

(3.5)

4 loudspeaker (6.5 cm)
(SP4)

(3.5)

3 collar
(damper)

– Front bottom view –

2 screw
(BVTP3 u 12)

4 Remove the DISPLAY board block
in the direction of an arrow.

When installing the loudspeaker (6.5 cm) (SP4),

Note 1:

make the position of terminals as shown
in the figure below.

terminals position
(narrow side) [black]

8 bushing (damper)

3 terminal (wide side)

[blue]

2 Remove the loudspeaker
(6.5 cm) (SP4) in the
direction of an arrow.

3 terminal (narrow side)
[black]

–)URQWERWWRPYLHZ–

terminals position
(wide side) [blue]

:LUHVHWWLQJ

When installing the speaker wire, make the

Note 2:

position of caulking of terminals is outside.

wide side
[blue]

loudspeaker (6.5 cm) (SP4)

loudspeaker (6.5 cm)
(SP4)

narrow side
[black]

23

HT-ST7

2-26. LOUDSPEAKER (2 cm) (SP2) (R-ch)

1 three screws
(3.5)

1 two screws
(3.5)

1 two screws
(3.5)

When installing the loudspeaker (2 cm) (SP2),

Note 1:

match the terminal position with the marking.

terminalmarking

2 Remove the baffle (R)
block in the direction
of an arrow.

– Front bottom view –

1 screw (3.5)

5 loudspeaker (2 cm)

(SP2)

4 screw (3.5)

3 terminal (wide side)

[red]

 :ire VettinJ

MOUNTED board

4 screw (3.5)

3 terminal (narrow side)

[black]

 :ire VettinJ

Note 2:

position of caulking of terminals is outside.

loudspeaker (2 cm) (SP2)

– Baffle (R) block inner view –

When installing the speaker wire, make the

wide side
[red]

loudspeaker (2 cm) (SP2)

narrow side
[black]

24

speaker wire from MOUNTED board

2-27. CABLE WITH CONNECTOR (SPC2) (R-ch)

HT-ST7

:LUHVHWWLQJ

Note:

the position of caulking of terminals is outside.

:LUHVHWWLQJ

No gap.

narrow side
[black]

When installing the cable with connector (SPC2), make

OK

wide side
[red]

MOUNTED board

cord bush

1 terminal (narrow side)
[black]

1 terminal (wide side)
[red]

–)URQWERWWRPYLHZ–

3 cable with connector
(SPC2)

There is a gap.

cabinet (R) assy

cable with connector
(SPC2)

NG

cord bush

cabinet (R) assy

cable with connector
(SPC2)

2 Remove the cord bushing
of cable with connector in
the direction of an arrow.

25

HT-ST7

2-28. KEY BOARD

flexible flat cable (5P) (FFC7) (CN751)

3

Note 3:

ensure the colored line.
No slanting after insertion.

The flexible flat cable (5P) (FFC7) must be inserted

Note 2:
before installing the KEY board to the front panel.

4 KEY board

1 four screws

(BVTP2.6)

When installing the flexible flat cable,

colored line

2 Remove the KEY board block
in the direction of an arrow.

flexible flat cable

Please spread a sheet under

Note 1:

a unit not to injure front side.

connector

2-29. FLEXIBLE FLAT CABLE (14P) (FFC1)

tape (BT)

2

Please spread a sheet under

Note:

a unit not to injure front side.

sheet (BT)

1

flexible flat cable (14P) (FFC1)

3

 Tape (BT) setting

– Rear bottom view –

tape (BT)

cushion (BT pad)

guide line

 Flexible flat cable (14P) (FFC1) setting

sheet (BT)

screw hole

flexible flat cable (14P) (FFC1)

26

guide line

– Rear bottom view –

SECTION 3

TEST MODE

HT-ST7

1. TEST MODES OTHER THAN THE TEST MODE MENU

These are executable test mode even if not entering the test mode
menu.

1-1. Cold Reset

It can initialize various backup information.

Procedure:

1. Press the [

2. Press the three buttons of the [INPUT], [VOLUME –] and
[

] simultaneously.

?/1

3. The message “RESET” is displayed on the fl uorescent indica-
tor tube, then turn the power off.

2. TEST MODES IN THE TEST MODE MENU

These are the test modes done in the test mode menu.

Setting method of the test mode menu:

1. Press the [

2. Press the two buttons of the [INPUT] and [VOLUME +] si­multaneously for fi ve seconds.

3. The message “PANEL” blinks on the fl uorescent indicator
tube and enter the test mode menu.

] button to turn the power on.

?/1

] button to turn the power on.

?/1

2-1. Panel Test Mode

It can confi rm the lighting of fl uorescent indicator tube and LEDs,
operation of buttons, display of model name, destination and soft­ware version.

Procedure:

1. Enter the test mode menu.
(Refer to “Setting method of the test mode menu”)

2. In the state of blinking the “PANEL” on the fl uorescent indica-
tor tube, press the [INPUT] button.

3. All segments in the fl uorescent indicator tube and all LEDs are
lighted up.

4. When pressing the [VOLUME +] button, the display on the
fl uorescent indicator tube repeatedly changes in order from all
lighting → pattern 1 (power indicator LED (white color) is
lighted up) → pattern 2 (Bluetooth indicator LED (blue color)
and [MUTING] LED are lighted up).

All ligting

Pattern 1

Releasing method of the test mode menu:

Press the [

] button to release the test mode menu.

?/1

Pattern 2

5. In the state of step 4, press the [VOLUME –] button and “K 0”
is displayed on the fl uorescent indicator tube.

Each time a button is pressed, “K 0” value increases. However,

once a button is pressed, it is no longer taken into account.

When pressing the all buttons, “OK” and “K 5” are alternately

displayed on the fl uorescent indicator tube.

27