Sony HT-ST7 User manual

SERVICE MANUAL
Sony Corporation
Published by Sony Techno Create Corporation
HT-ST7
SA-ST7
SPECIFICATIONS
HT-ST7
HOME THEATRE SYSTEM
SA-ST7
ACTIVE SPEAKER SYSTEM
9-893-769-01
2013F33-1
© 2013.06
US Model
Canadian Model
AEP Model
UK Model
Australian Model
Ver. 1.0 2013.06
• All of the units included in the HT-ST7 (SA-
ST7/SA-WST7/EZW-RT50) are required to
confirming 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.
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)
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)1)
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les2)
A2DP (Advanced Audio Distribution Prole)
AVRCP 1.3 (Audio Video Remote Control Prole)
Supported Codecs3)
SBC4) , AAC5), aptX
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 elds around a microwave oven, static
electricity, cordless phone, reception sensitivity, operating system,
software application, etc.
2) BLUETOOTH standard proles 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 speaker system, Acoustic suspension
Speaker
Woofer: 65 mm (2 5/8 in) cone type, Magnetic uid speaker
Tweeter; 20 mm (13/16 in) dome type
Rated impedance
4 ohms
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)
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
* It is possible to input these formats only with HDMI connection.
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*
– Continued on next page –

HT-ST7
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)
1.5 kΩ0.15 μF
AC
voltmeter
(0.75 V)
To Exposed Metal
Parts on Set
Earth Ground
Fig. A. Using an AC voltmeter to check AC leakage.
SAFETY-RELATED COMPONENT WARNING!
COMPONENTS IDENTIFIED BY MARK 0OR DOTTED LINE
WITH MARK 0ON 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
À LA SÉCURITÉ!
LES COMPOSANTS IDENTIFIÉS PAR UNE MARQUE 0SUR
LES DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES
PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ DE FONC-
TIONNEMENT. NE REMPLACER CES COMPOSANTS QUE
PAR DES PIÈCES SONY DONT LES NUMÉROS SONT DON-
NÉS DANS CE MANUEL OU DANS LES SUPPLÉMENTS
PUBLIÉS PAR SONY.
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.
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.
T
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.
T
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.
Copyrights
Accesseries
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.
Video formats supported by the system
Input/Output (HDMI Repeater block)
File 2D
3D
Frame
packing
Side-by-
Side (Half)
Over-Under
(Top-and-
Bottom)
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)

HT-ST7
3
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
TABLE OF CONTENTS
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.

HT-ST7
4
SECTION 1
SERVICING NOTES
UNLEADED SOLDER
Boards requiring use of unleaded solder are printed with the lead-
free 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 flow)
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 OP-
ERATION
All of the units included in the HT-ST7 (SA-ST7/SA-WST7/EZW-
RT50) are required to confirming operation of SA-ST7. Check in
advance that you have all of the units.
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 COM-
PLETE 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 figure below.
– AMP Board (Component Side) –
thermal compound
IC3001 IC3003 IC3005 IC3007
CAPACITOR ELECTRICAL DISCHARGE PROCESSING
When checking the board, for the electric shock prevention, con-
nect the resistors to both ends of respective capacitor (C519) to
discharge the capacitor (C519).
C519
– POWER Board (Conductor Side) –
800 :/2 W
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 follow-
ing procedure.
Preparation:
Insert the wireless transceivers (EZW-RT50) into the Bar speaker
(SA-ST7) and Subwoofer (SA-WST7).
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.





No sound is output from the subwoofer.
indicator is off:
–Check that the AC power cord (mains lead) of the subwoofer is connected
securely.
–Turn the subwoofer on by pressing the button on the subwoofer.
indicator flashes in green quickly:
First press the button on the subwoofer, then insert the wieless transceiver
into the subwoofer correctly, and press the button on the subwoofer again.
indicator flashes in red:If the
If the
If the
Make sure the AC power cord (mains lead) of the subwoofer is connected.
Make sure the wireless transceivers are inserted correctly.
Press the button to turn off the subwoofer, and check that nothing is
blocking the ventilation holes of the subwoofer.

HT-ST7
5
MODEL IDENTIFICATION
Distinguish by model number label stuck on the rear side of a main unit.
Note: The printed contents of following figure model number label may be different from the model number label of a main unit.
– Rear view –
SA-ST7 UC2 4-461-308-0s
SA-ST7 AU1
US and Canadian models UK model
Australian model
MODEL NUMBER LABEL
4-466-482-0s
4-461-309-1s
AEP model
4-461-309-0s

HT-ST7
6
SECTION 2
DISASSEMBLY
• This set can be disassembled in the order shown below.
2-1. DISASSEMBLY FLOW
SET
2-3. PANEL (REAR L) BLOCK, PANEL (REAR R)
(Page 7)
2-6. BRACKET (BOTTOM) BLOCK
(Page 9)
2-4. BRACKET (ARM A/B) ASSY, FUSE (F502)
(Page 8)
2-5. BRACKET (AIR) ASSY
(Page 8)
2-7. POWER CORD (AC1)
(Page 10)
2-8. CHASSIS BLOCK
(Page 11)
2-20. LOUDSPEAKER (6.5 cm)
(SP3) (L-ch)
(Page 19)
2-18. BLUETOOTH MODULE (BT1)
(Page 18)
2-17. RC-S801/A (NFC1)
(Page 17)
2-19. FRONT SPEAKER (L) BLOCK
(Page 19)
2-23. FRONT SPEAKER (R) BLOCK
(Page 22)
2-21. LOUDSPEAKER (2 cm)
(SP1) (L-ch)
(Page 20)
2-22. CABLE WITH CONNECTOR
(SPC1) (L-ch)
(Page 21)
2-15. CABLE WITH CONNECTOR
(SPC3)
(Page 16)
2-16. CABLE WITH CONNECTOR
(SPC4)
(Page 16)
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)
2-28. KEY BOARD
(Page 26)
2-9. POWER BOARD
(Page 12)
2-10. AMP BOARD
(Page 12)
2-11. IO BOARD
(Page 13)
2-12. MAIN BOARD
(Page 13)
2-14. LOUDSPEAKER (6.5 cm)
(SP5, SP6, SP7, SP8, SP9)
(Page 15)
2-13. CENTER SPEAKER BLOCK
(Page 14)
2-24. DISPLAY BOARD
(Page 23)
2-2. PANEL (L/R) ASSY
(Page 7)
Note: When disassembling the unit, start working after removing the grill frame always first.

HT-ST7
7
Note: Follow the disassembly procedure in the numerical order given.
2-2. PANEL (L/R) ASSY
2-3. PANEL (REAR L) BLOCK, PANEL (REAR R)
1two screws
(BVTP3 u10)
1two screws
(BVTP3 u10)
Mark on the panel (R) assy
3panel (L) assy
2two claws
2two claws – Rear bottom view –
Note 1: Please spread a sheet under
a unit not to injure front side.
Note 2: When installing the panel (L/R) assy,
check the presence or absence of a mark,
do not mistake the right and left.
3panel (R) assy
1two bosses
2claw
5seven screws
(step) (BVTP3)
5seven screws
(step) (BVTP3)
7two screws
(step) (BVTP3)
3foot (corner)
4Remove the power cord
from the hook of panel
(rear L).
6panel (rear L) block
8panel (rear R)
3foot (corner)
– Rear bottom view –
Note 1: Please spread a sheet under
a unit not to injure front side.
1two bosses
2claw
Note 2: When installing the panel,
check that J251 installed the
position shown in the figure.
J251
– Rear view –
power cord
– Rear view –
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HT-ST7
8
2-4. BRACKET (ARM A/B) ASSY, FUSE (F502)
2-5. BRACKET (AIR) ASSY
4bracket (arm A) assy
4bracket (arm A) assy
4bracket (arm B) assy
4bracket (arm B) assy
1screw
(BVTP3 u8)
1screw
(BVTP3 u8)
2boss
3claw
1screw
(BVTP3 u8)
1screw
(BVTP3 u8)
1screw
(BVTP3 u8)
1screw
(BVTP3 u8)
1screw
(BVTP3 u8)
1screw
(BVTP3 u8)
Note: Please spread a sheet under
a unit not to injure front side.
– Rear bottom view –
2boss
2boss
2boss
3claw
3claw
3claw
5fuse (F502)
2bracket (air) assy
2bracket (air) assy
2bracket (air) assy
1three screws
(BVTP3 u8)
1three screws
(BVTP3 u8)
1three screws
(BVTP3 u8)
Note: Please spread a sheet under
a unit not to injure front side.
– Rear bottom view –

HT-ST7
9
2-6. BRACKET (BOTTOM) BLOCK
5bracket (bottom) block
2three screws
(BVTP3 u8)
3guide pin
3guide pin
4boss
2three screws
(BVTP3 u8)
1nine screws
(BV/ring)
Note: Please spread a sheet under
a unit not to injure front side.
– Rear bottom view –

HT-ST7
10
2-7. POWER CORD (AC1)
4Remove the cord bushing (FBS001)
in the direction of an arrow.
5cord bushing (FBS001)
Note 1: Please spread a sheet under
a unit not to injure front side.
– Rear bottom view –
1Remove the power cord
from the clamp (L35).
2power cord connector
(CN501)
6power cord
(AC1)
3Draw out the power cord.
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clamp (L35)
power cord
(AC1)
POWER board
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power cord
(AC1)
cord bushing
(FBS001)
claw
150 +5, -0 mm
to POWER board
Note 2: When installing the power cord (AC1),
check the direction of claw of cord bushing
(FBS001) and install correctly.

HT-ST7
11
2-8. CHASSIS BLOCK
– Rear bottom view –
Note 1: Please spread a sheet under
a unit not to injure front side.
Note 2: When installing the flexible flat cable,
ensure the colored line.
No slanting after insertion.
cushion (QJ, S) MAIN board
flexible flat cable
colored line
connector
9flexible flat cable (14P)
(CN902) 0flexible flat cable (5P)
(CN1007)
7flexible flat cable (8P)
(CN1002)
8flexible flat cable (15P)
(CN1005)
flexible flat cable (15P)
flexible flat cable (8P)
6cushion (QJ, S)
3connector
(CN3006)
2connector
(CN3007)
4connector
(CN3002)
5connector
(CN3003)
1Remove wires from
the clamp (L35).
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qa six screws
(BVTP3 u8)
qs chassis block
clamp (L35)
AMP board
:ire VettiQJ

HT-ST7
12
2-9. POWER BOARD
2-10. AMP BOARD
1connector
(CN3004)
2connector
(CN503)
3three screws
(BVTP3 u8)
3screw
(BVTP3 u8)
3four screws
(BVTP3 u8)
– Rear bottom view –
A
A
4clamp (L35)
5POWER board
1connector
(CN3004)
2flexible flat
cable (28P)
(CN3001)
3two screws
(transistor)
3two screws
(transistor)
5screw
(BV3 u8 CU)
5screw
(BV3 u8 CU)
5two screws
(BV3 u8 CU)
5two screws
(BV3 u8 CU)
5two screws
(BV3 u8 CU)
– Rear bottom view –
6clamp (L35)
7AMP board
IC3001
IC3007
IC3003
IC3005
4heatsink (AMP)
Note: When installing the heat sink, spread
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).
4heatsink (AMP)
Note: When installing the heat sink, spread
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).

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13
2-11. IO BOARD
6Remove the IO board block
in the direction of an arrow.
1flexible flat cable (9P)
(CN201)
2flexible flat cable (13P)
(CN4001)
3connector
(CN1004)
5four screws
(BVTP3 u8)
7two screws
(BVTP3 u8)
4screw
(BVTP3 u8)
qs IO board
4screw
(BVTP3 u8)
8housing (wireless)
qa IO REINFORCE board block
B
B
0tape (BT)
9Remove two bonds.
Note 2: When installing the flexible flat cable,
ensure the colored line.
No slanting after insertion.
Note 1: When removing flexible flat cables,
do not remove connector on the MAIN
board side.
flexible flat cable
colored line
connector
– Rear bottom view –
2-12. MAIN BOARD
– Rear bottom view –
3flexible flat cable (28P)
(CN5002)
2flexible flat cable (13P) (FFC4)
(CN1001)
1flexible flat cable (9P) (FFC2)
(CN901)
5connector (CN601)
6two screws
(BVTP3 u8)
6two screws
(BVTP3 u8)
7four screws
(B3 u6)
9MAIN board
6screw
(BVTP3 u8)
MAIN board
AMP board
6screw
(BVTP3 u8)
6screw
(BVTP3 u8)
C
C
8Remove the MAIN board
in the direction of an arrow.
4saranet cushion
saranet cushion
:LUHVHWWLQJ
Note 2: When installing the flexible flat cable,
ensure the colored line.
No slanting after insertion.
flexible flat cable
colored line
connector
Note 1: When the complete MAIN board is replaced, refer
to “ABOUT THE PAIRING METHOD” on page 4.

HT-ST7
14
2-13. CENTER SPEAKER BLOCK
– Rear bottom view –
Note 1: Please spread a sheet under
a unit not to injure front side.
Note 1: When installing the center speaker
block, align the guide pin and ditch.
5screw
(PTPWH3 u8)
1saranet cushion
5screw
(PTPWH3 u8)
1Install cables with connector (SPC1, SPC2) to the hook of the center speaker block.
2Install cables with connector (SPC3) to the hook of the center speaker block.
3Install cables with connector (SPC4) to the hook of the center speaker block.
:LUHVHWWLQJ
4Remove the cable with connector (SPC1)
from three hooks of center speaker block.
2Remove the cable with connector (SPC4)
from three hooks of center speaker block.
3Remove the cable with connector (SPC3)
from three hooks of center speaker block.
7center speaker block
center speaker block
4Remove the cable with connector (SPC2)
from three hooks of center speaker block.
cable with connector (SPC1)
cable with connector (SPC3)
cable with connector (SPC4)
cable with connector (SPC2)
6three screws
(BVP-tite 3 u8)
guide pin
ditch
4Paste the saranet cushion.

HT-ST7
15
2-14. LOUDSPEAKER (6.5 cm) (SP5, SP6, SP7, SP8, SP9)
2Remove the loudspeaker (6.5 cm) (SP6)
in the direction of an arrow.
1two screws
(3.5)
1two screws
(3.5)
:LUHVHWWLQJ
:LUHVHWWLQJ
terminals position
(wide side) [gray]
terminals position
(wide side) [gray]
terminals position
(wide side) [blue]
terminals position
(wide side) [red]
terminals position
(wide side) [red]
terminals position
(narrow side) [black]
terminals position
(narrow side) [black]
terminals position
(narrow side) [black]
terminals position
(narrow side) [black]
terminals position
(narrow side) [black]
Note 3: When installing the loudspeaker (6.5 cm) (SP5, SP6, SP7, SP8, SP9),
make the position of terminals as shown in the figure below.
–)URQWERWWRPYLHZ–
3 terminal (narrow side)
[black]
3 terminal (wide side)
[red]
loudspeaker (6.5 cm)
loudspeaker (6.5 cm)
(SP5)
loudspeaker (6.5 cm)
(SP7)
loudspeaker (6.5 cm)
(SP9)
loudspeaker (6.5 cm)
(SP8)
loudspeaker (6.5 cm)
(SP6)
Note 2: When installing the speaker wire, make the
position of caulking of terminals is outside.
narrow side
[black]
wide side
[SP5: gray]
[SP6: red]
[SP7: gray]
[SP8: red]
[SP9: blue]
4loudspeaker (6.5 cm) (SP6)
Note 1: Procedure of removal of SP5, SP7, SP8
and SP9 are the same as the SP6.
SP5
SP7
SP9
SP8

HT-ST7
16
2-15. CABLE WITH CONNECTOR (SPC3)
1 cushion
(absorbent)
1 cushion
(absorbent)
cable with connector (SPC3)
NG
OK
cabinet (R) assy
cord bush
No gap.
There is a gap.
cable with connector (SPC3)
cabinet (R) assy
cord bush
:LUHVHWWLQJ
3cable with connector
(SPC3)
2Remove the cord bushing
of cable with connector in
the direction of an arrow.
2Remove the cord bushing
of cable with connector in
the direction of an arrow.
[gray]
[red]
[black]
[black]
–)URQWERWWRPYLHZ–
2-16. CABLE WITH CONNECTOR (SPC4)
1 cushion
(absorbent)
1 cushion
(absorbent)
1 cushion
(absorbent)
cable with connector (SPC3)
NG
OK
cabinet (R) assy
cord bush
No gap.
There is a gap.
cable with connector (SPC3)
cabinet (R) assy
cord bush
:LUHVHWWLQJ
3cable with connector
(SPC4)
2Remove the cord bushing
of cable with connector in
the direction of an arrow.
2Remove two cord bushings
of cable with connector in
the direction of an arrow.
[gray]
[red]
[black]
[black]
[blue]
[black]
–)URQWERWWRPYLHZ–

HT-ST7
17
2-17. RC-S801/A (NFC1)
Note 1: Please spread a sheet under
a unit not to injure front side.
Note 2: When installing the flexible flat cable,
ensure the colored line.
No slanting after insertion.
flexible flat cable
colored line
connector
6flexible flat cable (8P) (FFC5)
flexible flat cable (8P)
2boss
5tape (sub material)
)OH[LEOHIODWFDEOH3VHWWLQJ
5&6$1)&VHWWLQJ
3Remove the RC-S801/A block
in the direction of an arrow.
7RC-S801/A (NFC1)
4two cushions (NFC)
1saranet cushion
1saranet cushion
saranet cushion
saranet cushion
–5HDUWRSYLHZ–
–5LJKWYLHZ–
–,QVLGHYLHZ–
flexible flat cable (8P)
tape (sub material)
guide
boss
guide
RC-S801/A
(NFC1)
RC-S801/A
(NFC1)
cushion (NFC)
cushion (NFC)

HT-ST7
18
2-18. BLUETOOTH MODULE (BT1)
2screw
(BVTP2.6)
– Rear top view –
Note 1: Please spread a sheet under
a unit not to injure front side.
Note 2: When installing the flexible flat cable,
ensure the colored line.
No slanting after insertion.
– Right view –
flexible flat cable
colored line
connector
6flexible flat cable
(14P)
flexible flat cable
(14P)
flexible flat cable
(14P)
5tape
(sub material)
5tape (sub material)
tape (sub material)
tape (sub material)
7Bluetooth module (BT1)
Bluetooth module (BT1)
Flexible flat cable (14P) setting
1saranet cushion
saranet cushion
4Remove the Bbluetooth module block
in the direction of an arrow.
3boss

HT-ST7
19
2-19. FRONT SPEAKER (L) BLOCK
2-20. LOUDSPEAKER (6.5 cm) (SP3) (L-ch)
3front speaker (L) block
2three screws
(BVP-tite 3 u8)
1two screws
(PTPWH3 u8)
guide pin
ditch
Note 2: When installing the front
speaker (L) block, align
the guide pin and ditch.
– Rear bottom view –
Note 1: Please spread a sheet under
a unit not to injure front side.
2Remove the loudspeaker
(6.5 cm) (SP3) in the
direction of an arrow.
4loudspeaker (6.5 cm)
(SP3)
1two screws
(3.5)
1two screws
(3.5)
:LUHVHWWLQJ
loudspeaker (6.5 cm)
(SP3)
terminals position
(wide side) [blue]
terminals position
(narrow side) [black]
Note 1: When installing the loudspeaker (18 cm) (SP1),
make the position of terminals as shown
in the figure below.
–)URQWERWWRPYLHZ–
3 terminal (narrow side)
[black]
3 terminal (wide side)
[blue]
loudspeaker (6.5 cm) (SP3)
Note 2: When installing the speaker wire, make the
position of caulking of terminals is outside.
narrow side
[black]
wide side
[blue]

HT-ST7
20
2-21. LOUDSPEAKER (2 cm) (SP1) (L-ch)
1two screws
(3.5) 1two screws
(3.5)
1three screws
(3.5)
2Remove the baffle (L)
block in the direction
of an arrow.
4 screw (3.5) 4 screw (3.5)
5loudspeaker (2 cm)
(SP1)
loudspeaker (2 cm) (SP1) – Front bottom view –
3 terminal (narrow side)
[black]
3 terminal (wide side)
[red]
loudspeaker (2 cm) (SP1)
Note 1: When installing the loudspeaker (2 cm) (SP2),
match the terminal position with the marking.
– Baffle (L) block inner view –
terminal marking
Note 2: When installing the speaker wire, make the
position of caulking of terminals is outside.
narrow side
[black]
wide side
[red]
:ire VettinJ
MOUNTED board
speaker wire from MOUNTED board
:ire VettinJ
1screw (3.5)