Sony HT-CT550W / SA-WCT550W Service Manual ▷ View online
SERVICE MANUAL
Sony Corporation
Published by Sony Techno Create Corporation
SA-WCT550W
SPECIFICATIONS
ACTIVE SUBWOOFER
9-893-125-02
2011E05-1
©
2011.05
US Model
Canadian Model
AEP Model
UK Model
Taiwan Model
Ver. 1.1 2011.05
• SA-WCT550W is the active subwoofer
in HT-CT550W.
• All of the units included in the HT-
CT550W (SA-WCT550W (main unit)/
SS-CT550W/STR-CT550WT/EZW-
RT50) are required to confi rming opera-
tion of the main unit. Check in advance
that you have all of the units.
SS-CT550W/STR-CT550WT/EZW-
RT50) are required to confi rming opera-
tion of the main unit. Check in advance
that you have all of the units.
• For the test modes for this unit, refer to the service manual of STR-CT550WT.
Subwoofer
Amplifier section
POWER OUTPUT (reference)
134 W (per channel at
4 ohms, 100 Hz)
4 ohms, 100 Hz)
Speaker system
Subwoofer, Bass reflex
Speaker unit
160 mm (6 3/8 in) cone
type
type
Rated impedance
4 ohms
Power requirements
120 V AC, 60 Hz
Power consumption
On: 30 W
Standby mode: 0.5 W or less
Standby mode: 0.5 W or less
Dimensions (approx.)
270 mm × 389 mm ×
280.5 mm (10 3/4 in ×
15 3/8 in × 11 1/8 in)
(w/h/d)
280.5 mm (10 3/4 in ×
15 3/8 in × 11 1/8 in)
(w/h/d)
Mass (approx.)
8.8 kg (19 lb 7 oz)
Design and specifications are subject to change without
notice.
notice.
s Standby power consumption 0.5 W or less.
s Over 85 % power efficiency of amplifier block is
s Over 85 % power efficiency of amplifier block is
achieved with the full digital amplifier, S-Master.
(US and Canadian models)
220 - 240 V AC, 50/60 Hz
(AEP and UK models)
120 V AC, 50/60 Hz
(Taiwan model)
220 - 240 V AC, 50/60 Hz
(AEP and UK models)
120 V AC, 50/60 Hz
(Taiwan model)
This system incorporates Dolby* Digital and the
DTS** Digital Surround System.
DTS** Digital Surround System.
* Manufactured under license from Dolby
Laboratories.
Dolby, and the double-D symbol are trademarks of
Dolby Laboratories.
Dolby, and the double-D symbol are trademarks of
Dolby Laboratories.
** Manufactured under license under U.S. Patent #’s:
5,451,942; 5,956,674; 5,974,380; 5,978,762;
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, DTS-HD and the
Symbol are registered trademarks, & DTS-HD
Master Audio, and the DTS logos are trademarks of
DTS, Inc. Product includes software. © DTS, Inc.
All Rights Reserved.
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, DTS-HD and the
Symbol are registered trademarks, & DTS-HD
Master Audio, and the DTS logos are trademarks of
DTS, Inc. Product includes software. © DTS, Inc.
All Rights Reserved.
This system incorporates High-Definition Multimedia
Interface (HDMI
Interface (HDMI
™
) technology.
HDMI, the HDMI Logo, and High-Definition
Multimedia Interface are trademarks or registered
trademarks of HDMI Licensing LLC in the United
States and other countries.
Multimedia Interface 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.Colour (x.v.Color)” and “x.v.Colour (x.v.Color)”
logo are trademarks of Sony Corporation.
logo are trademarks of Sony Corporation.
“PlayStation
®
” is a registered trademark of Sony
Computer Entertainment Inc.
SA-WCT550W
2
NOTES ON CHIP COMPONENT REPLACEMENT
• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be dam-
• 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.
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
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.
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)
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 kΩ
0.15 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
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
REPLACE THESE COMPONENTS WITH SONY PARTS
WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS
MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY.
MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY.
ATTENTION AU COMPOSANT AYANT RAPPORT
À LA SÉCURITÉ!
LES COMPOSANTS IDENTIFIÉS PAR UNE MARQUE
0 SUR
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.
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.
1.
SERVICING NOTES
............................................. 3
2. DISASSEMBLY
2-1. Disassembly
Flow
........................................................... 4
2-2. AMP
Block
..................................................................... 5
2-3. Plate Top (AMP), Fuse (F900) ........................................ 6
2-4. SUB MAIN Board .......................................................... 6
2-5. POWER
2-4. SUB MAIN Board .......................................................... 6
2-5. POWER
Board
................................................................ 7
2-6. Loudspeaker (16 cm) (SP100) ........................................ 7
3. DIAGRAMS
3-1. Block
Diagram
................................................................ 8
3-2. Printed
Wiring
Board
- SUB MAIN Board (Component Side) - ....................... 10
3-3. Printed
Wiring
Board
- SUB MAIN Board (Conductor Side) - ......................... 11
3-4. Schematic Diagram - SUB MAIN Board - ..................... 12
3-5. Printed
3-5. Printed
Wiring
Boards
- LED CONNECT, FRONT LED Boards - .................... 13
3-6. Schematic
Diagram
- LED CONNECT, FRONT LED Boards - .................... 13
3-7. Printed Wiring Board - POWER Board - ........................ 14
3-8. Schematic Diagram - POWER Board - .......................... 15
3-8. Schematic Diagram - POWER Board - .......................... 15
4.
EXPLODED VIEWS
4-1. Speaker
Section
............................................................... 20
4-2. AMP
Section
................................................................... 21
5.
ELECTRICAL PARTS LIST
.............................. 22
TABLE OF CONTENTS
SA-WCT550W
3
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
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
• 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.
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
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.
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.
also be added to ordinary solder.
MODEL IDENTIFICATION
– Model Number Label –
Power
Voltage
Indication
Voltage
Indication
Model
Power Voltage Indication
US and Canadian models
- 120V 60Hz 30W
AEP and UK models
- 220-240V 50/60Hz 30W
Taiwan model
- 120V 50/60Hz 30W
ADVANCE PREPARATION WHEN CONFIRMING OP-
ERATION
All of the units included in the HT-CT550W (SA-WCT550W (main
unit)/SS-CT550W/STR-CT550WT/EZW-RT50) are required to
confi rming operation of the main unit. Check in advance that you
have all of the units.
ERATION
All of the units included in the HT-CT550W (SA-WCT550W (main
unit)/SS-CT550W/STR-CT550WT/EZW-RT50) are required to
confi rming operation of the main unit. Check in advance that you
have all of the units.
NOTE OF REPLACING THE IC104 ON THE SUB MAIN
BOARD AND THE COMPLETE SUB MAIN BOARD
When IC104 on the SUB MAIN board and the complete SUB
MAIN board are replaced, it is necessary to spread the compound
(THERMAL COMPOUND G747) (Part No. J-2501-221-A) be-
tween the sub main board and the heat sink.
Spread the compound referring to the fi gure below.
BOARD AND THE COMPLETE SUB MAIN BOARD
When IC104 on the SUB MAIN board and the complete SUB
MAIN board are replaced, it is necessary to spread the compound
(THERMAL COMPOUND G747) (Part No. J-2501-221-A) be-
tween the sub main board and the heat sink.
Spread the compound referring to the fi gure below.
– SUB MAIN Board (Component Side) –
thermal compound G747
IC104
CAPACITOR ELECTRICAL DISCHARGE PROCESSING
When checking the board, for the electric shock prevention, con-
nect the resistors to both ends of respective capacitor (C935 or
C936) to discharge the capacitor (C935 or C936).
When checking the board, for the electric shock prevention, con-
nect the resistors to both ends of respective capacitor (C935 or
C936) to discharge the capacitor (C935 or C936).
– POWER Board (Conductor Side) –
800
:/2 W
C935 (US, Canadian and Taiwan models)
C936 (AEP and UK models)
ABOUT THE LINK/STANDBY INDICATOR
LINK/STANDBY Indicator
You can check the status of wireless transmission between the
receiver (STR-CT550WT) and the subwoofer (SA-WCT550W:
main unit).
• Turns green:
The system is turned on,wireless transmission is activated and
receiver (STR-CT550WT) and the subwoofer (SA-WCT550W:
main unit).
• Turns green:
The system is turned on,wireless transmission is activated and
sound signals are being received.
• Turns amber:
The system is turned on,wireless transmission is activated with
The system is turned on,wireless transmission is activated with
the Secure Link function, and sound signals are being received.
• Flashes in green quickly:
The wireless transceiver is not inserted correctly into the wireless
The wireless transceiver is not inserted correctly into the wireless
transceiver (EZW-RT50/EZW-RT20) slot.
• Flashes in green or amber slowly:
Wireless transmission is not activated.
• Turns red:
The subwoofer is in standby mode
About the standby mode
The subwoofer enters standby mode automatically (the LINK/
STANDBY indicator turns red) when the receiver is in standby
mode or wireless transmission is not activated. The subwoofer
turns on automatically (the LINK/STANDBY indicator turns
green) when the receiver is turned on and wireless transmission
is activated.
• Turns off:
The subwoofer is turned off.
• Flashes in red:
The subwoofer’s protection is activated
If “PROTECTOR” and “PUSH POWER” appear alternate-
ly on the front panel display.
Press
Wireless transmission is not activated.
• Turns red:
The subwoofer is in standby mode
About the standby mode
The subwoofer enters standby mode automatically (the LINK/
STANDBY indicator turns red) when the receiver is in standby
mode or wireless transmission is not activated. The subwoofer
turns on automatically (the LINK/STANDBY indicator turns
green) when the receiver is turned on and wireless transmission
is activated.
• Turns off:
The subwoofer is turned off.
• Flashes in red:
The subwoofer’s protection is activated
If “PROTECTOR” and “PUSH POWER” appear alternate-
ly on the front panel display.
Press
?/1
to turn off the system, and check the following item
after “STANDBY” disappears.
• Is anything blocking the ventilation holes of the receiver?
If the receiver still does not operate properly after per-
forming the above measures, reset the receiver as fol-
lows:
Use buttons on the receiver for the operation.
1 Press
forming the above measures, reset the receiver as fol-
lows:
Use buttons on the receiver for the operation.
1 Press
?/1
to turn on the power.
2 Press
?/1
while pressing INPUT SELECTOR and
VOLUME –.
“COLD RESET” appears and the receiver is reset. AMP menu,
sound fi eld, etc., return to the default settings.
sound fi eld, etc., return to the default settings.
Ver. 1.1
SA-WCT550W
4
SECTION 2
DISASSEMBLY
• This set can be disassembled in the order shown below.
2-1. DISASSEMBLY FLOW
SET
2-2. AMP
BLOCK
(Page
5)
2-3. PLATE TOP (AMP), FUSE (F900)
(Page
(Page
6)
2-4. SUB MAIN BOARD
(Page
(Page
6)
2-5. POWER
BOARD
(Page
7)
2-6. LOUDSPEAKER (16 cm) (SP100)
(Page
(Page
7)