Sony SA-WCT290, SA-WCT291 Schematic

SA-WCT290/WCT291

SERVICE MANUAL

Ver. 1.0 2017.02

Photo: SA-WCT290 (Black) Photo: SA-WCT290 (White) /

• SA-WCT290/WCT291 is the active subwoofer in HT-CT290/CT291.

• All the units included in the HT-CT290/CT291 (SA-CT290/CT291, SAWCT290/WCT291, remote control) are required to conﬁ rm the opera- tion of SA-CT290/CT291. Check in advance that you have all the units.

• For the TEST MODE for this unit, refer to the service manual of HT-CT290/CT291.

SPECIFICATIONS

Subwoofer (SA-WCT290/ SA-WCT291)

CH models:

POWER OUTPUT 50 W (at 4 ohms, 100 Hz)

Other models:

POWER OUTPUT (reference) 100 W (per channel at 4 ohms, 100 Hz) Speaker system Subwoofer system, Bass reflex Speaker 130 mm (5 Power requirements US, CND models: 120 V AC, 60 Hz LA9 models: 110 V – 240 V AC, 50/60 Hz EA models: 127 V – 240 V AC, 50/60 Hz Other models: 220 V – 240 V AC, 50/60 Hz Power consumption On: 15 W Standby: 0.5 W or less Dimensions (w/h/d) (approx.) 170 mm × 342 mm × 362 mm (6 (vertical installation) 342 mm × 172 mm × 362 mm (13 (horizontal installation) Mass (approx.)

6.3 kg (13 Ib 15 oz)

/8 in) cone type

/4 in × 131/2 in × 143/8 in)

/2 in × 67/8 in × 143/8 in)

Wireless transmitter/ receiver section

Frequency band

2.4 GHz (2.4000 GHz – 2.4835 GHz) Modulation method FHSS (Freq Hopping Spread Spectrum)

Design and specifications are subject to change without notice.

Copyrights and Trademarks

• This system incorporates Dolby* Digital. * Manufactured under license from Dolby Laboratories.

Dolby, Dolby Audio, and the double-D symbol are trademarks of Dolby Laboratories.

• The BLUETOOTH 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-Deﬁ nition Multimedia Inter- face (HDMI™) technology.

The terms HDMI and HDMI High-Deﬁ nition Multimedia

Interface, and the HDMI Logo are trademarks or registered trademarks of HDMI Licensing, LLC in the United States and other countries.

• “BRAVIA” is a trademark 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.

SA-WCT291

word mark and logos are registered

US Model

Canadian Model

E Model

Australian Model

SA-WCT290

AEP Model

UK Model

SA-WCT290/WCT291

• 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.

• “ClearAudio+” is a trademark of Sony Corporation.

• Other system and product names are generally trademarks or registered trademarks of the manufacturers. ™ and ® marks are not indicated in this document.

9-890-686-01

2017B80-1

2017.02

ACTIVE SUBWOOFER

Sony Corporation

Published by Sony EMCS (Malaysia) PG Tec

SA-WCT290/WCT291

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

1. SERVICING NOTES ............................................. 3

2. DISASSEMBLY

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

2-2. SUB MAIN Section ........................................................ 6

2-3. SUB MAIN Board .......................................................... 7

2-4. Switching Regulator ....................................................... 8

2-5. SUB KEY Board, Bluetooth Module .............................. 8

2-6. SUB LED Board, Front Panel Assy ................................ 9

2-7. Loudspeaker (130mm)-203-11 ....................................... 10

3. TROUBLESHOOTING .......................................... 11

4. DIAGRAMS

4-1. Block Diagram - AMP/PANEL/

POWER SUPPLY Section - ............................................ 13

4-2. Printed Wiring Board

- SUB MAIN Board (Component Side) - ....................... 15

4-3. Printed Wiring Board

- SUB MAIN Board (Conductor Side) - ......................... 16

4-4. Printed Wiring Board - SUB KEY Board - ..................... 17

4-5. Schematic Diagram - SUB KEY Board -........................ 17

4-6. Printed Wiring Board - SUB LED Board - ..................... 18

4-7. Schematic Diagram - SUB LED Board - ........................ 18

5. EXPLODED VIEWS

5-1. Back Panel Section ......................................................... 19

5-2. SUB MAIN Section ........................................................ 20

5-3. Speaker Cabinet Section ................................................. 21

1.5 kΩ0.15 μF

Earth Ground

voltmeter (0.75 V)

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

À LA SÉCURITÉ!

6. ELECTRICAL PARTS LIST .............................. 22

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.

SECTION 1

SERVICING NOTES

SA-WCT290/WCT291

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.

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.

– SWITCHING REGULATOR 3L411L Board (US, CND) (Conductor Side) – – SWITCHING REGULATOR 3L411W Board (Except US, CND, E12) (Conductor Side) – – SWITCHING REGULATOR 3L411W-1 Board (E12) (Conductor Side) –

C201

/2 W

800

MODEL IDENTIFICATION

Distinguish by Part No. and destination code on the rear side of the subwoofer.

– Rear view –

MODEL NUMBER LABEL

CAPACITOR ELECTRICAL DISCHARGE PROCESSING

When checking the board, for the electric shock prevention, connect the resistors to both ends of capacitors to discharge the capacitor as shown in the ﬁ gure below.

Note 1: When the connector that connects the SWITCHING

REGULATOR 3L411L board (US, CND) or SWITCHING REGULATOR 3L411W board (Except US, CND, E12) or SWITCHING REGULATOR 3L411W-1 board (E12) to the SUB MAIN board is disconnected before discharging, completely ﬁ nish discharging both boards, and then reconnect the connector. If discharging is not complete, sparking may occur when connecting the connector and cause a blown fuse.

Note 2: Be sure to discharge using a resistor of 800 Ω or higher. (Do not discharge with a 0 Ω resistor) Discharging at a point where excessive electric current ﬂ ows

through a fuse may cause the fuse to blow.

– SUB MAIN Board (Component Side) –

800 :/

2 W

C8138

C8140

Model Part No.

SA-WCT290 (Black): US, CND

SA-WCT290 (Black): AEP

SA-WCT290 (Black): UK

SA-WCT290 (Black): RU

SA-WCT290 (Black): E12

SA-WCT290 (Black): E3

SA-WCT290 (Black): EA

SA-WCT290 (Black): SP

SA-WCT290 (Black): AUS

SA-WCT290 (Black): TH

SA-WCT290 (Black): LA9

SA-WCT291 : AEP

SA-WCT291 : UK

SA-WCT291 : RU

SA-WCT290 (White): EA

SA-WCT290 (White): SP

SA-WCT290 (White): TH

Destination code

Part No.

4-688-018-0[]

4-688-018-1[]

4-688-018-2[]

4-688-018-3[]

4-688-018-4[]

4-688-018-5[]

4-688-018-6[]

4-688-018-7[]

4-688-018-9[]

4-688-019-0[]

4-688-019-2[]

4-688-020-0[]

4-688-020-1[]

4-688-020-2[]

4-693-270-2[]

4-693-270-3[]

4-693-270-5[]

• Abbreviation AUS : Australian model CND : Canadian model E3 : 240 V AC area in E model E12 : 220-240 V AC area in E model EA : Saudi Arabia model LA9 : Latin-American model RU : Russian Model SP : Singapore model TH : Thai model

SA-WCT290/WCT291

ADVANCE PREPARATION WHEN CONFIRMING OPERATION

All the units included in the HT-CT290/HT-CT291 (SA-CT290/ CT291, SA-WCT290/WCT291, remote control) are required to conﬁ rm the operation of SA-CT290/CT291. Check in advance that you have all the units.

NOTE OF REPLACING THE IC8104 ON THE SUB MAIN BOARD AND THE COMPLETE SUB MAIN BOARD

When IC8104 on the SUB MAIN board and the complete SUB MAIN board are replaced, it is necessary to spread the compound between the SUB MAIN board and the heat sink. Spread the compound referring to the ﬁ gure below.

– SUB MAIN Board (Component Side) –

compound

IC8104

NOTES ON THE WIRELESS CONNECTION (LINK) AFTER REPAIRS ARE COMPLETE

When the parts below is replaced, the wireless connection (LINK) of the Bar speaker and Subwoofer will be disconnected. Before returning repaired products to the customer, follow the procedure below to LINK the Bar speaker and Subwoofer. Also, if only the Bar speaker or Subwoofer is brought in for repair and the parts below are replaced, be sure to inform the customer when returning the repaired products that the customer must LINK the Bar speaker and Subwoofer. (Indicate that the LINK procedure is described in the operating instructions)

THE ON/STANDBY INDICATOR FLASHES IN RED

 If the power indicator ﬂashes in red,

press Æ on the subwoofer to turn o the power and check whether the ventilation opening of the subwoofer is blocked or not.

BOND FIXATION OF ELECTRIC PARTS

When SWITCHING REGULATOR 3L411L board (US, CND) or SWITCHING REGULATOR 3L411W board (Except US, CND, E12) or SWITCHING REGULATOR 3L411W-1 board (E12) is replaced, it is necessary to ﬁ x parts to the boards by using a speci- ﬁ ed bond without fail.

• Object boards

1. SWITCHING REGULATOR 3L411L board (US, CND)

2. SWITCHING REGULATOR 3L411W board (Except US, CND, E12)

3. SWITCHING REGULATOR 3L411W-1 board (E12)

• Use bond

Part No. Description

7-600-020-70 ADHESIVE (SC608Z2) 180ML

• Parts position

1. SWITCHING REGULATOR 3L411L board

(US, CND) (page 4)

2. SWITCHING REGULATOR 3L411W board

(Except US, CND, E12) (page 5)

3. SWITCHING REGULATOR 3L411W-1 board

(E12) (page 5)

1. SWITCHING REGULATOR 3L411L board (US, CND)

Parts in which the LINK will be disconnected due to replacement:

• Complete SUB MAIN board

• BLUETOOTH MODULE (WB116A Y) (Ver C)

Activating wireless transmission between speciﬁ c units (Secure Link)

You can specify the wireless connection to link the Bar Speaker to the subwoofer using the Secure Link function. This function can help prevent interference if you use multiple wireless products.

1 Press LINK on the rear of the

subwoofer.

The power indicator on the subwoofer ﬂashes in orange.

2 Hold down CLEAR AUDIO+ for

5 seconds.

The USB and TV indicators ﬂash two times, then the MOVIE and MUSIC indicators ﬂash alternately. When the Bar Speaker is linked to the subwoofer, the indicators stop ﬂashing and the power indicator on the subwoofer lights up in orange. If it failed, the indicators light up for 5 seconds. Try again the above operation.

– SWITCHING REGULATOR 3L411L board

(US, CND) (Component Side) –

To deactivate this function, hold down CLEAR AUDIO+ for 5seconds.

The USB indicator ﬂashes twice.

*The portion which applies bond:

2. SWITCHING REGULATOR 3L411W board (Except US, CND, E12)

– SWITCHING REGULATOR 3L411W board

(Except US, CND, E12) (Component Side) –

SA-WCT290/WCT291

*The portion which applies bond:

3. SWITCHING REGULATOR 3L411W-1 board (E12)

– SWITCHING REGULATOR 3L411W-1 board

(E12) (Component Side) –

*The portion which applies bond:

SA-WCT290/WCT291

SECTION 2

DISASSEMBLY

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

2-1. DISASSEMBLY FLOW

SET

2-2. SUB MAIN SECTION (Page 6)

2-3. SUB MAIN BOARD (Page 7)

2-4. SWITCHING REGULATOR (Page 8)

2-5. SUB KEY BOARD, BLUETOOTH MODULE (Page 8)

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

2-6. SUB LED BOARD, FRONT PANEL ASSY (Page 9)

2-7. LOUDSPEAKER (130mm)-203-11 (Page 10)

2-2. SUB MAIN SECTION



JIG When disassembling the unit, use the following jig for speaker removal.

Part No. Description J-2501-238-A JIG FOR SPEAKER REMOVAL

2 Remove the SUB MAIN section in the direction of the arrow.

4 CN8103 (4P)

3 CN8104 (3P)

1 seven screws (1) (3.5 u 14), TAPPING

5 SUB MAIN section

1 seven screws

– Rear view –

(1) (3.5 u 14), TAPPING

2-3. SUB MAIN BOARD

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

to “NOTES ON THE WIRELESS CONNECTION (LINK) AFTER REPAIRS ARE COMPLETE” on page 4.

:LUHVHWWLQJ

SUB KEY board

wire (flat type) (9 core)

SWITCHING REGULATOR

SA-WCT290/WCT291

stopper, wiring

SUB MAIN board

2 wire (flat type)

(9 core) (CN8101)

7 two screws (+BVTP 3 u 8)

6 heat sink Note 2:

the compound referring to “NOTE OF REPLACING THE IC8104 ON THE SUB MAIN BOARD AND THE COMPLETE SUB MAIN BOARD” on servicing notes (page 4).

When installing the heat sink, spread

5 two screws (+BVTP 3 u 10)

3 stopper, wiring

1 wire (flat type)

(26 core) (CN8100)

4 CN8102 (10P)

IC8104

8 SUB MAIN board

7 two screws

(+BVTP 3 u 8)

SA-WCT290/WCT291

2-4. SWITCHING REGULATOR

2 one screw (+BVTP 3 u 8)

2 three screws (+BVTP 3 u 8)

3 stopper, wiring

1 CN1 (2P)

2 one screw

(+BVTP 3 u 8)

4 SWITCHING REGULATOR 3L411W (EXCEPT US, CND, E12) SWITCHING REGULATOR 3L411W-1 (E12) SWITCHING REGULATOR 3L411L (US, CND)

• Abbreviation CND : Canadian model E12 : 220-240 V AC area in E model

2-5. SUB KEY BOARD, BLUETOOTH MODULE

Note: When the BLUETOOTH module is replaced, refer to

“NOTES ON THE WIRELESS CONNECTION (LINK) AFTER REPAIRS ARE COMPLETE” on page 4.

3 one screw (+BVTP 3 u 8)

2 SUB KEY board

1 two screws

(+BVTP 3 u 10)

7 BLUETOOTH module

5 one screw

(+BVTP 3 u 8)

4 button, SW

6 cushion saranet

+ 16 hidden pages

Sony SA-WCT290, SA-WCT291 Schematic

TABLE OF CONTENTS

SERVICING NOTES

DISASSEMBLY

2-1. DISASSEMBLY FLOW

2-2. SUB MAIN SECTION

2-3. SUB MAIN BOARD

2-4. SWITCHING REGULATOR

2-5. SUB KEY BOARD, BLUETOOTH MODULE