DOWNLOAD Sony HT-CT380 / HT-CT381 / SA-CT380 / SA-CT381 Service Manual ↓ Size: 5.12 MB | Pages: 72 in PDF or view online for FREE

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)

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.

CAPACITOR  ELECTRICAL  DISCHARGE  PROCESSING 
When checking the board, for the electric shock prevention, con-
nect the resistors to both ends of capacitors to discharge the capaci-
tor as shown in the fi gure below.

Note 1: When the connector that connects the POWER board to the  MAIN 

board is disconnected before discharging, completely fi nish  dis-
charging both boards, and then reconnect the connector. If dis-
charging 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.

:/2 W

:/2 W

:/2 W

:/2 W

MODEL  IDENTIFICATION
Distinguish by Part No. and destination code on the bottom side of the main unit.

Part No.
Destination code

SA-CT380: US, CND

4-559-882-0[]

UC2

SA-CT380: AEP

4-559-883-0[]

CEL/B

SA-CT380: EA3

4-564-730-0[]

EA3

SA-CT380: LA

4-564-731-0[]

LA9

SA-CT381: AEP

4-564-737-0[]

CEL/S

SA-CT381: UK

4-565-719-0[]

CEK/S

SA-CT380: UK

4-565-720-0[]

CEK/B

SA-CT380: PX

4-565-721-0[]

PX3

SA-CT380: SP

4-565-722-0[]

SP1

SA-CT380: TH

4-565-723-0[]

TH1

SA-CT380: RU

4-565-727-0[]

RU3

SA-CT380: AR

4-565-728-0[]

AR2

SA-CT380: E3

4-565-729-0[]

E3

SA-CT380: AUS

4-565-730-0[]

AU1

DESTINATION  ABBREVIATIONS
The following abbreviations for model destinations are used in this 
service manual.

• Abbreviations
 AR  : 

Argentina 

model

 AUS : 

Australian 

model

  CND  : Canadian model
  E3 

: African and Iranian models

  EA3  : Saudi Arabia, UAE, Kuwait, Iraqi, Kenyan, Tanzanian and 

Nigerian models

  LA 

: Latin American model (Except for Brazilian and Argentina)

  RU 

: Russian model

  SP 

: Singapore model

 TH  : 

Thai 

model

ADVANCE  PREPARATION  WHEN  CONFIRMING  OP-
ERATION
All of the units included in the HT-CT380/CT381 (SA-CT380/
CT381, SA-WCT380/WCT381, Remote control) are required to 
confi rming operation of SA-CT380/CT381. Check in advance that 
you have all of the units.

NOTE  OF  REPLACING  THE  KEY  BOARD
When the KEY board is defective, replace the complete mounted 
board.

NOTE  OF  REPLACING  THE  IC1009,  IC1010,  IC1012,  
IC2008,  IC2009  AND  IC3109  ON  THE  MAIN  BOARD
IC1009, IC1010, IC1012, IC2008, IC2009 and IC3109 on the 
MAIN board cannot replace with single. When these parts are 
damaged, replace the complete mounted board.

NOTE  OF  REPLACING  THE  IC3001  ON  THE  MAIN  
BOARD  AND  THE  COMPLETE  MAIN  BOARD
When IC3001 on the MAIN board and the complete MAIN board 
are replaced, it is necessary to spread the compound between the 
MAIN board and the heat sink.
Spread the compound referring to the fi gure below.

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 pro-
cedure 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)

Parts in which the LINK will be disconnected due to re-
placement:
• 

Complete MAIN board

• 

IC1002 on the MAIN board (microprocessor)

• 

RF modulator (SWA12-4V TX) (Ref. No. RF1)

Set up the wireless subwoofer 
connection again.

1

2

Select [WS] with j „ (select), then 
press ENTER.

3

Select [LINK] with j „ (select), then 
press ENTER.

4

When [START] appears on the 
display, press ENTER.
[SEARCH] appears, and the Bar 
Speaker searches for a device that 
can be used with Link. Proceed to 
the next step within 1 minute.
To quit the Link function while 
searching for a device, press BACK.

5

Press LINK on the subwoofer.
The on/standby indicator on the 
subwoofer lights up in green. [OK] 
appears on the display of the Bar 
Speaker.
If [FAILED] appears, check to ensure 
the subwoofer is turned on and 
perform the process again from 
step 1.

6

Press MENU.
The menu turns off.

‚ Press the Ò/Æ (on/standby) button 

on the Bar Speaker to turn off the 
system. After the display stops 
flashing, disconnect the AC power 
cord (mains lead) then check that 
nothing is blocking the ventilation 
holes of the Bar Speaker.

BOND  FIXATION  OF  ELECTRIC  PARTS
When the following parts are replaced, fi x the parts by using the bond (SC608Z2) (Refer to the fi gure below).

Target parts:
< POWER board >
C902 or C906, C903 or C908, C904 or C905, C907 or C988, C914 or C915, C967, C970, C976, C978, C980, C990, D901, LF901, R914, 
R944, TH901, VDR901
(C978, C980: Except US and Canadian models only)

• 

This set can be disassembled in the order shown below.