Sony HT-CT380 User manual

SERVICE MANUAL
Sony Corporation
Published by Sony Techno Create Corporation
HT-CT380/CT381
SA-CT380/CT381
SPECIFICATIONS
HT-CT380/CT381
SOUND BAR
SA-CT380/CT381
ACTIVE SPEAKER SYSTEM
9-896-145-02
2015D33-1
© 2015.04
US Model
Canadian Model
E Model
Australian Model
PX Model
HT-CT380/SA-CT380
AEP Model
UK Model
HT-CT380/CT381/SA-CT380/CT381
Ver. 1.1 2015.04
• All of the units included in the HT-
CT380/CT381 (SA-CT380/CT381,
SA-WCT380/WCT381, Remote con-
trol) are required to confirming opera-
tion of SA-CT380/CT381. Check in
advance that you have all of the units.
COMPONENT MODEL NAME
HT-CT380 HT-CT381
Bar Speaker (Active Speaker System) SA-CT380 SA-CT381
Subwoofer (Active Subwoofer) SA-WCT380 SA-WCT381
Amplifier section
U.S. models:
POWER OUTPUT AND TOTAL HARMONIC
DISTORTION:
(FTC)
Front L + Front R:
With 4 ohms loads, both channels
driven, from 200 Hz - 20,000 Hz; rated
35 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: 100 Watts (per
channel at 4 ohms, 1 kHz)
Other models:
POWER OUTPUT (rated)
Front L + Front R:
50 W + 50 W (at 4 ohms, 1 kHz, 1%
THD)
POWER OUTPUT (reference)
Front L/Front R: 100 Watts (per
channel at 4 ohms, 1 kHz)
Inputs
HDMI IN* 1/2/3
ANALOG IN
DIGITAL IN (TV)
Outputs
HDMI OUT (ARC)
HDMI Section
Connector
Type A (19pin)
BLUETOOTH section
Communication system
BLUETOOTH Specification version 3.0
Output
BLUETOOTH Specification 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 profiles2)
A2DP 1.2 (AdvancedAudio Distribution
Profile)
AVRCP 1.3 (Audio Video Remote
Control Profile)
Supported Codecs3)
SBC4) , AAC5)
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 fields around a
microwave oven, static electricity,
cordless phone, reception sensitivity,
operating system, software application,
etc.
2) BLUETOOTH standard profiles 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 section
Speaker system
Full range speaker system,
Acoustic suspension
Speaker
General
Power requirements
120 V AC, 60 Hz (US and Canadian models)
110 V - 240 V AC, 50 Hz/60 Hz (PX model)
220 V - 240 V AC, 50 Hz/60 Hz (Other models)
Power consumption
Dimensions (approx.) (w/h/d)
Mass (approx.)
2.4 kg (5 lb 4 5/8oz)
Supplied accessories
Remote control (1)
R03 (size AAA) batteries (2)
Optical digital cable (1)
Wall mounting brackets (2) and screws (2)
Speaker pads for the subwoofer (4)
Startup Guide (1)
Operating Instructions (1)
Speaker system
Wireless Sound Specification version
2.0
Frequency band
2.4 GHz (2.4000 GHz - 2.4835 GHz)
Modulation method
Pi / 4 DQPSK
Design and specifications are subject to
change without notice.
Wireless transmitter section
* The 1, 2, and 3 jacks are
identical. Using any of them makes no
difference.
900 mm × 51 mm × 117 mm (35 1/2in ×
21
/8in × 4 5/8in) (without wall
mounting brackets)
900 mm × 120 mm × 72 mm (35 1
/2in ×
43/4in × 2 7/8in) (with wall mounting
brackets)
60 mm (2 3/8in) cone type
On: 37 W
Standby: 0.3 W or less
(at the Power saving mode)
Standby: 0.5 W or less
(When [S. THRU] is [ON]: 6 W or less)
• Please refer to service manual separately issued for Subwoofer.
Note:
Be sure to keep your PC used for service and
checking of this unit always updated with the
latest version of your anti-virus software.
In case a virus affected unit was found during
service, contact your Service Headquarters.
Photo: SA-CT380

HT-CT380/CT381
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.
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.
** For DTS patents, see http://
patents.dts.com. Manufactured
under license from DTS Licensing
Limited. DTS, DTS-HD, the Symbol, &
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.
This system incorporates High-
Definition Multimedia Interface
(HDMI™) technology.
The terms HDMI and HDMI High-
Definition Multimedia Interface, and the
HDMI Logo are trademarks or registered
trademarks of HDMI Licensing LLC in the
United States and other countries.
The N Mark is a trademark or registered
trademark of NFC Forum, Inc. in the
United States and in other countries.
Android™ and Google Play™ are
trademarks of Google Inc.
Copyrights and Trademarks
Apple, the Apple logo, iPhone, iPod, and
iPod touch are trademarks of Apple Inc.,
registered in the U.S. and other
countries. App Store is a service mark of
Apple Inc.
“Made for iPod,” and “Made for iPhone”
mean that an electronic accessory has
been designed to connect specifically to
iPod or iPhone, respectively, and has
been certified by the developer to meet
Apple performance standards. Apple is
not responsible for the operation of this
device or its compliance with safety and
regulatory standards. Please note that
the use of this accessory with iPod or
iPhone may affect wireless
performance.
Compatible iPod/iPhone models
T
he compatible iPod/iPhone models
are as follows. Update your iPod/iPhone
with the latest software before using
with the system.
BLUETOOTH technology works with:
iPhone 6 Plus/iPhone 6/iPhone 5s/
iPhone 5c/iPhone 5/iPhone 4s/
iPhone 4/iPhone 3GS
iPod touch (5th generation)/iPod touch
(4th generation)
“BRAVIA” logo is a trademark of Sony
Corporation.
“DSEE” is a trademark of Sony
Corporation.
“ClearAudio+” is a trademark of Sony
Corporation.
“x.v.Color” and “x.v.Color” logo are
trademarks of Sony Corporation.
“PlayStation®” is a registered trademark
of Sony Computer Entertainment Inc.
Other trademarks and trade names are
those of their respective owners.
DTS and the Symbol together are
registered trademarks of DTS, Inc.
© DTS, Inc. All Rights Reserved.
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.

HT-CT380/CT381
3
1. SERVICING NOTES ............................................. 4
2. DISASSEMBLY
2-1. Disassembly Flow........................................................... 7
2-2. Cabinet Top Block .......................................................... 8
2-3. Loudspeaker (6 cm) (L-ch, R-ch) (SP1, SP2)................. 9
2-4. NFC Module (NFC1)...................................................... 10
2-5. DISPLAY Board ............................................................. 11
2-6. POWER Board................................................................ 12
2-7. Connection Cable with Speaker (L-ch, R-ch)
(SPC1, SPC2).................................................................. 13
2-8. KEY Board Block ........................................................... 14
2-9. Button, KEY Board......................................................... 15
2-10. RF Modulator (RF1) ....................................................... 16
2-11. MAIN Board ................................................................... 17
2-12. Power Cord (AC1) .......................................................... 18
2-13. Bluetooth Module (BT1) ................................................ 19
2-14. Chassis (Main) Block...................................................... 20
2-15. Service Position .............................................................. 21
3. TEST MODE ............................................................ 22
4. TROUBLESHOOTING .......................................... 27
5. DIAGRAMS
5-1. Block Diagram - HDMI Section -................................... 31
5-2. Block Diagram - MAIN Section -................................... 32
TABLE OF CONTENTS
5-3. Block Diagram - AMP Section -..................................... 33
5-4. Block Diagram
- PANEL/POWER SUPPLY Section -............................ 34
5-5. Printed Wiring Boards - MAIN Section (1/2) - .............. 36
5-6. Printed Wiring Board - MAIN Section (2/2) -................ 37
5-7. Schematic Diagram - MAIN Section (1/6) -................... 38
5-8. Schematic Diagram - MAIN Section (2/6) -................... 39
5-9. Schematic Diagram - MAIN Section (3/6) -................... 40
5-10. Schematic Diagram - MAIN Section (4/6) -................... 41
5-11. Schematic Diagram - MAIN Section (5/6) -................... 42
5-12. Schematic Diagram - MAIN Section (6/6) -................... 43
5-13. Printed Wiring Board - DISPLAY Board - ..................... 44
5-14. Schematic Diagram - DISPLAY Board -........................ 45
5-15. Printed Wiring Board - POWER Board -........................ 46
5-16. Schematic Diagram - POWER Board - .......................... 47
6. EXPLODED VIEWS
6-1. Overall Section ............................................................... 57
6-2. Top Cabinet Section........................................................ 58
6-3. Bottom Cabinet Section .................................................. 59
6-4. MAIN Board Section ...................................................... 60
7. ELECTRICAL PARTS LIST .............................. 61
Accessories are given in the last of the electrical parts list.

HT-CT380/CT381
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.
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 respective capacitors to discharge
the capacitor.
Note 1: When the connector that connects the POWER board to the MAIN
board is disconnected before discharging, completely finish 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 Ωor higher.
(Do not discharge with a 0 Ωresistor)
Discharging at a location where excessive electric current flows
through a fuse may cause the fuse to blow.
– MAIN Board (Side A) –
C3015
C3016
800 :/2 W
800 :/2 W
– POWER Board (Conductor Side) –
C967
800 :/2 W
800 :/2 W
C914 (US and Canadian models)
C915 (Except US and Canadian models)
The SERVICING NOTES contains important information for servicing. Be sure to read this section before repairing the unit.
MODEL IDENTIFICATION
Distinguish by Part No., destination code and color on the bottom side of the main unit.
– Bottom view –
MODEL LABEL
Part No.
Destination code
Model 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-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: E3 4-565-729-0[] E3
SA-CT380: AUS 4-565-730-0[] AU1
Ver. 1.1

HT-CT380/CT381
5
DESTINATION ABBREVIATIONS
The following abbreviations for model destinations are used in this
service manual.
• Abbreviations
AUS : Australian model
CND : Canadian model
E3 : African and Iranian models
EA3 : Saudi Arabia, UAE, Kuwait, Iraqi, Kenyan, Tanzanian and
Nigerian models
SP : Singapore 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
confirming 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 figure below.
– MAIN Board (Side A) –
IC3001
compound
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)
Linking the system (Link to the Subwoofer)
Set up the wireless subwoofer
connection again.
1Press MENU.
2Select [WS] with
j

(select), then
press ENTER.
3Select [LINK] with
j

(select), then
press ENTER.
4When [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.
5Press 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.
6Press MENU.
The menu turns off.
IF “PRTECT (PROTECT)” APPEARS ON THE FRONT
PANEL DISPLAY OF THE BAR SPEAKER
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.
Ver. 1.1

HT-CT380/CT381
6
BOND FIXATION OF ELECTRIC PARTS
When complete POWER board or the following parts are replaced, it is necessary to fix the parts by using the bond (SC608Z2) (Refer to
the figure below).
• 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)
– POWER Board (Component Side) –
C914/915
C902/906
C903/908
C907/988
D901
TH901
LF901
C904/905
VDR901
R914
R944
C967
C970
C990
C976
C980
C978
(Except US and Canadian models only)
Ver. 1.1

HT-CT380/CT381
7
SECTION 2
DISASSEMBLY
• This set can be disassembled in the order shown below.
2-1. DISASSEMBLY FLOW
SET
2-14. CHASSIS (MAIN) BLOCK
(Page 20)
2-12. POWER CORD (AC1)
(Page 18)
2-13. BLUETOOTH MODULE (BT1)
(Page 19)
2-8. KEY BOARD BLOCK
(Page 14)
2-9. BUTTON, KEY BOARD
(Page 15)
2-11. MAIN BOARD
(Page 17)
2-2. CABINET TOP BLOCK
(Page 8)
2-15. SERVICE POSITION
(Page 21)
2-3. LOUDSPEAKER (6 cm) (L-CH, R-CH) (SP1, SP2)
(Page 9)
2-4. NFC MODULE (NFC1)
(Page 10)
2-5. DISPLAY BOARD
(Page 11)
2-6. POWER BOARD
(Page 12)
2-7. CONNECTION CABLE WITH SPEAKER
(L-CH, R-CH) (SPC1, SPC2)
(Page 13)
2-10. RF MODULATOR (RF1)
(Page 16)

HT-CT380/CT381
8
Note: Follow the disassembly procedure in the numerical order given.
2-2. CABINET TOP BLOCK
1seven screws
(BVTP3 u10)
1seven screws
(BVTP3 u10)
1five screws
(BVTP3 u10)
– Bottom view –
6 cabinet top block
– Rear view –
loudspeaker (6 cm) (L-ch) (SP1)
:LUHVHWWLQJ
[gray]
(wide side)
[black]
(narrow side)
2Remove the cabinet top
block in the direction of
the arrow.
4flexible flat cable
(18 core) (FFC3)
(CN1002)
3filament tape
(sub material)
terminal [red]
(wide side)
terminal [gray]
(wide side)
terminal [black]
(narrow side)
terminal [black]
(narrow side)
5Push the protrusion,
and remove the
terminal (narrow side).
protrusion
Push
5Push the protrusion,
and remove the
terminal (wide side).
protrusion
Push
5Push the protrusion,
and remove the
terminal (wide side).
5Push the protrusion,
and remove the
terminal (narrow side).
protrusion
Push
loudspeaker (6 cm) (R-ch) (SP2)
:LUHVHWWLQJ
[red]
(wide side)
[black]
(narrow side)
)OH[LEOHIODWFDEOH))&VHWWLQJ
CN1002
flexible flat cable
(FFC3)
filament tape
(sub material)
front
side terminal face
protrusion
Push
colored line
Insert straight into the interior.
flexible flat
cable
connector
OK
colored line
Insert at a slant.
flexible flat
cable
connector
NG
+RZWRLQVWDOOWKHIOH[LEOHIODWFDEOH
When installing the flexible flat cable, ensure that
the colored line is parallel to the connector after insertion.
Note: Please spread a sheet under a
unit not to injure cabinet top.

HT-CT380/CT381
9
2-3. LOUDSPEAKER (6 cm) (L-CH, R-CH) (SP1, SP2)
/RXGVSHDNHUFP5FK63setting
narrow terminal side wide terminal side
2loudspeaker (6 cm)
(R-ch) (SP2)
1four screws
(3.5)
loudspeaker (6 cm)
(R-ch) (SP2)
“R” mark
front side
outside inside
/RXGsSeDNeUFP/FK63setting
narrow terminal side wide terminal side
2loudspeaker (6 cm)
(L-ch) (SP1)
1four screws
(3.5)
loudspeaker (6 cm)
(L-ch) (SP1)
front side
–&DEinettRSERttRPYieZ–
inside outside
rear side
cabinet top block
left side
right side
front side
Note 2: Please spread a sheet under a
unit not to injure cabinet top.
Note 1: When installing the loudspeaker
(6 cm) (R-ch) (SP2), check the
presence of a "R" mark.

HT-CT380/CT381
10
2-4. NFC MODULE (NFC1)
3Peel off the
release paper.
4Install the NFC
module (NFC1) to
the cabinet top.
2flexible flat cable
(6 core) (FFC4)
5Slant to insert the
sheet (NFC) into
the slot.
slot
1Paste the double
adhesive tape (NFC).
NFC module
(NFC1)
6Insert the sheet
(NFC) in the
other slot.
sheet (NFC)
NFC module
(NFC1)
filament tape
(sub material)
flexible flat cable
(6 core) (FFC4)
Terminal face is
below side.
sheet (NFC) slot
colored line
Insert straight into the interior.
flexible flat
cable
connector
OK
colored line
Insert at a slant.
flexible flat
cable
connector
NG
How to install the flexible flat cable
When installing the flexible flat cable,
ensure that the colored line is parallel
to the connector after insertion.
How to install the NFC module (NFC1)
Note: Please spread a sheet under a
unit not to injure cabinet top.
4sheet (NFC)
2Peel off the double
adhesive tape (NFC).
5NFC module
(NFC1)
3flexible flat cable
(6 core) (FFC4)
1filament tape
(sub material)
– Cabinet top bottom view –
– NFC module bottom view –
rear side
cabinet top block
left side
right side
front side
Flexible flat cable (FFC) settinJ

HT-CT380/CT381
11
2-5. DISPLAY BOARD
6flexible flat cable
(6 core) (FFC4) (CN804)
4flexible flat cable
(18 core) (FFC3) (CN803)
1two screws
(BVTP3 u8)
1two screws
(BVTP3 u8)
8two screws
(BVTP3 u8)
8two screws
(BVTP3 u8)
7packing (CZ2)
0DISPLAY board
9cover (FL-CZ2) assy
5non woven fabric
(T0.3)
2Remove the DISPLAY board block
in the direction of the arrow.
3filament tape
(sub material)
Note: Please spread a sheet under a
unit not to injure cabinet top.
– Cabinet top bottom view –
rear side
cabinet top block
left side
right side
front side
colored line
Insert straight into the interior.
flexible flat
cable
connector
OK
colored line
Insert at a slant.
flexible flat
cable
connector
NG
How to install the flexible flat cable
When installing the flexible flat cable, ensure that
the colored line is parallel to the connector after insertion.
)lexible flat cable ))C settinJ
3acNinJC= settinJ
DISPLAY board
DISPLAY board
non woven fabric
(T0.3)
flexible flat cable
(FFC4)
flexible flat cable
(6 core) (FFC4)
flexible flat cable
(18 core) (FFC3)
flexible flat cable
(FFC3)
filament tape
(sub material)
Terminal face is
below side.
Terminal face is
below side.
guide line
fold
packing (CZ2)
DISPLAY board

HT-CT380/CT381
12
2-6. POWER BOARD
3RZHUFRUGVHWWLQJ
wiring stopper
Dress the wiring stopper
toward the arrow direction.
CN901
6POWER board
5two screws
(BV3)
5two screws
(BV3)
1Remove the wire
from the wiring stopper
with cushion (CZ2-A).
3Remove the power cord
from the wiring stopper.
4power cord connector
(CN901)
cabinet (bottom) block
Insert only part way.Insert straight into
the interior.
connector
Insert at a slant.
connector connector connector
connector connector
OK NG NG
+RZWRLQVWDOOWKHFRQQHFWRU
Insert the connector straight into the interior.
There is a possibility that using this unit without
the connector correctly installed will damage it.
:LUHVHWWLQJ
Note 3: Do not pass the wire close to the heat sink.
MAIN board
CN1005 wiring stopper
cushion (CZ2-A) CN3002
CN3005
heat sink
heat sink
2connector (CN1005)
Note 2: Before connect this connector, refer to “CAPACITOR
ELECTRICAL DISCHARGE PROCESSING” on page 4.
&XVKLRQ&=$VHWWLQJ
Note 4: Paste the cushion (CZ2-A) to
screw head and wiring stopper.
wiring stopper
screw head
cushion
(CZ2-A)
Insert only part way.Insert straight into
the interior.
connector
connector
Insert at a slant.
connector connector
connector connector
OK NG NG
+RZWRLQVWDOOWKHSRZHUFRUGFRQQHFWRU
Insert the connector straight into the interior.
There is a possibility that using this unit without
the connector correctly installed will damage it.
Note 1: When the complete POWER board is replaced, refer to “BOND
FIXATION OF ELECTRIC PARTS” on page 6.

HT-CT380/CT381
13
2-7. CONNECTION CABLE WITH SPEAKER (L-CH, R-CH) (SPC1, SPC2)
Insert only part way.Insert straight into
the interior.
connector
Insert at a slant.
connector connector connector
connector connector
OK NG NG
How to install the connector
Insert the connector straight into the interior.
There is a possibility that using this unit without
the connector correctly installed will damage it.
2connector
(CN3002)
2connector
(CN3001)
3connection cable with speaker
(R-ch) (SPC2)
3connection cable
with speaker
(L-ch) (SPC1)
1cushion (CZ2-A)
&RQQHFWLRQFDEOHZLWKVSHDNHU5FK63&VHWWLQJ
Push
Push
Push
CN3001
Vent hole
Note: Do not block the vent hole in the connection cable with
speaker (R-ch) (SPC2).
&RQQHFWLRQFDEOHZLWKVSHDNHU/FK63&VHWWLQJ
Push
Push
Push
Push
CN3002
cushion (CZ2-A)
Push
cabinet (bottom) block

HT-CT380/CT381
14
2-8. KEY BOARD BLOCK
2two screws
(BVTP3 u10)
1connector
(CN1009)
4KEY board block
Insert only part way.Insert straight into
the interior.
connector
Insert at a slant.
connector connector connector
connector connector
OK NG NG
How to install the connector
Insert the connector straight into the interior.
There is a possibility that using this unit without
the connector correctly installed will damage it.
How to install the KEY board block
cabinet (bottom) block
bracket (BTN-CZ2)
screw hole
cabinet (bottom) assy
five buttons
button (CZ2)
3Remove the KEY board block
in the direction of the arrow.
screw hole
Note: Align five buttons into the holes and align bracket (BTN-CZ2)
into two screw holes.

HT-CT380/CT381
15
2-9. BUTTON, KEY BOARD
1three screws
(BVTP2.6)
7KEY board
5connector
(CN701)
4button (CZ2)
3cushion (CZ2-A)
6cushion (CZ2-A)
2bracket (BTN-CZ2)
,QVWDOODWLRQSRVLWLRQRIWKHFXVKLRQ&=$
,QVWDOODWLRQSRVLWLRQRIWKHFXVKLRQ&=$
button (CZ2)
cushion (CZ2-A)
cushion (CZ2-A)
Note 2: Do not press this area during affixing.
Note 1: Align to cover total nine ribs as shown.
KEY board
five tact switches
four ribs five ribs
Insert only part way.Insert straight into
the interior.
connector
Insert at a slant.
connector connector connector
connector connector
OK NG NG
+RZWRLQVWDOOWKHFRQQHFWRU
Insert the connector straight into the interior.
There is a possibility that using this unit without
the connector correctly installed will damage it.

HT-CT380/CT381
16
2-10. RF MODULATOR (RF1)
4screw
(P3 u8)
2cushion (sound)
5Remove the RF modulator block
in the direction of the arrow.
6RF modulator
(RF1)
3flexible flat cable
(24 core) (FFC2)
1connector
(CN1003)
)OH[LEOHIODWFDEOH))&VHWWLQJ
flexible flat cable
(FFC2)
push
cushion
(sound)
RF modulator
(RF1)
terminal face
)OH[LEOHIODWFDEOH))&VHWWLQJ
Terminal face is
below side.
connector
(CN1003)
cabinet (bottom) block
colored line
Insert straight into the interior.
flexible flat
cable
connector
OK
colored line
Insert at a slant.
flexible flat
cable
connector
NG
+RZWRLQVWDOOWKHIOH[LEOHIODWFDEOH
When installing the flexible flat cable, ensure that
the colored line is parallel to the connector after insertion.
Note: When the RF modulator (Ref. No. RF1) is replaced, refer to
“NOTES ON THE WIRELESS CONNECTION (LINK) AFTER
REPAIRS ARE COMPLETE” on page 5.

HT-CT380/CT381
17
Note 2: When the complete MAIN board is replaced, refer to “NOTE
OF REPLACING THE IC3001 ON THE MAIN BOARD AND
THE COMPLETE MAIN BOARD” and “NOTES ON THE
WIRELESS CONNECTION (LINK) AFTER REPAIRS ARE
COMPLETE” on page 5.
2-11. MAIN BOARD
4two screws
(BVTP3 u8)
8five screws
(BV3)
8screw
(BV3)
8screw
(BV3)
qa MAIN board
9wiring stopper
7bracket (FFC-CZ2)
6two screws
(BV3)
1Remove the wire from the wiring stopper
with cushion (CZ2-A).
:LUHVHWWLQJ
3flexible flat cable (14 core)
(FFC1) (CN2001)
0screw
(B3 u5)
0three screws
(B3 u5)
)OH[LEOHIODWFDEOH))&VHWWLQJ
Terminal face is
below side.
connector
(CN2001)
Note 5: Do not pass the wire close to the heat sink.
cabinet (bottom) block
5heat sink (CZ2)
Note 3: When you install the heat sink (CZ2), spread the compound referring
to “NOTE OF REPLACING THE IC3001 ON THE MAIN
BOARD AND THE COMPLETE MAIN BOARD” on page 5.
2connector (CN1005)
Note 4: Before connect this connector, refer to “CAPACITOR
ELECTRICAL DISCHARGE PROCESSING” on page 4.
colored line
Insert straight into the interior.
flexible flat
cable
connector
OK
colored line
Insert at a slant.
flexible flat
cable
connector
NG
+RZWRLQVWDOOWKHIOH[LEOHIODWFDEOH
When installing the flexible flat cable,
ensure that the colored line is parallel
to the connector after insertion.
Note 7: Please use the short screwdriver.
–%RWWRPYLHZ–
&XVKLRQ&=$VHWWLQJ
Note 6: Paste the cushion (CZ2-A) to
screw head and wiring stopper.
MAIN board
CN1005 wiring stopper
wiring stopper
screw head
short screwdriver
cushion
(CZ2-A)
cushion (CZ2-A)
CN3002
CN3005
heat sink
heat sink
Note 1: When removing the MAIN board, you need the full length is
short screwdriver.
If that has not been available a short screwdriver, remove the
MAIN board after removing the chassis (MAIN) block, refer to
“2-14. CHASSIS (MAIN) BLOCK” on page 20.

HT-CT380/CT381
18
2-12. POWER CORD (AC1)
3RZHUFRUGVHWWLQJ
wiring stopper
Dress the wiring stopper
toward the arrow direction.
CN901
&RUGEXVKLQJ)%6VHWWLQJ
1Remove the power cord
from the wiring stopper.
2connector
(CN901)
4Draw out the power cord
from the hole.
7power cord
(AC1)
3Remove the cord bushing (FBS001)
in the direction of the arrow.
6cord bushing
(FBS001)
5claw
3RZHUFRUGVHWWLQJ
power cord
(AC1)
cord bushing
(FBS001)
claw
70 +5, -0 mm
to POWER board
claw Claw is on the lower side.
Note: When installing the power cord (AC1),
check the direction of claw of cord bushing
(FBS001) and install correctly.
cabinet (bottom) block
Insert only part way.Insert straight into
the interior.
connector
connector
Insert at a slant.
connector connector
connector connector
OK NG NG
+RZWRLQVWDOOWKHSRZHUFRUGFRQQHFWRU
Insert the connector straight into the interior.
There is a possibility that using this unit without
the connector correctly installed will damage it.
OK NG

HT-CT380/CT381
19
2-13. BLUETOOTH MODULE (BT1)
1screw
(BVTP2.6)
4bluetooth module
(BT1)
2flexible flat cable (14 core)
(FFC1) 3non woven fabric (T0.3)
bluetooth module
(BT1)
non woven fabric
(T0.3)
guide line
– Bluetooth module rear view –
,QVtallatioQSoVitioQoIthe QoQwoveQIaEriF7
)le[iEle Ilat FaEle ))& VettiQJ
bluetooth module
(BT1)
flexible flat cable
(14 core) (FFC1)
Terminal face is
below side.
colored line
Insert straight into the interior.
flexible flat
cable
connector
OK
colored line
Insert at a slant.
flexible flat
cable
connector
NG
+ow to iQVtall the Ile[iEle Ilat FaEle
When installing the flexible flat cable, ensure that
the colored line is parallel to the connector after insertion.
cabinet (bottom) block

HT-CT380/CT381
20
2-14. CHASSIS (MAIN) BLOCK
3wiring stopper
2screw
(BVTP3 u10)
2eleven screws
(BVTP3 u10)
2four screws
(BVTP3 u10)
5chassis (MAIN) block
cabinet (bottom) block
1flexible flat cable (14 core)
(FFC1) (CN2001)
)OH[LEOHIODWFDEOH))&VHWWLQJ
Terminal face is
below side.
connector
(CN2001)
4Remove the chassis (MAIN) block
in the direction of the arrow.
colored line
Insert straight into the interior.
flexible flat
cable
connector
OK
colored line
Insert at a slant.
flexible flat
cable
connector
NG
+RZWRLQVWDOOWKHIOH[LEOHIODWFDEOH
When installing the flexible flat cable, ensure that
the colored line is parallel to the connector after insertion.