Sony SA-CT780 User manual

SERVICE MANUAL
Sony Corporation
Published by Sony Techno Create Corporation
HT-CT780
SA-CT780
SPECIFICATIONS
HT-CT780
SOUND BAR
SA-CT780
ACTIVE SPEAKER SYSTEM
9-896-146-02
2015D33-1
© 2015.04
US Model
Canadian Model
AEP Model
UK Model
E Model
Australian Model
Chinese Model
PX Model
Ver. 1.1 2015.04
• All of the units included in
the HT-CT780 (SA-CT780/
SA-WCT780/Remote con-
trol) are required to confirm-
ing operation of SA-CT780.
Check in advance that you
have all of the units.
COMPONENT MODEL NAME
HT-CT780
Bar Speaker (Active Speaker System) SA-CT780
Subwoofer (Active Subwoofer) SA-WCT780
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: 105 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)
Chinese model:
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: 105 Watts (per
channel at 4 ohms, 1 kHz)
Inputs
HDMI IN* 1/2/3
ANALOG IN
DIGITAL IN (TV)
Outputs
HDMI OUT** (ARC)
* The 1 jack supports HDCP 2.2
protocol. HDCP 2.2 is newly enhanced
copyright protection technology that is
used to protect content such as 4K
movies. The 2 and 3 jacks are identical.
Using any of them makes no difference.
** The HDMI OUT jack supports
HDCP 2.2 protocol. HDCP 2.2 is newly
enhanced copyright protection
technology that is used to protect
content such as 4K movies.
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
2-way speaker system,
Acoustic suspension
Speaker
Woofer: 60 mm (2 3/8in)
cone type
Tweeter: 19 mm ( 3/4in)
soft dome type
General
Power requirements
Power consumption
On: 40 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)
Dimensions (approx.) (w/h/d)
1,030 mm × 55 mm × 117 mm (405/8in
× 21/4in × 4 5/8in) (without wall
mounting brackets)
1,030 mm × 120 mm × 74 mm (40 5/8in
× 43/4in × 3 in) (with wall mounting
brackets)
Mass (approx.)
2.8 kg (6 lb 2 3/4oz)
Supplied accessories
Remote control (1)
R03 (size AAA) batteries (2)
Optical digital cable (1)
Wall mounting brackets (2) and screws (2)
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
120 V AC, 60 Hz (US, CND)
120 V AC, 50 Hz/60 Hz (TW)
110 V - 240 V AC, 50 Hz/60 Hz (PX, EA3, BR)
220 V - 240 V AC, 50 Hz/60 Hz (Other models)
Brazilian model:
RMS POWER OUTPUT:
T
he following values were measured at
127 V AC 60 Hz
Front L + Front R:
70 W (35 W per channel × 2, at 4
ohms, 1 kHz, 10% THD*)
* Total harmonic distortion
Photo: SA-CT780
• 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.

HT-CT780
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 HDMILicensing LLCin 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
The 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.
Ver. 1.1

HT-CT780
3
1. SERVICING NOTES ............................................. 4
2. DISASSEMBLY
2-1. Disassembly Flow........................................................... 7
2-2. Top Panel Block.............................................................. 8
2-3. How to Install the Connection Cable with Speaker
(L-ch, R-ch) (SPC1, SPC2)............................................. 9
2-4. Speaker (60 mm) (L-ch, R-ch) (SP1, SP2),
Speaker (19 mm) (L-ch, R-ch) (SP3, SP4) ..................... 10
2-5. NFC Module (NFC1)...................................................... 11
2-6. FL Board ......................................................................... 12
2-7. POWER Board................................................................ 13
2-8. RF Modulator (RF1) ....................................................... 14
2-9. Connection Cable with Speaker (L-ch, R-ch)
(SPC1, SPC2).................................................................. 15
2-10. KEY Board, Key ............................................................. 16
2-11. MAIN Board ................................................................... 17
2-12. Power Cord (AC1).......................................................... 18
2-13. Bluetooth Module (BT1) ................................................ 19
2-14. Bottom Chassis 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 (1/8) -................... 38
5-8. Schematic Diagram - MAIN Section (2/8) -................... 39
5-9. Schematic Diagram - MAIN Section (3/8) -................... 40
5-10. Schematic Diagram - MAIN Section (4/8) -................... 41
5-11. Schematic Diagram - MAIN Section (5/8) -................... 42
5-12. Schematic Diagram - MAIN Section (6/8) -................... 43
5-13. Schematic Diagram - MAIN Section (7/8) -................... 44
5-14. Schematic Diagram - MAIN Section (8/8) -................... 45
5-15. Printed Wiring Board - FL Board - ................................. 46
5-16. Schematic Diagram - FL Board -.................................... 47
5-17. Printed Wiring Board - POWER Board -........................ 48
5-18. Schematic Diagram - POWER Board - .......................... 49
6. EXPLODED VIEWS
6-1. Overall Section ............................................................... 62
6-2. Top Panel Section ........................................................... 63
6-3. Bottom Panel Section...................................................... 64
6-4. MAIN Board Section ...................................................... 65
7. ELECTRICAL PARTS LIST .............................. 66
Accessories are given in the last of the electrical parts list.

HT-CT780
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.
C967
800 :/2 W
800 :/2 W
– POWER Board (Conductor Side) –
(US, Canadian and Taiwan models)
C967
– POWER Board (Conductor Side) –
(Except US, Canadian and Taiwan models)
C914
C915
800 :/2 W
800 :/2 W
The SERVICING NOTES contains important information for servicing. Be sure to read this section before repairing the unit.
MODEL IDENTIFICATION
Distinguish by Part No. on the bottom side of the main unit.
– Bottom view –
MODEL NUMBER LABEL
Part No.
Destination Part No.
US, CND 4-564-208-0[]
AEP 4-564-209-0[]
UK 4-564-209-1[]
EA3 4-564-211-0[]
PX 4-567-467-0[]
SP 4-567-468-0[]
CH 4-567-469-0[]
AUS 4-567-470-0[]
TW 4-567-471-0[]
BR 4-569-640-0[]
E3 4-570-359-0[]
Ver. 1.1

HT-CT780
5
DESTINATION ABBREVIATIONS
The following abbreviations for model destinations are used in this
service manual.
• Abbreviations
AUS : Australian model
BR : Brazilian model
CH : Chinese model
CND : Canadian model
E3 : African and Iranian models
EA3 : Saudi Arabia, UAE, Kuwait, Iraqi, Kenyan, Tanzanian and
Nigerian models
SP : Singapore model
TW : Taiwan model
ADVANCE PREPARATION WHEN CONFIRMING OP-
ERATION
All of the units included in the HT-CT780 (SA-CT780/SA-
WCT780/Remote control) are required to confirming operation of
SA-CT780. 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 IC102, IC104, IC307, IC308,
IC313, IC601 TO IC603, IC605, IC1002, IC1004 AND
IC1501 ON THE MAIN BOARD
IC102, IC104, IC307, IC308, IC313, IC601 to IC603, IC605,
IC1002, IC1004 and IC1501 on the MAIN board cannot replace
with single. When these parts are damaged, replace the complete
mounted board.
NOTE OF REPLACING THE IC503 ON THE MAIN
BOARD AND THE COMPLETE MAIN BOARD
When IC503 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) –
IC503
compound
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.
NOTES ON UPDATE PORT
UPDATE port
This is update dedicated port of this unit.
Use this port only when updating this unit.
– Rear view –
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
• 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.
Ver. 1.1

HT-CT780
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, C903, C905, C914 or C915, C941, C967, C970, C977, C978, C980, C988, D901, F931, LF901, R934, TH901, VDR901
(C978, C980: Except US, Canadian and Taiwan models only)
– POWER Board (Component Side) –
(US, Canadian and Taiwan models)
TH901
C988
C914
D901
A932
C941
R934
C967
C970 F931
C903
C902
C905 VDR901
LF901
– POWER Board (Component Side) –
(Except US, Canadian and Taiwan models)
TH901
C988
C915
D901
A932
C941
R934
C978
C980
C967
C977
C970 F931
C903
C902
C905
VDR901
LF901
C967
C977
C967
C977
C977
– Side view –
– Side view –
Ver. 1.1

HT-CT780
7
SECTION 2
DISASSEMBLY
• This set can be disassembled in the order shown below.
2-1. DISASSEMBLY FLOW
SET
2-14. BOTTOM CHASSIS BLOCK
(Page 20)
2-15. SERVICE POSITION
(Page 21)
2-10. KEY BOARD, KEY
(Page 16)
2-12. POWER CORD (AC1)
(Page 18)
2-13. BLUETOOTH MODULE (BT1)
(Page 19)
2-11. MAIN BOARD
(Page 17)
2-2. TOP PANEL BLOCK
(Page 8)
2-3. HOW TO INSTALL THE CONNECTION
CABLE WITH SPEAKER (L-CH, R-CH)
(SPC1, SPC2)
(Page 9)
2-4. SPEAKER (60 mm) (L-CH, R-CH) (SP1, SP2),
SPEAKER (19 mm) (L-CH, R-CH) (SP3, SP4)
(Page 10)
2-5. NFC MODULE (NFC1)
(Page 11)
2-7. POWER BOARD
(Page 13)
2-6. FL BOARD
(Page 12)
2-9. CONNECTION CABLE WITH SPEAKER
(L-CH, R-CH) (SPC1, SPC2)
(Page 15)
2-8. RF MODULATOR (RF1)
(Page 14)

HT-CT780
8
Note: Follow the disassembly procedure in the numerical order given.
2-2. TOP PANEL BLOCK
• For the speaker cable setting, see page 9.
7 terminal [gray]
(wide side)
6 terminal [black]
(wide side)
6 terminal [gray]
(narrow side)
6 terminal [black]
(narrow side)
6 terminal [blue]
(wide side)
7 terminal [black]
(narrow side)
4 cushion (CZ)
5 cushion top
5 cushion top
4 cushion (CZ)
5 cushion top
5 cushion top
6 terminal [black]
(narrow side)
6 terminal [blue]
(wide side)
6 terminal
[black]
(wide side)
6 terminal [red]
(narrow side)
7 terminal [red]
(wide side)
7 terminal [black]
(narrow side)
4 cushion (CZ)
4 cushion
(CZ)
2Remove the top panel
block in the direction
of the arrow.
1eight screws
(BVTP3 u10)
1nine screws
(BVTP3 u10)
1eight screws
(BVTP3 u10)
– Bottom view –
– Rear view –
3flexible flat cable
(18 core) (FFC3)
(CN104)
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.
Note: Please spread a sheet under a
unit not to injure top panel.
)OH[LEOHIODWFDEOH))&VHWWLQJ
flexible flat cable
(18 core) (FFC3)
connector
(CN104)
Terminal face is
below side.
front
side

HT-CT780
9
2-3. HOW TO INSTALL THE CONNECTION CABLE WITH SPEAKER (L-CH, R-CH) (SPC1, SPC2)
1Connect the terminal
[gray] (wide side).
5Connect the terminal
[black] (narrow side).
6Connect the terminals
[black] and [blue] (wide side).
8Connect the terminals
[gray] and [black] (narrow side).
9Wrap up wire from speaker (19 mm) and
connection cable with speaker (SPC1).
qf Paste the cushion (CZ).
qf Paste the cushion (CZ).
0Pass the cable underneath catcher.
7Wrap up wire from speaker (19 mm) and
connection cable with speaker (SPC1).
2Push the cable
into the slots.
qs Push the cable
into the slot.
3Pass the cable underneath catcher.
qd Pass the cable
underneath catcher.
4Pass the cable along the rib.
qa Pass the cable along the speaker (19 mm).
1Connect the terminal
[red] (wide side).
5Connect the terminal
[black] (narrow side).
6Connect the terminals
[black] and [blue] (wide side).
8Connect the terminals
[gray] and [black] (narrow side).
9Wrap up wire from speaker (19 mm) and
connection cable with speaker (SPC2).
qf Paste the cushion (CZ).
qf Paste the cushion (CZ).
0Pass the cable underneath catcher.
7Wrap up wire from speaker (19 mm) and
connection cable with speaker (SPC2).
2Push the cable
into the slots.
qs Push the cable
into the slot.
3Pass the cable underneath catcher.
qd Pass the cable
underneath catcher.
4Pass the cable along the rib.
qa Pass the cable along the speaker (19 mm).
rear side
front side
left side
left side
right side
right side
top block
bottom block
bottom block
CN501
CN502 Push
Push
Push
Push
Push
Push
Push
Push
Push
Push

HT-CT780
10
2-4. SPEAKER (60 mm) (L-CH, R-CH) (SP1, SP2), SPEAKER (19 mm) (L-CH, R-CH) (SP3, SP4)
2speaker (60 mm)
(R-ch) (SP2) 1four screws
(3.5)
– Top panel block bottom view –
Note: Please spread a sheet under a
unit not to injure top panel.
rear side
top block
front side
left side
right side
6SHDNHUPP5FK63DQG
VSHDNHUPP5FK63setting
speaker (60 mm)
(R-ch) (SP2)
wide terminal side
red line
narrow terminal side
front side
front side
4speaker (19 mm)
(L-ch) (SP3)
3two screws
(3.5)
4speaker (19 mm)
(R-ch) (SP4)
3two screws
(3.5)
2speaker (60 mm)
(L-ch) (SP1)
1four screws
(3.5)
speaker (19 mm)
(R-ch) (SP4)
right side
right side
[black]
[blue]
left side
left side
6SHDNHUPP/FK63DQG
VSHDNHUPP/FK63setting
speaker (60 mm)
(L-ch) (SP1) speaker (19 mm)
(L-ch) (SP3)
wide terminal side red line
narrow terminal side
[black]
[blue]

HT-CT780
11
2-5. NFC MODULE (NFC1)
Note: Please spread a sheet under a
unit not to injure top panel.
– Top panel block bottom view –
– NFC module bottom view –
3Peel off the double
adhesive tape (NFC).
4NFC module
(NFC1)
1cushion (QV, A)
2flexible flat cable
(6 core) (FFC4)
)OH[LEOHIODWFDEOH))&VHWWLQJ
NFC module
(NFC1)
flexible flat cable
(6 core) (FFC4)
Terminal face is
below side.
rear side
front side
top block
guide line
left side
right side
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.
+RZWRLQVWDOOWKHGRXEOHDGKHVLYHWDSH1)&
double adhesive
tape (NFC)
NFC module (NFC1)

HT-CT780
12
2-6. FL BOARD
4cushion (QV, A)
5flexible flat cable
(6 core) (FFC4) (CN804)
3flexible flat cable
(18 core) (FFC3) (CN803)
1screw
(BVTP3 u10) 1two screws
(BVTP3 u10)
1screw
(BVTP3 u10)
6four screws
(BVTP3 u10)
7holder FL
8cushion (CZ)
9FL board
2Remove the FL board block
in the direction of the arrow.
FL board block FL board block
FL board
terminal side
terminal side
cushion (QV, A)
flexible flat cable (6 core) (FFC4) flexible flat cable (18 core) (FFC3)
)OH[LEOHIODWFDEOH))&VHWWLQJ )OH[LEOHIODWFDEOH))&VHWWLQJ +RZWRLQVWDOOWKHFXVKLRQ&=
cushion (CZ)
Note: Please spread a sheet under a
unit not to injure top panel.
–7RSSDQHOEORFNERWWRPYLHZ–
rear side
front side
top block
left side
right side
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.

HT-CT780
13
2-7. POWER BOARD
Insert only part way.Insert straight into
the interior.
connector
connector
Insert at a slant.
connector connector
connector connector
OK NG NG
How to install the power cord connector
Insert the connector straight into the interior.
There is a possibility that using this unit without
the connector correctly installed will damage it.
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.
2power cord connector
(CN901)
4connector
(CN902)
1connector
(CN601)
5POWER board
3four screws
(BV3)
Wire setting
bottom block
boss
CN601
Twist the wire.
CN902boss
Note: When the complete POWER board is replaced, refer to “BOND
FIXATION OF ELECTRIC PARTS” on page 6.

HT-CT780
14
2-8. RF MODULATOR (RF1)
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.
4Remove the RF modulator block
in the direction of the arrow.
3screw
(P3 u8)
7RF modulator
(RF1)
5flexible flat cable
(24 core) (FFC2)
2cushion (CZ)
6cushion (QV, A)
1connector
(CN103)
)OH[LEOHIODWFDEOH))&VHWWLQJ
flexible flat cable
(FFC2)
terminal face
cushion (CZ)
RF modulator
(RF1)
RF modulator
(RF1)
cushion (QV, A)
claw
connector
(CN103)
Terminal face is
below side.
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.
+RZWRLQVWDOOWKHFKVKLRQ49$

HT-CT780
15
2-9. CONNECTION CABLE WITH SPEAKER (L-CH, R-CH) (SPC1, SPC2)
2connector
(CN502)
1connector
(CN105)
2connector
(CN501)
3connection cable with speake
r
(R-ch) (SPC2)
3connection cable
with speaker
(L-ch) (SPC1)
&RQQHFWLRQFDEOHZLWKVSHDNHU/FK63&VHWWLQJ
CN501
CN502
&RQQHFWLRQFDEOHZLWKVSHDNHU5FK63&VHWWLQJ
Push
Push
Push
Push
Push
Push
Push Push
Push
Push
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.
bottom block

HT-CT780
16
2-10. KEY BOARD, KEY
1cushion key top
2two screws
(BVTP3 u10)
4four screws
(BVTP3 u10)
9KEY board
3connector
(CN871)
8key
hole 7cushion key
5bracket key
6cushion (CZ)
,QVWDOODWLRQSRVLWLRQRIWKHFXVKLRQ&=
,QVWDOODWLRQSRVLWLRQRIWKHFXVKLRQNH\WRS
key
cushion key top
bottom block
KEY board
cushion (CZ)
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.
bottom block
boss
–5HDUYLHZ–

HT-CT780
17
2-11. MAIN BOARD
1connector
(CN601)
2flexible flat cable
(14 core) (FFC1)
(CN301)
)OH[LEOHIODWFDEOH))&VHWWLQJ
terminal face
IC503
connector
(CN301)
5two screws
(BVTP3 u10)
6heat sink amp
Note 3: When you install the heat sink amp,
spread the compound referring to “NOTE
OF REPLACING THE IC503 ON THE
MAIN BOARD AND THE COMPLETE
MAIN BOARD” on page 5.
3connector
(CN103)
8three screws
(B3 u5)
8screw
(B3 u5)
7two screws
(BV3)
7five screws
(BV3)
0cushion (CZ)
qa MAIN board
9Remove the MAIN board
in the direction of the arrow.
4flexible flat cable
(24 core) (FFC2)
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.
Note 4: Please use the short screwdriver.
–%RWWRPYLHZ–
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.
short screwdriver
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 bottom chassis block, refer to
“2-14. BOTTOM CHASSIS BLOCK” on page 20.
Note 2: When the complete MAIN board is replaced, refer to “NOTE
OF REPLACING THE IC503 ON THE MAIN BOARD AND
THE COMPLETE MAIN BOARD” and “NOTES ON THE
WIRELESS CONNECTION (LINK) AFTER REPAIRS ARE
COMPLETE” on page 5.

HT-CT780
18
2-12. POWER CORD (AC1)
&RUGEXVKLQJ)%6VHWWLQJ
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.
1connector
(CN901)
3Draw out the power
cord from the hole.
6power cord
(AC1)
2Remove the cord bushing (FBS001)
in the direction of the arrow.
5cord bushing
(FBS001)
4claw
3RZHUFRUGVHWWLQJ
power cord
(AC1)
cord bushing
(FBS001)
claw
80 +5, -0 mm
to POWER board
Note: When installing the power cord (AC1),
check the direction of claw of cord bushing
(FBS001) and install correctly.
bottom block
claw
power cord cord bushing
(FBS001)

HT-CT780
19
2-13. BLUETOOTH MODULE (BT1)
6bluetooth module
(BT1)
4cushion (CZ)
3flexible flat cable (14 core)
(FFC1)
5cushion (QV, A)
)OH[LEOHIODWFDEOH))&VHWWLQJ
bluetooth module
(BT1)
bluetooth module
(BT1)
flexible flat cable
(14 core) (FFC1)
Terminal face is
below side.
Pull out the flexible flat cable
(FFC1) to the front side.
guide line
guide line cushion (CZ)
cushion (QV, A)
,QVWDOODWLRQSRVLWLRQRIWKHFXVKLRQ&=DQGFXVKLRQ49$
2Remove the bluetooth module
block in the direction of the arrow.
1claw
Note: Do not pinch the flexible flat
cable (FFC1) under the
bluetooth module (BT1).
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.
bottom block

HT-CT780
20
2-14. BOTTOM CHASSIS BLOCK
3flexible flat cable
(24 core) (FFC2)
2connector
(CN103)
1cushion (CZ)
4cushion absorbent
bottom panel block
7bottom chassis block
6CZ3 - FFC holder board
5two screws
(BVTP3 u10) 5two screws
(BVTP3 u10)
5eight screws
(BVTP3 u10)
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.
bottom block