Sony HT-CT770 User Manual

SERVICE MANUAL
Sony Corporation
Published by Sony Techno Create Corporation
HT-CT770
SA-CT770
SPECIFICATIONS
HT-CT770
SOUND BAR
SA-CT770
ACTIVE SPEAKER SYSTEM
9-893-982-02
2014F33-1
©
2014.06
US Model
Canadian Model
AEP Model
UK Model
Australian Model
Chinese Model
Saudi Arabia Model
Singapore Model
Taiwan Model
Ver. 1.1 2014.06
• All of the units included in the HT-CT770 (SA-CT770/
SA-WCT770) are required to confi rming operation of SA-
CT770. Check in advance that you have all of the units.
COMPONENT MODEL NAME
HT-CT770
Bar Speaker (Active Speaker System) SA-CT770
Subwoofer (Active Subwoofer) SA-WCT770
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 - 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)
Except US model:
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: 105 Watts (per channel at 4 ohms, 1 kHz)
Inputs
HDMI IN 1/2/3*
ANALOG IN
DIGITAL IN (OPT (TV))
* These 3 jacks are identical. Using any of them makes no difference.
Output
HDMI OUT (TV (ARC))
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 profiles
2)
A2DP (Advanced Audio Distribution Profile)
AVRCP 1.3 (Audio Video Remote Control Profile)
Supported Codecs
3)
SBC
4)
, AAC
5)
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
60 mm (2 3/8 in) cone type woofer
20 mm (13/16 in) balance drive tweeter
Rated impedance
4 ohms
General
Power requirements
120 V AC, 60 Hz (US and Canadian models)
220 V - 240 V AC, 50 Hz/60 Hz
(AEP, UK, Australian, Chinese and Singapore models)
110 V - 240 V AC, 50 Hz/60 Hz (Saudi Arabia model)
120 V AC, 50 Hz/60 Hz (Taiwan model)
Power consumption
On: 34 W
Standby mode (Control for HDMI is set to on): 0.5 W or less
Standby mode (Control for HDMI is set to off): 0.3 W or less
BLUETOOTH Standby mode: 0.5 W or less
Dimensions (approx.) (w/h/d)
1030 mm × 50 mm × 113 mm (40 5/8 in × 2 in × 4 1/2 in)
(without wall mountin
g brackets)
1030 mm × 113 mm × 72 mm (40 5/8 in × 4 1/2 in × 2 7/8 in)
(with wall mounting brackets)
Mass (approx.)
2.6 kg (5 Ib 11 3/4 oz)
Speaker system
Wireless Sound Specification version 2.0
Frequency band
2.4 GHz (2.4000 GHz - 2.4835 GHz)
Modulation method
Pi / 4 DQPSK
Digital audio input formats supported by the system
* It is possible to input these formats only with HDMI connection.
Wireless transmitter section
Dolby Digital DTS-HD Master Audio*
Dolby Digital Plus* DTS-HD High Resolution Audio*
Dolby TrueHD* DTS-HD Low Bit Rate*
DTS Linear PCM 2ch 48 kHz or less
DTS 96/24 Linear PCM Maximum 7.1ch 192 kHz or less*
– Continued on next page –

Sony HT-CT770 Specifications

General

Brand	Sony
Model	HT-CT770
Category	Speaker System
Language	English

Summary

SERVICING NOTES

UNLEADED SOLDER

Information on using lead-free solder for board assembly and its characteristics.

CAPACITOR ELECTRICAL DISCHARGE PROCESSING

Procedure for safely discharging capacitors before board inspection to prevent electric shock.

NOTE OF REPLACING THE IC3009 ON THE HDMI BOARD

Guidance on replacing specific ICs on the HDMI board, often requiring board replacement.

NOTE OF REPLACING THE IC1009, IC1010 AND IC1012 ON THE MAIN BOARD

Guidance on replacing specific ICs on the main board, often requiring board replacement.

"PRTECT (PROTECT)" APPEARS ON THE DISPLAY OF THE BAR SPEAKER

Troubleshooting symptom for the 'PROTECT' message on the display, with potential causes.

NOTE OF REPLACING THE IC3001 ON THE MAIN BOARD AND THE COMPLETE MAIN BOARD

Guidance on replacing IC3001 and the main board, including thermal compound application.

DISASSEMBLY

2-1. DISASSEMBLY FLOW

Step-by-step outline of the set's disassembly procedure for service.

2-2. PANEL TOP BLOCK-1

Procedure for disassembling the first part of the top panel assembly.

2-4. LOUDSPEAKER (6 cm) (L-CH, R-CH) (SP1, SP2)

Procedure for removing the left and right channel woofer speaker units.

2-10. MAIN BOARD BLOCK-1

Steps for accessing and disassembling the first part of the main circuit board assembly.

2-12. MAIN BOARD

Detailed steps for removing and handling the main circuit board during disassembly.

2-15. POWER BOARD

Procedure for disassembling and removing the power supply board unit.

2-17. HDMI BOARD

Steps for disassembling and removing the HDMI interface board.

2-19. BLUETOOTH MODULE (BT1)

Procedure for disassembling and removing the Bluetooth wireless communication module.

TEST MODE

Cold Reset

Procedure to initialize system backup information and restore default settings.

Panel Test Mode

Confirms display lighting, LED operation, button functions, and model/version information.

Model Name Display Mode

Enables display of the product's model name on the fluorescent indicator tube.

Tone Test Mode

Confirms test tone output from each speaker for audio diagnostics.

Wireless Sound Test Mode

Displays the subwoofer's µ-com version and tests wireless sound functionality.

TROUBLESHOOTING

"PRTECT" Display Issue

Troubleshooting steps when 'PRTECT' is displayed, indicating a potential protection mode activation.

HDMI Video Not Displaying

Steps to diagnose and resolve issues where HDMI video input is not shown.

No Sound Output

Troubleshooting guide for diagnosing and fixing the problem of no audio output from the system.

Power Not Turning On

Diagnostic steps for when the unit fails to power on, covering potential causes.

DIAGRAMS

BLOCK DIAGRAM - HDMI Section

High-level overview of the HDMI signal path and related components.

BLOCK DIAGRAM - MAIN Section

Block diagram illustrating the main processing and signal flow within the unit.

BLOCK DIAGRAM - AMP Section

Block diagram detailing the audio amplification stage and its connections.

BLOCK DIAGRAM - PANEL/POWER SUPPLY Section

Block diagram showing the panel interface and power supply circuitry.

EXPLODED VIEWS

OVERALL SECTION

Exploded view of the entire unit, showing major assembly sections and components.

TOP PANEL SECTION

Exploded view detailing the disassembly and components of the top panel assembly.

MAIN BOARD SECTION

Exploded view illustrating the main board and its related components for access.

BOTTOM CABINET SECTION

Exploded view showing the disassembly of the bottom cabinet and associated parts.

ELECTRICAL PARTS LIST

CAPACITORS

List of capacitors used in the unit, including part numbers, values, and tolerances.

COILS

List of coils used in the unit, including part numbers and inductance values.

SEMICONDUCTORS

List of semiconductor components like diodes and transistors with part details.

RESISTORS

List of resistors used, including part numbers, resistance values, and power ratings.

ICs

List of integrated circuits used in the unit, with part numbers and function.

CONNECTORS

List of connectors, including part numbers and pin configurations.

DIODES

List of diodes used in the unit, including part numbers and specifications.