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General| Brand | Sony |
|---|---|
| Model | SA-CT381 |
| Type | Soundbar |
| Channels | 2.1 |
| Total Power Output | 300 W |
| Subwoofer | Wireless |
| Bluetooth | Yes |
| HDMI Output(s) | 1 |
| Audio Decoding | Dolby Digital |
| Frequency Response | 20 kHz |
| Inputs | Optical |
Information on handling unleaded solder and its characteristics.
Procedure for discharging capacitors for safety before testing.
How to distinguish models by part number, destination code, and color.
A flowchart illustrating the step-by-step disassembly process for the set.
Procedure for removing the top cabinet block, including flexible flat cable installation.
Instructions for removing and installing the left and right channel loudspeakers.
Steps for installing the NFC module and its flexible flat cable connection.
Procedure for removing and installing the display board and its flexible flat cables.
Guide for installing connectors and setting the power board and its wiring.
Instructions for connecting speaker cables, including connector installation.
Procedure for installing the key board block and its connector.
Steps for installing the cushion and button key board assembly.
Instructions for replacing the RF modulator, including flexible flat cable installation.
Procedure for removing and installing the main board, including heat sink and compound application.
Steps for installing the power cord, including cord bushing and connector settings.
Guide for installing the Bluetooth module and its flexible flat cable.
Procedure for removing the main chassis block and its flexible flat cable.
Illustration showing the set in a service position for easier access.
Procedure to initialize backup information and perform a cold reset.
Overview of test modes accessible via the test mode menu.
Checks display lighting, LED operation, buttons, model name, destination, and software version.
Displays the model name on the fluorescent indicator tube.
Displays the destination code on the fluorescent indicator tube.
Shows the MC (µ-com) version on the fluorescent indicator tube.
Displays the SF (serial flash) version on the fluorescent indicator tube.
Shows the SN (DSP sound number) on the fluorescent indicator tube.
Displays the BT (Bluetooth) module firmware version.
Test mode for amplifier, not used for servicing.
Checks test tone output from each speaker.
Test mode for speakers, not used for servicing.
Display mode for VACS, not used for servicing.
Mode to turn VACS ON/OFF, not used for servicing.
Mode to halt DSP, not used for servicing.
Update mode, not used for servicing.
Test mode for SW distance, not used for servicing.
Mode to read HDCP key, not used for servicing.
Test mode for NFC, not used for servicing.
Test mode for auto standby, not used for servicing.
Displays subwoofer u-com version and creation date.
Initializes subwoofer backup information.
Initializes backup information and performs a cold reset.
Troubleshooting guide for "PRTECT" display errors, checking voltages and circuits.
Troubleshooting steps for when no sound is outputted, checking signal paths and connections.
Steps for troubleshooting when the power does not turn on, checking fuses and voltages.
Guide for troubleshooting HDMI output issues, checking voltages and circuits.
Block diagram illustrating the HDMI signal path and components.
Block diagram of the main section, showing signal paths and component interconnections.
Block diagram of the amplifier section, detailing signal flow and components.
Block diagram for panel and power supply sections, showing control and power flow.
Component layout for the main board (side A), showing component placement.
Component layout for the main board (side B), showing component placement.
Schematic diagram for the main board, section 1 of 6, covering HDMI transceiver.
Schematic diagram for the main board, section 2 of 6, covering audio selectors and DSP.
Schematic diagram for the main board, section 3 of 6, detailing DSP and controller ICs.
Schematic diagram for the main board, section 4 of 6, covering power amplifier ICs.
Schematic diagram for the main board, section 5 of 6, showing system controller and memory.
Schematic diagram for the main board, section 6 of 6, detailing regulators and RF modulator.
Component layout for the display board (component and conductor sides).
Schematic diagram for the display board, showing indicator tube and regulator circuits.
Component layout for the power board, showing component placement.
Schematic diagram for the power board, detailing power supply and control circuits.
Simplified block diagrams for various ICs used in the system.
Exploded view showing the overall assembly of the bottom and top cabinet sections.
Exploded view detailing parts of the top cabinet section, including speakers and NFC module.
Exploded view of the bottom cabinet section, showing main board, RF modulator, and cables.
Exploded view showing the placement of the main board and power board.
List of electrical parts for the display board, including capacitors, transistors, resistors, and connectors.
List of electrical parts for the main board, including capacitors, resistors, and transistors.
List of electrical parts for the main power board, including resistors, capacitors, and transformers.
