J
Jennifer PerezJul 31, 2025
What to do if Sony LCD TV PSU is broken?
- KKristopher BallJul 31, 2025
If the PSU (Power Supply Unit) of your Sony LCD TV is broken, the suggested solution is to replace it.
To Next PageTo Next PageWhat to do if Sony LCD TV PSU is broken?
If the PSU (Power Supply Unit) of your Sony LCD TV is broken, the suggested solution is to replace it.
Initial release of the service manual.
Update adding 49in and 55in models.
Servicing instructions, electrical shock prevention, safe handling guidelines.
Precautions for handling LCD panels during repair, grounding, avoiding damage.
Lithium battery replacement dangers and leakage current testing procedures.
Finding earth ground and information on Lead Free Solder usage.
Guidelines for inserting and pulling out FFCs to avoid damage.
Steps for replacing a tuner module without soldering, including angle and connector checks.
Smart Core Red LED blinking counts indicate specific error causes.
Description of LED patterns for error indication and entry into diagnostic display.
Troubleshooting flowchart for no power issues related to the PSU board.
Visual, info, and broken parts checks for the PSU board.
Troubleshooting flowchart for no power issues on the LD board.
P-on u-com control signal path and troubleshooting for BFX board.
Troubleshooting DC-DC converters and LDOs in no power scenarios.
Troubleshooting and replacement for Muffin2 failures causing no power.
Troubleshooting based on LED blinking codes (2x, 3x, 5x, 6x, 7x).
Troubleshooting steps for no sound issues across various inputs and settings.
Troubleshooting steps for no picture issues, including LED, signal, and board checks.
Pre-checks and troubleshooting for no picture on HDMI ports 1-4.
Troubleshooting for key switch button errors, checking harness and resistors.
Troubleshooting for IR remote and light sensor malfunction.
Flowchart for diagnosing and resolving Ethernet connectivity issues.
Troubleshooting for wireless network and Bluetooth connectivity problems.
Steps to access service mode and understand key behavior.
Checking software version and editing the serial number.
Procedure to select and set the model number in service mode.
Performing White Balance and data transfer adjustments.
Performing HDD performance check and re-registration.
Overview of service mode functions like entering, exiting, and item selection.
Location of main circuit boards for different models.
System architecture block diagram for KF/KFC/KFW models.
Detailed connector pin assignments for KF_43, KF_49, KF_55 models.
Initial release of the service manual.
Update adding 49in and 55in models.
Servicing instructions, electrical shock prevention, safe handling guidelines.
Precautions for handling LCD panels during repair, grounding, avoiding damage.
Lithium battery replacement dangers and leakage current testing procedures.
Finding earth ground and information on Lead Free Solder usage.
Guidelines for inserting and pulling out FFCs to avoid damage.
Steps for replacing a tuner module without soldering, including angle and connector checks.
Smart Core Red LED blinking counts indicate specific error causes.
Description of LED patterns for error indication and entry into diagnostic display.
Troubleshooting flowchart for no power issues related to the PSU board.
Visual, info, and broken parts checks for the PSU board.
Troubleshooting flowchart for no power issues on the LD board.
P-on u-com control signal path and troubleshooting for BFX board.
Troubleshooting DC-DC converters and LDOs in no power scenarios.
Troubleshooting and replacement for Muffin2 failures causing no power.
Troubleshooting based on LED blinking codes (2x, 3x, 5x, 6x, 7x).
Troubleshooting steps for no sound issues across various inputs and settings.
Troubleshooting steps for no picture issues, including LED, signal, and board checks.
Pre-checks and troubleshooting for no picture on HDMI ports 1-4.
Troubleshooting for key switch button errors, checking harness and resistors.
Troubleshooting for IR remote and light sensor malfunction.
Flowchart for diagnosing and resolving Ethernet connectivity issues.
Troubleshooting for wireless network and Bluetooth connectivity problems.
Steps to access service mode and understand key behavior.
Checking software version and editing the serial number.
Procedure to select and set the model number in service mode.
Performing White Balance and data transfer adjustments.
Performing HDD performance check and re-registration.
Overview of service mode functions like entering, exiting, and item selection.
Location of main circuit boards for different models.
System architecture block diagram for KF/KFC/KFW models.
Detailed connector pin assignments for KF_43, KF_49, KF_55 models.
General| Screen Size | 43 inches |
|---|---|
| Resolution | 3840 x 2160 (4K UHD) |
| Display Technology | LCD |
| Smart TV | Yes |
| Operating System | Android TV |
| HDMI Ports | 4 |
| Ethernet Port | Yes |
| HDR Support | HDR10, HLG |
| Audio Output | 20W |
| Wi-Fi | Yes |
| Bluetooth | Yes |
| Backlight Type | Edge LED |
