Technical description and composition of the TV SONY KDL-46XBR9, type of panel and applicable modules. The composition of the modules.SONY
Model: KDL-46XBR9
Chassis / Version: EX2M
Panel: LTY460HG02
T-CON: 1-878-791-11
PWM Inverter: 1-878-620-12, 1-878-621-12
Power Supply (PSU): APS-247 (CH) - 1-487-341-11
PWM Power: PWM
MainBoard: 1-879-224-14
Tuner: BTF-CA431T
Control: RM-YD029
Appearance
SONY KDL-46XBR9
General recommendations for repairing TV LCD
The SONY KDL-46XBR9 TV, like many other electronic devices, it is advisable to start repairing by inspecting all external and internal elements. Often, based on certain external signs, it may be possible to draw certain conclusions about the reasons for the failure of certain elements of the circuit even before the necessary measurements are made, which will determine the further algorithm for troubleshooting and localizing the defect. Experienced repairmen are well aware of how ring cracks in soldered terminals look, swollen capacitors, and other causes of problems in electronic devices.
In the absence of any signs of operability, when the SONY KDL-46XBR9 does not turn on and does not signal anything with the control lights on the panel, there is a possibility of a failure of the APS-247 (CH) power supply module - 1-487-341-11 of the TV. Diagnostics and repair of the common power supply should always begin with a check of the mains fuse and the condition of the electrolytic capacitors of the secondary rectifier filters. Defective and swollen capacitors should be replaced with new ones. If the fuse breaks, it is advisable to check for a breakdown, first of all, all the power semiconductor elements of the converter and the diode bridge of the rectifier network, as well as the large electrolytic capacitor of the filter of the rectifier network.
The reasons for the breakdown of the power switch in switching power supplies (IIPS) can be different, for example, a malfunction of semiconductor cells or electrolytic capacitors in the stabilization circuits of the primary circuit, as well as a failure in the operation of the PWM PWM controller chip or breakage of the resistors in its bundle.
If the SONY KDL-46XBR9 TV does not have an image, but there is sound, make sure that the backlight power converter (inverter) is working properly. It is also necessary to check the electrolytic capacitors of the filter of the secondary rectifiers of the BP (power supply) for excessive ESR. It is necessary to take into account that in cases of inverter protection shutdown (in order to be able to diagnose) there is a risk of failure of the inverter power elements and take special care. After carrying out repairs, the protection circuit must be restored for further safe operation of the TV.
Repair of the motherboard 1-879-224-14 must begin with the diagnosis and verification of all linear stabilizers and power converters of its microcircuits. Sometimes it may be necessary to update the software (software) - flashing FLASH or EEPROM.
The BTF-CA431T tuner malfunction is established after checking the software and all supply voltages at its terminals. The data exchange of the tuner with the processor via the I2C bus can be controlled by an oscilloscope.
We recommend the owners of the KDL-46XBR9 TV for repair only to qualified specialists with experience! Self-repair attempts without the appropriate knowledge and skills can lead to serious negative consequences!
The appearance of MainBoard 1-879-224-14 is shown in the figure below:1-879-224-14
The appearance of the power supply
Main features of the device SONY KDL-46XBR9:
Installed matrix (LCD panel) LTY460HG02.
The matrix control uses the Timing Controller (T-CON) 1-878-791-11.
A converter controlled by a PWM controller 1-878-620-12, 1-878-621-12 is used to power the backlight lamps.
The formation of the necessary supply voltages for all nodes of the SONY KDL-46XBR9 TV is carried out by the APS-247 power module, or its analogs using PWM chips.
MainBoard - the main board (motherboard) is a module 1-879-224-14.
The BTF-CA431T tuner provides TV reception and channel tuning.
Information from an alternative source:
SONY KDL-46XBR9 Chassis EX2M
Panel Type (Matrix): LTY460HG02
Motherboard: 1-879-224-14
T-con: 1-878-791-11, D1N BACKLIGHT INVERTER: 1-878-620-12, D2N BACKLIGHT INVERTER: 1-878-621-12, IN: 1-873-862-11
PSU: APS-247 (CH) 1-487-341-11
Remote control: RM-YD029