Technical description and composition of the TV SONY KDL-46X4500, type of panel and applicable modules. The composition of the modules.SONY LED
Model: KDL-46X4500 E
Chassis / Version: EG1H
Panel: LTY460HE05
LED driver (backlight): DRV46 1-877-267-11 (172993211)
PWM LED driver: CXA3747R
Power Supply (PSU): 1-877-272-11 G7 & G7 & GL
PWM Power: R2A20112, CXD9841P,
MOSFET Power: 2SK3561, 2SK3934
MainBoard: 1-876-560-11 FBA
IC MainBoard: RSS050P03, SAA7115AHL, THC7984-I7, CXB1446R, D61300F1-230, SiL9151CLU
Tuner: AE 1-876-560-11
Technical Specifications KDL-46X4500
SONY KDL-46X4500
General repair guidelines for TV LCD LED
Repair of the SONY KDL-46X4500 E TV should begin with a fault diagnosis, which involves a careful examination of the external and internal elements of the device. Many visible changes in the state of the elements make it possible to determine the further direction of troubleshooting and localization of the defect. Carbonized paint on the upper layer of resistors, electrolytic capacitors of rectifier filters swollen after boiling, cracked soldering at the terminals of heating elements or transformers can often suggest the cause of the defect and possible consequences.
If the TV does not turn on, no indicators on its front panel are lit or blinking. Also, if the TV does not respond to the remote control and buttons, does not make any sounds or any signs of operability when turned on, there is a certain chance that the GL G6 power supply module is defective and needs repair. Sometimes with similar manifestations a problem can only occur in the absence of processor power, which is typical for certain SONY models. When repairing the power supply, it is advisable to start the diagnostics by checking the mains fuse and the electrolytic capacitors of the filters of the converter secondary rectifiers. In the event of a fuse breaking, the reason should be sought in the power semiconductor elements of the pulse converter of the main power supply. First of all, it is necessary to check the diodes of the bridge of the rectifier of the mains voltage and the power switch (s) of the converter.
If a breakdown of the power switch is detected, it should be remembered that in a switching power supply (IIP) it does not fail by itself without any reasons that should be sought by checking other elements of the primary circuit - electrolytic capacitors, a PWM controller, which can only be checked replacement, as well as other semiconductor elements (diodes, transistors, zener diodes).
Sometimes the SONY KDL-46X4500 TV does not have an image, but there is sound, or the image appears and immediately disappears. In this case, there is a high probability of a malfunction of the LTY460HE05 panel backlight LEDs converter, or a break in the LED circuit is possible. In such cases, first of all, it is necessary to verify the serviceability of all the electrolytic capacitors of the filter by supplying the LED driver itself, including in the power supply unit (power supply unit).
In most cases of lack of backlight, it becomes necessary to disassemble the panel in order to check the LEDs, connectors, loops and all contact connections. If one or several LEDs does not work in one line, therefore, they are broken and should be replaced.
When diagnosing, it is necessary to take into account that it is impossible to check the open in the chain of LED lines without disassembling the panels using a tester or multimeter. To open all PN junctions connected in series, a voltage of the order of several tens of volts is required, and ideally, a current source.
When trying to repair the motherboard, you should first check the serviceability of linear stabilizers or power converters of microcircuits and, if necessary, update the software (software).
Remember! Attempts to self-repair by users of the SONY KDL-46X4500 TV without the appropriate qualifications and the necessary experience can lead to serious negative consequences!
Service manual / schematic diagram -------------> Sony KDL-40/46/55X4500 chassis EG1H
The appearance of MainBoard 1-876-560-11 is shown in the figure below:1-876-560-11
The appearance of the power supply
Main features of the device SONY KDL-46X4500:
Installed matrix (LED-panel) LTY460HE05.
To power the backlight LEDs, the DRV46 LED driver is used, it is controlled by the CXA3747R PWM controller.
The necessary supply voltages for all nodes of the SONY KDL-46X4500 TV are generated by the power module 1-877-272-11, or its analogs using microchips R2A20112, CXD9841P, and power switches of the type 2SK3561, 2SK3934.
MainBoard - the main board (motherboard) is a module 1-876-560-11, with the use of RSS050P03, SAA7115AHL, THC7984-I7, CXB1446R, D61300F1-230, SiL9151CLU and other chips.
The tuner AE 1-876-560-11 provides the reception of television programs and tuning to channels.