Technical description and composition of the SONY KDL-40RE353 TV, panel type and applicable modules. The composition of the modules.SONY LED
Model: KDL-40RE353
Chassis / Version: BE3
Panel: NS4S400DND11
LED backlight: LM41-00066F, LM41-00075A
LED driver (backlight): integrated into MainBoard
PWM LED driver: BD9423EFV
Power Supply (PSU): ACDP-060S02 Adapter AC / DC 19V 3.05A
MainBoard: 1-981-276-11 173631911 A2180724A
IC MainBoard: CPU: MEDIATEK MT5565CQVG, DC / DC: D4758GG
Tuner: DE241TP H5G018B
Technical Specifications KDL-40RE353
SONY KDL-40RE353
General repair guidelines for TV LCD LED
Possible manifestations of defects
- The SONY KDL-40RE353 TV does not turn on, does not respond to the remote control and buttons on the control panel, does not light up or blink indicators.
With such manifestations, the ACDP-060S02 power module usually fails.
The TV is equipped with an external power source such as ACDP-060S02 Adapter AC / DC 19V 3.05A. The owners of the TV can check them by replacing them and purchase them in stores, but the ability to open and eliminate typical defects usually does not create difficulties for the master. It is necessary to measure its output voltages, and in case of their absence, check the operability of the power switches of the converters and rectifier diodes for the probability of a short circuit.
In the event of breakdowns in the secondary circuits of the converter, it can usually fail in short circuit mode, and in the event of a short circuit in the power elements of the primary circuit, the mains fuse or current sensor at the source of the key most often breaks.
Mos-Fet power switches, used in switching power supplies, sometimes fail due to a malfunction of any other elements that can put it out of operation in key mode or create an excess of the maximum permissible parameters of the switch. These can be elements supplying the PWM controller, frequency-setting or damping circuits, or negative feedback elements in the stabilization circuit. PWM controllers, in the absence of visible damage or explicit short-circuit between the terminals, are checked by replacing with new ones, or obviously working.
- There is no image, there is sound, all other functions of the TV work. When turned on, the image may sometimes appear for a second.
The most likely in these cases is a malfunction of the LED backlight. Often the cause of the malfunction is the lack of current in the LED circuit, for example, an open or short circuit, or a violation of the contact connections of the connectors.
To check the LED lines for breaks without disassembling the panel, for example, a current source will help. It is impossible to open series-connected PN junctions with a simple multimeter, a voltage of the order of several tens of volts is required.
- The TV does not enter the operating mode, does not respond to the remote control. The indicator on the front panel lights constantly or blinks.
Repair or diagnostics of the motherboard 1-981-276-11 should begin by checking the stabilizers and power converters needed to power the microcircuit and matrix. If necessary, update or replace the software (software). In some cases, to repair the MB board (SSB), it may be necessary to replace the chips - CPU: MEDIATEK MT5565CQVG, DC / DC: D4758GG with new or obviously working ones. In cases where BGA technologies are used, defects are usually localized by the heating method.
In the absence of tuning to the channels of on-air or cable television, you should make sure that the software is correct, as well as in accordance with the ratings of the supply voltage at the terminals of the tuner DE241TP H5G018B. It is also necessary to check the presence of pulses of data exchange between the tuner and the processor via the I2C bus using an oscilloscope.
Once again, we remind TV users: you should not make attempts to repair it yourself without the appropriate knowledge, experience and the necessary qualifications! Entrust repair to professionals with sufficient experience in the field of repair of electronic equipment.
The appearance of MainBoard 1-981-276-11 is shown in the figure below:1-981-276-11
1-981-276-11 can be used in TVs:
SONY KDL-40RD353 (Panel NS4S400DND11), SONY KDL-32RD303 (Panel 320KSB_S2LV0.3 REV0.0), SONY KDL-32RE303 (Panel HV320WHB-N5M).
The appearance of the power supply
Main features of the device SONY KDL-40RE353:
Installed matrix (LED panel) NS4S400DND11.
To power the backlight LEDs, a converter is used, combined with the main board 1-981-276-11, controlled by the BD9423EFV PWM controller.
An external source of the ACDP-060S02 Adapter AC / DC 19V 3.05A type is used to power all internal components of the SONY KDL-40RE353 TV.
MainBoard - the main board (motherboard) is a module 1-981-276-11, using CPU chips: MEDIATEK MT5565CQVG, DC / DC: D4758GG and others.
The DE241TP H5G018B tuner provides television reception and channel tuning.