Technical description and composition of the TV SONY KDL-43WD753, type of panel and applicable modules. The composition of the modules.SONY LED
Model: KDL-43WD753
Chassis / Version: 1-980-335-23
Panel: T430HVF03.0
LED backlight: 7443T08.002-2-DX1 LB43012
T-CON: T430HVN01.9 CTRL 43T01 C0A
LED driver (backlight): integrated into MainBoard
Power Supply (PSU): ACDP-060S03 Adapter 19.5V
MainBoard: 1-980-335-23
IC MainBoard: CPU: MT5566CQVT
Tuner: CE251ZP
Control: Remote: RM-ED062, WiFi: 1-458-900-11 (J20H090.00), IR: K48G-172A 1-980-526-11
Technical Specifications KDL-43WD753
SONY KDL-43WD753
General repair guidelines for TV LCD LED
Possible malfunctions
- SONY KDL-43WD753 does not turn on, the indicators on the front panel do not light up and do not blink. The TV does not respond to the control buttons and the remote control.
In such cases, the fault should be sought first in the Adapter power module.
The owner of the TV can purchase an external power supply unit such as Adapter and repairing it is not always advisable. In any case, the simplest typical defects characteristic of most IIP schemes can be easily detected and eliminated after opening. It is necessary to measure its output voltages and, if they are absent, to check for short-circuit probabilities in the converters, power switches and rectifier diodes.
In case of breakdowns in the secondary circuits, the converter can operate in a short circuit mode, and during a short circuit in the elements of the primary circuit, the mains fuse usually breaks.
The breakdown of Mos-Fet keys used in pulsed sources is often caused by malfunctions of other elements, for example, in the power supply circuit of a PWM controller, in frequency-setting or damping circuits, as well as in Negative Stabilization Feedback. PWM microcircuits are usually checked by replacement with new ones, or obviously working.
- There is no image, but there is sound and reaction to commands from the remote control. Or the image appears immediately after turning on and disappears.
As a rule, in such cases there is no display backlight. The reason can be both in the power supply of the LEDs, in their serviceability (breakdown or breakage), as well as in the violation of the contact connections of the LED strips.
When trying to identify a break in the LED lines, it should be borne in mind that it is difficult to do this without disassembling the panel. For example, a current source is needed to open PN junctions connected in series.
- The indicator blinks or lights constantly, the TV does not turn on, does not respond to the remote control.
Repair or diagnostics of the motherboard 1-980-335-23 should begin by checking the stabilizers and power converters needed to power the microcircuit and matrix. If necessary, update or replace the software (software). Sophisticated MB board repair (SSB) is in some cases possible and practiced by repairmen. To do this, check and, if necessary, replace the CPU elements: MT5566CQVT. BGA chip malfunctions are usually easy to detect by warming up.
Before changing the CE251ZP tuner, if there is no possibility of tuning to television channels, make sure that there are supply voltages that must be measured at the corresponding tuner pins and check the software for correctness. The pulses of the data exchange of the tuner with the processor can be controlled by an oscilloscope
TV users and owners need to remember that attempts to self-repair a SONY KDL-43WD753 TV without the appropriate qualifications and necessary experience can lead to serious negative consequences!
The appearance of MainBoard 1-980-335-23 is shown in the figure below:1-980-335-23
The appearance of the power supply
Main features of the device SONY KDL-43WD753:
The matrix (LED panel) T430HVF03.0 is installed.
The matrix control uses the Timing Controller (T-CON) T430HVN01.9.
To power the backlight LEDs, a converter is used, combined with the main board 1-980-335-23.
To power all the internal components of the SONY KDL-43WD753 TV, an external source such as ACDP-060S03 Adapter 19.5V is used.
MainBoard - the main board (motherboard) is a module 1-980-335-23, using CPU chips: MT5566CQVT and others.
The CE251ZP tuner provides TV reception and channel tuning.
