Technical description and composition of the TV SONY KDL-32RD303, type of panel and applicable modules. The composition of the modules.SONY LED
Model: KDL-32RD303
Panel: 320KSB_S2LV0.3 REV0.0
LED backlight: DIRECT FIJI_32V_B_8LEDs REV1.2 LM41-00091J
LED driver (backlight): integrated into MainBoard
Power Supply (PSU): ACDP-060S01 Adapter 19.5V 3.05A
MainBoard: 1-981-276-11 (173631911)
IC MainBoard: CPU: MEDIATEK
Tuner: DE241TP H5G018B
Technical Specifications KDL-32RD303
SONY KDL-32RD303
General repair guidelines for TV LCD LED
Possible malfunctions
- The SONY KDL-32RD303 TV does not turn on at all. There is no reaction to the remote control and control buttons from the front panel. Indicator lights do not light or flash.
Most often, with such manifestations, the ACDP-060S01 main power module is found to be faulty.
This TV model is equipped with an external power supply unit such as ACDP-060S01 Adapter 19.5V 3.05A, which the owner can purchase independently, and repairing it may not always be advisable, however, sometimes it makes some sense to open it and eliminate simple typical defects typical for IIP. Then it is necessary to measure its output voltages and, in case of their complete or partial absence, it is necessary to check the serviceability of power switches and rectifier diodes of the converters for a possible short circuit.
In case of breakdowns of semiconductors in secondary circuits, the converter can usually work abnormally in the short circuit mode, and during short circuit in the power elements of the primary circuit, the mains fuse often 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, there is sound, it responds to the remote control. Or the image may appear for a second when turned on and immediately disappears.
In some of these cases, the malfunction is caused by a lack of backlighting on the display. The reason for this may be a break in the LED circuit, or a problem in stabilizing their power supply.
To check the LED strips, to open all the transitions of the LEDs, several tens of volts or more are needed, it is best to use a current source for such purposes. The breakage of several PN junctions connected in series cannot be detected with a multimeter or tester. In such cases, it is necessary to open the panel and check each LED. If your multimeter cannot open the LED transitions in forward bias, sometimes you can detect the presence of a PN junction of the protective zener diode by connecting the probes in the opposite direction. If the zener diode is broken or broken in short-circuit, then the LED is faulty and needs to be replaced.
- 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 1-981-276-11 should begin by checking the stabilizers and power converters needed to power the microcircuit and matrix. If necessary, update or replace the software (software).
If you suspect a malfunction of the DE241TP H5G018B tuner, first of all, you need to verify the correctness of the software, as well as the presence of the necessary voltage levels and pulses of data exchange with the processor via the I2C bus at the corresponding terminals of the tuner.
TV users and owners need to remember that attempts to self-repair a SONY KDL-32RD303 TV without the appropriate qualifications and necessary experience can lead to serious negative consequences!
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-32RD303:
Installed matrix (LED panel) 320KSB_S2LV0.3 REV0.0.
A converter is used to power the backlight LEDs, combined with the main board 1-981-276-11.
To power all the internal components of the SONY KDL-32RD303 TV, an external source of the ACDP-060S01 Adapter 19.5V 3.05A type is used.
MainBoard - the main board (motherboard) is a module 1-981-276-11, using CPU chips: MEDIATEK and others.
The DE241TP H5G018B tuner provides television reception and channel tuning.
