Technical description and composition of the SONY KDL-32RE303 TV, panel type and applicable modules. The composition of the modules.SONY LED
Model: KDL-32RE303
Panel: HV320WHB-N5M
LED backlight: 32V_B_8LEDs_REV1.2, 32V_A_3228_8LEDs_REV1.2
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
Control: 1-893-522-11 (173510611)
Technical Specifications KDL-32RE303
SONY KDL-32RE303
General repair guidelines for TV LCD LED
Possible malfunctions
- The SONY KDL-32RE303 TV does not turn on and does not show any signs of operability at all. There is no reaction to the remote control and control buttons from the front panel.
In some of these cases, the main switching power supply, the ACDP-060S01 module, turns out to be faulty.
The external ACDP-060S01 Adapter 19.5V 3.05A power supply is not always subject to repair, especially since the owner can purchase it independently. But, in some cases, it makes sense to open it and eliminate the simple typical defects inherent in converters in pulsed sources. It is necessary to measure the output voltages in its secondary circuits, and if they are completely absent, check the serviceability of power switches and rectifier diodes for a possible breakdown (short circuit).
In case of any breakdown of semiconductors in the secondary circuits, the converter can usually work normally in emergency short circuit mode. There are no output voltages. And during short circuit in the power elements of the primary circuit, as a rule, the mains fuse breaks and less often the current sensor at the source of the key.
Breakdown of power switches (MosFet) in pulsed sources is sometimes caused by malfunctions of other circuit elements, for example, in circuits supplying a PWM controller, frequency-setting or damper ones, as well as in negative feedback (OOS) stabilization circuits. PWM controllers (PWM), if they do not have visible damage to the case and open short circuit between the terminals, are usually checked by replacement.
- There is no image, but there is sound, it reacts to the remote control. Or the image appears when you turn it on and immediately disappears
Often in such cases, there is no LED backlight. The reason for this may be a break in the LED circuit, or a problem in stabilizing their power supply.
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. By opening the panel, each LED can be checked separately. Typically, Chinese multimeters light up a single 3-volt LED, if you connect probes in the forward direction to it. In dual 6-volt LEDs, the PN junction of its emergency zener diode can serve as an indicator of health. In the event of a LED malfunction, its zener diode will either be cut off or broken into short-circuit.
- 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). Board repair and replacement of CPU chips: MEDIATEK are made with the necessary equipment, and the corresponding element base. Faults associated with the application of BGA processor soldering technologies can be localized by the heating method.
If a tuner DE241TP H5G018B is suspected of malfunction, first of all, it is necessary to verify the correctness of the software, as well as the presence of the required voltage levels and data exchange pulses with the processor via the I2C bus on the corresponding tuner pins.
Attention to users! Self-repair of a SONY KDL-32RE303 TV without the appropriate qualifications and the necessary experience can lead to its complete non-repairability!
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-32RE303:
The matrix (LED panel) HV320WHB-N5M is installed.
A converter is used to power the backlight LEDs, combined with the main board 1-981-276-11.
An external source of the ACDP-060S01 Adapter 19.5V 3.05A type is used to power all internal components of the SONY KDL-32RE303 TV.
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.
