Technical description and composition of the TV SONY KDL-40RD353, type of panel and applicable modules. The composition of the modules.SONY LED
Model: KDL-40RD353
Panel: NS4S400DND11
LED driver (backlight): with integrated MainBoard
Power Supply (PSU): ACDP-060S02 Adapter 19V 3.05A
PWM Power: IC_Power
MainBoard: 1-981-276-11 (173631911)
Tuner: DE241TP
Control: RM-ED062, IR: 1-893-522-11 (173510611)
Technical Specifications KDL-40RD353
SONY KDL-40RD353
General repair guidelines for TV LCD LED
Possible manifestations of defects
- The SONY KDL-40RD353 TV does not turn on and does not show any signs of operability. There is no reaction to either the remote control or the control buttons from the front panel.
Most often, with such manifestations, the ACDP-060S02 power module turns out to be faulty.
The external ACDP-060S02 Adapter 19V 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 secondary output voltage, and in case of their absence, check the serviceability of the power switches of the converters and rectifier diodes for a short circuit.
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.
Mos-Fet keys used in switching power supplies usually fail due to a malfunction of other elements that can put it out of operation in key mode or provoke an excess of the maximum current or voltage. It can be supply, damper circuits, or elements of OOS (negative feedback) stabilization. The reason for the breakdown of the power key can be PWM IC_Power. It is checked only by replacement with a known
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-40RD353:
Installed matrix (LED panel) NS4S400DND11.
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-40RD353 TV, an external source of the ACDP-060S02 Adapter 19V 3.05A type is used using IC_Power microcircuits.
MainBoard - the main board (motherboard) is a module 1-981-276-11.
The DE241TP tuner provides TV reception and channel tuning.good one.
- 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.
In most of these cases, a malfunction is detected in the nodes and backlight elements of the LED panel. 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.
To detect a break in the LED lines without disassembling the panel, a current source is required. It is impossible to open transitions connected in series with a simple multimeter; voltage of several tens of volts is necessary.
- The TV does not turn on, the indicator indicates standby or operating mode, 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).
Before replacing the tuner DE241TP, if there is no tuning to the channels, you must first check the software and the supply voltage at its terminals. It is also necessary to make sure that the tuner and processor can exchange data via the I2C bus
Once again, remind users! Attempts to self-repair a TV SONY KDL-40RD353 without the appropriate qualifications and the necessary experience can lead to its complete non-repairability!