Technical description and composition of the SONY KDL-43W805C TV, panel type and applicable modules. The composition of the modules.SONY LED
Model: KDL-43W805C
Chassis / Version: GN1G XM-A
Panel: V430FWME03
LED backlight: LBM430M1403
T-CON: T550HVN08.2 CTRL BD 55T23-C03
LED driver (backlight): 15STM6S-ABC01 Rev1.0
PWM LED driver: BD9397EFV
MOSFET LED driver: STU30N01
Power Supply (PSU): Adapter 19.5V
MainBoard: 1-980-805-31 (173611531)
IC MainBoard: CPU: Cortex-A12 NEON, EMMC: H26M52103FMR
Tuner: CE241ZP
Technical Specifications KDL-43W805C
SONY KDL-43W805C
General repair guidelines for TV LCD LED
Possible manifestations of defects
- SONY KDL-43W805C does not turn on, does not respond to buttons and remote control, indicators on the front panel do not light up and do not blink.
Often in such cases, the Adapter power module is faulty.
The external adapter 19.5V 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, it is necessary to check the serviceability of power switches and rectifier diodes for possible breakdown (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.
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, it reacts to the remote control. Or the image appears when you turn on and immediately disappears
A malfunction is usually most likely in these cases at the backlight nodes of the display matrix. The reason can be found in the malfunction of the LEDs, in the violation of the contact connections of the LED strips, or in the provision of their power (LED driver).
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 TV does not turn on, does not respond to the remote control. The indicator blinks or signals standby mode.
Repair or diagnostics of the motherboard 1-980-805-31 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: Cortex-A12 NEON, EMMC: H26M52103FMR with new or obviously working ones. In cases where BGA technologies are used, defects are usually localized by the heating method.
Before changing the CE241ZP tuner, if it is not possible to tune 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
Attention to users! Self-repair of a SONY KDL-43W805C TV without the appropriate qualifications and the necessary experience can lead to its complete non-repairability!
Service Manual -------------> GN1G CHASSIS Segment: XM-A
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The appearance of MainBoard 1-980-805-31 is shown in the figure below:1-980-805-31
Main features of the device SONY KDL-43W805C:
Installed matrix (LED panel) V430FWME03.
The matrix control uses the Timing Controller (T-CON) T550HVN08.2.
The LED driver 15STM6S-ABC01 is used to power the backlight LEDs, it is controlled by the BD9397EFV PWM controller. As power elements of the LED driver, keys of the STU30N01 type are used.
To power all the internal components of the SONY KDL-43W805C TV, an external adapter type 19.5V is used.
MainBoard - the main board (motherboard) is a module 1-980-805-31, using CPU chips: Cortex-A12 NEON, EMMC: H26M52103FMR and others.
The CE241ZP tuner provides TV reception and channel tuning.