Technical description and composition of the TV SONY KDL-43W807C, type of panel and applicable modules. The composition of the modules.SONY LED
Model: KDL-43W807C
Chassis / Version: GN1G XM-A
Panel: V430FWME03
LED backlight: 403-AA-2 (HF) (0)
LED driver (backlight): 15STM6S-ABC02 REV: 1.0
PWM LED driver: BD9397EFV
MOSFET LED driver: STU30N01
Power Supply (PSU): Adapter 19.5V
MainBoard: 1-980-805-31
IC MainBoard: EMMC H26M52103FMR
Tuner: NoName
Technical Specifications KDL-43W807C
SONY KDL-43W807C
General repair guidelines for TV LCD LED
Possible malfunctions
- The SONY KDL-43W807C TV does not turn on at all. The control lights do not light or flash. The TV on the remote control and the control panel buttons do not respond.
With such manifestations, in some 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 its output supply voltage, and in case of their absence, check the serviceability of the power switches of the converters and rectifier diodes for the probability of breakdown in semiconductor PN junctions.
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 with a 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 circuits (OOS) of stabilization. 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, there is sound, it responds to the remote control, the channels are switched. In some cases, the image appears when you turn on and immediately disappears.
In most of these cases, a malfunction is detected in the nodes and backlight elements of the LED panel. 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 on the front panel blinks, the TV does not turn on in the operating mode, it does not respond to the remote control.
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 - EMMC H26M52103FMR with new or obviously working ones. In cases where BGA technologies are used, defects are usually localized by the heating method.
TV users and owners need to remember that attempts to self-repair a SONY KDL-43W807C TV without the appropriate qualifications and necessary experience can lead to serious negative consequences!
Service manual / schematic diagram ---------------------> SONY KDL-43W807C Chassis GN1G XM-A
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-43W807C:
Installed matrix (LED panel) V430FWME03.
The LED driver 15STM6S-ABC02 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-43W807C TV, an external adapter type 19.5V is used.
MainBoard - the main board (motherboard) is a module 1-980-805-31, using EMMC H26M52103FMR chips and others.
The NoName tuner provides television reception and channel tuning.