Technical description and composition of the SONY KDL-43WF665 TV, panel type and modules used. The composition of the modules.SONY LED
Model: KDL-43WF665
Chassis / Version: 1-982-629-11
Panel: NS8S430CNO01
LED backlight: L3_PTT_SM_D3_FAP_S7_1_R1.0_RAV_1.0 LM41-00539A
T-CON: HV430FHB-N1K 47-6021155 HV430FHBN1K
LED driver (backlight): 1-982-711-11 (173687811) A2201208A
PWM LED driver: BD9423EFV
MOSFET LED driver: KUS220N10 TO-252
Power Supply (PSU): Adapter AC / DC 19.5V
MainBoard: 1-982-629-11 (173684511) A2199944B
IC MainBoard: CPU: MT5581SSEJ
Tuner: CE251ZP
Control: WiFi: DNUR-SY3 1-458-959-13, IR: 1-981-873-11 (173655711)
Specifications KDL-43WF665
SONY KDL-43WF665
General recommendations for TV LCD LED repair
Possible malfunctions
- SONY KDL-43WF665 does not turn on and does not show any signs of operability at all. Does not blink indicators and does not respond to control buttons.
In such cases, you should start looking for a fault in the adapter power supply circuits.
An external power supply Adapter AC / DC 19.5V is not always subject to repair, especially since the owner can purchase it on his own. But, in some cases, it makes sense to open it and eliminate simple typical defects inherent in converters in pulse sources. Its output voltages should be measured and, in their absence, the serviceability of the power switches and rectifier diodes in the converters should be checked for possible breakdown.
In case of breakdowns in the secondary circuits, the converter, as a rule, can operate in an emergency in the short-circuit mode, and in the event of a short circuit in the power elements of the primary circuit, the mains fuse usually breaks off.
Breakdown of power switches (MosFet) in switching sources is sometimes caused by malfunctions of other circuit elements, for example, in the circuits supplying the PWM controller, frequency setting or damper, as well as in the circuits of Negative Feedback (OOS) stabilization. PWM controllers (PWM), if they do not have visible damage to the case and an outright short circuit between the terminals, are usually checked by replacement.
- There is no image, the screen is black, there is sound, sometimes you can see barely noticeable outlines of the image in the ambient light of the screen.
In such cases, a malfunction of the LED panel backlighting elements is most likely. Often the cause of a malfunction is the lack of current in the LED circuit, for example, their open or short circuit, or a violation of the contact connections of the connectors.
It should be remembered that it is not possible to determine an open circuit in the LED lines without disassembling the panels using a tester or multimeter without an additional device, for example, a current source. To open all PN junctions connected in series at once, a voltage of several tens of volts may be required. Then you need to open the panel and check each LED separately with a multimeter. If the capabilities of your multimeter do not allow opening the LED in the forward direction or dual LEds are used, then the PN transition of the emergency zener diode can indirectly serve as an indicator of serviceability. In the event of a malfunction of the LED-a, the PN-junction of the zener diode will either be cut off or broken into the K / Z.
- The TV does not go into operation, does not respond to the remote control. The indicator on the front panel is on or blinking.
In cases where SONY KDL-43WF665 does not have an image, but there is sound, the display backlight often does not work.
In LED TVs, the LEDs inside the NS8S430CN001 panel are usually faulty, and less often the LED driver.
Without backlighting, sometimes you can see a barely noticeable image with a certain successful hit of external light on the screen.
Replacing the LEDs requires disassembling the NS8S430CN001 panel. We do not recommend such works on their own to TV owners and craftsmen who have no experience in repairing LCD panels, especially at home.
If there is no image, and the backlight is on, the screen becomes slightly lighter when turned on, and on an open TV, the light is visible through the holes in the panel case.
In this case, the T-CON (Timing Controller) board may be faulty, but often the MainBoard 1-982-629-11 is also faulty. A software failure is also possible. The panel may also be faulty - damage to strips, loops, for example, after moisture ingress. In such cases, first of all, it is necessary to check the panel supply voltage at the LVDS connector, the fuses on the T-CON board or panel brackets, as well as the supply and reference voltages for column and line drivers - VGH, VGL, Vcom.
If they are within the normal range, then the oscilloscope must track the passage of LVDS signals from MainBoard 1-982-629-11, as well as synchronizing signals to the loops with drivers.
Flooded LED TV screens can sometimes be restored if no significant damage has formed in the loops and on the panel trims.
Repair or diagnostics of the motherboard 1-982-629-11 should begin with checking the stabilizers and power converters necessary to power the microcircuits and matrix. If necessary, you should update or replace the software (software). Often the MB (SSB) board must be replaced in case of complex malfunctions that are difficult to detect. When trying to repair it, you should check its elements - CPU: MT5581SSEJ and replace the failed chips with new ones. Some malfunctions may be associated with the use of BGA soldering technologies in modern Main Board. Typically, such defects are detected by local heating of the chip.
If there is no reception of TV channels, but the TV is working properly from external devices, first of all, you need to check the power supply voltage of the CE251ZP tuner and update the software. I2C communication pulses must be monitored with an oscilloscope.
Owners and users of the SONY KDL-43WF665 TV should remember that self-repair without special knowledge, skills and qualifications can be fraught with negative consequences that can lead to complete non-repairability of the device!
Additional MainBoard RepairThe appearance of MainBoard 1-982-629-11 is shown in the figure below:
1-982-629-11
Main features of the SONY KDL-43WF665 device:
Installed matrix (LED panel) NS8S430CNO01.
Matrix control uses the HV430FHB-N1K Timing Controller (T-CON).
The LED driver 1-982-711-11 is used to power the backlight LEDs, it is controlled by the PWM controller BD9423EFV. KUS220N10 TO-252 keys are used as power elements of the LED driver.
To power all internal components of the SONY KDL-43WF665 TV, an external adapter AC / DC 19.5V.
MainBoard - the main board (motherboard) is a 1-982-629-11 module, using CPU chips: MT5581SSEJ and others.
Tuner CE251ZP provides reception of television programs and tuning to channels.
Firmware update to v8.582:File sony_tvupdate_2017_8582_enf_auth.zip, version 8.582 from 22.06.2020 (290 409 452 bytes).For models: KDL43WG665, KDL43WG663, KDL50WG665, KDL50WG663, KDL50WF663, KDL43WF663, KDL50WF665, KDL43WF665, KDL50WF660, KDL43WF660.The update file and instructions can be downloaded from the manufacturer's website for the KDL-43WF665 model.
Benefits and improvements:We fixed an issue where subtitles of some TV service providers were displayed incorrectly;Improved overall TV stability.Guides and instructions are also offered for this model:Reference Manual (Web Manual). Published on 04 Apr 2018.User's manual. Published on 28 Nov 2019, size 2.43 MB.Wall-Mount Bracket. Published on 09 Apr 2018, size 34.75 MB.Quick Setup Guide and Quick Start Guide. Published on 04 Apr 2018, size 1.89 MB.
SONY KDL-43WF665 TV with LCD NS8S430CN001, 42.5 "(108 cm) 16: 9 format diagonal. The LCD panel uses Direct LED backlighting.
The NS8S430CN001 sensor and MainBoard 1-982-629-11 software provide viewing of broadcasts and movies in high quality HD at a resolution of 1920x1080 pixels in graphics resolution at 1080p (Full HD). Image processing is performed using modern High Dynamic Range (HDR) technology with an extended range of brightness gradations.
The KDL-43WF665 TV has built-in SMART software and pre-installed Linux operating system. Internet connection can be made via Wi-Fi wireless connection. Video processor supported media file formats: MP3, WMA, MPEG4, HEVC (H.265), Xvid, DivX, MKV, JPEG.
The power of the sound speaker system is 10 W (2x5 W), provided by two speakers. Uses the NICAM stereo signal processing system and the Sound Surround function.
An external interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF), AV, HDMI x2, USB x2, Ethernet (RJ-45), Wi-Fi 802.11n, Miracast. A headphone output is provided.
The digital tuner is capable of receiving television channels in the DVB-T MPEG4, DVB-C, DVB-T2, DVB-S2 standards.
The TV uses an external adapter ACDP-085D01.
Dimensions: with stand 974x628x268 mm, without stand 974x572x68 mm.
TV weight: with stand: 8.2 kg, without stand: 7.8 kg.
Attention! The panel NS8S430CN001 of the SONY KDL-43WF665 LED TV is the most expensive element.
Avoid impacts on the glass and excessive pressure on the screen surface to avoid damage to the LED panel!
It is unsafe for any liquid to spill on the screen. Sometimes one drop of water is enough, if it flows down the glass onto the plumes, the TV may become unrepairable.