REPAIRING / SERVICING TV PHILIPS 40PUS6809

Technical description and composition of the PHILIPS 40PUS6809 TV, panel type and modules used. The composition of the modules.
PHILIPS LED
Model: 40PUS6809 / 60
Chassis / Version: TPM14.2E LA
Panel: V400DK1-KS1
T-CON: V500DK2-CKS2
LED driver (backlight): C390S01E01C
Power Supply (PSU): 715G6661-P01-000-002H
PWM Power: LD7591T, SSC1S311
MOSFET Power: TK15A60U, TK11A65D
MainBoard: 715G6842-M0C-000-005N
IC MainBoard: MT5591IVDJ, 24C128, STA381BW
Tuner: RE231ZN & RE221ZN
Specifications 40PUS6809
PHILIPS 40PUS6809
General recommendations for TV LCD LED repair
Possible manifestations of defects
- PHILIPS 40PUS6809 TV does not turn on, does not respond to the remote control and control panel buttons, does not light or blink indicators.
In such cases, the fault should be looked for first of all in the power module 715G6661-P01-000-002H. Its output voltages should be measured, and in their absence, check the serviceability of the power switches (TK15A60U, TK11A65D) of the converters and rectifier diodes for the probability of a short circuit.
In case of breakdowns in the secondary circuits, the converter can operate in short-circuit mode, and in case of short-circuit in the 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 regulators (PWM) LD7591T, SSC1S311, if they do not have visible damage to the case and an open short circuit between the pins, are usually checked by replacing.
- There is no picture, but there is sound and reaction to commands from the remote control. Or the image appears immediately after switching on and disappears.
The most likely in these cases is a malfunction of the LED backlight. 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.
To identify an open circuit in the LED lines without disassembling the panel, a current source is required. It is impossible to open the junctions connected in series with a simple multimeter; a voltage of several tens of volts is required.
- The TV does not turn on, the indicator signals the standby or operating mode, or blinks.
Repair or diagnostics of the 715G6842-M0C-000-005N motherboard should begin with checking the stabilizers and power converters required to power the microcircuits and matrix. If necessary, you should update or replace the software (software). Complicated repair of MB (SSB) board is in some cases possible and practiced by repairmen. To do this, check and, if necessary, replace elements MT5591IVDJ, 24C128, STA381BW. BGA chip failures are usually easy to detect by warm-up.

 If PHILIPS 40PUS6809 has no picture, but there is sound, often the V400DK1-KS1 display backlight simply does not work. Moreover, in LED TVs, the LEDs inside the panel usually fail, less often the LED driver.
In such cases, you can see a barely noticeable image when the external light hits the screen.
Replacing the LEDs requires disassembling the V400DK1-KS1 LCD panel - a process that requires experience and qualifications from the master. We do not recommend doing such work on your own to the owners of TVs and craftsmen who do not have experience in repairing LCD panels

If there is no image, and the backlight is on, the screen becomes slightly lighter when turned on, and in an open TV you can see light through the holes in the panel case.
In this case, the panel may also be faulty - damage to strips, loops, for example, as a result of moisture ingress after unsuccessful washing of the screen, the T-CON (Timing Controller) board may be faulty. But often the main board MainBoard 715G6842-M0C-000-005N turns out to be faulty, a software failure is also possible.
Then, first of all, you need to check the panel supply voltage, the fuses on the T-CON board, as well as the supply and reference voltages of the column and line drivers - VGH, VGL, Vcom.

If these measurements are within the normal range, it is necessary to trace the passage of LVDS signals from MainBoard 715G6842-M0C-000-005N with an oscilloscope, as well as synchronization signals to loops with drivers.
Flooded or unsuccessfully washed screens of LED TVs can be restored, in about half of the cases, usually if significant damage has not formed in the loops and panel strips.

If there is no reception of television channels, but the TV is working properly from external devices, first of all, you need to check the power supply voltage of the RE231ZN & RE221ZN tuner and update the software. I2C communication pulses must be monitored with an oscilloscope.
Attention to TV owners! Attempts to repair PHILIPS 40PUS6809 on your own are not recommended by the manufacturer and can lead to serious negative consequences!

 

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The appearance of the MainBoard 715G6842-M0C-000-005N is shown in the figure below:

715G6842-M0C-000-005N
The main features of the PHILIPS 40PUS6809 device:
Installed matrix (LED-panel) V400DK1-KS1.
Matrix control uses the V500DK2-CKS2 Timing Controller (T-CON).
The LED driver C390S01E01C is used to power the backlight LEDs.
The formation of the necessary supply voltages for all nodes of the PHILIPS 40PUS6809 TV is carried out by the 715G6661-P01-000-002H power module, or its analogs using LD7591T, SSC1S311 microcircuits and power switches such as TK15A60U, TK11A65D.
MainBoard - the main board (motherboard) is a 715G6842-M0C-000-005N module, using MT5591IVDJ, 24C128, STA381BW and others.
Tuner RE231ZN & RE221ZN provides reception of television programs and tuning to channels.

 PHILIPS 40PUS6809 TV with LCD V400DK1-KS1, diagonal size 40 "(102 cm) 16: 9 format. The required brightness of the screen of 350 cd / m² is provided by LED backlighting. The display technology of the model is implemented with LED backlighting.

There is support for 3D images with active (shutter) separation technology of the right and left channels.
V400DK1-KS1 sensor and MainBoard 715G6842-M0C-000-005N software are capable of realizing images in the highest UHD quality at 3840x2160 4K UHD resolution.
The 40PUS6809 TV is equipped with SMART software and the ability to work on the Internet. The connection to the network can be carried out via Wi-Fi wireless connection. The input high-frequency or video signal can be processed in analog systems PAL, SECAM, NTSC. Graphic processing and digital signal formation occurs in the 480i, 480p, 576i, 576p, 720p, 1080i, 1080p, 2160p standards. Supported media file formats: MP3, WMA, MPEG4, MKV, JPEG.
Speaker power 20 W (2x10 W) is provided by two speakers. Uses NICAM stereo processing system and Sound Surround function.
External interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF), AV, audio x2, component, SCART, RGB, HDMI x4, USB x2, Ethernet (RJ-45), Wi-Fi 802.11n , WiDi, Miracast. A headphone output is provided. To connect a computer or laptop to this TV model, use the VGA (D-Sub 15) connector on the TV case, this interface supports resolutions: 1920x1080, 3840x2160. The digital tuner is capable of receiving television channels in the DVB-T, DVB-T2, DVB-C, DVB-S, DVB-S2 standards.
The TV uses a 715G6661-P01-000-002H power supply.
Dimensions: with stand 901x588x213 mm, without stand 901x528x38 mm.
TV weight: with stand: 11.6 kg, without stand: 10.4 kg.
Attention! The V400DK1-KS1 panel of the PHILIPS 40PUS6809 LED TV is an expensive and unreliable element.
Do not allow any impact on the glass and pressure on the screen surface to avoid damage to the LED panel!
It is also unsafe for liquid to spill onto the screen. Sometimes one drop is enough if it drips down the glass onto the cables to make the TV unrepairable.