REPAIRING AND NOT THROWING AWAY

REPAIRING AND NOT THROWING AWAY

Richtige Fernseher haben Röhren!

Richtige Fernseher haben Röhren!

In Brief: On this site you will find pictures and technical information about Service Modes, Circuit Diagrams, Firmware Update procedure, Disassemble procedure, Universal remote control set-up codes, Troubleshooting and more....

If you go into the profession, you will obtain or have access to a variety of tech tips databases HERE IT IS Master Electronics Repair !.

These are an excellent investment where the saying: 'time-is-money' rules. However, to learn, you need to develop a general troubleshooting approach - a logical, methodical, method of narrowing down the problem. A tech tip database might suggest: 'Replace C536' for a particular symptom. This is good advice for a specific problem on one model. However, what you really want to understand is why C536 was the cause and how to pinpoint the culprit in general even if you don't have a service manual or schematic and your tech tip database doesn't have an entry for your sick TV or VCR.

While schematics are nice, you won't always have them or be able to justify the purchase for a one-of repair. Therefore, in many cases, some reverse engineering will be necessary. The time will be well spent since even if you don't see another instance of the same model in your entire lifetime, you will have learned something in the process that can be applied to other equipment problems.
As always, when you get stuck, checking out a tech-tips database may quickly identify your problem and solution.In that case, you can greatly simplify your troubleshooting or at least confirm a diagnosis before ordering parts.

Happy repairing!
Today, the West is headed for the abyss. For the ultimate fate of our disposable society is for that society itself to be disposed of. And this will happen sooner, rather than later.

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..............The bitterness of poor quality is remembered long after the sweetness of todays funny gadgets low price has faded from memory........ . . . . . .....
Don't forget the past, the end of the world is upon us! Pretty soon it will all turn to dust!

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Saturday 10 October 2020

REPAIRING / SERVICING TV PHILIPS 55PFT6569


Technical description and composition of the PHILIPS 55PFT6569 TV, panel type and modules used. The composition of the modules.
PHILIPS LED
Model: 55PFT6569 / 60
Chassis / Version: TPM14.1E LA
Panel: TPT550J1-DUJSGK
LED backlight: IC-D-TBAC55D275R, IC-D-TBAC55D275L
T-CON: 6870C-0471D
LED driver (backlight): integrated into PSU
PWM LED driver: LD7890GS
MOSFET LED driver: P3710BTF
Power Supply (PSU): 715G6405-P01-000-002E
PWM Power: LD7591T (PFC), LD7752B, LCS701LG
MOSFET Power: TK16A60W (PFC), TK13A65U
MainBoard: 715G6165-M0G-000-005X WK: 1343
IC MainBoard: CPU: MT5580, EEPROM: AT24C128, eMMC: P95L-4KA1-JW963
Tuner: TDSY-G720D
Control: WI-FI: 8WUSN24V.2A1G
Specifications 55PFT6569
PHILIPS 55PFT6569
General recommendations for TV LCD LED repair
Possible manifestations of defects
- PHILIPS 55PFT6569 does not turn on, does not respond to buttons and the remote control, indicators on the front panel do not light up or flash.
With such manifestations, the power module 715G6405-P01-000-002E usually fails. It is necessary to make sure that its output voltages are present and, if they are completely absent, check the power switches (TK16A60W (PFC), TK13A65U) and rectifier diodes for a possible 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.
Mos-Fet power switches used in switching power supplies sometimes fail due to a malfunction of any other elements that can disable it in the key mode, or create an excess of the maximum permissible key parameters. These can be elements supplying a PWM regulator, frequency setting or damper circuits, or elements of negative feedback in the stabilization circuit. PWM controllers LD7591T (PFC), LD7752B, LCS701LG, in the absence of visible damage or outright short circuits between the terminals, are checked by replacing them with new ones, or known to be working properly.
- 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.
As a rule, in such cases there is no display backlight. Often the reason is a malfunction of the LEDs (open circuit, short circuit ...), or the connectors of the strips (strings), less often the LED driver turns out to be faulty.
To check the LED strips for breakage without disassembling the panel, for example, a current source will help. It is impossible to open series-connected PN junctions with a simple multimeter; a voltage of the order of several tens of volts is required.

 If PHILIPS 55PFT6569 has no picture, but there is sound, often the TPT550J1-DUJSGK 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 with a successful hit of external light on the screen.
Replacing the LEDs requires disassembling the TPT550J1-DUJSGK 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 the 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 715G6165-M0G-000-005X 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 use an oscilloscope to trace the passage of LVDS signals from MainBoard 715G6165-M0G-000-005X, as well as synchronizing 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.


- The TV does not turn on, does not respond to the remote control. The indicator blinks or signals the standby mode.
Repair or diagnostics of the 715G6165-M0G-000-005X 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). Repair of the board and replacement of chips CPU: MT5580, EEPROM: AT24C128, eMMC: P95L-4KA1-JW963 are made with the necessary equipment and the corresponding element base. Malfunctions associated with the use of BGA soldering technologies can be localized by the warm-up method.
If there is no tuning for terrestrial or cable TV channels, you should make sure that the software is correct, as well as that the supply voltages on the terminals of the TDSY-G720D tuner match. It is also necessary to check with an oscilloscope the presence of pulses of data exchange between the tuner and the processor via the I2C bus.


Attention to TV owners! Attempts to repair PHILIPS 55PFT6569 yourself are not recommended by the manufacturer and can lead to serious negative consequences!

 

DOWNLOAD SCHEMATIC DIAGRAM  / SERVICE MANUAL   ------------------>    PHILIPS 55PFT6569/60 Chassis TPM14.1E LA for models:   24PHK5619/12, 24PHT5619/12, 32PHH4509/88, 32PHK4509/12, 32PHT4509/12, 32PHT4509/60, 32PFH5509/88, 32PFK5509/12, 32PFT5509/12, 32PFT6549/60, 32PFT6559/60, 40PFH4509/88, 40PFK4509/12, 40PFT4509/12, 40PFT4509/60, 40PFH5509/88, 40PFK5509/12, 40PFT5509/12, 42PFH5609/88, 42PFK5609/12, 42PFT5609/12, 42PFT5609/60, 42PFH6109/88, 42PFK6109/12, 42PFT6109/12, 42PFH6309/88, 42PFK6309/12, 42PFT6309/12, 42PFT6309/60, 42PFT6569/60, 47PFH5609/88, 47PFT5609/12, 47PFT5609/60, 47PFH6109/88, 47PFK6109/12, 47PFT6109/12, 47PFH6309/88, 47PFK6309/12, 47PFT6309/12, 47PFT6309/60, 47PFT6569/60, 48PFH5509/88, 48PFK5509/12, 48PFT5509/12, 50PFH4509/88, 50PFK4509/12, 50PFT4509/12, 55PFH5509/88, 55PFK5509/12, 55PFT5509/12, 55PFH5609/88, 55PFT5609/12, 55PFH6109/88, 55PFK6109/12, 55PFT6109/12, 55PFH6309/88, 55PFK6309/12, 55PFT6309/12, 55PFT6569/60.


The appearance of the MainBoard 715G6165-M0G-000-005X is shown in the figure below:



715G6165-M0G-000-005X
The main features of the PHILIPS 55PFT6569 device:
Installed matrix (LED panel) TPT550J1-DUJSGK.
Matrix control uses a Timing Controller (T-CON) 6870C-0471D.
A converter combined with a power supply is used to power the backlight LEDs, and is controlled by the LD7890GS PWM controller. The keys of the P3710BTF type are used as power elements of the LED driver.
The formation of the necessary supply voltages for all nodes of the PHILIPS 55PFT6569 TV is carried out by the 715G6405-P01-000-002E power module, or its analogs using LD7591T (PFC), LD7752B, LCS701LG microcircuits and power switches of the TK16A60W (PFC), TK13A65U type.
MainBoard - the main board (motherboard) is a 715G6165-M0G-000-005X module, using CPU: MT5580, EEPROM: AT24C128, eMMC: P95L-4KA1-JW963 and others.


The TDSY-G720D tuner provides reception of television programs and tuning to channels.


 


PHILIPS 55PFT6569 TV with LCD TPT550J1-DUJSGK, 55 "(140 cm) in 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 using polarization technology.
TPT550J1-DUJSGK sensor and MainBoard 715G6165-M0G-000-005X software provide viewing of broadcasts and movies in high quality HD at a resolution of 1920x1080 pixels in graphics resolution at 1080p (Full HD).
55PFT6569 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 formation of a digital signal occurs in the standards 480i, 480p, 576i, 576p, 720p, 1080i, 1080p. Supported media file formats: MP3, WMA, MPEG4, MKV, JPEG.
Speaker power 22 W (2x11 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 x3, 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, a VGA (D-Sub 15) connector on the TV case is used, this interface supports resolutions: 640x480, 800x600, 1024x768, 1280x1024, 1360x768, 1920x1080.
The digital tuner is capable of receiving television channels in the DVB-T MPEG4, DVB-C, DVB-T2 standards.
The TV uses a 715G6405-P01-000-002E power supply.
Dimensions: with stand 1231x774x280 mm, without stand 1231x718x54 mm.
TV weight: with stand: 18.9 kg, without stand: 17.4 kg.
Attention! Panel TPT550J1-DUJSGK LED-TV PHILIPS 55PFT6569 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.

Posted By: FRANK at 06:48
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