REPAIRING / SERVICING TV PHILIPS 55PFS7309

Technical description and composition of the PHILIPS 55PFS7309 TV, panel type and modules used. The composition of

the modules.
PHILIPS LED
Model: 55PFS7309 / 60
Chassis / Version: TPM14.2E LA
Panel: LC550EUF (PG) (F1)
LED backlight: 6916L-1667A, 6916L-1668A
T-CON: 6970C-0482A V14 TM240 Control_Ver 0.7
LED driver (backlight): integrated into PSU
PWM LED driver: PF7900S, PF7702D
MOSFET LED driver: SM1F03NSFPC
Power Supply (PSU): 715G6385-P01-000-002E
PWM Power: LCS700LG, LD7752B, LD7591T
MOSFET Power: TK18A60V, TK13A65U
MainBoard: 715G6080-M0D-000-005K 705TXESC9
IC MainBoard: MT5591IVDJ, CAT24C128WI, K9F4G08U0D-SIB0, KLM4G1FE3B, STA381BWTR
Tuner: TDSY-G380D & SUT-ZE221ZN
Specifications 55PFS7309
PHILIPS 55PFS7309
General recommendations for TV LCD LED repair
Possible malfunctions
- PHILIPS 55PFS7309 does not turn on, does not respond to buttons and the remote control, indicators on the front panel do not light or blink.
With similar manifestations, a malfunction is most likely to be found in the 715G6385-P01-000-002E power module. It is necessary to make sure that its output voltages are present and, if they are completely absent, check the power switches (TK18A60V, 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 LCS700LG, LD7752B, LD7591T, 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.
Usually, in such cases, there is no backlighting of the LED panel (matrix). 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 test the LED strips, in order to open all the transitions of the LEDs, several tens of volts or more are needed; it is best to use a current source for such purposes. The breakage of several PN junctions connected in series cannot be detected with a multimeter or tester. In such cases, it is necessary to open the panel and check each LED. If your multimeter cannot open the LED junctions in forward bias, you can sometimes detect the presence of a protective zener diode PN junction by connecting the probes in the opposite direction. If the zener diode is cut off or broken in K / Z, then the LED is faulty and needs to be replaced.

 If PHILIPS 55PFS7309 has no picture, but there is sound, often the LCD backlight LC550EUF (PG) (F1) 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 LC550EUF LCD panel - a process that requires experience and qualifications from the technician. 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 715G6080-M0D-000-005K 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 715G6080-M0D-000-005K, 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 715G6080-M0D-000-005K 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). Often the MB (SSB) board needs to be replaced in the event of complex malfunctions that are difficult to detect. When trying to repair, you should check its elements - MT5591IVDJ, CAT24C128WI, K9F4G08U0D-SIB0, KLM4G1FE3B, STA381BWTR and replace the failed chips with new ones. Some malfunctions may be associated with the use of BGA soldering technologies in modern Main Board. Usually, such defects are detected by local heating of the chip.
If you suspect a malfunction of the TDSY-G380D & SUT-ZE221ZN tuner, first of all, you need to make sure the software is correct, as well as the presence of the required supply voltage levels and pulses of data exchange with the processor via the I2C bus on the corresponding tuner pins.

Attention to users! Self-repair of the PHILIPS 55PFS7309 TV without the appropriate qualifications and the necessary experience can lead to its complete non-repairability!

 

DOWNLOAD SCHEMATIC DIAGRAM  / SERVICE MANUAL   ------------------>    PHILIPS 55PFS7309 Chassis TPM14.2E LA for models: 32PFS5709/12, 32PFK5709/12, 32PFK6509/12, 40PFS5709/12, 40PFK5709/12, 40PFK6409/12, 40PFS6409/12, 40PFH6609/88, 40PFK6609/12, 40PFS6609/12, 40PFK6719/12, 40PFS6719/12, 40PUK6809/12, 40PUS6809/12, 40PUS6809/60, 40PFK6909/12, 40PFS6909/12, 40PFK6949/12, 40PFK6959/12, 40PFK6989/12, 42PFK6549/12, 42PFK6559/12, 42PFK6589/12, 42PFS7109/12, 42PFK7109/12, 42PFK7179/12, 42PFK7189/12, 42PFS7189/12, 42PFK7199/12, 42PFS7199/12, 42PFS7309/60, 42PFK7509/12, 42PFS7509/12, 47PFK6549/12, 47PFK6559/12, 47PFK6589/12, 47PFK7109/12, 47PFS7109/12, 47PFK7179/12, 47PFK7189/12, 47PFS7189/12, 47PFK7199/12, 47PFS7199/12, 47PFS7309/60, 47PFK7509/12, 47PFS7509/12, 48PFS5709/12, 48PFK5709/12, 48PFK6409/12, 48PFS6409/12, 48PFK6609/12, 48PFS6609/12, 48PFK6719/12, 48PFS6719/12, 48PFK6909/12, 48PFS6909/12, 48PFK6949/12, 48PFK6959/12, 48PFK6989/12, 50PUK6809/12, 50PUS6809/12, 50PUS6809/60, 55PFS5709/12, 55PFK5709/12, 55PFK6409/12, 55PFS6409/12, 55PFH6609/88, 55PFK6549/12, 55PFK6559/12, 55PFK6589/12, 55PFK6609/12, 55PFS6609/12, 55PFK6909/12, 55PFS6909/12, 55PFK6949/12, 55PFK6959/12, 55PFK6989/12, 55PFK7109/12, 55PFS7109/12, 55PFK7179/12, 55PFK7189/12, 55PFS7189/12, 55PFK7199/12, 55PFS7199/12, 55PFS7309/60, 55PFK7509/12, 55PFS7509/12, 58PUK6809/12, 58PUS6809/12, 58PUS6809/60, 65PFK5909/12, 65PFS5909/12, 65PFS6659/12, 65PFS7559/12.

The appearance of the MainBoard 715G6080-M0D-000-005K is shown in the figure below:

715G6080-M0D-000-005K
External view of the power supply
The main features of the PHILIPS 55PFS7309 device:
Installed matrix (LED panel) LC550EUF (PG) (F1).
Matrix control uses the 6970C-0482A Timing Controller (T-CON).
A converter combined with a power supply is used to power the backlight LEDs, it is controlled by the PF7900S, PF7702D PWM controller. The keys of the SM1F03NSFPC type are used as power elements of the LED driver.
The formation of the necessary supply voltages for all nodes of the PHILIPS 55PFS7309 TV is carried out by the 715G6385-P01-000-002E power module, or its analogs using LCS700LG, LD7752B, LD7591T microcircuits and power switches of the TK18A60V, TK13A65U type.
MainBoard - the main board (motherboard) is a 715G6080-M0D-000-005K module using MT5591IVDJ, CAT24C128WI, K9F4G08U0D-SIB0, KLM4G1FE3B, STA381BWTR and others.
Tuner TDSY-G380D & SUT-ZE221ZN provides reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: LG Display
Model: LC550EUF-PGF1
Type: a-Si TFT-LCD, Panel
Diagonal size: 55 inch

Resolution: 1920x1080, FHD
Display Mode: S-IPS, Normally Black, Transmissive
Active Area: 1209.6x680.4 mm
Surface: Antiglare (Haze 1%), Hard coating (2H)
Brightness: 400 cd / m²
Contrast Ratio: 1400: 1
Display Colors: 16.7M / 1.06B (8-bit / 8-bit + Dithering), CIE1931 72%
Response Time: 5 (G to G); 8 (MPRT)
Frequency: 120Hz
Lamp Type: WLED Without Driver
Signal Interface: LVDS (2 ch, 8/10-bit), 92 pins
Voltage: 12.0V

PHILIPS 55PFS7309 TV with LCD LC550EUF, diagonal size 55 "(140 cm) 16: 9. The required brightness of the screen 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.
The LC550EUF sensor and MainBoard 715G6080-M0D-000-005K software provide viewing of broadcasts and movies in high quality HD at a resolution of 1920x1080 pixels in graphics resolution at 1080p (Full HD).
The 55PFS7309 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. 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 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, 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, DVB-S2 standards.
The TV uses a 715G6385-P01-000-002E power supply.
Dimensions: with stand 1231x772x280 mm, without stand 1231x712x36 mm.
TV weight: with stand: 21 kg, without stand: 19.5 kg.

Attention! Panel LC550EUF (PG) (F1) LED-TV PHILIPS 55PFS7309 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.