REPAIRING / SERVICING TV PHILIPS 55PFL6008S

Technical description and composition of the PHILIPS 55PFL6008S TV, panel type and modules used.

The composition of the modules.
PHILIPS LED
Model: 55PFL6008S / 60
Chassis / Version: QFU1.2E LA
Panel: LTA550HQ25 // LC550EUF-PFF1
LED backlight: LJ64-03329A LTA550HQ19 LJ07-00969A
T-CON: 6870C-0450A
LED driver (backlight): integrated into PSU
PWM LED driver: BD9479FV
Power Supply (PSU): FSP159-4FS01
PWM Power: FSB117H (Standby), FAN7930C (PFC), SSC9522S
MainBoard: 310431366185 310432880861
IC MainBoard: FUSION120, H5TQ2G63BFR, H5TQ2G83BFR, TAS5731P1
Tuner: SUT-RE214AN
Specifications 55PFL6008S
PHILIPS 55PFL6008S
General recommendations for TV LCD LED repair
Possible malfunctions
- PHILIPS 55PFL6008S TV does not turn on, does not respond to the remote control and control panel buttons, the indicators do not light up or flash.
With similar manifestations, a malfunction is most likely found in the FSP159-4FS01 power module. Then you should measure its output voltages and, in case of their complete or partial absence, it is necessary to check the serviceability of the power switches and rectifier diodes of the converters for the presence of a possible short circuit.
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.
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 FSB117H (Standby), FAN7930C (PFC), SSC9522S, 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 image, the screen is black, there is sound, when the screen is illuminated outside, you can sometimes see barely noticeable outlines of the image.
Often in such cases, there is no backlighting of the LED panel. The reason can be found in the malfunction of the LEDs, in the violation of the contact connections of the LED strips, or in the provision of their power supply (LED driver).
To check the health of the LED circuit, it is better to use a current source with a maximum voltage of 200V. We do not recommend using any voltage sources for this purpose. You can check each LED separately with a simple Chinese multimeter (powered by 9 volts) in the P-N transition test mode. If you connect the red probe of the multimeter to the anode of the LED, and the black one to its cathode, then the 3-volt LED will light up slightly, and in the opposite direction you can detect the transition of the emergency zener diode. The serviceability of the PN junction of the Zener diode indirectly indicates the serviceability of the LED-a.

 If PHILIPS 55PFL6008S has no picture, but there is sound, often the LTA550HQ25 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 LTA550HQ25 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 310431366185 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 normal limits, it is necessary to trace the passage of LVDS signals from MainBoard 310431366185 with an oscilloscope, as well as synchronization signals to the 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 indicator on the front panel blinks, the TV does not turn on in operating mode, does not respond to the remote control.
Repair or diagnostics of the motherboard 310431366185 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). In cases of complex MB (SSB) repairs and with the necessary skills and equipment, it may sometimes be necessary to replace its chips FUSION120, H5TQ2G63BFR, H5TQ2G83BFR, TAS5731P1 and other possible faulty components. Malfunctions associated with the use of BGA soldering technologies are usually easily diagnosed by the warm-up method.
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 supply voltage of the SUT-RE214AN tuner and update the software. I2C communication pulses must be monitored with an oscilloscope.
Attention to TV owners! Attempts to repair PHILIPS 55PFL6008S yourself are not recommended by the manufacturer and can lead to serious negative consequences!

 

DOWNLOAD SCHEMATIC DIAGRAM  / SERVICE MANUAL   ------------------>    55PFL6008S/60 Chassis QFU1.2E LA for models: 40PFL8008K/12, 40PFL8008S/12, 40PFL8008S/60, 42PFL6008H/12, 42PFL6008K/12, 42PFL6008S/12, 42PFL6008S/60, 42PFL6158K/12, 42PFL6158S/12, 42PFL6188K/12, 42PFL6188S/12, 42PFL6198K/12, 42PFL6678K/12, 42PFL6678S/12, 42PFL7008H/12, 42PFL7008K/12, 42PFL7008S/12, 42PFL7008S/60, 42PFL7008T/12, 42PFL7108H/12, 42PFL7108K/12, 42PFL7108S/12, 42PFL7108S/60, 42PFL7108T/12, 46PDL8908S/12, 46PDL8908S/60, 46PFL8008K/12, 46PFL8008S/12, 46PFL8008S/60, 46PFL8008S/98, 47PFL6008H/12, 47PFL6008K/12, 47PFL6008S/12, 47PFL6008S/60, 47PFL6158K/12, 47PFL6158S/12, 47PFL6188K/12, 47PFL6188S/12, 47PFL6198K/12, 47PFL6678K/12, 47PFL6678S/12, 47PFL7008H/12, 47PFL7008K/12, 47PFL7008S/12, 47PFL7008S/60, 47PFL7108H/12, 47PFL7108K/12, 47PFL7108S/12, 47PFL7108S/60, 55PDL8908D/78, 55PDL8908S/12, 55PDL8908S/60, 55PDL8908S/98, 55PFL6008H/12, 55PFL6008K/12, 55PFL6008S/12, 55PFL6008S/60, 55PFL6008T/12, 55PFL6158K/12, 55PFL6158S/12, 55PFL6188K/12, 55PFL6188S/12, 55PFL6198K/12, 55PFL6678K/12, 55PFL6678S/12, 55PFL7008H/12, 55PFL7008K/12, 55PFL7008S/12, 55PFL7008S/60, 55PFL7108H/12, 55PFL7108K/12, 55PFL7108S/12, 55PFL7108S/60, 55PFL8008K/12, 55PFL8008S/12, 55PFL8008S/60, 60PFL6008H/12, 60PFL6008K/12, 60PFL6008S/12, 60PFL6008S/60, 60PFL8708S/12, 60PFL8708S/60, 65PFL9708S/12, 65PFL9708S/60, 84PFL9708S/12, 84PFL9708/78.

 

 

The appearance of MainBoard 310431366185 is shown in the figure below:
310431366185
The weak point in the PHILIPS TV models assembled on the QFU1.2E LA chassis is the SSB main board (MainBoard), which usually fails after two years of operation. Its replacement is required.
The cost of the board is quite high, which sometimes raises the question of the expediency of repair.
Despite the efforts of the designers to make it difficult or exclude the possibility of repairing the board, there are still options for its restoration.
Attention to the masters !!! Pay attention to the drops of compound on the bottom of the board. When trying to heat the board or reball BGA chips, the compound must be completely removed. Otherwise, the tracks will close, which will significantly complicate further board repair.
310431366185 can be used in TVs:
PHILIPS 42PFL7008S / 60 (Panel LC420EUF (AF) (F1)), PHILIPS 40PFL8008S / 60 (Panel LTA400HL18 002), PHILIPS 42PFL6008S / 60 (Panel LC420EUF (PF) (F1)), PHILIPS 42PFL7108 (F1)), PHILIPS 42PFL7108 PHILIPS 47PFL6008S / 60 (Panel LC470EUF (PF) (F1) code 430 p / n: 932230114682), PHILIPS 47PFL6008S / 60 (Panel LC470EUF (PF) (F1) code 430 p / n: 932230114682), PHIL7008 47PF 60 LC470EUF PFF1 code 430 932230114682), PHILIPS 60PFL6008S / 60 (Panel LC600EUD FEF2 code 439 p / n: 932230207682), PHILIPS 55PFL8008S / 12 (Panel LTA550HQ25), PHILIPS 55PFL6PS (F1F5) / 12 (Panel LC420EUF (PF) (F1)).
External view of the power supply

The main features of the PHILIPS 55PFL6008S device:
Installed matrix (LED panel) LTA550HQ25 or LC550EUF-PFF1.
Matrix control uses the 6870C-0450A Timing Controller (T-CON).
To power the backlight LEDs, a converter combined with a power supply is used, controlled by a BD9479FV PWM controller.
The formation of the necessary supply voltages for all nodes of the PHILIPS 55PFL6008S TV is carried out by the FSP159-4FS01 power module, or its analogs using FSB117H (Standby), FAN7930C (PFC), SSC9522S microcircuits.
MainBoard - the main board (motherboard) is a 310431366185 module, using the FUSION120, H5TQ2G63BFR, H5TQ2G83BFR, TAS5731P1 and others.
The SUT-RE214AN tuner provides reception of television programs and tuning to channels.

PHILIPS 55PFL6008S TV with LCD LTA550HQ25, 55 "(140 cm) 16: 9 diagonal. The required screen brightness of 400 cd / m² is provided by LED backlighting. Dynamic contrast ratio of 500,000: 1 is achieved by special control of LED operation. The display of the model is realized with LED backlighting.
There is support for 3D images using polarization technology.

The LTA550HQ25 matrix and MainBoard 310431366185 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 55PFL6008S 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 sound system 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), audio x2, component, SCART, RGB, HDMI x4, USB x3, Ethernet (RJ-45), Wi-Fi, 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 power consumed when operating from the network is 48 W. FSP159-4FS01 power supply.
Dimensions: with stand 1235x792x280 mm, without stand 1235x721x33 mm.
TV weight: with stand: 21 kg, without stand: 19 kg.

Attention! The LTA550HQ25 panel of the PHILIPS 55PFL6008S 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.