REPAIRING / SERVICING TV PHILIPS 47PFL7108S

Technical description and composition of the PHILIPS 47PFL7108S TV, panel type and modules used. The composition of the modules.
PHILIPS LED
Model: 47PFL7108S / 60
Chassis / Version: QFU1.2E LA
Panel: LC470EUF (PF) (F1)
LED backlight: 6922L-0071A
LED driver (backlight): integrated into PSU
PWM LED driver: BD9479FV
Power Supply (PSU): FSP140-4FS01 2722 171 90775
PWM Power: FAN7930 (PFC), SSC9522S
MOSFET Power: N-FET TO-220F
MainBoard: 310431366185 310432880941 3104 303 54945 3104 313 66 185
IC MainBoard: FUSION120, H5TQ2G63BFR, H5TQ2G83BFR, SPI Flash: 25P10VP
Tuner: SUT-RE214AN
Specifications 47PFL7108S
PHILIPS 47PFL7108S
General recommendations for TV LCD LED repair
Possible manifestations of malfunctions
- PHILIPS 47PFL7108S TV does not turn on at all. Control lamps do not light up or blink. The TV on the remote control and control panel buttons does not respond.
Most often, with similar manifestations, the main power module FSP140-4FS01 turns out to be faulty. It is then necessary to measure its output voltages and, if they are absent, the power switches (N-FET TO-220F) and the rectifier diodes of the converters should be checked for the probability of a short circuit.
In case of diode breakdowns in the secondary circuits, the converter can operate in an emergency mode of short circuit without output voltages, and in the event of a short circuit in the power elements of the primary circuit, the mains fuse and / or the current sensor in the source of the key 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 FAN7930 (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 picture but there is sound and reaction to the remote control Or, for a second, the image may appear immediately after switching on.
The malfunction in most of such cases is found in the nodes and elements of the LED panel 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.

 If PHILIPS 47PFL7108S has no picture, but there is sound, often the 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 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 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 the MainBoard 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 blinks or is on constantly, the TV does not turn on, 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 some cases, to repair the MB (SSB) board, it may be necessary to replace chips - FUSION120, H5TQ2G63BFR, H5TQ2G83BFR, SPI Flash: 25P10VP with new or known good ones. In cases where BGA technologies are used, defects are usually localized by heating.
The malfunction of the SUT-RE214AN tuner is established after checking the software and all supply voltages at its outputs. The data exchange of the tuner with the processor via the I2C bus can be monitored with an oscilloscope.

Attention! Users and owners of 47PFL7108S TVs who do not have the appropriate qualifications, knowledge and experience are strongly discouraged from trying to repair themselves in order to avoid negative consequences that can lead to the complete non-repairability of the device.

 

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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 42PFL7108S/60 (Panel LC420EUF PFF1), PHILIPS 47PFL6008S/60 (Panel LC470EUF (PF)(F1) code 430 p/n: 932230114682), PHILIPS 47PFL6008S/60 (Panel LC470EUF (PF)(F1) code 430 p/n: 932230114682), PHILIPS 47PFL7008S/60 (Panel LC470EUF PFF1 code 430 932230114682), PHILIPS 60PFL6008S/60 (Panel LC600EUD FEF2 code 439 p/n: 932230207682), PHILIPS 55PFL8008S/12 (Panel LTA550HQ25), PHILIPS 55PFL7108S/60 (Panel LC550EUF (PF)(F1)), PHILIPS 42PFL6678S/12 (Panel LC420EUF (PF)(F1)).

External view of the power supply
The main features of the PHILIPS 47PFL7108S device:

Installed matrix (LED-panel) LC470EUF (PF) (F1).
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 47PFL7108S TV is carried out by the FSP140-4FS01 power module, or its analogs using FAN7930 (PFC), SSC9522S microcircuits and N-FET TO-220F power switches.
MainBoard - the main board (motherboard) is a 310431366185 module, using FUSION120, H5TQ2G63BFR, H5TQ2G83BFR, SPI Flash: 25P10VP and others.
The SUT-RE214AN tuner provides reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: LG Display
Model: LC470EUF-PFF1
Type: a-Si TFT-LCD, Panel
Diagonal size: 47 inch
Resolution: 1920x1080, FHD
Display Mode: S-IPS, Normally Black, Transmissive
Active Area: 1039.68x584.82 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 (4 ch, 8/10-bit), 92 pins
Voltage: 12.0V

PHILIPS 47PFL7108S LCD TV with a diagonal of 47 "(119 cm) in 16: 9 format. The required brightness of the screen 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 model has LED backlighting.
There is support for 3D images using polarization technology.
The design and technical capabilities of the TV provide viewing of broadcasts and films in high quality HD at a resolution of 1920x1080 pixels in graphic resolution at 1080p (Full HD).
The 47PFL7108S 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 24 W (2x12 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. 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 mains is 59 W.
Dimensions: with stand 1064x696x225 mm, without stand 1064x628x32 mm.
TV weight: with stand: 16.6 kg, without stand: 15.1 kg.
Attention! The panel of the PHILIPS 47PFL7108S LED TV is an expensive and unreliable element.