REPAIRING / SERVICING TV PHILIPS 55PFL6606K

Technical description and composition of the PHILIPS 55PFL6606K TV, panel type and modules used. The composition of the modules.
PHILIPS LED
Model: 55PFL6606K / 02
Chassis / Version: Q552.2E LA
Panel: LC550EUF-SDA1
LED driver (backlight): integrated into PSU
PWM LED driver: OZ9902GN SOP24
MOSFET LED driver: AOD450
Power Supply (PSU): PLDK-P011A PSL55-2
PWM Power: FA5591 (PFC), L6599, LNK362 (Stb)
MOSFET Power: 11N60 (PFC), STK0160
MainBoard: 313929714851 // 313929711861
IC MainBoard: PNX85537 29F4C08ABADA TPA3120D2
Tuner: TH2603
Specifications 55PFL6606K
PHILIPS 55PFL6606K
General recommendations for TV LCD LED repair
Possible manifestations of defects
- PHILIPS 55PFL6606K TV does not turn on, does not respond to the remote control and control panel buttons, does not light up or blink indicators.
In such cases, the PLDK-P011A power supply usually fails. Then we recommend that you measure its output voltages and, if they are absent, you should check the serviceability of the power switches (11N60 (PFC), STK0160) and the rectifier diodes of the converters for a possible short circuit.
In case of any breakdowns in the secondary circuits, the converter can operate in an emergency mode of a short circuit, and with a short circuit in the power elements of the primary circuit, the mains fuse or the current sensor at the source of the key is often cut 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 FA5591 (PFC), L6599, LNK362 (Stb), 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, there is sound, it reacts to the remote control. Or, immediately after switching on for a second, the image may appear and immediately disappear.
In some of these cases, the malfunction is caused by the lack of display backlighting. 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).
Without a special current source, it is impossible to check the line of series-connected LEDs, and it is unsafe for them to use any voltage sources over 12V for this purpose. Then all that remains is to open the panel and check each LED separately. Usually, Chinese multimeters with 9V power supply lightly light up one 3-volt LED, if you connect the probes to it in the forward direction, the red probe to the anode, the black one to the cathode. For dual 6-volt LEDs, the PN junction of its emergency zener diode can serve as an indicator of the LED health. In the event of a malfunction of the LED, its zener diode will either be cut off or pierced in the K / Z.

If the PHILIPS 55PFL6606K has no picture, but there is sound, the LC550EUF-SDA1 display backlight often 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-SDA1 LCD panel - a process that requires experience and qualifications from the technician. I 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 313929714851 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 313929714851, as well as synchronizing signals to loops with drivers, with an oscilloscope.
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, the indicator signals the standby or operating mode, or blinks.
Repair or diagnostics of the motherboard 313929714851 should begin with checking the stabilizers and power converters necessary 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 PNX85537 29F4C08ABADA TPA3120D2 chips and other possible faulty components. Malfunctions associated with the use of BGA soldering technologies are usually easily diagnosed by the warm-up method.
Before changing the TH2603 tuner, if it is not possible to tune to television channels, you should make sure that there are supply voltages, which must be measured at the corresponding terminals of the tuner and check the software for correctness. The pulses of the data exchange of the tuner with the processor can be monitored with an oscilloscope.

Owners of the 55PFL6606K TV are advised to contact only qualified specialists with the necessary experience for repair! Attempts to repair yourself without the appropriate knowledge and skills can lead to irreversible negative consequences!

 

 DOWNLOAD SCHEMATIC DIAGRAM  / SERVICE MANUAL   ------------------>    PHILIPS 55PFL6606K Chassis Q552.2E LA FOR MODELS:      32HFL5573D/10, 32PFL5806K/02, 32HFL7406D/10, 32PDL7906H/12, 32PDL7906K/02, 32PDL7906M/08, 32PDL7906T/12, 32PFL6606H/12, 32PFL6606H/60, 32PFL6606K/02, 32PFL6606M/08, 32PFL6606T/12, 32PFL6626H/12, 32PFL6626K/02, 32PFL6626M/08, 32PFL6626T/12, 32PFL6636H/12, 32PFL6636K/02, 32PFL6636M/08, 32PFL6636T/12, 32PFL7406H/12, 32PFL7406H/60, 32PFL7406K/02, 32PFL7406M/08, 32PFL7406T/12, 32PFL7476H/12, 32PFL7476K/02, 32PFL7486H/12, 32PFL7486K/02, 32PFL7486M/08, 32PFL7496H/12, 32PFL7496K/02, 32PFL7606H/12, 32PFL7606H/60, 32PFL7606K/02, 32PFL7606M/08, 32PFL7606T/12, 37PFL6606H/12, 37PFL6606H/60, 37PFL6606K/02, 37PFL6606M/08, 37PFL6606T/12, 37PFL7606H/12, 37PFL7606K/02, 37PFL7606M/08, 37PFL7606T/12, 37PFL7666H/12, 37PFL7666K/02, 37PFL7666T/12, 37PFL7676H/12, 37PFL7676K/02, 40HFL5573D/10, 40PFL5806K/02, 40PFL6606H/12, 40PFL6606H/60, 40PFL6606K/02, 40PFL6606M/08, 40PFL6606T/12, 40PFL6626H/12, 40PFL6626K/02, 40PFL6626M/08, 40PFL6626T/12, 40PFL6636H/12, 40PFL6636K/02, 40PFL6636M/08, 40PFL6636T/12, 42HFL7406D/10, 42PDL7906H/12, 42PDL7906K/02, 42PDL7906M/08, 42PDL7906T/12, 42PFL7406H/12, 42PFL7406H/60, 42PFL7406T/12, 42PFL7406K/02, 42PFL7406M/08, 42PFL7456H/12, 42PFL7456K/02, 42PFL7456M/08, 42PFL7486H/12, 42PFL7486K/02, 42PFL7486M/08, 42PFL7606H/12, 42PFL7606H/60, 42PFL7606K/02, 42PFL7606M/08, 42PFL7606T/12, 42PFL7656H/12, 42PFL7656K/02, 42PFL7656M/08, 42PFL7656T/12, 42PFL7666H/12, 42PFL7666H/60, 42PFL7666K/02, 42PFL7666T/12, 42PFL7676H/12, 42PFL7676K/02, 42PFL7676T/12, 42PFL7696H/12, 42PFL7696K/02, 42PFL7696M/08, 42PFL7696T/12, 46HFL5573D/10, 46PFL5806K/02, 46PFL6606H/12, 46PFL6606H/60, 46PFL6606K/02, 46PFL6606M/08, 46PFL6606T/12, 46PFL6626H/12, 46PFL6626K/02, 46PFL6626T/12, 46PFL6806H/12, 46PFL6806H/60, 46PFL6806K/02, 46PFL6806T/12, 47PFL7456H/12, 47PFL7456K/02, 47PFL7606H/12, 47PFL7606H/60, 47PFL7606K/02, 47PFL7606M/08, 47PFL7606T/12, 47PFL7656H/12, 47PFL7656K/02, 47PFL7656M/08, 47PFL7656T/12, 47PFL7666H/12, 47PFL7666K/02, 47PFL7666T/12, 47PFL7696H/12, 47PFL7696K/02, 47PFL7696M/08, 47PFL7696T/12, 55HFL5573D/10, 55PFL6606H/12, 55PFL6606H/60, 55PFL6606K/02, 55PFL6606M/08, 55PFL6606T/12, 55PFL7606H/12, 55PFL7606K/02, 55PFL7606T/12, 55PFL7606T/60.

 

 DOWNLOAD SCHEMATIC DIAGRAM  / SERVICE MANUAL   PSU ------------------>    PLDK-P011A Power supply

 Revision after repair of the backlight. Information from the master.
Decrease the backlight current from 380 mA mA to 270 mA. Removed two 12 Ohm resistors in each channel R455, R455A and R468, R468A.

 

Additional MainBoard Repair
The appearance of MainBoard 313929714851 is shown in the figure below:

313929714851
The main features of the PHILIPS 55PFL6606K device:
Installed matrix (LED panel) LC550EUF-SDA1.
To power the backlight LEDs, a converter combined with a power supply is used, controlled by an OZ9902GN SOP24 PWM controller. The keys of the AOD450 type are used as power elements of the LED driver.
The formation of the necessary supply voltages for all nodes of the PHILIPS 55PFL6606K TV is carried out by the PLDK-P011A power module, or its analogs using FA5591 (PFC), L6599, LNK362 (Stb) microcircuits and 11N60 (PFC), STK0160 power switches.
MainBoard - the main board (motherboard) is a module 313929714851, using PNX85537 29F4C08ABADA TPA3120D2 chips and others.
The TH2603 tuner provides reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: LG Display
Model: LC550EUF-SDA1
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 10%), Hard coating (3H)
Brightness: 450 cd / m²
Contrast Ratio: 1600: 1
Display Colors: 16.7M / 1.06B (8-bit / 8-bit + FRC), 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 55PFL6606K LCD TV 55 "(140 cm) 16: 9. The required brightness of 400 cd / m2 is provided by LED backlighting. This model uses edge LED backlighting. The design and technical capabilities of the TV provide viewing of broadcasts and movies in high quality HD at a resolution of 1920x1080 pixels in graphic resolution at 1080p (Full HD). The 55PFL6606K 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 28 W (2x14 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, VGA, HDMI x3, USB, Ethernet (RJ-45). 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 TV channels in the DVB-T, DVB-C, DVB-S2 standards. The power consumed when operating from the mains is 66 W. Dimensions: with stand 1286x820x295 mm, without stand 1286x756x40 mm. TV weight: with stand: 30 kg, without stand: 26 kg. Attention! The panel of the PHILIPS 55PFL6606K LED TV is an expensive and unreliable element. 

Avoid any impacts 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