REPAIRING / SERVICING TV PHILIPS 55PFL5537T

Technical description and composition of the PHILIPS 55PFL5537T TV, panel type and modules used. The composition of

the modules.
PHILIPS LED
Model: 55PFL5537T / 12
Chassis / Version: Q552.4E LA
Panel: LTA550HW03-001
LED backlight: 9322 292 51682
T-CON: PH_120PSQBC4LV1.0
LED driver (backlight): integrated into PSU
PWM LED driver: DDA010
Power Supply (PSU): DPS-180AP-11A
PWM Power: 2QS02G, DDA009, DDA010
MOSFET Power: STP5NK80ZFP
MainBoard: 313929716961 3139 123 65324-MB / 65334-SB
IC MainBoard: TAS5731, SPARTAN-6, RT8293AH
Tuner: SUT-RE214AN
Specifications 55PFL5537T
PHILIPS 55PFL5537T
General recommendations for TV LCD LED repair
Possible manifestations of malfunctions
- PHILIPS 55PFL5537T does not turn on, front panel LEDs are not lit or blinking. The TV does not respond to the control buttons and the remote control.
In some of these cases, the main switching power supply, the DPS-180AP-11A module, is faulty. Its output voltages should be measured and, in their absence, the serviceability of the power switches (STP5NK80ZFP) and rectifier diodes in the converters should be checked for possible breakdown.
In case of breakdowns of semiconductors in the secondary circuits of any converter, as a rule, it can operate in an emergency mode of short circuit without output voltages, and with a short circuit in the elements of the primary circuit, the mains fuse most often breaks off immediately and, less often, the current sensor in the source of the key.
Breakdown of power switches (MosFet) in switching sources is sometimes caused by malfunctions of other circuit elements, for example, in the circuits supplying the PWM controller, frequency setting or damper, as well as in the circuits of Negative Feedback (OOS) stabilization. PWM controllers (PWM) 2QS02G, DDA009, DDA010, if they do not have visible damage to the case and an outright short circuit between the terminals, are usually checked by replacing.
- There is no picture, there is sound, all other TV functions are working. When turned on, the image may sometimes appear for a second.
A malfunction is usually in these cases most likely in the backlight units of the display matrix. The reason can sometimes be in the power supply of the LEDs, but more often in their malfunction (breakdown or breakage), sometimes in the violation of the contact connections of the LED strips.
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 55PFL5537T has no picture but sound, often the LTA550HW0W's display backlight just doesn't 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 LTA550HW0W 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 313929716961 also 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 313929716961 with an oscilloscope, 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, the indicator signals the standby or operating mode, or blinks.
Repair or diagnostics of the motherboard 313929716961 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). Repair of the board and replacement of TAS5731, SPARTAN-6, RT8293AH microcircuits are carried out if the necessary equipment and the corresponding element base are available. Malfunctions associated with the use of BGA soldering technologies can be localized by the warm-up method.
Before replacing the SUT-RE214AN tuner, if there is no tuning to the channels, you must first check the software and the supply voltage at its outputs. You also need to make sure that the tuner and processor can exchange data via the I2C bus
 

Once again, I remind TV users: you should not try to repair yourself without the appropriate knowledge, experience and the necessary qualifications! Trust the repair to professionals with sufficient experience in the field of electronic repair.

DOWNLOAD SCHEMATIC DIAGRAM  / SERVICE MANUAL   ------------------>    PHILIPS 55PFL5537T/12 Chassis Q552.4E LA for models:26PFL4007H/12, 26PFL4007K/12, 26PFL4007T/12, 32PFL4007H/12, 32PFL4007H/60, 32PFL4007K/12, 32PFL4007M/08, 32PFL4007T/12, 32PFL4007T/60, 32PFL4027H/12, 32PFL4027H/60, 32PFL4027K/12, 32PFL4027T/12, 32PFL4027T/60, 32PFL4037H/12, 32PFL4037H/60, 32PFL4037K/12, 32PFL4037T/12, 32PFL4037T/60, 32PFL4047T/12, 32PFL5007H/12, 32PFL5007H/60, 32PFL5007K/12, 32PFL5007M/08, 32PFL5007T/12, 32PFL5007T/60, 32PFL5507H/12, 32PFL5507H/60, 32PFL5507K/12, 32PFL5507M/08, 32PFL5507T/12, 32PFL5507T/60, 37PFL4007H/12, 37PFL4007K/12, 37PFL4007M/08, 37PFL4007T/12, 37PFL4007T/60, 40PFL5007H/12, 40PFL5007H/60, 40PFL5007K/12, 40PFL5007M/08, 40PFL5007T/12, 40PFL5007T/60, 40PFL5507H/12, 40PFL5507H/60, 40PFL5507K/12, 40PFL5507M/08, 40PFL5507T/12, 40PFL5507T/60, 40PFL5527H/12, 40PFL5527H/60, 40PFL5527K/12, 40PFL5527M/08, 40PFL5527T/12, 40PFL5527T/60, 40PFL5537H/12, 40PFL5537H/60, 40PFL5537K/12, 40PFL5537M/08, 40PFL5537T/12, 40PFL5537T/60, 42PFL4007H/12, 42PFL4007K/12, 42PFL4007M/08, 42PFL4007T/12, 42PFL4007T/60, 42PFL4047T/12, 42PFL4307H/12, 42PFL4307K/12, 42PFL4307T/12, 42PFL4317K/12, 46PFL5007H/12, 46PFL5007K/12, 46PFL5007M/08, 46PFL5007T/12, 46PFL5507H/12, 46PFL5507H/60, 46PFL5507K/12, 46PFL5507M/08, 46PFL5507T/12, 46PFL5507T/60, 46PFL5527H/12, 46PFL5527H/60, 46PFL5527K/12, 46PFL5527M/08, 46PFL5527T/12, 46PFL5527T/60, 46PFL5537H/12, 46PFL5537H/60, 46PFL5537K/12, 46PFL5537M/08, 46PFL5537T/12, 46PFL5537T/60, 47PFL4007H/12, 47PFL4007H/60, 47PFL4007K/12, 47PFL4007M/08, 47PFL4007T/12, 47PFL4007T/60, 47PFL4037T/12, 47PFL4047T/12, 47PFL4307H/12, 47PFL4307K/12, 47PFL4307T/12, 55PFL5507H/12, 55PFL5507H/60, 55PFL5507K/12, 55PFL5507M/08, 55PFL5507T/12, 55PFL5507T/60, 55PFL5527H/12, 55PFL5527K/12, 55PFL5527M/08, 55PFL5527T/12, 55PFL5537H/12, 55PFL5537K/12, 55PFL5537M/08, 55PFL5537T/12.

The appearance of MainBoard 313929716961 is shown in the figure below:
3139 123 65324, 3139 123 65334
313929716961
313929716961 can be used in TVs:
PHILIPS 32PFL4007T/60 (Panel T320HVN01.5 code 408), PHILIPS 32PFL5007T/60 (Panel LTA320HW02 001 code 395), PHILIPS 32PFL5507T/60 (Panel LTA320HW02 code 395 p/n: 932229091682), PHILIPS 40PFL5507T/60 (Panel LTA400HV04 001 code 396 p/n: 932229092682 ), PHILIPS 40PFL5527T/60 (Panel LTA400HV04 001 code 396 p/n: 932229092682), PHILIPS 42PFL4307T/12 (Panel LC420EUE (SE)(F2) code 411 p/n: 932229210682), PHILIPS 46PFL5507T/60 (Panel LTA460HW04 001 code 397), PHILIPS 47PFL4007T/60 (Panel LC470EUE SEM2 code 349 p/n: 932228892682).
The main features of the PHILIPS 55PFL5537T device:
Installed matrix (LED panel) LTA550HW03-001.
Matrix control uses Timing Controller (T-CON) PH_120PSQBC4LV1.0.
To power the backlight LEDs, a converter combined with a power supply is used, controlled by the DDA010 PWM controller.
The formation of the necessary supply voltages for all nodes of the PHILIPS 55PFL5537T TV is carried out by the DPS-180AP-11A power module, or its analogs using 2QS02G, DDA009, DDA010 microcircuits and STP5NK80ZFP power switches.
MainBoard - the main board (motherboard) is a 313929716961 module, using TAS5731, SPARTAN-6, RT8293AH and others.
The SUT-RE214AN tuner provides reception of television programs and tuning to channels.

Additional technical information about the panel:
Brand: SAMSUNG
Model: LTA550HW03-001
Type: a-Si TFT-LCD, Panel
Diagonal size: 55 inch
Resolution: 1920x1080, FHD
Display Mode: SVA, Normally Black, Transmissive
Active Area: 1209.6x680.4 mm
Surface: Antiglare (Haze 2%)
Brightness: 400 cd / m²
Contrast Ratio: 5000: 1
Display Colors: 16.7M / 1.07B (8-bit / 8-bit + Hi-FRC), CIE1931 70%
Response Time: 6 (G to G)
Frequency: 120Hz
Lamp Type: 4 strings WLED Without Driver
Signal Interface: LVDS (4 ch, 8/10-bit), 92 pins
Voltage: 12.0V
PHILIPS 55PFL5537T TV with LCD LTA550HW0W, 55 "(140 cm) 16: 9. 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 the LEDs. The display of the model is realized with LED backlighting.
There is support for 3D images with active (shutter) separation technology of the right and left channels.
The LTA550HW0W sensor and MainBoard 313929716961 software allow viewing of broadcasts and movies in high quality HD at a resolution of 1920x1080 pixels in graphics resolution at 1080p (Full HD).
The 55PFL5537T 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 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 standards.
The power consumed when operating from the mains is 64 W. DPS-180AP-11A power supply.
Dimensions: with stand 1261x793x290 mm, without stand 1261x750x35 mm.
TV weight: with stand: 24.8 kg, without stand: 19.9 kg.
Attention! The LTA550HW0W panel of the PHILIPS 55PFL5537T 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.