Technical description and composition of the PHILIPS 55PFL8007T TV, type of panel and applicable modules. The composition of the modules.PHILIPS LED
Model: 55PFL8007T / 12
Chassis / Version: QFU1.1E LA
Panel: LTA550HQ19 code 325 p / n: 932229486682
LED backlight: LJ64-03329A
LED driver (backlight): integrated into PSU; 57.6V 960mA
PWM LED driver: OZ9909TN, LM358G
Power Supply (PSU): FSP197-4FS01 - 272217190676
PWM Power: FAN7930 (PFC), FSB127H (Standby), SSC9522S (PWM resonant)
MainBoard: 310431365554 3104 313 65554A 310432869193, 310432869192
IC MainBoard: FUSION240, STV6110AT, STV0903BAC, H5TQ2G63BFR-PBC, MT29F8G08ABACAWP
Tuner: SUT-RE214AN
Control: 242254990523 TVRC62312 / 12
Technical Specifications 55PFL8007T
PHILIPS 55PFL8007T
General repair guidelines for TV LCD LED
TV PHILIPS 55PFL8007T / 12, like many other electronic devices, it is advisable to start repairing by inspecting all external and internal elements. Sometimes, based on visible changes in the components of the device, it is possible to draw some conclusions and determine the direction of further troubleshooting even before the necessary measurements are taken. If ring cracks are detected in the soldered terminals of the elements or dangling connecting tracks, swollen capacitors or charred resistors - all this can be characteristic signs of the causes or consequences of an already known typical malfunction.
In the absence of any signs of operability, when the PHILIPS 55PFL8007T does not turn on and does not signal anything with the control lights on the panel, there is a possibility of a malfunction of the TV power supply module FSP157-4FS01 272217190676. With the same manifestations, the power regulator of the control processor on the motherboard may be faulty. When repairing the power supply, it is advisable to start the diagnostics by checking the mains fuse and the electrolytic capacitors of the filters of the converter secondary rectifiers. In the event of a fuse breaking, the reason should be sought in the power semiconductor elements of the pulse converter of the main power supply. First of all, it is necessary to check the diodes of the bridge of the rectifier of the mains voltage and the power switch (s) of the converter.
In most cases, key breakdowns in switching power supplies (SMPS) do not occur for no reason and you should look for other faulty circuit elements that could provoke a defect. This can be dried electrolytic capacitors in the primary circuit, and faulty damper elements, as well as dangling resistors or punched semiconductor elements in the stabilization circuits. Possible defective PWM chip from the manufacturer.
Sometimes the PHILIPS 55PFL8007T TV does not have an image, but there is sound, or the image appears and immediately disappears. In this case, there is a high probability of malfunction of the LTA550HQ19 932229486682 code 325 panel LED backlight converter, or a break in the LED circuit is possible. In such cases, first of all, it is necessary to verify the serviceability of all the electrolytic capacitors of the filter by supplying the LED driver itself, including in the power supply unit (power supply unit).
Often there is a need for disassembling the panel to check the health of the LEDs, as well as contact connections in the connectors and soldering.
To check the LED lines for breaks without disassembling the panel, for example, a current source will help. It is impossible to open series-connected PN junctions with a simple multimeter, a voltage of the order of several tens of volts is required.
In cases of attempts to repair the motherboard 310432869193, 310432869192, it is necessary to check the operability of the stabilizers or power converters of its microcircuits and, if possible, update the software (software). BGA chips can in most cases be diagnosed by local heating.
When repairing an MB board, you must check its components FR4CE 272217190703. Faulty components should be replaced. If BGA chips are installed, their malfunction is usually localized by heating. If chips with BGA soldering technology are used, a problem in its implementation is detected by the local heating of the chip.
Attention to the owners! Attempts at self-repair of the PHILIPS 55PFL8007T TV are not recommended by the manufacturer and can lead to serious negative consequences!
Service manual and schematic diagram 55PFL8007T/12 Chassis QFU1.1E LA
40PFL7007H/12, 40PFL7007K/12, 40PFL7007T/12, 40PFL8007K/12, 40PFL8007T/12, 42PFL6907H/12, 42PFL6907K/12, 42PFL6907T/12, 46PFL7007H/12, 46PFL7007K/12, 46PFL7007T/12, 46PFL8007K/12, 46PFL8007T/12, 46PFL9707S/12, 46PFL9707T/12, 47PFL6907H/12, 47PFL6907K/12, 47PFL6907T/12, 55PFL7007H/12, 55PFL7007K/12, 55PFL7007T/12, 55PFL8007K/12, 55PFL8007T/12, 60PFL9607S/12, 60PFL9607T/12
The appearance of MainBoard 310431365554 is shown in the figure below:310431365554
310431365554 can be used in TVs:
PHILIPS 40PFL7007T/12 (Panel LTA400HL15 code 003), PHILIPS 42PFL6907T/12 (Panel LC420EUF-PEF1 code 413), PHILIPS 46PFL8007T/12 (Panel LTA460HQ17 (SMGK) B p/n: 932229485682), PHILIPS 47PFL6907T/12 (Panel LC470EUF PEF1 code 414), PHILIPS 55PFL8007T/12 (Panel LTA550HQ19 code 325 p/n: 932229486682), PHILIPS 46PFL7007T/12 46PFL7007K/12 (Panel LTA460HQ17 ), PHILIPS 40PFL8007T/12 (Panel LTA400HL15), PHILIPS 46PFL9707T/12 (Panel LK460DL), PHILIPS 55PFL7007T/12 (Panel LTA550HQ19).
PSU Advanced
In the TV 55PFL8007T / 12, the FSP197-4FS01 power module is installed using the PFC (Power Factor Correction) scheme acting as an active filter to eliminate the higher harmonic components of the current consumption. The boost converter based on the FAN7930 PWM controller does not allow the input rectifier filter's electrolytic capacitor to be connected to the network directly through open diodes, when the reactance (about 15-30 ohms at a frequency of 50 Hz) determines the charge current. As a result of the conversion, the charging current of the capacitor will be determined in such a way that the envelope of the high-frequency pulses of the input current will repeat the phase and shape of the sine wave of the input voltage. The health check of the PFC unit is carried out by measuring the DC voltage on the capacitor of the rectifier network. In operating mode, it should be around 380V, in standby approximately 300V.
The appearance of the power supply
Main features of the PHILIPS 55PFL8007T device:
Installed matrix (LED panel) LTA550HQ19 code 325 p / n: 932229486682.
To power the backlight LEDs, a converter is used, combined with a power supply unit, controlled by a PWM controller OZ9909TN, LM358G.
The necessary supply voltages for all nodes of the PHILIPS 55PFL8007T TV are generated by the FSP197-4FS01 power module or its analogs using FAN7930 (PFC), FSB127H (Standby), SSC9522S (PWM resonant) microcircuits.
MainBoard - the main board (motherboard) is a module 310431365554, using chips FUSION240, STV6110AT, STV0903BAC, H5TQ2G63BFR-PBC, MT29F8G08ABACAWP and others.
The SUT-RE214AN tuner provides TV reception and channel tuning.