Technical description and composition of the PHILIPS 40PFL5007T TV, type of panel and applicable modules. The composition of the modules.PHILIPS LED
Model: 40PFL5007T / 60
Chassis / Version: Q552.4E LA
Panel: LTA400HV04 001 code 396
LED backlight: SLED 2012SGS40 7030L 56 REV1.0
LED driver (backlight): integrated into PSU
PWM LED driver: DDA009
Power Supply (PSU): DPS-119AP DELTA
PWM Power: DDA010 (Standby), S101, 1608B (PFC), 2QS02G
MainBoard: 313929713504
Tuner: SUT-RE214AN
Specifications 40PFL5007T
PHILIPS 40PFL5007T
General repair guidelines for TV LCD LED
It is advisable to start repairing the PHILIPS 40PFL5007T / 60 TV with a careful external examination of both internal and external elements. Many visible changes in the state of the elements make it possible to determine the further direction of troubleshooting and localization of the defect. If ring cracks are detected in the soldering of the 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.
Sometimes the PHILIPS 40PFL5007T TV simply does not turn on. No control lights on the front panel are lit or blinking, the TV does not respond to the remote control and does not make any sounds or any signs of life when turned on. The most likely cause of the malfunction is the failure of the DPS-119AP DELTA common power supply module. If it is working properly, you need to check the processor batteries on the SSB (Main Board). In the general case, first of all, it is necessary to check the electrolytic capacitors of the secondary rectifier filters and the fuse at the input of the network. If it is broken, then you should check for breakdown of the PN junctions of the rectifier bridge diodes and the key transistor of the converter, which can either be on a separate radiator or integrated with a PWM controller in a common chip. Possible options.
Mos-Fet keys used in switching power supplies (SMPS) rarely fail for no reason to look for when checking other circuit elements. Often the breakdown is caused by malfunctions of electrolytic capacitors or semiconductor elements in the primary circuit, or by a break in the resistors in the stabilization circuits. The PWM controller chip DDA010 (8) can also cause a breakdown of the power switch of the converter.
If the PHILIPS 40PFL5007T does not have an image, but there is sound, the backlight LEDs of the LTA400HV04 001 code 396 or their power converter may malfunction. You should also make sure that the electrolytic capacitors of the secondary rectifiers of the common power supply are working.
To check the health of the LEDs, as well as contact connections in the ruler circuit, it is necessary to disassemble the panel.
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.
When trying to repair the motherboard, you should first check the serviceability of linear stabilizers or power converters of microcircuits and, if necessary, update the software (software).
Before changing the SUT-RE214AN tuner, if it is not possible to tune to television channels, make sure that there are supply voltages, including varicap power (30-33V), which must be measured on the corresponding tuner pins.
Attention to the owners! Attempts at self-repair of the PHILIPS 40PFL5007T TV are not recommended by the manufacturer and can lead to serious negative consequences!
Service manual and schematic diagram 40PFL5007T/60 Chassis Q552.4E LA
PSU --------------> DPS-119AP A Power Supply schematic diagram
The appearance of MainBoard 313929713504 is shown in the figure below:313929713504
PSU Advanced
According to the conditions of compliance with modern world standards for household switching power supplies, the DPS-119AP module provides for the use of a Power Factor Correction unit. The PFC circuit is a flyback converter based on the 1608B PWM controller. The reactance of an electrolytic capacitor of a line filter at a frequency of 50-60 Hz is usually not more than 20-30 ohms and its charge directly from the network through open diodes could reach tens of amperes per pulse if no filtering were applied.
As a result of the PFC conversion, an increased voltage on the capacitor (about 380V) cannot directly open the rectifier diodes, on the anode of which the voltage will always be slightly less (about 300V) and then its charging current will always be limited by the elements of the PWM controller. As a result, the envelope of the high-frequency pulses of the consumed current will repeat the shape and phase of the input sinusoidal voltage. The presence of an increased voltage (+ 380V) on the network capacitor indicates the serviceability of the PFC node.
The appearance of the power supply
Main features of the PHILIPS 40PFL5007T device:
Installed matrix (LED-panel) LTA400HV04 001 code 396.
To power the backlight LEDs, a converter is used, combined with a power supply unit, controlled by the DDA009 PWM controller.
The necessary supply voltages for all nodes of the PHILIPS 40PFL5007T TV are generated by the DPS-119AP power module or its analogs using DDA010 (Standby), S101, 1608B (PFC), 2QS02G microcircuits.
MainBoard - the main board (motherboard) is a module 313929713504.
The SUT-RE214AN tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: SAMSUNG
Model: LTA400HV04
Type: a-Si TFT-LCD, Panel
Diagonal size: 40 inch
Resolution: 1920x1080, FHD
Display Mode: S-PVA, Normally Black, Transmissive
Active Area: 885.6x498.15 mm
Surface: Antiglare (Haze 2%)
Brightness: 400 cd / m²
Contrast Ratio: 5000: 1
Display Colors: 1.07B (8-bit + Hi-FRC), CIE1931 70%
Response Time: 8 (Max.) (G to G)
Frequency: 120Hz
Lamp Type: WLED Embedded (LED Driver)
Signal Interface: LVDS (4 ch, 10-bit), 92 pins
Voltage: 12.0V