Technical description and composition of the PHILIPS 50PFT6550 TV, type of panel and applicable modules. The composition of the modules.PHILIPS LED
Model: 50PFT6550 / 12
Panel: TPT500J1-HVN08.A
T-CON: T500HVN08.7 CTRL BD
LED driver (backlight): integrated into PSU
Power Supply (PSU): 715G6973-P01-002-002H
MainBoard: 715G7030-MOG-000-005T (WK1504)
IC MainBoard: K4B2G1646Q-BCMA, TAS5760LD
Tuner: TDSY-G480D
Specifications 50PFT6550
PHILIPS 50PFT6550
General repair guidelines for TV LCD LED
Possible malfunctions
- The PHILIPS 50PFT6550 TV does not turn on. There are no signs of operability. The indicators on the front panel do not light or flash, the TV does not respond to the remote control and control buttons.
Often in such cases, the 715G6973-P01-002-002H power module is faulty. It is then necessary to measure its output voltages and, if they are absent, it is necessary to check the power switches and rectifier diodes of the converters for a short-circuit probability.
In case of breakdowns in the secondary circuits, the converter can operate in a short circuit mode, and during short circuit in the elements of the primary circuit, the mains fuse usually breaks.
The breakdown of Mos-Fet keys used in pulsed sources is often caused by malfunctions of other elements, for example, in the power supply circuit of a PWM controller, in frequency-setting or damping circuits, as well as in Negative Stabilization Feedback. PWM microcircuits are usually checked by replacement with new ones, or obviously working.
- There is no image, there is sound, it is responding to the remote control. Or immediately after turning on for a second, the image may appear and immediately disappear.
In some of these cases, the malfunction is caused by a lack of backlighting on the display. The reason for this may be a break in the LED circuit, or a problem in stabilizing their power supply.
To check the health in the LED circuit, it is better to use a current source with a maximum voltage of 200V. We do not recommend using any voltage sources for this purpose. You can check each LED individually with a simple Chinese multimeter (powered by 9 volts) in the P-N-junction test mode. If you connect the red probe of the multimeter to the anode of the LED, and the black to its cathode, then the 3-volt LED will light up slightly, and in the opposite direction you can detect the transition of the emergency zener diode. A zener diode PN junction indirectly indicates a LED-a
- The TV does not turn on, does not respond to the remote control. The indicator blinks or signals standby mode.
Repair or diagnostics of the 715G7030-MOG-000-005T motherboard should begin by checking the stabilizers and power converters needed to power the microcircuit and matrix. If necessary, update or replace the software (software). In cases of attempts to repair the MB board (SSB), it is necessary to check the health of its elements - K4B2G1646Q-BCMA, TAS5760LD which may require replacement with new ones. If a BGA processor is installed, there is a possibility of a violation of the soldering of the contacts of its conclusions with the board (it is diagnosed by heating).
The malfunction of the TDSY-G480D tuner is established after checking the software and all the supply voltages at its terminals. The data exchange of the tuner with the processor via the I2C bus can be controlled by an oscilloscope.
Attention! For users and owners of 50PFT6550 TVs who do not have the appropriate qualifications, knowledge and experience, we categorically do not recommend attempting self-repair in order to avoid negative consequences that could lead to complete non-repairability of the device.
The appearance of the MainBoard 715G7030-MOG-000-005T is shown in the figure below:715G7030-MOG-000-005T
The appearance of the power supply
Main features of the PHILIPS 50PFT6550 device:
Installed matrix (LED panel) TPT500J1-HVN08.A.
The matrix control uses the Timing Controller (T-CON) T500HVN08.7.
To power the backlight LEDs, a converter is used, combined with a power supply.
The necessary supply voltages for all nodes of the PHILIPS 50PFT6550 TV are generated by the power module 715G6973-P01-002-002H, or its analogs.
MainBoard - the main board (motherboard) is a 715G7030-MOG-000-005T module, using K4B2G1646Q-BCMA, TAS5760LD and others.
The TDSY-G480D tuner allows you to receive television programs and tune to channels.