Technical description and composition of the PHILIPS 50PFT4509 TV, type of panel and applicable modules. The composition of the modules.PHILIPS LED
Model: 50PFT4509 / 12
Chassis / Version: TPM14.1E LA
Panel: TPT500J1-LE8 (SC1D)
T-CON: V500HJ1-PE8 Rev. C1
LED driver (backlight): integrated into PSU
PWM LED driver: LD7890GS
MOSFET LED driver: P3710BTF
Power Supply (PSU): 715G6338-P03-000-002M
PWM Power: LD7752B, LD7591T (PFC), LCS700LG
MOSFET Power: TK16A60W
MainBoard: 715G6165-M02-000-005N WK: 1343
IC MainBoard: CPU: MT5580, EEPROM: 24128E, eMMC: P95L-4KA1-JW963
Tuner: TDSY-G720D
Specifications 50PFT4509
PHILIPS 50PFT4509
General repair guidelines for TV LCD LED
Possible malfunctions
- The PHILIPS 50PFT4509 TV does not turn on at all. The control lights do not light or flash. The TV on the remote control and the control panel buttons do not respond.
Most likely in this case, the main switching power supply (MPS) 715G6338-P03-000-002M is faulty. Then we recommend that you measure its output voltages and, if they are absent, you should check the health of the power switches (TK16A60W) and the rectifier diodes of the converters for possible short-circuit.
In the event of a breakdown in the secondary circuits of the converter, it can usually fail in short circuit mode, and in the event of a short circuit in the power elements of the primary circuit, the mains fuse or current sensor at the source of the key most often breaks.
Mos-Fet keys used in switching power supplies usually fail due to a malfunction of other elements that can put it out of operation in key mode or provoke an excess of the maximum current or voltage. These can be circuits supplying the PWM controller, damping or frequency-setting circuits, or elements of OOS (negative feedback) in the stabilization circuit. PWM controllers (PWM) LD7752B, LD7591T (PFC), LCS700LG, in the absence of external damage and short circuit between the terminals, are checked by replacing with obviously good ones.
- There is no image, but there is sound and reaction to the remote control. Or for a second, the image may appear immediately after switching on.
The faulty usually in these cases is the backlight matrix (LED-panel). The reason may be a break in the LEDs, in the stabilization of their power supply, or in the violation of the contact connections of the thong connectors,
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 indicator blinks or lights constantly, the TV does not turn on, does not respond to the remote control.
Repair or diagnostics of the 715G6165-M02-000-005N motherboard should begin by checking the stabilizers and power converters needed to power the microcircuits and matrix. If necessary, update or replace the software (software). Complex repair of MB (SSB) is possible only in the conditions of a service center with the necessary equipment. Checking or replacing CPU elements: MT5580, EEPROM: 24128E, eMMC: P95L-4KA1-JW963 requires the necessary training and professional skills to repair modules at the component level. Problems associated with the use of BGA soldering technologies can sometimes be diagnosed by warming up.
Before replacing the TDSY-G720D tuner, if there is no tuning to the channels, you must first check the software and the supply voltage at its terminals. It is also necessary to make sure that the tuner and processor can exchange data via the I2C bus
It should be remembered! Attempts to independently repair the PHILIPS 50PFT4509 TV, in the absence of the necessary qualifications and experience, are categorically not recommended and are fraught with negative consequences, up to the complete non-serviceability of the device!
Service manual and schematic diagram 47PFT5609/60 Chassis TPM14.1E LA
The appearance of the MainBoard 715G6165-M02-000-005N is shown in the figure below:715G6165-M02-000-005N
The appearance of the power supply
Main features of the PHILIPS 50PFT4509 device:
Installed matrix (LED-panel) TPT500J1-LE8 (SC1D).
The matrix control uses the Timing Controller (T-CON) V500HJ1-PE8.
To power the backlight LEDs, a converter is used, combined with a power supply, controlled by the LD7890GS PWM controller. As the power elements of the LED driver, keys of the P3710BTF type are used.
The necessary supply voltages for all nodes of the PHILIPS 50PFT4509 television are generated by the 715G6338-P03-000-002M power supply module or its analogs using LD7752B, LD7591T (PFC), LCS700LG microcircuits and TK16A60W power switches.
MainBoard - the main board (motherboard) is a 715G6165-M02-000-005N module, using CPU chips: MT5580, EEPROM: 24128E, eMMC: P95L-4KA1-JW963 and others.
The TDSY-G720D tuner allows you to receive television programs and tune to channels.