Technical description and composition of the PHILIPS 50PFT5300 TV, type of panel and applicable modules. The composition of the modules.PHILIPS LED
Model: 50PFT5300 / 60
Chassis / Version: TPM15.1E LA
Panel: TPT500J1-LE8
LED backlight: YX-11800742A0 3D554-0-C-56U2342
LED driver (backlight): integrated into PSU
PWM LED driver: LD7890GS
MOSFET LED driver: P3710BTF
Power Supply (PSU): 715G6338-P04-000-002M
PWM Power: LD7752B, LD7591T (PFC), LCS700LG
MOSFET Power: TK16A60W (PFC)
MainBoard: 715G6165-M01-001-005K
IC MainBoard: CPU: MT5580, EEPROM: 24128E, eMMC: P95L-4KA1-JW963
Tuner: TDSY-G720D
Specifications 50PFT5300
PHILIPS 50PFT5300
General repair guidelines for TV LCD LED
Possible malfunctions
- The PHILIPS 50PFT5300 TV does not turn on and does not show any signs of operability at all. There is no reaction to the remote control and control buttons from the front panel.
Most likely in this case, the main switching power supply (MPS) 715G6338-P04-000-002M is faulty. It is necessary to measure its output voltages and, in case of their absence, check the serviceability of power switches (TK16A60W (PFC)) and rectifier diodes in the converters for possible breakdown.
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 all other functions work. Sometimes when you turn on the image for a second appears and disappears.
The most likely in these cases is a malfunction of the LED backlight. 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 detect a break in the LED lines without disassembling the panel, a current source is required. It is impossible to open transitions connected in series with a simple multimeter; voltage of several tens of volts is necessary.
- The TV does not turn on, the indicator indicates standby or operating mode, or blinks.
Repair or diagnostics of the 715G6165-M01-001-005K 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). In some cases, to repair the MB (SSB) board, it may be necessary to replace the chips - CPU: MT5580, EEPROM: 24128E, eMMC: P95L-4KA1-JW963 with new or obviously working ones. In cases where BGA technologies are used, defects are usually localized by the heating method.
In the absence of tuning to the channels of on-air or cable television, you should make sure that the software is correct, as well as in accordance with the ratings of the supply voltage at the terminals of the TDSY-G720D tuner. It is also necessary to check the presence of pulses of data exchange between the tuner and the processor via the I2C bus using an oscilloscope.
We recommend the owners of the 50PFT5300 TV for repair only to qualified specialists with the necessary work experience! Self-repair attempts without the appropriate knowledge and skills can lead to irreversible negative consequences!
Service manual and schematic diagram -----------------------> PHILIPS 50PFT5300 Chassis TPM15.1E LA
The appearance of the MainBoard 715G6165-M01-001-005K is shown in the figure below:715G6165-M01-001-005K
Main features of the PHILIPS 50PFT5300 device:
Installed matrix (LED panel) TPT500J1-LE8.
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 50PFT5300 TV are generated by the 715G6338-P04-000-002M power supply module or its analogs using LD7752B, LD7591T (PFC), LCS700LG microcircuits and TK16A60W (PFC) type power switches.
MainBoard - the main board (motherboard) is a 715G6165-M01-001-005K 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.
