Technical description and composition of the PHILIPS 50PFL5038T TV, type of panel and applicable modules. The composition of the modules.PHILIPS LED
Model: 50PFL5038T / 60
Chassis / Version: TPM10.1E LA
Panel: LC500EUE FFF1
LED driver (backlight): integrated into PSU
PWM LED driver: PF7900S, PF7700A
MOSFET LED driver: AOTF4126
Power Supply (PSU): 715G5778-P02-000-002M DSPQ02002
PWM Power: SSC9522S (PWM Resonant), R2A20133ESP (PFC), A6069H (Standby)
MOSFET Power: STF8NM50N, STF24NM60N (PFC)
MainBoard: 715G5713-M0E-000-005K
IC MainBoard: CPU: MT5580MPOI; DRAM: H5TQ2G83DFR; NAND Flash: TC58NVG2S3ETAI0; SOUND: STA3818
Tuner: TDSY-G230D
Control: 715G5766-RC1
Specifications 50PFL5038T
PHILIPS 50PFL5038T
General repair guidelines for TV LCD LED
Repair of electronic equipment usually begins with its external inspection and diagnosis of the malfunction. In this case, you should examine all the internal components of the PHILIPS 50PFL5038T / 60 TV, as well as the external elements of the case. Visible damage to elements can sometimes indicate the direction of the search for a defect 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 cases where the PHILIPS 50PFL5038T TV does not turn on, does not respond to the remote control and buttons, no indicators on the front panel light up or blink, and there are no sounds and no signs of operability when turning on, the power supply module 715G5778-P02-000 is most likely faulty -002M DSPQ02002 or there is no processor power on the motherboard (a typical defect of some PHILIPS TVs). 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.
If, when you turn on the TV, the image appears and immediately disappears, or is initially absent when you turn on, but the sound has other functions that work, there is a high probability of a malfunction of the LED driver (LC500EUE FFF1 panel LED backlight power converter). In such cases, the general power module is also subject to verification, in which the electrolytic capacitors of the rectifier filter supplying the LED driver should be checked.
In most cases of lack of backlight, it becomes necessary to disassemble the panel in order to check the LEDs, connectors, loops and all contact connections. If one or several LEDs does not work in one line, therefore, they are broken and should be replaced.
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.
Repair or diagnostics of the motherboard 715G5713-M0E-000-005K should begin by checking the stabilizers or power converters of its microcircuits. If necessary, you should update the software (software).
In some cases, it is necessary to check or replace (if necessary) the elements of the MB board (SSB) - D0AEECCF3AD1. In cases where the BGA processor is used, its malfunction is usually detected by the local heating method.
Before replacing the TDSY-G230D tuner, if there is no tuning for the channels, first you need to check the supply voltage at its terminals, including the varicap supply (30-33V).
Remember! Attempts to self-repair by users of the PHILIPS 50PFL5038T TV without the appropriate qualifications and the necessary experience can lead to serious negative consequences!
SCHEMATIC MANUAL 50PFL5038T/60 Chassis TPM10.1E LA part1, part2, part3
The appearance of the MainBoard 715G5713-M0E-000-005K is shown in the figure below:715G5713-M0E-000-005K
715G5713-M0E-000-005K can be used in TVs:
PHILIPS 39PFL4208T/60 (Panel TPT390J1-HJ1L02 code 199), PHILIPS 42PFL3008T/60 (Panel TPT420H2-HVN04 code 194), PHILIPS 42PFL3208T/60 (Panel TPT420H2-HVN04 Rev080C code 194), PHILIPS 42PFL5028T/60 (Panel LC420EUE (FF)(F1) code 190), PHILIPS 50PFL5038T/60 (Panel LC500EUE FFF1).
PSU Advanced
The 50PFL5038T / 60 model uses a 715G5778-P02-000-002M power supply unit using the PFC (Power Factor Correction) node - an active filter of higher harmonics of the current consumption. In fact, it is a boost converter based on the R2A20133ESP PWM controller, which eliminates the charge current of the rectifier filter's electrolytic capacitor from the network directly through the open diodes when its charging current is determined by its reactance.
As a result of the operation of the converter, the envelope of the high-frequency pulses of the input current of the converter will repeat the shape and phase of the input voltage. The health of the PFC node can be indirectly judged by the presence of an increased constant voltage (about + 380V) on the capacitor of the rectifier network in operating mode.
The appearance of the power supply
Main features of the PHILIPS 50PFL5038T device:
Installed matrix (LED-panel) LC500EUE FFF1.
To power the backlight LEDs, a converter is used, combined with a power supply unit, controlled by the PF7900S, PF7700A PWM controller. As power elements of the LED driver, keys of the AOTF4126 type are used.
The required supply voltages for all nodes of the PHILIPS 50PFL5038T TV are generated by the 715G5778-P02-000-002M power supply module or its analogs using SSC9522S (PWM Resonant), R2A20133ESP (PFC), A6069H (Standby) microcircuits and STF8NM50N, STF8 power switches (STF8NM50N, STF8 PFC).
MainBoard - the main board (motherboard) is a 715G5713-M0E-000-005K module, using CPU chips: MT5580MPOI; DRAM: H5TQ2G83DFR; NAND Flash: TC58NVG2S3ETAI0; SOUND: STA3818 and others.
The TDSY-G230D tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: LG Display
Model: LC500EUE-FFF1
Type: a-Si TFT-LCD, Panel
Diagonal size: 50 inch
Resolution: 1920x1080, FHD
Display Mode: IPS, Normally Black, Transmissive
Active Area: 1095.84x616.41 mm
Surface: Antiglare (Haze 1%), Hard coating (2H)
Brightness: 350 cd / m²
Contrast Ratio: 1400: 1
Display Colors: 16.7M (8-bit)
Response Time: 6 (G to G)
Frequency: 60Hz
Lamp Type: WLED Without Driver
Signal Interface: LVDS (2 ch, 8-bit), 51 pins
Voltage: 12.0V