Technical description and composition of the PHILIPS 40PFL4418T TV, type of panel and applicable modules. The composition of the modules.PHILIPS LED
Model: 40PFL4418T / 60
Chassis / Version: TPM10.1E LA
Panel: LTA400HF30
LED backlight: LJ97-04425A, LJ07-01127A, KF303141A3, SAMSUNG 2013SLS40 7030NNB 54 REV1.0
T-CON: 13NNB_SQ60VAMB4C4LV0.1
LED driver (backlight): 715G5787-P02-000-002S
PWM LED driver: PF7900S (PWM), PF7700A (Current Balance)
MOSFET LED driver: AOD4126
Power Supply (PSU): 715G5792-P03-000-002M
PWM Power: LD7591T (PFC), SSC1S311, PF8200S
MOSFET Power: TK15A60U
MainBoard: 715G5713-M0F-000-005K
IC MainBoard: DRAM: H5TQ2G83DFR; NAND Flash: TC58NVG2S3ETAI0; SOUND: STA3818; U701 + 1.5v. U705.U706 + 3.3v
Tuner: TDSY-G230D
Control: Remote: 996590004765, IR: 715G5762-R01-000-004S, WiFi: D0AEECBAE600
Specifications 40PFL4418T
PHILIPS 40PFL4418T
General repair guidelines for TV LCD LED
TV PHILIPS 40PFL4418T / 60, like many other electronic devices, it is advisable to start repairing by inspecting all external and internal elements. In some cases, visible external damage to the elements can suggest the direction of troubleshooting and localization of the defect even before the start of the necessary measurements at the control points of the nodes of electronic circuits. Experienced repairmen are often aware of the causes of the defect and the possible consequences, for example, from ring cracks in the soldering of the leads of the elements, as well as from swollen capacitors or resistors burnt to coal dust and other external indirect signs.
In the case when the 40PFL4418T does not turn on, does not respond to the remote control and buttons on the front panel, does not blink bulbs and does not show any signs of operability, the power supply module 715G5792-P03-000-002M is probably faulty in this case. If it is serviceable with such manifestations, it is necessary to check the stabilizer (converter) of the processor power supply on the motherboard. Diagnostics and repair of the general power supply unit should always begin by checking the mains fuse and the condition of the electrolytic capacitors of the secondary rectifier filters. Defective and swollen capacitors should be replaced with new ones. If the fuse breaks, it is advisable to check for a breakdown, first of all, all the power semiconductor elements of the converter and the diode bridge of the rectifier network, as well as the large electrolytic capacitor of the filter of the rectifier network.
If a breakdown of the power switch is detected, it should be remembered that in a switching power supply (IIP) it does not fail by itself without any reasons that should be sought by checking other elements of the primary circuit - electrolytic capacitors, PWM controller K15A600. 11N70. NR111D, which can only be checked by replacement, as well as other semiconductor elements (diodes, transistors, zener diodes).
If there is no image when you turn on the PHILIPS 40PFL4418T, or it appears for a second and disappears, but there is sound, most likely there is a malfunction in the backlight LED circuit of the LTA400HF30 panel, or in their power converter. It is necessary to check the electrolytic capacitors of the filter of the secondary rectifiers in the general power supply unit.
Often in the absence of backlighting, disassembling the panel is required. It is necessary to check the serviceability of the transitions of the LEDs, as well as the reliability of the contact connections in the rulers and connectors.
A break in the line of LEDs connected in series cannot be detected with a multimeter or tester without disassembling the panel. To open all the transitions, several tens of volts are needed, and it is best to use a current source for such purposes.
SSB motherboard: 705TQDSCM1901C must be checked if there is no reaction to the remote control and function buttons, the standby indicator blinks or stays on. In such cases, if the converters or power regulators of the microcircuit are working, a software update may be necessary.
Board repair and replacement of U701 chips with 1.5v. U705.U706 at 3.3v are produced with the necessary equipment, and the corresponding element base. Faults associated with the application of BGA processor soldering technologies can be localized by the heating method.
Attention to users! Self-repair of a PHILIPS 40PFL4418T TV without the appropriate qualifications and experience can lead to its complete non-repairability!
Service manual and schematic diagram 40PFL3108T/60 Chassis TPM10.1E LA part1, part2, part3
The appearance of MainBoard 715G5713-M0F-000-005K is shown in the figure below:715G5713-M0F-000-005K
715G5713-M0F-000-005K can be used in TVs:
PHILIPS 39PFL3208T/60 (Panel TPT390J1-HJ1L02), PHILIPS 40PFL4418T/60 (Panel LTA400HF30), PHILIPS 40PFL4508T/60 (Panel LTA400HF30 001 SAMSUNG code 186 p/n: 99659004071), PHILIPS 40PFL4528T/60 (Panel LTA400HF30), PHILIPS 32PFL4258T/60 (Panel TPT315B5-HVN01 REV.S210E), PHILIPS 32PFL3258T/60 (Panel TPT315B5-EUJFFA REV:S1A).
PSU Advanced
According to the conditions of compliance with modern world standards for household switching power supplies, the 715G5792-P03-000-002M module provides for the use of a Power Factor Correction unit. The PFC circuit is a flyback converter based on the LD7591T 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 was 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 40PFL4418T device:
Installed matrix (LED-panel) LTA400HF30.
The matrix control uses the Timing Controller (T-CON) 13NNB_SQ60VAMB4C4LV0.1.
The LED driver 715G5787-P02-000-002S is used to power the backlight LEDs, it is controlled by the PF7900S (PWM), PF7700A (Current Balance) PWM controller. As power elements of the LED driver, keys of the AOD4126 type are used.
The necessary supply voltages for all nodes of the PHILIPS 40PFL4418T TV are generated by the 715G5792-P03-000-002M power supply module or its analogs using LD7591T (PFC), SSC1S311, PF8200S microcircuits and TK15A60U power switches.
MainBoard - the main board (motherboard) is a 715G5713-M0F-000-005K module, using DRAM chips: H5TQ2G83DFR; NAND Flash: TC58NVG2S3ETAI0; SOUND: STA3818; U701 + 1.5v. U705.U706 + 3.3v and others.
The TDSY-G230D tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: SAMSUNG
Model: LTA400HF30-W
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%), Hard coating (2H)
Brightness: 350 cd / m²
Contrast Ratio: 5000: 1
Display Colors: 1.07B (8-bit + Hi-FRC), CIE1931 70%
Response Time: 8 (G to G)
Frequency: 120Hz (60Hz Input)
Lamp Type: WLED Without Driver
Signal Interface: LVDS (2 ch, 10-bit), 61 pins
Voltage: 12.0V