Technical description and composition of the PHILIPS 46PFL4208T TV, type of panel and applicable modules. The composition of the modules.PHILIPS LED
Model: 46PFL4208T / 60
Chassis / Version: TPM10.1E LA
Panel: TPT460H1-HM01 REVC1F
LED driver (backlight): integrated into PSU
PWM LED driver: PF7900S, PF7700A
MOSFET LED driver: AOTF4126
Power Supply (PSU): 715G5778-P02-000-002S
PWM Power: SSC9522S (PWM Resonant), R2A20133ESP (PFC), A6069H (Standby)
MOSFET Power: STF8NM50N, STF24NM60N (PFC)
MainBoard: 715G5713-M0E-000-005N
IC MainBoard: CPU: MT5580MPOI; DRAM: H5TQ2G83DFR; NAND Flash: TC58NVG2S3ETAI0; SOUND: STA3818
Tuner: TDSY-G230D
Specifications 46PFL4208T
PHILIPS 46PFL4208T
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 46PFL4208T / 60 TV, as well as the external elements of the housing. According to some external signs of a change in the state of some elements, it is sometimes possible to make assumptions about the nature of the defect, as well as determine the further direction of the troubleshooting. In some cases, faulty elements can be seen with the naked eye, for example, charred resistors or swollen metal-ceramic capacitors, or electrolytic in rectifier filters. Ring cracks formed in the soldered terminals of transformers or heating elements of the circuit are also frequent sources of many malfunctions with a variety of external manifestations.
If the TV does not turn on, no indicators on its front panel are lit or blinking. Also, if the TV does not respond to the remote control and buttons, it does not make any sounds or any signs of operability when it is turned on, there is a certain chance that the 715G5778-P02-000-002S power module is faulty and needs repair. Sometimes with similar manifestations a problem can only occur in the absence of processor power, which is typical for certain PHILIPS models. First of all, it is necessary to replace the swollen capacitors of the rectifier filters, if any. If the mains fuse is broken in the power supply, in most cases a breakdown of the power key (s) is detected, which can be integrated with the PWM controller, or a separate field-effect transistor can be used. The rectifier bridge diodes and the electrolytic capacitor of the mains rectifier filter should also be checked.
Mos-Fet keys used in switching power supplies (SMPS) rarely fail for no reason to look for when checking other circuit elements. Often the breakdown is caused by malfunctions of electrolytic capacitors or semiconductor elements in the primary circuit, or by a break in the resistors in the stabilization circuits. The PWM controller chip can also cause a breakdown of the power switch of the converter.
Sometimes the PHILIPS 46PFL4208T TV does not have an image, but there is sound, or the image appears and immediately disappears. In this case, there is a high probability of a malfunction of the TPT460H1-HM01 REVC1F panel backlight LED converter, or a break in the LED circuit is possible. In such cases, first of all, it is necessary to verify the serviceability of all the electrolytic capacitors of the filter by supplying the LED driver itself, including in the power supply unit (power supply unit).
To check the health of the LEDs and contact connections in their power circuit, the panel must be disassembled.
It is impossible to check the LED line for breaks without disassembling the panel with a multimeter or tester. For these purposes, it is necessary to open all series-connected PN junctions and a voltage of the order of tens of volts will be required, and ideally, a current source.
If the motherboard 715G5713-M0E-000-005N is faulty, first of all it is necessary to check all the linear stabilizers or power converters of its chips, and also, if necessary, update the software. Sometimes you can check the health of MB only by replacement.
Owners and users of the PHILIPS 46PFL4208T TV must remember that self-repair without special knowledge, skills and qualifications can be fraught with negative consequences that can lead to complete non-repairability of the device!
SCHEMATIC MANUAL 46PFL4208T/60 Chassis TPM10.1E LA part1, part2, part3
The appearance of MainBoard 715G5713-M0E-000-005N is shown in the figure below:715G5713-M0E-000-005N
715G5713-M0E-000-005N can be used in TVs:
PHILIPS 32PFL5008T/60 (Panel LC320EUE (FF)(F1) code 189 p/n: 932229831682), PHILIPS 46PFL4208T/60 (Panel TPT460H1-HM01 REVC1F), PHILIPS 50PFL5028T/60 (Panel LC500EUE-FFF1 code 192 p/n: 932229834682), PHILIPS 32PFL4418T/60 (Panel LTA320HJ06).
PSU Advanced
The power module 715G5778-P02-000-002S is made using the Power Factor Correction (PFC) scheme in order to eliminate multiple AC harmonics introduced by the device into the mains. The PFC node is a Step-Up Converter based on the R2A20133ESP PWM controller, which evenly distributes high-frequency pulses of the charging current of the electrolytic capacitor of the rectifier filter of the mains voltage over a period of 50 Hz. The current of its charge in this case will already be determined not by its reactance (usually 10-30 ohms for the network frequency), but by the elements of the converter. As a result, a change in the amplitude of the pulses (envelope) of the consumed current of the converter will repeat the shape and phase of the input sinusoidal voltage. The availability of an increased voltage (about + 380V) in the operating mode on the capacitor of the line filter indicates the serviceability of the PFC node.
The appearance of the power supply
Main features of the PHILIPS 46PFL4208T device:
Installed matrix (LED-panel) TPT460H1-HM01 REVC1F.
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 necessary supply voltages for all nodes of the PHILIPS 46PFL4208T TV are generated by the 715G5778-P02-000-002S power supply module or its analogs using SSC9522S (PWM Resonant), R2A20133ESP (PFC), A6069H (Standby) microcircuits and STF8NMN60N, STF8NM50N, ST32 power switches PFC).
MainBoard - the main board (motherboard) is a 715G5713-M0E-000-005N module, using CPU chips: MT5580MPOI; DRAM: H5TQ2G83DFR; NAND Flash: TC58NVG2S3ETAI0; SOUND: STA3818 and others.
The TDSY-G230D tuner provides TV reception and channel tuning.