Technical description and composition of the PHILIPS 42PFL3507H TV, type of panel and applicable modules. The composition of the modules.PHILIPS LED
Model: 42PFL3507H / 60
Chassis / Version: TPM9.2E LA
Panel: LC420EUE SE M2 code 158
LED backlight: 6920L-0001C 2 * 60 led; cool: 6922L-0016A
LED driver (backlight): 715G5246-P01-000-002S
Power Supply (PSU): 715G5246-P01-000-002S
PWM Power: SSC9522S (PWM resonant), A6069H (Standby 8pin), R2A20113 (PFC)
MainBoard: 715G5155-M01-003-005K
IC MainBoard: MT5366ZVGG, H5TQ1G63DFR-H9C, TMDS361BPAGR
Tuner: ENV57U04D8F
Control: 098GR7BDHNTPHT 1203008934
Specifications 42PFL3507H
PHILIPS 42PFL3507H
General repair guidelines for TV LCD LED
Diagnostics of malfunctions and repairs PHILIPS 42PFL3507H / 60, as well as other electronic devices, it is recommended to start with an external examination of the external and internal elements. Often, by the external signs and nature of the damage to the elements, it becomes possible to draw some conclusions and determine a further algorithm for finding a defect before making the necessary measurements at control points. Carbonized paint on the upper layer of resistors, electrolytic capacitors of rectifier filters swollen after boiling, cracked soldering at the terminals of heating elements or transformers can often suggest the cause of the defect and possible consequences.
Faults in the 715G5246-P01-000-002S power supply module can be expressed in different ways, for example, PHILIPS 42PFL3507H does not turn on at all and the control lamps on its front panel do not light up and do not blink, and there are no signs of operability. It should be noted that with the same external manifestations, the processor power regulator (converter) may be faulty. 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.
The reasons for the breakdown of the power switch in pulsed power supplies (IIPS) can be different, for example, a malfunction of semiconductor cells or electrolytic capacitors in the stabilization circuits of the primary circuit, as well as a failure in the operation of the PWM controller chip or broken resistors in its bundle.
Sometimes the PHILIPS 42PFL3507H 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 malfunction of the converter for the backlight LEDs of the LC420EUE SE M2 code 158, 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).
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.
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.
On the motherboard 715G5155-M01-003-005K, in the event of a malfunction, you should first check the performance of all the stabilizers or power converters of the microcircuits and, if necessary, update the software (software).
If the TV works normally from external devices, but does not tune into television channels, the tuner ENV57U04D8F may be malfunctioning. In such cases, first of all, you should make sure that there are supply voltages at its corresponding terminals, as well as the power supply of varicaps (30-33V).
Once again, remind users! Attempts to independently repair the PHILIPS 42PFL3507H TV without the appropriate qualifications and experience can lead to its complete non-repairability!
Service manual and schematic diagram 42PFL3507H/60 Chassis TPM9.2E LA
FOR MODELS: 32PFL3517H/12, 32PFL3507K/02, 32PFL3517K/02, 37PFL3507H/12, 37PFL3507K/02, 42PFL3507H/12, 42PFL3507K/02
The appearance of the MainBoard 715G5155-M01-003-005K is shown in the figure below:715G5155-M01-003-005K
PSU Advanced
According to the conditions of compliance with modern world standards for household switching power supplies, the 715G5246-P01-000-002S module provides for the use of the Power Factor Correction unit. The PFC circuit is a flyback converter based on the R2A20113 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 were 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 42PFL3507H device:
Installed matrix (LED panel) LC420EUE SE M2 code 158.
The LED driver 715G5246-P01-000-002S is used to power the backlight LEDs.
The necessary supply voltages for all nodes of the PHILIPS 42PFL3507H TV are generated by the power supply module 715G5246-P01-000-002S, or its analogs using SSC9522S (PWM resonant), A6069H (Standby 8pin), R2A20113 (PFC) microcircuits.
MainBoard - the main board (motherboard) is a module 715G5155-M01-003-005K, using chips MT5366ZVGG, H5TQ1G63DFR-H9C, TMDS361BPAGR and others.
The ENV57U04D8F tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: LG Display
Model: LC420EUE-SEM2
Type: a-Si TFT-LCD, Panel
Diagonal size: 42 inch
Resolution: 1920x1080, FHD
Display Mode: S-IPS, Normally Black, Transmissive
Active Area: 930.24x523.26 mm
Surface: Antiglare (Haze 1%), Hard coating (3H)
Brightness: 400 cd / m²
Contrast Ratio: 1400: 1
Display Colors: 16.7M (8-bit), CIE1931 68%
Response Time: 6 (G to G)
Frequency: 60Hz
Lamp Type: 6 strings WLED Without Driver
Signal Interface: LVDS (2 ch, 8-bit), 51 pins
Voltage: 12.0V