Technical description and composition of the PHILIPS 42PFL3507T TV, type of panel and applicable modules. The composition of the modules.PHILIPS LED
Model: 42PFL3507T / 60
Chassis / Version: TPM9.2E LA
Panel: LC420EUE SE M2 p / n: 932228891682
LED backlight: 6920L-0001C 2 * 60 led; cool: 6922L-0016A
T-CON: 6870C-0401B
LED driver (backlight): integrated into PSU
Power Supply (PSU): 715G5246-P01-000-002H 996590000026
PWM Power: SSC9522S (PWM resonant), A6069H (Standby 8pin), R2A20113 (PFC)
MainBoard: 715G5155-M01-002-005K (VerA) 996590001038
IC MainBoard: MT5366ZVGG, H5TQ1G63DFR-H9C, TMDS361BPAGR
Tuner: ENV57U04D8F
Control: IR: 715G5251-R01-000-004I
Specifications 42PFL3507T
PHILIPS 42PFL3507T
General repair guidelines for TV LCD LED
Repair of all electronic devices, including the PHILIPS 42PFL3507T / 60 TV, it is advisable to start with an external examination of its external and internal elements. 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. Elements with visible damage, for example, capacitors swelled up after boiling the electrolyte, charred resistors in certain nodes of the circuit, as well as ring cracks in solders will help the master to guess the causes and possible consequences of the malfunction.
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 715G5246-P01-000-002H 996590000026 power supply module is defective 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. In the general case, first of all, it is necessary to check the electrolytic capacitors of the secondary rectifier filters and the fuse at the input of the network. If it is broken, then you should check for breakdown of the PN junctions of the rectifier bridge diodes and the key transistor of the converter, which can either be on a separate radiator or integrated with a PWM controller in a common chip. Possible options.
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, a PWM controller, which can only be checked replacement, as well as other semiconductor elements (diodes, transistors, zener diodes).
In cases where the PHILIPS 42PFL3507T TV has lost its image, and the sound is there and all other functions are operational, there is a possibility of a malfunction of the LED driver (converter for powering the backlight LEDs of the LC420EUE SE M2 932228891682 panel). When you turn on the TV, the image may appear briefly and disappear immediately. It must be borne in mind that with such manifestations the LEDs themselves also fail.
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 should be remembered that it is not possible to determine the open circuit in the LED lines without disassembling the panels with a tester or multimeter without an additional device, for example, a current source. To open all PN junctions connected in series at once, a voltage of several tens of volts may be required.
The motherboard 715G5155-M01-002-005K (VerA) 996590001038 is to be checked if there is no reaction to the remote control and function buttons, the standby indicator blinks or lights up constantly. In such cases, if the converters or power regulators of the microcircuit are working, a software update may be necessary.
The malfunction of the tuner ENV57U04D8F is established after checking the software and all the supply voltages at its terminals, including the voltage of the varicaps (30-33V).
Once again, we remind TV users: you should not make attempts to repair it yourself without the appropriate knowledge, experience and the necessary qualifications! Trust the repair only to professionals with sufficient experience in the field of electronic equipment repair.
Service manual and schematic diagram 42PFL3507T/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-M01-002-005K is shown in the figure below:715G5155-M01-002-005K
715G5155-M01-002-005K can be used in TVs:
PHILIPS 19PFL3507T/60 (Panel LC185EXE (TE) (A1)), PHILIPS 32PFL3517T/60 (Panel T320HVN01.5 code 163 p/n: 996590001218), PHILIPS 42PFL3507T/60 (Panel LC420EUE SE M2 p/n: 932228891682).
PSU Advanced
The power module 715G5246-P01-000-002H is made using the Power Factor Correction (PFC) scheme to eliminate multiple AC harmonics introduced into the power supply by the device. The PFC node is a Step-Up Converter based on the R2A20113 PWM controller, which evenly distributes high-frequency pulses of the charging current of the electrolytic capacitor of the rectifier filter of the mains voltage within a 50 Hz period. 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 42PFL3507T device:
Installed matrix (LED panel) LC420EUE SE M2 p / n: 932228891682.
The matrix control uses the Timing Controller (T-CON) 6870C-0401B.
To power the backlight LEDs, a converter is used, combined with a power supply.
The necessary supply voltages for all nodes of the PHILIPS 42PFL3507T TV are generated by the 715G5246-P01-000-002H power supply module or its analogs using SSC9522S (PWM resonant), A6069H (Standby 8pin), R2A20113 (PFC) microcircuits.
MainBoard - the main board (motherboard) is a module 715G5155-M01-002-005K, using microchips 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