Technical description and composition of the PHILIPS 42PFL6907T TV, type of panel and applicable modules. The composition of the modules.PHILIPS LED
Model: 42PFL6907T / 12
Chassis / Version: QFU1.1E LA
Panel: LC420EUF-PEF1 code 413
LED driver (backlight): integrated into PSU
PWM LED driver: BD9479FV
Power Supply (PSU): FSP145-4FS01 3.3V. 12.3V. 58V
PWM Power: FSB117H (Standby 8pin), FAN7930C (PFC), SSC9522S (PWM resonant)
MainBoard: 310431365554 310432868323 - 3104 313 65554 3104 313 65554A // 3104 313 65664
IC MainBoard: 29F8G08ABABA, SII9387ACTUC, D2834ER, TAS5731 // FNP102-B2E31
Tuner: SUT-RE214AN H 2H069E
Specifications 42PFL6907T
PHILIPS 42PFL6907T
General repair guidelines for TV LCD LED
Repair and diagnostics of any electronic device, in particular PHILIPS 42PFL6907T / 12, it is advisable to start with a careful external examination of internal and external elements. In some cases, visible external damage to the elements can indicate the direction of troubleshooting and localization of the defect even before the start of the necessary measurements at the control points of electronic circuit nodes. 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.
In the absence of any signs of operability, when the PHILIPS 42PFL6907T does not turn on and does not signal anything with the control lights on the panel, there is a possibility of a failure of the FSP145-4FS01 3.3V power supply module. 12.3V. 58V TV. With the same manifestations, the power regulator of the control processor on the motherboard may be faulty. Diagnostics and repair of the common power supply should always begin with a check of 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.
Power switches in pulsed power supplies (SMPS) fail extremely rarely for no reason and, if they are broken, it is necessary to look for a malfunction in the stabilization circuits by checking electrolytic capacitors, semiconductor devices, and resistors in the primary circuit. The reason may be a malfunction of the PWM controller microcircuit /, which can only be checked by replacing it with a new or obviously working one.
If the PHILIPS 42PFL6907T does not have an image, but there is sound, the backlight LEDs of the TFT LCD LC420EUF-PEF1 code 413 or their power converter may malfunction. You should also make sure that the electrolytic capacitors of the secondary rectifiers of the common power supply are working.
To check the health of the LEDs, as well as contact connections in the ruler 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.
In cases of attempts to repair the motherboard YU 240.3 AI1.B 310432868323, it is necessary to check the operability of the stabilizers or power converters of its microcircuits and, if possible, update the software (software). BGA chips can in most cases be diagnosed by local heating.
Sophisticated MB board repair (SSB) is in some cases possible and practiced by repairmen. To do this, check and, if necessary, replace the elements 29F8G08ABABA SII9387ACTUC D2834ER TAS5731. BGA chip malfunctions are usually easy to detect by warming up.
If there is no reception of television channels, but the TV is working properly from external devices, first of all it is necessary to check the voltage of the varicaps of the tuner SUT-RE214AN H 2H069E, which is usually within 30-33V, as well as other supply voltages at the terminals of the tuner.
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 42PFL6907T/12 Chassis QFU1.1E LA
40PFL7007H/12, 40PFL7007K/12, 40PFL7007T/12, 40PFL8007K/12, 40PFL8007T/12, 42PFL6907H/12, 42PFL6907K/12, 42PFL6907T/12, 46PFL7007H/12, 46PFL7007K/12, 46PFL7007T/12, 46PFL8007K/12, 46PFL8007T/12, 46PFL9707S/12, 46PFL9707T/12, 47PFL6907H/12, 47PFL6907K/12, 47PFL6907T/12, 55PFL7007H/12, 55PFL7007K/12, 55PFL7007T/12, 55PFL8007K/12, 55PFL8007T/12, 60PFL9607S/12, 60PFL9607T/12.
FIRMWARE FOR SPI 42PFL6907T/12 SSB 310431365664
The appearance of MainBoard 310431365554 is shown in the figure below:310431365554
310431365554 can be used in TVs:
PHILIPS 40PFL7007T/12 (Panel LTA400HL15 code 003), PHILIPS 42PFL6907T/12 (Panel LC420EUF-PEF1 code 413), PHILIPS 46PFL8007T/12 (Panel LTA460HQ17 (SMGK) B p/n: 932229485682), PHILIPS 47PFL6907T/12 (Panel LC470EUF PEF1 code 414), PHILIPS 55PFL8007T/12 (Panel LTA550HQ19 code 325 p/n: 932229486682), PHILIPS 46PFL7007T/12 46PFL7007K/12 (Panel LTA460HQ17 ), PHILIPS 40PFL8007T/12 (Panel LTA400HL15), PHILIPS 46PFL9707T/12 (Panel LK460DL), PHILIPS 55PFL7007T/12 (Panel LTA550HQ19).
PSU Advanced
The 42PFL6907T / 12 model uses the FSP145-4FS01 power supply unit using the PFC (Power Factor Correction) node - an active filter of the highest harmonics of the current consumption. In fact, it is a boost converter based on the FAN7930C PWM controller, which eliminates the charge current of the rectifier filter's electrolytic capacitor directly from the network through 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 42PFL6907T device:
Installed matrix (LED panel) LC420EUF-PEF1 code 413.
To power the backlight LEDs, a converter is used, combined with a power supply, controlled by a BD9479FV PWM controller.
The necessary supply voltages for all nodes of the PHILIPS 42PFL6907T TV are generated by the FSP145-4FS01 power supply module or its analogs using the FSB117H (Standby 8pin), FAN7930C (PFC), SSC9522S (PWM resonant) microcircuits.
MainBoard - the main board (motherboard) is a module 310431365554, using microcircuits 29F8G08ABABA, SII9387ACTUC, D2834ER, TAS5731 // FNP102-B2E31 and others.
The SUT-RE214AN H 2H069E tuner provides television reception and channel tuning.
Additional technical information about the panel:
Brand: LG Display
Model: LC420EUF-PEF1
Type: a-Si TFT-LCD, Panel
Diagonal size: 42 inch
Resolution: 1920x1080, FHD
Display Mode: IPS, Normally Black, Transmissive
Active Area: 930.24x523.26 mm
Surface: Antiglare (Haze 1%), Hard coating (2H)
Brightness: 400 cd / m²
Contrast Ratio: 1600: 1
Display Colors: 16.7M / 1.06B (8-bit / 8-bit + Dithering), CIE1931 72%
Response Time: 5 (G to G); 8 (MPRT)
Frequency: 120Hz
Lamp Type: WLED Without Driver
Signal Interface: LVDS (4 ch, 8/10-bit), 92 pins
Voltage: 12.0V