Technical description and composition of the PHILIPS 42PFL7008S TV, panel type and applicable modules. The composition of the modules.PHILIPS LED
Model: 42PFL7008S / 60
Chassis / Version: QFU1.2E LA
Panel: LC420EUF (AF) (F1) // LC420EUF (PF) (F1)
LED backlight: 6922L-0072A
T-CON: 6870C-0450A
LED driver (backlight): integrated into PSU
PWM LED driver: BD9479FV
Power Supply (PSU): FSP140-4FS01
PWM Power: SSC9522S (PWM 18pin), FAN7930C (PFC), FSB117HNY (B117H-Standby)
MainBoard: 310431366185 310432880941 310430354945 3104 313 66185
IC MainBoard: FUSION120, H5TQ2G63BFR, H5TQ2G83BFR, TAS5731P1
Tuner: SUT-RE214AN
Control: 8WUSN28P.2A1G, GWA7.820.764-1
Specifications 42PFL7008S
PHILIPS 42PFL7008S
General repair guidelines for TV LCD LED
Possible malfunctions
- PHILIPS 42PFL7008S does not turn on, the indicators on the front panel do not light or flash. The TV does not respond to the control buttons and the remote control.
Most often, with such manifestations, the FSP140-4FS01 main power module is found to be faulty. It is necessary to measure its secondary output voltage, and in case of their absence, check the serviceability of the power switches of the converters and rectifier diodes for a short circuit.
In case of breakdowns in the secondary circuits, the converter can operate in a short circuit mode, and during a short circuit in the elements of the primary circuit, the mains fuse usually breaks.
Mos-Fet keys used in switching power supplies usually fail due to a malfunction of other elements that can put it out of operation in key mode or provoke an excess of the maximum current or voltage. It can be supply, damper circuits, or elements of OOS (negative feedback) stabilization. The reason for the breakdown of the power key can be PWM (PWM) SSC9522S (PWM 18pin), FAN7930C (PFC), FSB117HNY (B117H-Standby). It is checked only by replacement with a known good one.
- There is no image, but there is sound and reaction to commands from the remote control. Or the image appears immediately after turning on and disappears.
In most of these cases, a malfunction is detected in the nodes and backlight elements of the LED panel. The reason for this may be a break in the LED circuit, or a problem in stabilizing their power supply.
To check the LED strips, to open all the transitions of the LEDs, several tens of volts or more are needed, it is best to use a current source for such purposes. The breakage of several PN junctions connected in series cannot be detected with a multimeter or tester. In such cases, it is necessary to open the panel and check each LED. If your multimeter cannot open the LED transitions in forward bias, you can sometimes detect the presence of a PN junction of the protective zener diode by connecting the probes in the opposite direction. If the zener diode is broken or broken in short-circuit, then the LED is faulty and needs to be replaced.
- The indicator blinks or lights constantly, the TV does not turn on, does not respond to the remote control.
Repair or diagnostics of the motherboard 310431366185 should begin by checking the stabilizers and power converters needed to power the microcircuit and matrix. If necessary, update or replace the software (software). Complex repair of MB (SSB) is possible only in the conditions of a service center with the necessary equipment. Checking or replacing elements FUSION120, H5TQ2G63BFR, H5TQ2G83BFR, TAS5731P1 requires the necessary training and professional skills in repairing modules at the component level. Problems associated with the use of BGA soldering technologies can sometimes be diagnosed by warming up.
In the absence of tuning to the channels of on-air or cable television, you should make sure that the software is correct, as well as in accordance with the ratings of the supply voltages at the terminals of the SUT-RE214AN tuner. It is also necessary to check the presence of pulses of data exchange between the tuner and the processor via the I2C bus using an oscilloscope.
It should be remembered! Attempts to independently repair the PHILIPS 42PFL7008S TV, in the absence of the necessary qualifications and experience, are categorically not recommended and are fraught with negative consequences, up to the complete non-serviceability of the device!
Service manual and schematic diagram 42PFL7008S/60 Chassis QFU1.2E LA
CHASSIS QFU1.2E LA FOR MODELS OF TV PHILIPS:
40PFL8008K, 40PFL8008S
42PFL6008H, 42PFL6008K, 42PFL6008S, 42PFL6158K, 42PFL6158S, 42PFL6188K, 42PFL6188S, 42PFL6198K, 42PFL6678K, 42PFL6678S, 42PFL7008H, 42PFL7008K, 42PFL7008S, 42PFL7008T, 42PFL7108H, 42PFL7108K, 42PFL7108S, 42PFL7108T 46PDL8908S, 46PFL8008K
47PFL6008H, 47PFL6008K, 47PFL6008S, 47PFL6158K, 47PFL6158S, 47PFL6188K, 47PFL6188S, 47PFL6198K, 47PFL6678K, 47PFL6678S, 47PFL7008H, 47PFL7008K, 47PFL7008S, 47PFL7108H, 47PFL7108K, 47PFL7108S
55PDL8908D, 55PDL8908S, 55PDL8908S, 55PFL6008H, 55PFL6008K, 55PFL6008S, 55PFL6008T, 55PFL6158K, 55PFL6158S, 55PFL6188K, 55PFL6188S, 55PFL6198K, 55PFL6678K, 55PFL6678S, 55PFL7008H, 55PFL7008K, 55PFL7008S, 55PFL7108H, 55PFL7108K, 55PFL7108S, 55PFL8008K, 55PFL8008S
60PFL6008H, 60PFL6008K, 60PFL6008S, 60PFL8708S
65PFL9708S
84PFL9708, 84PFL9708S
The weak point in these TV models is the main (motherboard) SSB, which usually refuses to work after two years of operation. Replacement required.
The cost of the board is quite high, which sometimes raises the question of the feasibility of repairs.
Despite all the efforts of designers to complicate or exclude the possibility of repairing the board, there are still options for its restoration.
The appearance of MainBoard 310431366185 is shown in the figure below:
310431366185
The weak point in the PHILIPS TV models assembled on the QFU1.2E LA chassis is the main board SSB (MainBoard), which usually refuses to work after two years of operation. Replacement required.
The cost of the board is quite high, which sometimes raises the question of the feasibility of repairs.
Despite the efforts of designers to complicate or exclude the possibility of repairing the board, there are still options for its restoration.
Attention to the masters !!! You should pay attention to the drop of compound from the bottom of the board. When trying to heat the board or reball of BGA chips, the compound must be completely removed. Otherwise, the paths will be closed, which will significantly complicate the further repair of the board.
310431366185 can be used in TVs:
PHILIPS 42PFL7008S/60 (Panel LC420EUF (AF)(F1)), PHILIPS 40PFL8008S/60 (Panel LTA400HL18 002), PHILIPS 42PFL6008S/60 (Panel LC420EUF (PF)(F1)), PHILIPS 42PFL7108S/60 (Panel LC420EUF PFF1), PHILIPS 47PFL6008S/60 (Panel LC470EUF (PF)(F1) code 430 p/n: 932230114682), PHILIPS 47PFL6008S/60 (Panel LC470EUF (PF)(F1) code 430 p/n: 932230114682), PHILIPS 47PFL7008S/60 (Panel LC470EUF PFF1 code 430 932230114682), PHILIPS 60PFL6008S/60 (Panel LC600EUD FEF2 code 439 p/n: 932230207682), PHILIPS 55PFL8008S/12 (Panel LTA550HQ25), PHILIPS 55PFL7108S/60 (Panel LC550EUF (PF)(F1)), PHILIPS 42PFL6678S/12 (Panel LC420EUF (PF)(F1)).
PSU Advanced
On the 42PFL7008S / 60 TV, the FSP140-4FS01 power module is installed using the PFC (Power Factor Correction) scheme acting as an active filter to eliminate the higher harmonic components of the current consumption. The boost converter based on the FAN7930C PWM controller does not allow the input rectifier filter's electrolytic capacitor to be connected directly to the network directly through open diodes, when the value of the charge current determines its reactance (about 15-30 ohms at a frequency of 50 Hz). As a result of the conversion, the charging current of the capacitor will be determined in such a way that the envelope of the high-frequency pulses of the input current will repeat the phase and shape of the sine wave of the input voltage. The health check of the PFC unit is carried out by measuring the DC voltage on the capacitor of the rectifier network. In operating mode, it should be around 380V, in standby approximately 300V.
The appearance of the power supply
Key Features of PHILIPS 42PFL7008S:
Installed matrix (LED-panel) LC420EUF (AF) (F1) or LC420EUF (PF) (F1).
The matrix control uses the Timing Controller (T-CON) 6870C-0450A.
To power the backlight LEDs, a converter is used, combined with the power supply, controlled by the BD9479FV PWM controller.
The required supply voltages for all nodes of the PHILIPS 42PFL7008S TV are generated by the FSP140-4FS01 power supply module or its analogs using SSC9522S (PWM 18pin), FAN7930C (PFC), FSB117HNY (B117H-Standby) microcircuits.
MainBoard - the main board (motherboard) is a module 310431366185, using chips FUSION120, H5TQ2G63BFR, H5TQ2G83BFR, TAS5731P1 and others.
The SUT-RE214AN tuner provides TV reception and channel tuning.
