Technical description and composition of the PHILIPS 42PFL4307T TV, type of panel and applicable modules. The composition of the modules.PHILIPS LED
Model: 42PFL4307T / 12
Chassis / Version: Q552.4E LA
Panel: LC420EUE (SE) (F2) code 411 p / n: 932229210682
LED backlight: 6922L-0016A, 6920L-0001C, 6916L0936A; R2S474 7F, 42 V12 Edge REV1.1 1
T-CON: 6870C-0401C
LED driver (backlight): integrated into PSU
PWM LED driver: OZ9909TN
Power Supply (PSU): PLDF-P104B HR-PSLS42-3-50Hz 272217190639
PWM Power: FSL106HR (Standby DIP-8), HS01G (PFC), L6599AD (PWM 16pin)
MOSFET Power: FDD8N50NZ
MainBoard: 313929716961 3139 123 65324 3139 123 65334 313929715701
IC MainBoard: RT8293AH (8),
Tuner: SUT-RE214AN
Control: 2422 549 90467
Specifications 42PFL4307T
PHILIPS 42PFL4307T
General repair guidelines for TV LCD LED
Repair of the PHILIPS 42PFL4307T / 12 TV should begin with a careful external examination of all its components and modules. 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. Swollen electrolytic or cermet capacitors, charred resistors, ring cracks in the soldered terminals of the elements - all this can significantly help the master to determine the causes and consequences of the malfunction of the TV.
If the 42PFL4307T TV does not turn on, does not make any sounds when it is turned on, and also no indicators on the front panel light or blink, there is a high probability of a malfunction in the power module. In some cases, only the regulator or power converter of the control processor may be faulty, which is typical for some PHILIPS models. When diagnosing and repairing the power supply, after replacing the swollen capacitors of the filters of the secondary rectifiers (if any), you must first check the mains fuse. When it is broken, the power elements of transistors and rectifier bridge diodes should be checked for avalanche (thermal) breakdown.
As a rule, the keys in switching power supplies (SMPS) are reliable enough and rarely fail for no reason to be looked for by checking other components of the circuit - electrolytic capacitors, resistors and semiconductor elements of the primary circuit. The PWM chip is verified by replacing it with a known good one.
If the PHILIPS 42PFL4307T does not have an image, but there is sound and the TV is controlled by the remote control, there may be a malfunction in the backlight circuits of the LC420EUE (SE) (F2) panel code 411 932229210682. The LEDs or the power converter - LED driver may be malfunctioning. Often in such cases, when you turn on the TV, an image appears and immediately disappears. First of all, it is necessary to verify the operability of the electrolytic capacitors of the rectifier filter supplying the LED driver, and check the LEDs, connecting obviously known good diagnostics.
Often there is a need for disassembling the panel to check the health of the LEDs, as well as contact connections in the connectors and soldering.
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.
Repair or diagnostics of the motherboard 313929715701 should begin by checking the stabilizers or power converters of its microcircuits. If necessary, you should update the software (software).
In some cases, it is necessary to check or replace (if necessary) the elements of the MB board (SSB) - RT8293AH (8),. In cases where the BGA processor is used, its malfunction is usually detected by local heating.
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 42PFL4307T/12 Chassis Q552.4E LA
The appearance of MainBoard 313929716961 is shown in the figure below:3139 123 65324, 3139 123 65334
313929716961
313929716961 can be used in TVs:
PHILIPS 32PFL4007T/60 (Panel T320HVN01.5 code 408), PHILIPS 32PFL5007T/60 (Panel LTA320HW02 001 code 395), PHILIPS 32PFL5507T/60 (Panel LTA320HW02 code 395 p/n: 932229091682), PHILIPS 40PFL5507T/60 (Panel LTA400HV04 001 code 396 p/n: 932229092682 ), PHILIPS 40PFL5527T/60 (Panel LTA400HV04 001 code 396 p/n: 932229092682), PHILIPS 42PFL4307T/12 (Panel LC420EUE (SE)(F2) code 411 p/n: 932229210682), PHILIPS 46PFL5507T/60 (Panel LTA460HW04 001 code 397), PHILIPS 47PFL4007T/60 (Panel LC470EUE SEM2 code 349 p/n: 932228892682).
PSU Advanced
The 42PFL4307T / 12 TV is equipped with a PLDF-P104B power supply module using the PFC (Power Factor Correction) scheme acting as an active filter to eliminate the higher harmonic components of the current consumption. The step-up converter based on the HS01G PWM controller does not allow the electrolytic capacitor of the input rectifier filter to be connected directly to the network directly through open diodes, when the reactance (about 15-30 ohms at a frequency of 50 Hz) determines the charge current. 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
Main features of the PHILIPS 42PFL4307T device:
Installed matrix (LED panel) LC420EUE (SE) (F2) code 411 p / n: 932229210682.
The matrix control uses the Timing Controller (T-CON) 6870C-0401C.
To power the backlight LEDs, a converter is used, combined with a power supply, controlled by the OZ9909TN PWM controller.
The necessary supply voltages for all nodes of the PHILIPS 42PFL4307T TV are generated by the PLDF-P104B power supply module or its analogs using the FSL106HR (Standby DIP-8), HS01G (PFC), L6599AD (PWM 16pin) microcircuits and power switches of the FDD8N50NZ type.
MainBoard - the main board (motherboard) is a module 313929716961, using chips RT8293AH (8), and others.
The SUT-RE214AN tuner provides TV reception and channel tuning.