Technical description and composition of the PHILIPS 40PFL8664H TV, type of panel and applicable modules. The composition of the modules.PHILIPS LED
Model: 40PFL8664H / 12
Chassis / Version: Q548.1E LB
Panel: LK400D3LA43 code 225
LED driver (backlight): integrated into PSU; 68V 632 mA
PWM LED driver: 3843
MOSFET LED driver: AOD454
Power Supply (PSU): FSP202-5F01, FSP202-5F01 (PSU2)
PWM Power: PWM 8 pin SMD
MainBoard: 313926866791
IC MainBoard: PNX85433EH / M2A, EDE1116AEBG, NAND01GW3B2, M25P05, M24C64, TDA9996, TPA3123D
Tuner: HD1816AF
Specifications 40PFL8664H
PHILIPS 40PFL8664H
General repair guidelines for TV LCD LED
In the case when the 40PFL8664H does not turn on, does not respond to the remote control and buttons on the front panel, does not blink bulbs and does not show any signs of operability, the power supply module FSP202-5F01, FSP202-5F01 (PSU2) is probably faulty in this case. When diagnosing and repairing the power supply, after replacing the swollen capacitors of the secondary rectifier filters (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.
It should be remembered that in the practice of repair, usually the power switches in switching power supplies (SMPS) do not fail due to their poor quality and, in such cases, it is necessary to look for the cause that led to a malfunction and provoked a breakdown of the key. Most often, the culprits of the accident are dried electrolytic capacitors or dangling resistors in the primary circuit, or the PWM 8 pin SMD PWM controller chip itself may be faulty. It is also necessary to check all the semiconductor elements of the stabilization circuit in the primary and secondary circuits.
Sometimes the PHILIPS 40PFL8664H TV does not have an image, but there is sound, or the image appears and immediately disappears. In this case, there is a possibility of a malfunction of the LED driver - the power converter for the backlight LEDs of the LK400D3LA43 panel (code 225), or a break in the LED circuit is possible. In such cases, first of all, it is necessary to verify the operability of the electrolytic capacitors of the filter by the power of the backlight unit.
The lack of backlight often occurs due to an open circuit in the LED circuit. There is a need for disassembling the panel and checking the LEDs themselves, as well as the same contact connections in the connectors and rations of the terminals.
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. Having disassembled the panel, it is necessary to check each LED separately. Chinese multimeters, as a rule, light up a single 3-volt LED in the forward direction. In the case of using dual 6-volt LEDs, the PN junction of its protective zener diode can serve as a health indicator. In faulty LEDs, the zener diode will either be cut off or broken into short-circuit.
Repair or diagnostics of the motherboard 313926866791 should begin by checking the stabilizers and power converters needed to power the microcircuit and matrix. 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) - PNX85433EH / M2A, EDE1116AEBG, NAND01GW3B2, M25P05, M24C64, TDA9996, TPA3123D. In cases where the BGA processor is used, its malfunction is usually detected by the local heating method.
The malfunction of the HD1816AF tuner is established after checking the software and all the supply voltages at its terminals. The data exchange of the tuner with the processor via the I2C bus can be controlled by an oscilloscope.
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 sсhematic diagram 40PFL8664H/12 Chassis Q548.1E LB
Main features of the PHILIPS 40PFL8664H device:Installed matrix (LED panel) LK400D3LA43 code 225.
To power the backlight LEDs, a converter is used, combined with a power supply unit, controlled by a 3843 PWM controller. AOD454 type keys are used as power elements of the LED driver.
The necessary supply voltages for all nodes of the PHILIPS 40PFL8664H TV are generated by the FSP202-5F01 power module, or its analogs using PWM 8 pin SMD microcircuits.
MainBoard - the main board (motherboard) is a module 313926866791, using chips PNX85433EH / M2A, EDE1116AEBG, NAND01GW3B2, M25P05, M24C64, TDA9996, TPA3123D and others.
The HD1816AF tuner provides television reception and channel tuning.
