Technical description and composition of the PHILIPS 46PFL8606T TV, type of panel and applicable modules. The composition of the modules.PHILIPS LED
Model: 46PFL8606T / 12
Chassis / Version: Q551.2E LA
Panel: LK460D3LB43 (SRPJ) B
T-CON: E222034
LED driver (backlight): integrated into PSU
PWM LED driver: BD9276EFV
Power Supply (PSU): FSP158-5FS01
PWM Power: STRA6069H
MainBoard: 310431365372
IC MainBoard: PNX85500, TPA3123D2PWP
Tuner: TC90517FG
Specifications 46PFL8606T
PHILIPS 46PFL8606T
General repair guidelines for TV LCD LED
Possible malfunctions
- The PHILIPS 46PFL8606T does not turn on. There are no signs of operability. The indicators on the front panel do not light or flash, the TV does not respond to the remote control and control buttons.
Most likely in this case, the main switching power supply (IIPS) FSP158-5FS01 is faulty. It is necessary to measure its output voltages, and in case of their absence, check the operability of the power switches of the converters and rectifier diodes for the probability of a short circuit.
In case of diode breakdowns in the secondary circuits, the converter can operate in emergency short-circuit mode without output voltages, and during short circuit in the power elements of the primary circuit, the mains fuse and / or current sensor at the source of the key usually breaks.
Mos-Fet power switches, used in switching power supplies, sometimes fail due to a malfunction of any other elements that can put it out of operation in key mode or create an excess of the maximum permissible parameters of the switch. These can be elements supplying the PWM controller, frequency-setting or damping circuits, or negative feedback elements in the stabilization circuit. PWM controllers STRA6069H, in the absence of visible damage or obvious short-circuit between the terminals, are checked by replacing with new, or obviously working.
- There is no image, there is sound, it responds to the remote control. Or the image may appear for a second when turned on and immediately disappears.
A malfunction is usually most likely in these cases at the backlight nodes of the display matrix. The reason for this may be a break in the LED circuit, or a problem in stabilizing their power supply.
It is impossible to check the line of series-connected LEDs without a special current source, and for this purpose it is not safe to use any voltage sources above 12V for them. Then it remains only to open the panel and check each LED separately. Usually, Chinese 9V-powered multimeters light up a single 3-volt LED, if you connect the probes in the forward direction, the red probe to the anode, and the black to the cathode. In dual 6-volt LEDs, the PN junction of its emergency zener diode can serve as an indicator of health. In the event of a LED malfunction, its zener diode will either be cut off or broken into short-circuit.
- The TV does not turn on, does not respond to the remote control. The indicator blinks or signals standby mode.
Repair or diagnostics of the 310432866731 motherboard should begin by checking the stabilizers and power converters needed to power the microcircuit and matrix. If necessary, update or replace the software (software). Sometimes they require checking or replacing (if necessary) the elements of the MainBoard board - PNX85500, TPA3123D2PWP. In cases where the BGA processor is used, its malfunction is usually detected by the local heating method.
The malfunction of the tuner TC90517FG 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.
We recommend the owners of the 46PFL8606T TV for repair only to qualified specialists with the necessary work experience! Self-repair attempts without the appropriate knowledge and skills can lead to irreversible negative consequences!
Service manual and schematic diagram 46PFL8606T/12 Chassis Q551.2E LA
The appearance of MainBoard 310431365372 is shown in the figure below:310431365372
Main features of the PHILIPS 46PFL8606T device:
Installed matrix (LED panel) LK460D3LB43 (SRPJ) B.
In matrix management, the Timing Controller (T-CON) E222034 is used.
To power the backlight LEDs, a converter is used, combined with a power supply unit, controlled by the BD9276EFV PWM controller.
The necessary supply voltages for all nodes of the PHILIPS 46PFL8606T TV are generated by the FSP158-5FS01 power module, or its analogs using STRA6069H microcircuits.
MainBoard - the main board (motherboard) is a module 310431365372, using chips PNX85500, TPA3123D2PWP and others.
The TC90517FG tuner provides TV reception and channel tuning.