Technical description and composition of the PHILIPS 52PFL8605D TV, type of panel and applicable modules. The composition of the modules.PHILIPS LED
Model: 52PFL8605D / 77
Chassis / Version: Q552.1A LA
Panel: 52 inch
Power Supply (PSU): PLDJ-P978A
MainBoard: 310431363643 3104 313 63643
IC MainBoard: PNX85500, LD1117DT25, LAN8710A-EZKH, SII9287B, USB2513B, LM75BDP, TPA3120D2PWP, TPS53126PW, ST1S10PH.
Tuner: TH2603
Specifications 52PFL8605K
PHILIPS 52PFL8605D
General repair guidelines for TV LCD LED
Repair and diagnostics of any electronic device, in particular PHILIPS 52PFL8605D / 77, it is advisable to start with a careful external examination of internal and external elements. Visible damage to the elements can sometimes indicate the direction of the search for the defect even before the necessary measurements. If charred resistors, swollen electrolytic or cermet capacitors, ring cracks in the solders of the terminals of transformers or heating elements are found, it is advisable to establish the causes and consequences of the malfunction that has arisen, as well as to check the connected elements and assemblies.
Sometimes the PHILIPS 52PFL8605D TV simply does not turn on. No control lights on the front panel are lit or blinking, the TV does not respond to the remote control and does not make any sounds or any signs of life when turned on. The most likely cause of the malfunction is a failure of the common power module. If it is working properly, you need to check the processor batteries on the SSB (Main Board). When repairing the power supply, it is advisable to start the diagnostics by checking the mains fuse and the electrolytic capacitors of the filters of the converter secondary rectifiers. In the event of a fuse breaking, the reason should be sought in the power semiconductor elements of the pulse converter of the main power supply. First of all, it is necessary to check the diodes of the bridge of the rectifier of the mains voltage and the power switch (s) of the converter.
In most cases, key breakdowns in switching power supplies (SMPS) do not occur for no reason and you should look for other faulty circuit elements that could provoke a defect. This can be dried electrolytic capacitors in the primary circuit, and faulty damper elements, as well as dangling resistors or punched semiconductor elements in the stabilization circuits. Possible defective PWM chip from the manufacturer.
If the PHILIPS 52PFL8605D does not have an image, but there is sound and the TV is controlled from the remote control, a malfunction in the backlight circuits of the panel is likely. The LEDs or the power converter - LED driver may be faulty. 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.
To check the health of the LEDs and contact connections in their power 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.
Often, the MB (SSB) card must be replaced in case of complex malfunctions that are difficult to detect. When trying to repair, you should check its elements - PNX85500, LD1117DT25, LAN8710A-EZKH, SII9287B, USB2513B, LM75BDP, TPA3120D2PWP, TPS53126PW, ST1S10PH. and replace failed chips with new ones. Some malfunctions may be due to the use of BGA soldering technologies in modern Main Board technologies. Typically, such defects are detected by local heating of the chip.
Owners and users of the PHILIPS 52PFL8605D TV must remember that self-repair without special knowledge, skills and qualifications can be fraught with negative consequences that can lead to complete non-repairability of the device!
Service manual and schematic diagram 52PFL8605D/77 Chassis Q552.1A LA
The appearance of MainBoard 310431363643 is shown in the figure below:
310431363643
The appearance of the power supply
Main features of the PHILIPS 52PFL8605D device:
Installed matrix (LED-panel) 52 inches.
The necessary supply voltages for all nodes of the PHILIPS 52PFL8605D TV are generated by the PLDJ-P978A power supply module or its analogs.
MainBoard - the main board (motherboard) is a module 310431363643, using chips PNX85500, LD1117DT25, LAN8710A-EZKH, SII9287B, USB2513B, LM75BDP, TPA3120D2PWP, TPS53126PW, ST1S10PH. and others.
The TH2603 tuner provides TV reception and channel tuning.
