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Hi. I have a Philips 42PFL9803H/10 TV that won't turn on. When I power up I hear 2 relay cliking and the LED is blinking 2 time then pause 3 sek, blink 2 time etc. If have only 3.3v Standby Voltage on PSU. I have downloaded SM for this TV set, but the circuit is only for 37" TV, so is there someone that have the SM for the 42" set? /Jens

Tisztelt Kollégák! Vettem a Vaterán egy Philips DSR 4101 UPC beltérit.Tulaj szerint jó volt,két éve nem használta.Működő rendszerbe próbáltam bele,jelenség: "Nincs antennajel" üzenet.Távtáp 18 volt megvan.Gyári beállítások menüpontot lefuttatva ugyanaz,semmi jel.Látszólag hangol,lehet paraméterezni,de csatornát nem talál.Van e ezen RESET lehetőség,vagy szoftver újratelepítés a megoldás? Köszönöm a segítséget!

Hi everybody, I have Philips 40PFL7007K/12 on repair. TV does not start up. I have checked the PSU and it seams to be OK. There seam to be problem on the main board. What I have tried… Well, there is +3V3-STANDBY coming from PSU to main board. This feeds up the main processor. This voltage has also been used to switch TV on. I have checked that switching signal from POWER ON button goes back to main board. But I did not check this whole path towards the processor as it is BGA package and it is covered by ceramic cooling plate. And here comes what is not clear to me. 1. How to check if the main processor works? Does it work on the +3V3-STANDBY when TV is is standby mode? 2. Can I somehow check if the PSU is working? May be by activating some pin? 3. I have noticed by measuring (ohm-meter) some capacitors on the main board (in circles on the picture) that there is very low resistance on them (4.5ohms). In the scheme it is shown that these capacitors are on the 1V5 (1.5V) line. Is this OK? Basically it does not give much current as I = 1V5 / 4R5 = 333mAmps. What do you think? Certainly there are low voltage data parts (RAM. Processor …) connected and such resistivity might be correct….?.... What I have also find that this 1V5 is split into 1V5M0 and 1V5M1. See the picture. I have removed the coils and measured resistance. Then 1V5M0 shows about 15ohms and 1V5M1 shows about 6,5ohms. The service manual is on this link: http://elektrotanya.com/philips_ch.qfu1.1e_la.pdf/download.html Thanks Martin

Sziasztok ! A sorvég és a táp felélesztése után kiderült, hogy az EW- korrektor FET is kuka. Ha beleteszek egy újat, egyszerűen nem éled fel a táp,ha kiveszem korrekció nélkül elindul minden. Nem tudom mennyire befolyásolja a táp terhelhetőségét, de nem volt itthon P4NA40FI, helyette FQPF6N60 került bele, a 7421 pedig 2SC2120 lett. Minden segítséget köszönettel várok.