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szervusztok
ennek a tv nek a javitasaban kernek segitseget
...kettot villan a LED ezt ismetli es nem kapcsol be
310431365554a main van a keszulekben
ennek a main board javitasaban kernek segitseget,itt a forumon kollega meg e tudja javitani
illetve mukodokepest lehet e vasarolni
koszonom

Sziasztok Adott egy Philips, 21pt1654 ,l9.2 e ,hibája készenléti led villog ,rendszerfeszültség rendben,sormeghajtó bf 422 nincs tápfesz,ha a tranzisztort kiveszem a táp megjelenik,pedig a tranyó jó /tettem másikat/valami vezérlési gondra gondolok,az ic tda8842 s1.Ha jól tudom ehelyett a tda8842 nem jó/nekem ez van/ Nem akarom megrendelni az s1 végűt addig még az áment rá nem mondjátok.Nem vagyok biztos abban,hogy az ic a rossz!A segítséget előre is köszönöm!!

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 
Philips 55PUH4900 típusú tv-hez keresek tápegységet. 
Csatolok képet, ha lenne valakinek jelezze kérem. 
Köszönöm Balázs