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Sziasztok! A sorvég környékén ellenőriztem a félvezetőket, kondikat. Indítás után elhalványul a stby LED, majd indul a sorvég és a függ.eltérítés is, utána 5-6s után letilt a sormeghajtás,de a stby LED marad halvány. A sortáp 130V (a rajzon 140), viszont a sortrafó után pl: a video végfok tápja csak 100V körül van, pedig nem terheli semmi. Ezek után sortrafóra gyanakszom, de várom a véleményeket hátha tévedek :hmmm:

Kedves Kollégák! Ez az 5 éves lcd 4-5 perc után becsíkozódik, mintha a sorfreki elmászna, majd a kép-hang is elmegy. A kék háttér és osd marad. Ha a jelfeldolgozó proci hátoldalát hűtöm a panel ellenkező oldalán, kb 10-15 percig vissza tudom csalogatni a képet. Smd-k egyenkénti hűtése nem hoz eredményt.A proc hűtésre nem reagál. Lehet elengedett valamelyik furatgalván forrasztása? Esetleg lehet-e szerezni control boardot valahol? Köszi, üdv, kovácsa

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

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