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PHILIPS 25PT4823-93S

TV - EPROM
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TV
EPROM
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    PHILIPS 25 PT 482393 25PT4823 93S
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Relevant TV forum topics:
Philips 40PFL7007K/12 does not power on - Chassis QFU1.1E LA
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
Philips L6.3 probléma
Javitok egy Philips szerzeményt(tv-t)L6.3.as sasszival.A probléma a következő:Mutat néhány percet,aztán kikapcsol,vagy lefagy a vezérlés távirányitóról.Kikapcsolom,aztán ujra megy egy darabig.A kondikat cseréltem a tápban,de semmi változás.Az 5V megvan,de lehetséges,hogy a kikapcsolás pillanatában leesik az értéke.Máskülönben már voltak problémák ezzel a tipussal,sőt az L6.2-sel is ugyanugy.
Philips 28PT5007/58 Ch.:L01.1E hangerő probléma (megoldva).
Sziasztok! Ez TV sorvéghibával került hozzám, BU4508DX zárlatos volt. Cseréltem egy 2508DX-re plusz a C-E közötti impulzus kondit. A készülék most működik de a hang OSD szerint 0-23-ig néma, 24-en már van hang de itt már ordít. Mi lehet ez, eeprom hiba? Vagy a szerviz menüben lehet valami elállítva?
Philips 32pfl7762d/12 tv nem kapcsol be, hibakód: 112
Üdvözlet!
A napokban hoztak hozzám egy:
philips lc7.5e la
Model:32pfl7762d/12
Tv- t.
Az ügyfél elmondása alapján ķészenléti állapotban volt a tv,és keletkezett egy áram kimaradás miután a tv-t nem lehetett bekapcsolni.
A készenléti led sem világított.
A tv-t átvizsgálva  a tápegységben  egy 10 ohmos 1wattos ellenállás és egy 1.5nf 250vos kondenzátor volt elégve. 
Csere után a készenlét létrejött de a tv-t nem lehetett bekapcsolni távirányítóval sem.
Mert hibakódot jelzett a led.Az első piros led villanás hosszan kB 2mp ig tart utána kettő rövid villanás.Ez adja a hibakódot.
Hibakód:112, vagy csak 12..?
Kérem aki tud segítsen ebben ,hogy mit jelent ez a kód és hogyan lehene kitörölni hogy a tv működjön.
Köszönöm szépen 
Kasztner Károly 


 
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