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PHILIPS 25PT4501

TV - EPROM
Type: (RAR)
Size
266.0byte
Page
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Category
TV
EPROM
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    PHILIPS 25PT4501 25 PT 4501
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Relevant TV forum topics:
PHILIPS 42PFL7662/12 kép nincs, hang van
Sziasztok. Nem érdekel senkit a címben szereplő meghibásodott LCD Tv? Kép nincs hang van. Javítva volt már, processzorra 2 hó gari. vagy ha tudtok segíteni a javításban az is érdekelne. kopi
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 plazma TV tip.: 42pfp5532D-05 zajos a kép
Adott a fent nevezett plazma tv. A belseje nagyrészt SAMSUNG. Dolgoztam vele már eleget . Először a tápot raktam rendbe, egy előző topikban írtam róla, szekunder kondik cserélve pfc..... Aztán az Y boardon találtam két zárlatos IGBT-t, kicseréltem a meghajtó drivereivel együtt. Most már van kép, de nagyon zajos. Először azt hittem a SCART analóg bemenetén szedi össze , de nem . Meghajtottam HDMI- vel, most ugyanaz. Elsősorban a világos és fehér képtartalmak a problémásak, olyan a képe mint mikor beindul a hangyaboly. Hol keressem a megoldást tovább , mit gondoltok ?
Philips ch.: Q551.1 LE 40 colos LCD T-con hiba?
Kérem SobriJ, és kozakg, ne szóljon a topic -hoz!
Sziasztok!
Lenne ez a gép. Azt csinálja, elindul semmi kép,csak a háttér. 9 villog, majd megint 9 és a 10-re égve marad a stby led, majd újra indul, és ezt ismételgeti Egy nagy Sharp Tcon van benne. Itt találtam egy leírást, azt a két SO8 FET-et cseréltem, de nem hatotta meg .
Van valakinek tapasztalata mi lehet még?
https://alpengeist-tvrepair.blogspot.com/2015/06/philips-40pfl9715k-9-blinks-tcon-board.html

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