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PHILIPS LC4.9EAA 312278515433 LG

TV - SERVICE MANUAL
Type: (PDF)
Size
23.1 MB
Page
110
Category
TV
SERVICE MANUAL
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    PHILIPS LC-4.-9EAA LC4.9EAA LG LC EAA
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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 14AA3322/10B Anubis A , a kép alja felvan csúszva!
Sziasztok! Most hozták ezt a tvét azzal a hibával, hogy a kép alja fekete. Bekapcsolva a hiba fent áll, de pár perc után szépen kimegy teljes képre. Az eltérítő ic ( TDA3653B ) mellett minden elkot kicseréltem, de csak annyival javult a helyzet hogy fél perc alatt beáll. Másik icével is ugyan ezt csinálja, mi lehet a gond félvezető, smd kondi?
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Sziasztok! A fent nevezett TV hiba jelensége a következő: A tápfeszültség dugó bedugásakor a készenléti led vagy bekapcsol vagy nem...4-5 próba után bekapcsol / elvileg van készenlét /. De a távirányító vagy a bekapcsoló pöcök megnyomása után elalszik, vagy nem reagál semmire sem. Ilyenkor újra tápfesz kihúz, majd bedug...a led világit, a távirányítóra beindul és tökéletesen működik, amíg ki nem kapcsolom. Kikapcsolás után újra ezt a folyamatot kell eljátszani...jó párszor. A készülékben 17MB62 Westel panel van.Képeket mellékeltem a panelról. Köszi a segítséget! SJózsi Hjoco ötletét fogadtam meg miszerint flash hiba lehet. Rendeltem egy CH341A programozót és egy programozó csipeszt.Az alaplapon u158 jelöléssel van egy MX25L512 eeprom. Lementettem az adatokat... töröltem majd újraírtam. A TV tökéletesen működik. Az alaplap típusa: 17MB62-2.6 /V089H MB62 /
Philips chassis GR2.1 AA folyamatosan villog zolden a LED
szervusztok az a helyzet ezzel a GR2.1 AA sasszival,hogy bekapcsolas utan a LED zolden villog,a sorvegfok tehat bekapcsol-kikapcsol,taktusban a villogassal,ekozben meg raszter reszleteket is latni,es az egesz feszultsgek ugrandoznak,nem melegszik semmi, -sortranzisztor ki,izzora a tap indul,folyamatosan termeli a 148volt feszultsget,a sormeghajto negyszog impulzus rendben,stabil, ...elsore cserelnem az FBT,de sajna nincs, ezen kivul masik hibaforras is lehet?
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