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PHILIPS 29PT656A-78R 29PT856A-78R 34PT786A-78R CHASSIS A10 SM

TV - SERVICE MANUAL
Type: (PDF)
Size
31.7 MB
Page
129
Category
TV
SERVICE MANUAL
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  • Also known:
    PHILIPS CHASSIS A-10 A10 29 PT 656 78 856 34 786 10 29PT656A 78R 29PT856A 34PT786A
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  • See related repair forum topics below. May be help you to repair.
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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 42pfl9703d szerviz uart használata
Sziasztok! Van egy 42pfl9703d lcd tv,hogyan kell használni a szerviz UART csatlakozót?
Philips SL01.2E induláskor leáll
Sziasztok! Adott egy Philips 51cm-es tévé,amelyben SL01.2E sasszé lakozik. Az lenne a baja,hogy induláskor,kb 3szor leáll standby módba,ekkor távval újra indítható,majd megint leáll,kb 4-5ször eljátsza,de mire bemelegszik már jól működik.Feszültségek rendben vannak,pupos rossz kondit szemre nem találtam.A tápfeszültség stabil,hidegen melegen egyaránt. Mi lehet a gond??? Köszi előre is mindenkinek!
PHILIPS 28PW6006 S: L01.1E Tv Bekapcsoláskor kb. 10-60 mp-ig megy, aztán kikapcsol.
Sziasztok! A fent említett készülék bekapcsolása után kb. 10-60 másodperc után st/by -ba megy. Amíg működik, a feszültségek rendben, a kép stabil és szép. Kikapcsolás előtt talán kicsit pirosba hajlik. Kondenzátorok átnézve, gyenge ESR értékűek cserélve. A képcső panelon 2,2nF/3Kv cserélve. Égésre, vagy melegedésre utaló nyomot nem látok. Fólia oldal is jónak tűnik, gyanús helyek átforrasztva. Hála a tanyának, van egy gyanúsított, az IC7471 (TDA8359J), de biztosra kéne menni, mielőtt cserélem. Valakinek tippje esetleg? Mi okozhat még ilyen hibát? Minden segítséget köszönök. Szép estét! Andris
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