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TVs

PHILLIPS TV SHUT OFF AT 5 SG MODEL 21pt4136 / 55 chassis sl03.2

William E

hace 6 años

hace 6 años

good morning I have a tv with this fault I turn it on all normal but after 5 seconds the MODEL is turned off is phillips 21pt4136 / 55 chassis sl03.2 please thank you in advance for the collaboration thank you very much thank you

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nicomena2015

9.501

hace 6 años

hace 6 años

hello colleague: if you are a technician change the C2444 of 470mfx25v ... and see if it does not turn off ... if the fault persists you can have a somewhat exhausted tube ... in that case it would be necessary to do the test to increase the voltage of filament ... for that there is q, use an external source of 8v cc and then remove the cable from the heater q, it comes from the fli-bak..and energize the filamenros with the 8vcc of the source ... you can also give some three turns of insulated cable over the fli-bak core and then connect a cable of that coil to the socket of the tube socket and the other cable connects it where the heater was connected ... this is a momentary test to see if it is prob . exhausted tube ... then you can try to cancel the IK with the diodes that we all know ... note ... if you do not have knowledge in repairs of this type of TVs do not try to open the TV because inside there are very high and dangerous voltages for people without knowledge in electronics ... in this case make it look x by a qualified technician .. .Ok, greetings!!

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William E

hace 6 años

ok friend nico locate the C2444 which is 470 x 16 is seen in good condition in the same way I will change them to see if it works I am not technical as such but if I know some electronics and I think I can defend myself with some help of course thanks for the support friends I will be commenting

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William E

hace 6 años

Nico friend already proceeded to the replacement of the c2444 I placed 470 x 25 but still the same fault goes off after 5 seconds as I cancel the ik

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nicomena2015

9.501

hace 6 años

What, you got ... the 7200-TDA93XX ...

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nicomena2015

9.501

hace 6 años

this is an IK circuit for philips chassis L03-2L-AA ... comment if you understand the scheme ... below the link ...
https://ibb.co/BTGfDFk

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William E

hace 6 años

If Nico friend more or less I understand it is to place the diodes 1n4148 on pins 3619, 20, 21 and the 3 commons at 3624 or 6624 tell me not to be wrong please wait for your prompt response

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nicomena2015

9.501

hace 6 años

I asked you what. Will you give me the identification of the micro ... or jungle ... I asked you if it was the ADD 93XX ... since, in some models different jungles come ... if it is the TDA93xx there is that, join or weld the three cathodes together of diodes 1n4148 ... then the anode gives one diode solder it to the R3619 ... the other year of the other diode you solder it to the R3620 ... and the third year of the last diode you settle it to the R 3621 ... the union of the three cathodes welds them all together and goes to pin50 of the TDA93XX or jungle ... in this you can not go wrong ... or ... if you have questions ask ... comment if you understood ... .

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nicomena2015

9.501

hace 6 años

note: ... the cathodes of the diodes 1n4148 are identified xq, it has a band next to the diode ... where is the band that is the cathode ... the other end of the diode is the anode ... comments if you have it of course ... ok ... and comment on the microjungle number ,,,

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William E

hace 6 años

ok I understand what you tell me friend here attached the image and see what is pin 50

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Javier Chavez C

46.781

hace 6 años

hace 6 años

What voltage do you get in + B both in STAND BY and on the ON command. Check the good condition of the capacitors of this source. In the few seconds that you try to turn on, verify the presence of the working voltage in the vertical stage, if necessary check the good condition of the vertical and previous amplification transistors.

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William E

hace 6 años



hace 6 años

ok I understand what you tell me friend here annex the image and see what is pin 50

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nicomena2015

9.501

hace 6 años

friend: the jungle's feet are numbered on the board ... there is pin 1 on the board and ends in that row with pin32 ... then turn up the other row with pi33 to pin64 .. .It's easy to see which is pin50 ... ok ...

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William E

hace 6 años

bn what ago and I warn you friend

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William E

hace 6 años

place the 3 diodes 1n4148 the 3 cathodes joined to the resistance 3624 and the anodes 1 to 3619 1 to 3620 and 1 to 3621 and ready it works perfectly thanks to the friend nicomena2015 for the contribution and teach us 100% grateful

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nicomena2015

9.501

hace 6 años

ok ... colleague ... I'm glad that you have solved the problem of tv ... on my part (congratulations) for the achievement ... now do not forget to value my contribution as a solution in the space of my first comment ... You have given a solution but you have given it to yourself ... you will give that solution to me and to guide you in the repair of the TV ... ok ... greetings !!!

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