tv philips model 20gx1850 / 85r does not turn on
Good evening: The criteria to repair you have to use are others. But I leave a link to download the TV service manual ...
https://www.electronica-pt.com/esquema/tv/philips-esquemas-tv/philips-anubis-s-cc-chassis-6553/
no friend I have voltage in the source to the primary of the transformer but in the secondary there is no voltage
There the colleague Neg2013 kindly placed the diagram of his TV measure that voltages are present in the oscillator of the UC3842 source
You can remove the horizontal transistor and check if the secondary voltages are restored and check that the secondary diodes are in good condition.
remove the transistor from the horizontal and still no voltage on the + B but it doesn't even oscillate so I thought the source motfet transistor be damaged
if colleague is the one with the plate inserted in the source but at the pins of that plate I don't have any voltage, I will not continue checking and I comment
ok I download the diagram but as an image and you don't see anything, that is, the codes are not distinguished
The TV is very, very old, usually good diagrams of these devices, it will not get anywhere. Nothing can be done when a PDF is of poor quality when passed to image format (JPG or any other format). The best thing in these cases is to have the manual of TV diagrams, or to make an enlarged impression of the diagram, I used A4 sheets at that time. All this of course if you use one of those modern phones ...
colleague change the 2 condensers that were recommended to me and the tv turned it off to put the lid on and when I turned it on again it didn't turn on anymore. only the red LED is flashing and does not light
good morning colleagues I inform you to change the 2 capacitors that I was told and the TV turned on. I had it on for a while and I turned it off to place everything as it goes to cover it and when I turned it on again it didn't want to turn on anymore. on time when I turn on the red LED flashes but does not turn on. It is to be understood that the capacitors that I mount were not new were used.
These Philips brand devices have their little big secrets, they are complicated many times to repair, and other times they are complicated to understand. In the case of capacitors you always have to use new ones. You have to renew the + B capacitors too. Many times the failures are only caused by the exhaustion of them, but well many other failures are another separate dilemma.
Good morning to my colleagues I inform you that I already solved the problem of the TV as recommended by colleague neg2013 and I got voltage in the + b but I did not have in the collector of the horizontal output transistor restore the food track of the transistor and problem solved. Many thanks to all who helped me greetings