Electronics > Beginners

repairing crt tv, start with recapping

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2takt:
i have added the pictures of the screen on start up and after it fixes itself

i worked quite a bit with this solder and very happy with it. i dont want to find out how it feels :)

yesterday i saw a video from retromancave but the other way round, after the pc warming up the screen starts blinking and then goes completly away. he fixed it with recapping the whole board.

i dont know what foldover means or is this my failure in the picture?

the speakers have a bit of hum when the tv is on, so this does matter?
i did find some low esr caps befor the meter quited on me yesterday.
the rectifier is just an arrangement of diodes? like the full bridge rectifier containing 4 diodes

i will post you an update if i find something with my now working esr meter
thanks again for all your help

xmetal:

--- Quote from: vk6zgo on August 29, 2019, 01:32:40 am ---Most TVs indeed used a transformer variously decribed as a " Horizontal Output" transformer, or an "EHT" transformer, or less commonly (at least in Oz) as a "Flyback" transformer.

--- End quote ---

It's also known as a LOPT (Line output transformer) in the UK.

2takt:
this green yellow white and red pieces in the picture,  are this film capacitors?

i only have found one cap on the chroma modul labeled 470uf 6.3v with esr of 0.219. meter says good if < 470uf

i couldnt read all the values. will have to wait for the desolderstation then i will get the shielding/heatsinks out of the way.

on the front input panel i have 331j (ceramic?) caps the meter just reads 0L is this normal

xmetal:
I think they're polyester film capacitors from first looks.

2takt:
the red ones says 0.12j so there are 100pf/0.1uf with 5% tolerance?

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