| 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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