Technika LCD32-270 - flickering screen (Part Two) Fixed

I fixed this TV that had the flickering screen. The five capacitors which feed the 24v back-light were failing with the result that the screen was rapidly flickering. The new capacitors came from CPC and removing the old ones and fitting the new ones was very straightforward. I'm not doing a blow by blow account but there are some photos below showing the new caps in situ and the TV now working (its the one on the floor with the blue screen :))

More soon, no doubt...

D.

Technika LCD32-270 - flickering screen (Part One)

Got a new project from my friend with the Rover; a Tesco "Technika" TV suffering from a flickering screen. I said I'd take a look. On opening it up, I can see three of the five capacitors on the 24v channel are all bulging. The three that have failed are 35v 470uf. The other two are 35v 220uf. All five are "F-Con" brand. I'm not sure how old the TV is but I don't think its an ancient one. Anyway, I'll swap all five for something decent from CPC and hopefully that will resolve it.

The tear-down (once I'd taken the stand off so I could lie the TV flat on the floor) was straightforward - just 17 phillips head screws. Note the five screws near the middle/bottom are machine screws whereas the rest are self-tappers. Then just remove the heatsink cover from the right bank on the PSU and hey presto - blown capacitors in all their glory.

I'll order the bits from CPC and do a fresh post for the repair.

More soon, no doubt...

D