Component Repair Service!!!

[LektroSmog]

Hi,

I connected my 7" lcd with reverse polarity (3S Lipo). Lcd is this on http://www.dealextreme.com/p/portabl...40x234px-81058
Reverse connection was max. for a second cause I heard some cracking... so disconnected. Connected again with correct polarity- lcd came on but went out after a few seconds... smelling fried electronics. Disconnected immidiately.

Would be cool if this could be repaired cause its a really nice lcd... shows static without bluescreen.

Here are some pics of the PCB
The backside shows no burns or anything - also no components on the back.
Looks like the only thing burned it this black chip.

What part might that be exactly? Voltage reg.?

Rob





cleaned up with alcohol:

[Martin Y]

That is a switching power supply IC. No idea was it is. I may be able to come up with with something but will take a bit of time. The capacitor beside the coil with the 220 marking on top, what is the value?

[LektroSmog]

Martin,
thanks for your reply. The capacitor next to the 220 marked coil is 220uF 10V.

[MrFliboy]

Seems the blue component is DOA (L207) it has a black spot also on the front. It allows the full battery voltage to the module.

Any suggestions on replacement??

As always thanks again.

[Martin Y]

thats a coil, no idea of value. If you have any old electronics around you may fine one inside. value is not to critical.

[MrFliboy]

Thanks I looked and its a weird looking thing, nothing in my boxes

[baldwinc]

I have a Hoverfly Pro board that I think I have fried the ESC outputs on- and Hoverfly doesn't repair their boards...darn it. To my very untrained eye, it looks as though the component on the board with the burned spot may be at fault. I don't mind sending it to you for eval if that is required- Also, I can take a better picture when I get home- this is the only one I had on my phone. Thanks!

[h0tr0d]

Hi, I have kind of a silly question for you. I have two broken vtx's. One was involved in a game of chicken with a tree 800mW rmrc unit and has a rolling black and white picture now...like it won't get lock. The other is a 200mW vtx that I managed to power up with reverse polarity. My thinking is that perhaps the crystal on the 800mW unit is broken and I was wondering if you thought it might be possible to swap the crystal from the 200mW unit to the 800 to try and revive it.

Thanks in advance!
-Pat

[Martin Y]

baldwink - Pm sent.

Pat - I may be able to repair both.

[h0tr0d]

I might have to take you up on that. Can I pm you for details?