Vizio E321VL dead blown fuse help

Forum > LCD TV forum

<< < (4/5) > >>

silva1955:

--- Quote from: silva1955 on March 26, 2017,15:28:11 ---
--- Quote from: downunder on March 25, 2017,20:57:40 ---
Glad to hear that you've resolved it, silva. Thanks for the feedback. I just worry a bit that there will be inadequate heat transfer from the fully insulated FETs.

Bruce

--- End quote ---

Thanks Bruce; you mean the SM mosfet that was there has more resistance to heat then the TO220 mosfet that Jimmy sent me? ,can you please elaborate.

--- End quote ---

Also won't the TO220 mosfets last long due to heat? i wonder why Shopjimmy sent me these TO 220 mosfets since Q706 Q707 are SM mosfets and are part of the Kit i received from Jimmy,this is wrong,i already contacted Jimmy about it ,if i don't get the right ones i will never buy anything from him.

downunder:

Hi silva, I reviewed your pictures, and on consideration, the tiny bit of print that the original FETs are attached to would only provide next to zero heat dissipation. The absence of heat discolouration bears this out. As they're mounted on the print side of the board, they're probably subjected to more external heat from the rear of the display panel, than internal operational heat, so I shouldn't worry about it too much.

If in doubt, run the TV for a substantial period, then feel the FETs for temperature level.If they appear to be overheating, perhaps you can fashion a heatsink for them out of aluminium, or use a strip of heat transfer rubber they seem to use widely these days, between the board and panel.

Bruce

silva1955:

--- Quote from: downunder on March 25, 2017,20:57:40 ---
Glad to hear that you've resolved it, silva. Thanks for the feedback. I just worry a bit that there will be inadequate heat transfer from the fully insulated FETs.

Bruce

--- End quote ---
downunder;you mean these TO220 mosfets wont last long due to heat? i wonder why Shopjimmy sent me these TO 220 mosfets since Q706 Q707 are SM mosfets and are part of the Kit i received from Jimmy,this is wrong,i already contacted Jimmy about it ,if i don't get the right ones i will never buy anything from him.
Here the KF5N50 mosfet TO220 data sheet,i don't know much about this stuff.

http://www.electronica-usa.com/graphics/KF5N50.pdf

downunder:

Hey, stop stressing, silva. I'm not saying they wont last. They're up to the task and as the originals had zero heatsinking, the new ones are no worse off.

Never dealt with Shop Jimmy, but they seem to have a good name and have probably done their homework on the kit. Bruce

Navigation

[0] Message Index

[#] Next page

[*] Previous page

Go to full version