On 11/08/2012 23:06, Lieutenant Scott wrote:
On Sat, 11 Aug 2012 22:48:45 +0100, geoff wrote:

In message op.wivpgkz3ytk5n5@i7-940, Lieutenant Scott
writes
On Sat, 11 Aug 2012 12:13:37 +0100, geoff wrote:

In message op.wishsjapytk5n5@i7-940, Lieutenant Scott
writes
I don't know if I told you but I have a graphics card that's out of
warranty and stopped working.
Well I checked for swollen or burst capacitors, there weren't any.
So as a last resort I tried the bake in the oven method to reflow
the solder.
9 minutes at 196C as advised.
The solder didn't appear to have melted, and the card remained
inoperative.
Perhaps my oven thermostat is inaccurate? Try hotter!
Max - 240C.
BANG! Now I've got burst capacitors. All over the oven.
I shall refrain from reinserting it into the computer.


I think you should refrain from going near anything other than wax
crayons

hang on ... 200C?

Perhaps those as well

http://www.addictivetips.com/hardwar...aking-in-oven/


Must be true, its on the internet

If it was false there would be contradictory articles.

Its not false, but it is poor practice.

Using a pre-heated oven is also likely to exceed the component
temperature maximum slew rates. Most components will not only have a
maximum temperature, but also a max temperature rate of change specified
(e.g. 4 deg C per sec). This applies bit on heating and cooling.
Exceeding that can stress them and lead to premature failures. That's
without the problems of exceeding the maximum temperature limits for the
larger discrete components.


--
Cheers,

John.

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