On 11/11/12 16:23, Bob wrote:
Hi All,
I've heard much talk in this group about the power supplies on the Z3805.
After about 10 days with no power here on Long Island (thanks Sandy.), I
finally fired up my Z3805. It started producing a real bad smell after a
few hours, the classic burnt transformer type. This is my second Z3805 and
it didn't smell the first time ran it, nor did my first one smell. I
opened the unit and found the 25W 5V, +/-15V (made by AT&T) was real, real
hot.
Eventually the smell went away and the supply cooled down a bit. The unit
reports all OK, is tracking SATs, and running properly. IMHO It seems this
supply was not properly derated for start-up conditions. Is this the supply
driving the heater inside the 10811? Has anybody installed a CPU
heatsink/fan combination to help in thermal management?
Any insight would be appreciated.
The oven heatup should be essentially finished after 15-30 min, so load
on PSU should be essentially back to normal after that.
It doesn't look like that PSU is in it's best state, so I would consider
looking at it and see if it needs an overhaul.
Could be that cooling isn't what it should be, but it rarely gets this
bad for such a PSU.
Cheers,
Magnus
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