[G4] Power supply woes

[Udo Zumdick]

Hi there,


I don't know much about fuses, but my experience in the past is:

Although here are fuses of many different kind of types on the market,
but the only two things which really matters are the structural shape
(length/height/glas a.s.on), the ampere (8 A in this case) and if it is
slow or fast blown type.
The important things are, of course :-), the shape and amperes. I you
are unsure, use a fast blown fuse,

The specs of the type uses in your Mac can be found here:
http://dainfuse.com/51s.html
Maybe the could be useful.

BTW: Fuses do growing older and reach a point, where they just break
down. So it has not be an hardware error in every case.

Hope this was helpful a little :-) (if anyone understands my english....)

Greetings from good old germany,

Udo

transform wrote:
> the fuse is probably a slow blow and might be a hrc type which means
> that the fuse has a  sand type material inside it.
> any way replace the fuse with a slow blow normal type which should be
> available from any electronic/electrical store, Then disconnect all the
> outputs and then plug it in to the mains.
> dose the fuse blow????
> if not turn power off and connect some outputs to the supply and see if
> fuse blows or not.
> keep going till either the fuse blows or the unit all works again.
> low supply (mains) voltage can cause the fuse to blow as low volts means
> the current increases .
> 
> 
> 
> 
> On 12/10/2005, at 3:24 AM, jim carbone wrote:
> 
>> Hello,
>>
>> I have a PowerMac G4 Mirror Dive Door 2003 (Dual 1.25) that completely
>> shut down on me this weekend--no power, no fan, no nothing. I traced
>> the problem back to the power supply, removed it and opened it up to
>> find that the fuse is completely burnt.
>>
>> Having never had to deal with this before, and being in a state of
>> emergency here time wise... what is the proper course of action?
>>
>> I would think that I should try to just replace the fuse to see if it
>> holds and attribute the blow-out to a freak power surge or something
>> (I do have a surge protector on that line).  My problem there is I
>> can't find this fuse anywhere and the endcaps don't tell *me* enough
>> info to trust that something I find online is the right thing. Here's
>> what is says on the fuse, "250V 8A 51S" I don't know what the "51S"
>> stands for. I have determined however that this is a 5 x 20mm glass fuse.
>>
>> Anyone with similar troubles in the past that can help me get up and
>> running fast? Time is so important to me right now that I'd even just
>> overnight a new PS here if that meant I could save a few days of
>> hunting down and blowing out more fuses.