[DuoList] 2x 2400 GLOD after long time non-use

[Tom & Lisa Peters]

Its been a while, but I think there are 8 (?) or so fuses scattered around the motherboard and powerboard. Look for small SMT parts with a F# next to them on the motherboard.  They will all be fairly small (2x5mm?) except for the main 5A fuse on the powerboard.

Mad Dog


On Jan 15, 2011, at 7:29 AM, Stefan Kiltz wrote:

> Cheers man,
> will try that, which of them fuses are likely candidates? I guess a schematic (nah, probably not available for us merely mortals) or a picture with locations of the fuses would support my venture greatly - any hints as to where to look for them?
> Ta
> 
> Stefan
> On 15 Jan 2011, at 02:39, Hansel Chung wrote:
> 
>> That's possible. Usually when electrolytic capacitors are dying, they have some physical signs of stress or leakage.
>> Take it out and take a look.
>> 
>> Since you have multiple CPU cards, might want to fix the GLOD first? (typically fuses)
>> 
>> As for the heat, it's not likely a fuse would be involved in determining if it runs too hot or not.
>> 
>> -Hansel
>> 
>> On Nov 24, 2010, at 9:53 AM, Stefan Kiltz wrote:
>> 
>>> Hiya people at the duolist,
>>> long time lurker here with a question to all techies out there. I have two Comets (bog-standard PPC603e 180MHz) not working anymore. Thought I fried the CPU card with the first one. The second one worked fine all the way to me putting it on a shelf for a year. After re-plugging the power, all I get is the dreaded GLOD, followed by a faint (sort of rattling) noise originating vom the power supply daughterboard.  Thanks to Ralph Mawyer, who sold me one of his 603e CPU cards, I can rule out a CPU failure.
>>> Since working with electronics for quite some time (not professionally though), I know that capacitors, in particular the electrolyte capacitors, have a tendency to dry out and losing their capacity. Could it be, that the big capacitors on the power supply daughter card may have gone faulty?
>>> Second question would be if any of you people sees a chance to bring my NewerTech G3 upgrades back to life - back in the olden day, the first 2400 was my mainstay and I paid a lot of money for that NewerTech 240MHz G3. I believe it ran too hot, though not seeing any signs of excessive heat on the dye/heatsink plate. Maybe some sort of SMD fuse or resistore acting as one needs to be replaced?
>>> I'd really love to put them Comets back into action again, ideally with the G3 upgrade, which seems to be resembling gold dust these days.
>>> I'd really appreciate any tips or directions where to dig deeper.
>>> TaRa
>>> 
>>> Stefan
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