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Posted on Jan 02, 2017
SOURCE: pyramid ps-15kx
Unplug the PS-15KX 120V AC cord !! Then take cover off. DO NOT plug the AC cord in unless you are used to working around a lethal voltage and current !!!!!!!!!!
If you can use a Multimeter, then measure resistance across each pair of the 3 leads of the output transistors. You will probably find fractions of an ohm across a pair of leads. One or both may be shorted. NOTE: Do not ever measure resistance in a powered up circuit, kiss meter bye-bye and maybe burn you too.
By putting more robust transistors in this supply, you may not gain much reliability. The supply is rated at a continuous current draw, which is less than the intermittent current they advertise. Read the spec's of any power supply you get and look for continuous current ability.
There are several better transistors that will substitute for the 2N3055. You will need to look at a transistor substitution book and check specs. The internet is great for this. I used to use all kinds of data books, and still have them! But looking up info on-line is nice. Motorola has some that will fit and have higher current and voltage ratings,
Get someone who is a ham or geek if you aren't sure about sticking your fingers in the power supply.
Be Careful, Work Safe, it is a factor of longer life.
Posted on Nov 14, 2008
Make sure that the power button is conected to the right prongs on the mother board. On the writing next to the prongs it should say power.
Posted on Feb 24, 2008
SOURCE: power supplies
I assume you want to turn on your son's device with this ATX PSU.
here is the 20 pin configuration.
which gives you an idea of which pins could be used.
Posted on Oct 08, 2008
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