Re: Cisco pix 506 fw psu
I would still check the output cable for shorts, so so common with laptop adaptors :-)
I would still check the output cable for shorts, so so common with laptop adaptors :-)
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First off, I'm sorry if this is the wrong subforum - None of the others seemed to fit the description.
I've got this Cisco 2960-CX. It works flawlessly otherwise, but won't provide POE to the ports.
On initial inspection, U4701 (An SI3458) has a physical hole in the die. I replaced with another chip out of a dead 2960, and it immediately popped a new hole.
All I've been able to pull up are datasheets for mosfets, and I'm not quite convinced this is a simple FET.
Popping the die implies an overcurrent downstream, correct?
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Hello everyone,
I want to find a replacement for uP0109 8pins, and i found this parts:
uP0109 is "2A Ultra Low Dropout Linear Regulator"
RT9199 is "Cost-Effective, 2A Peak Sink/Source Bus Termination Regulator"
FP6137C is "2A BUS TERMINATION REGULATOR"
can replace uP0109 by RT9199 or FP6137C ? -
hello ,for diy voltage injector for short killer/finder -- is it possible to use something like this - LM317 DC Linear Regulator, DC-DC 4.5~40V Turn 1.2~37V, Step Down Power Module, Adjustable
and ampere controller along (to make it zero amps ) with some addons(transistors diodes etc.) for it -- and use some 5v adaptor or 3.3v volt rail of my smps power supply as input and finally get 1v and zero amps for injecting voltage to find out short circuit component ? ..
for source input -- can we use 3.3 -4 volt 18550 battery ?( i have some of those ) and then adding ampere regulator... -
Hi to all forum members,
This psu (Tiny Tech model ATX 480W) had been installed in a very old Windows XP PC but recently i pulled it out as the pc cannot start. To test it, i jumped the green wire and black wire on the 24 pin connector. The psu fan jerk a bit but not spinning. I used my dmm to check dc voltage on output connector wire, the 5v red wire keeps ticking a bit at around dc1v....then drops and ticking again around 1v. It is the same situation with the 12v yellow wire.
Fyi, i desoldered the secondary side electrolytic cap those over 1000uf... -
This Concept 2 rower pm5 monitor doesn't shut down. It keeps turning on and stays on after being turned off. I read on another forum by another user that replaced the same component to check the voltage regulator.
The monitor should pull around 35mA when turned on and in shutdown it should drops to around 0.060mA. Any advice on finding the voltage regulator on this board to check if it needs to be replaced?
11-05-2024, 07:38 AM
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