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,
i have a hp display 2311 to repair, totaly dead
on the board, il have 2 capacitor 470µf that are dead and the 3.3v regulator : ax6630-33
i have no such regulator, can i replace this one with a mic5209-33 (3.3v outpout regulator too) ?
thank you -
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 ? -
Hi everyone,
I’m trying to identify a step-down regulator marked AMCH073. It’s used on the PEX power rail of a graphics card. I can’t find any datasheet or info online.
Here’s what I’ve observed:
• It has a QFN-16 footprint, similar to NB670.
• Pins 1, 2, 15, 16 are connected together and go to the inductor, so likely SW (switch node).
• Pin 9 is connected to GND, which doesn’t match NB670 (where pin 9 is SW).
• Pin 8 also seems to be tied to the same GND plane.
• The chip only says AMCH073, no manufacturer logo or other markings.... -
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...
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