high voltage diode from 1972.
anybody got a datasheet?
anybody got a datasheet?
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Hi Folks
I'm looking for a extreme high current short killer solution for a reasonable cost.
I have an LGA1700 motherboard (ASUS PRIME Z790-P WiFi) where I exchanged the LGA socket already 3 times, and every time after the socket exchange I get a short of power supply lines VCORE (V variable) and VCCIN_AUX (1.8V).
After taking off the socket, the shorts dissappear again.
The soldermask on the socket is already partially demaged from the heat, so I have reconstructed the soldermask by manually painting the missing soldermask parts with a very small top of a...10-15-2024, 10:13 AM -
Have an A2141 which is reading about 5.2V 0.07A on all USB jacks, started doing the measurements.
PPBUS_3GH diode: measures good .45V
PPBUS_3GH Voltage: maybe not so good 12.25V maybe bad T2? Unit did not come up in DFU on configurator.
The weird so far is
PP3v3_G3H_RTC_X diode: .104V (WTF?)
PP3v3_G3H_RTC_X voltage: 3.39V (Normal)
Stopped there attempted reverse voltage injection at PP3v3_G3H_RTC_X with 1V. Instead of the circuit sinking any current, My PSU suddenly reads 3.4V with no current draw.
Not sure what any of this means... -
Is there any reason why high voltage high resistance resistor use weird marking and value on it? Standard nomenclature, EIA value not used?...
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This is my first attempt at troubleshooting a board like this, I know I could just buy a new board but I'm curious to figure out how this works. I've been testing different components in the evenings this week and I think the problem is with the IC failing to start up for some reason. When the board is plugged in there is no standby voltage.
Then today it randomly sprung to life like a zombie but shortly died thereafter. I have no idea why it would have done that and its the first time I've seen it running. I discharged capacitors on the board last night, then it was sitting today.... -
Low voltage very high current rail distribution
I have some mains toroid transformer220v/12v, and thinking to add a few one-two turns fat coil in parallel, like in picture. Red are working windings, purple (top and bottom) is rails who connect all low voltage windings.
Question is, how to connect that device to be as much more efficient in spot welder operation to distribute and pulls currents to all winding equaly, minimalize voltage drop?
output on half E-F
output on C-B
connect A-B and C-D, output on A-F
otherwise?...