As titled. I haven't been able to find one.
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sigpicThe Sky Is Falling
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Re: Anyone got a datasheet for upc255a?
this may help
looks like a 709 / 741 type op-amp
http://www.vetco.net/catalog/product...oducts_id=6174 -
Re: Anyone got a datasheet for upc255a?
Thanks STJ. I found an equivalency sheet that gave the NTE and a few others. I found their datasheets just can't find the NEC datasheet. I've got a schematic that gives the pinout for the NEC but just want to be sure by finding the NEC datasheet. The board has 4 pins in a row like the rectangular op amps and I was thinking maybe I could just put a socket in and could then use more modern op amps in the unit. Out of eight I have, I've found two bad already. So I was thinking that's a pretty high failure rate.sigpicThe Sky Is FallingComment
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Re: Anyone got a datasheet for upc255a?
old op-amps did fail a lot.
for the nec, you may need to look for a pdf of an old nec databook rather than a datasheet.
datasheets did not really exist before the net.Comment
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Re: Anyone got a datasheet for upc255a?
I think a place called IC37.com has a datasheet for it. Too bad I can't read Japanese. It looks like they want 15 Yen for it which is what, maybe a dime. Too bad for me.sigpicThe Sky Is FallingComment
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Customer plugged in samsung monitor into the board and used it as a power supply, killed UG800 and UG400. I replaced those two with an exact donor board we had In stock and working, board pulls 5volts and then gets like 2.89 amps on the left side. The singular port is the port that failed. Used a perfectly working chips from donor (board was locked) Now I only get 5volts 0 amps on that power and then 20volts 0 amps on the two left side ports, I checked for DFU and nope nothing, computer not turning on. No shorts present anymore. I am confused as I used the exact components from an identical...
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Customer plugged in samsung monitor into the board and used it as a power supply, killed UG800 and UG400. I replaced those two with an exact donor board we had In stock and working, board pulls 5volts and then gets like 2.89 amps on the left side. The singular port is the port that failed. Used a perfectly working chips from donor (board was locked) Now I only get 5volts 0 amps on that power and then 20volts 0 amps on the two left side ports, I checked for DFU and nope nothing, computer not turning on. No shorts present anymore. I am confused as I used the exact components from an identical...09-10-2025, 03:15 PM
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Hi guys
I have a MacBook Pro A1990 that takes 4.9 Volts and .592 to .615 amps on one port. The other port on the left side power cycles with about the same amount of volts an amps but quickly power cycles. The same thing happens on the other side but opposite. So on the left side the bottom port stays on and on the right side it's the top one. I think it is a CD3215 chip but I am not sure how to test it or where to get one. I have checked for voltage at ppbus_g3h and it has 12.6 V which is also on fuses f7000 and f7001 I checked pp1v2_s3 and it has 1.2 V then... -
First post -Intel NUC 10i5 -BXNUC10i5FNH not powering on -IC burnt- request for IC details/datasheetHi all,
I came across this very active forum with knowledgeable folks on electronic circuits and components, while google searching for the details of my burnt IC marked 7603 in Intel NUC board. I joined this forum today and this is my first post here.
I recently got an Intel NUC 10i5 and had installed Linux Mint and was using it for about a month when it died suddenly and did not power up after that.(Power Adaptor is ok). When I opened the NUC , there was a burnt IC marked 7603 (and ILCB in second line). I am unable to find the details/datasheet of this IC. I will be grateful if... -
Hi, pulled this component, (I'm assuming it's a MosFET) from an LED COB video light. Im trying to find the datasheet so I can find an equivalent replacement but no luck. Any assistance with the datasheet would be appreciated.
Failing that, a way to pick a suitable replacement component? If it's indeed a switching fet, I'm assuming I might need to measure the switching clock frequency and find a component that meets the power capacity?
Its a pair of them driving a 130w Light. Takes in 19volts. I can borrow a scope to measure the switching freq....
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