Transistors identification
I found these transistors but could not get information about them, does anyone know?Motorola 1854-1220 and 1854-0922.
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Re: Transistors identification
Probably an internal manufacturer part number.
Manufacturers have special parts custom made by semiconductor companies (if they need a sufficient quantity that is) and they can have them printed with whatever part number they want.
Like the DNA1001 and 1002 ICs on the original Xbox PSUs. No datasheets or info available anywhere.Last edited by Krankshaft; 07-18-2011, 11:00 AM.Elements of the past and the future combining to make something not quite as good as either. -
Re: Transistors identification
OEM part numbers that you'll never find. Test them and if they are good, use them for a projects like a power supply regulator.Is it plugged in?Comment
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Re: Transistors identification
Those look like H/P part numbers but they don't show on the cross ref. charts. What are these out of, if I may ask?Comment
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Hi:
I am trying to repair this amplifier that I've bought as faulty. I've found some transistors damaged, the ones where I am drawing a red circle.
With the final transistors not yet installed (the expensive ones), I've started to measure some voltages:
Where I am supposed to have 1.12V (base Q524/Q523) I am reading -42V..................both channels don't seem ok.
Where I am supposed to have -1.12V (base Q526/Q525) I am reading -44V..................both channels don't seem ok.
I removed and tested Q514,Q516 & Q513,Q515 but the analyzer... -
I had a Sundown SFB-8000D amp come into the shop yesterday that wasn't giving any output. The guy who brought it in said he bought it off some crack head on Facebook marketplace for a good price, but bought it knowing it was broken. Apparently the original owner was cutting out the transistors to the right of the ones pictured whenever one would blow and take the output out. Best I can figure he also cut the legs on the S5 and S6 ic's as well and soldered them back together.
My problem is Sundown decided in the factory to remove the original markings on the IC's and now I can't figure... -
Welcome badcaps, repairing a Crosshair 15, in need of transistor specifics. Received a broken laptop that's was perfect for repair, threw away the looser transistors in a haste... Should and could have salvaged them.
In any case, I will be posting all my discoveries to this forum as a thanks in advance. Thanks in advance lol.
P.S. If anyone is familiar with such things, as in, If anyone knows that MSI uses one or one of a few types of transistors when marked with a number please let me know how I can find more specifics before I start throwing hail marys. -
Hello,
While ago I replaced those big filter caps to that amplifier. After that started to happen. I connected the amplifier normally to the mains and almost immediately several transistors burned out. I really didn't do anything else (at least on purpose) than replaced those big caps C801 and C802.
After that I replaced those burned transistors (I can't remember exactly what they were) and measured all the others, and now everything should be ok. But, when I power up that amplifier part with two bench power supplies connected in series there is obviously still something... -
Hello everyone,
I have a problem with my Acer predator XB241YU screen. When I plug it in, the startup LED turns on instantly, and I can't turn off the screen without unplugging it.
After disassembly and inspection of the electronic cards I found what looks like a broken inductor, it is marked with the letter A and is at location L58.
In the first photo you can see the broken component, in the second photo you can see where it is on the board, in the third photo you can see the silkscreen and in the fourth photo you can see the identification sticker of the main board
I...
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