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COMPUTER BUSHIT BMW 325 IX , PLEASE help !

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Am gasit cablajul impushcat si un tranzistor , (cred ?!) in scurtcircuit cu una dintre jocntiuni ! Pe el scrie "ON 588 " dar nu il gasesc in nici o baza de date ca sa imi dau seama ce sa pun in locul lui ! Va rog daca ma puteti ajuta in vreun fel ! :prayer: Astept urgent pareri sau sfaturi !!! masina nu mai porneste ! :toimonster:

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Vezi daca iti merge pagina ASTA si uita-te acolo ca gasesti echivalenti. Mie mi-o listeaza google insa nu pot sa intru pe ea.

 

 

Am cautat putin pe net si am vazut un post al lui niq_ro pe un forum strain in care cerea datasheet-ul acestui tranzistor. Ia legatura cu el si vezi daca te poate ajuta.

 

Tot el a gasit si un echivalent (parca)...BUT11AF, mai multe lamuriri AICI

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da, un BUT11AF am pus, da' nu mai stiu aplicatia pentru care l-am folosit :axe:

am gasit pe http://www.s14.net/forums/showthread.ph ... stid=77559 ca ei pun un TIP31

 

"4) PH ON588 vs TIP31.

 

Yes, a TIP31 C (an NPN) was the transistor I used to replace

a bad ON588 (T560). Why a TIP31? Because it is a universal

power switcher, it has the same capsule (TO220), it has the

same pinout and I had it in my transistors box.

 

Once the TIP 31 was installed, the ICV module came back to

life, the ICV was vibrating and the buzzing was there again.

But this time I experienced something new : the real cold start

regulation. When I start the engine now, I get a strong and

decent idle at 1000 rpm, which lets me put a little more of load

on the cold engine and it doesn't try to die or stall. That's the

real difference between an ICV that works 100% and another

that doesn't. Aprox. 90 seconds later, the idle falls to 900

rpm for some seconds and then it falls again to 800 rpm,

where it stabilizes. I like how it works now.

 

The TIP 31 is a good substitute, but not necessarily the best

one. Looking at the Vcesat of both transistors we realize that

they are not the same. The Vcesat of T561 (ON588) is more

stable, it's around 0.8 volts all the time . However, the Vcesat

of T560 (TIP 31) varies from 0.2 to 0.8 with the engine off and

from 0.2 to a "dangerous" 1.2 volts when the engine is running.

Anyway, the transistor is doing its work and the ICV is working

as expected.

 

If you want to try with a different NPN power switcher, that would

be great. We can compare afterwards."

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