blown bdm port: what is actually "blown"

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k0mpresd

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	blown bdm port: what is actually "blown" « on: June 09, 2012, 11:38:06 PM »

does anyone know where the fault lies in a "blown" bdm port?

ive followed traces, poked around with a multimeter, and even swapped a few resistors but was never able to revive the port.
im thinking the circuit in the cpu is blown. can anyone confirm this?
if this was the case the only "fix" would be a cpu transplant. which doesnt seem so hard. Wink

any insight is much appreciated.


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technic

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	Re: blown bdm port: what is actually "blown" « Reply #1 on: June 10, 2012, 07:22:07 AM »

Depends on the type of CPU but, I/O buffers and/or clamp diodes inside CPU can be destroyed. I'm talking out of experience here Wink


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k0mpresd

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	Re: blown bdm port: what is actually "blown" « Reply #2 on: June 10, 2012, 07:39:13 AM »

so the only way to make bdm functional again is to replace cpu, yes?


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technic

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	Re: blown bdm port: what is actually "blown" « Reply #3 on: June 10, 2012, 08:08:06 AM »

Yes. Maybe if you are lucky your ecu have external buffers and you can change them. I have never seen that though.


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k0mpresd

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	Re: blown bdm port: what is actually "blown" « Reply #4 on: June 10, 2012, 08:33:25 AM »

thanks.


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kaross

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	Re: blown bdm port: what is actually "blown" « Reply #5 on: June 25, 2012, 11:54:13 PM »

How did you removed CPU?


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k0mpresd

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	Re: blown bdm port: what is actually "blown" « Reply #6 on: June 26, 2012, 06:11:26 AM »

well that ecu was already permanently fried/dead so i just used a hot air gun. but i was going to do it as a service or for me personally i would use my ir achi 6000.


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