Microsquirt V2 Schematics

[sportage4x4]

I've searched, but have been unable to locate some schematics for the newer v2 microsquirt. anyone know where they are or if they are available?

thanks

[Fabrik8]

I've been looking also, and haven't been able to find them either.

[sportage4x4]

can anyone tell me if any of the VR circuit components have changed value/location from the V1 microsquirt?

[robh]

I remember reading that v2 increased the inline resistor for the VR1 input. This was a while ago and they did not mention what the change was exactly. (this change is not mentioned in the Microsquirt Board Revision- Sept 2008 post) v1.0 had a 10k resistor.

That's the only change I've heard of for the VR circuit but I am pretty new to all this so I'm sure there are others out there that know more about it.

[Bruce Bowling]

Shematics for V2 of microsquirt are posted. And, the only change in the VR circuit was to use another type of diode for the transistor base-emitter - I talked about this mod in the sticky on the VR circuit...

- Bruce

[Matt Cramer]

Thank you for the update.

[nemiro]

I am trying to diagnose a no communication problem with my Microsquirt. I have a MS2 that works just fine, but no joy on the uS. I can't seem to find the schematics to do some checking. Can someone please post a link?

I have good comm pulses coming into the uS, as measured on a scope, but nothing comes out. The clock is running on the uS, but it acts like the lights are on, but nobody's home.

[nemiro]

OK, I found the schematics. I can see the pulses going into the uS board, and through the MAX3221 converter chip. I can also see that uS is trying to answer, but it does not make it through the MAX3221, so I am assuming that I have a bad MAX3221.