flak monkey
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| posted on 6/5/09 at 08:14 AM |
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VB921 jumper configuration
Anyone able to shed some light on this as the MS manual, is as ever, rather vague.
What jumper connections are required in order to use 2 VB921/BIP373 for direct coil drive with MS1 extra?
IGBTOUT to IGN is required as shown in the digrams on the MS Extra site.
But what about JS10 to IGBTIN? Or does the 330ohm resistor from R26 and R29 replace the need for this connection and provide the ign pulses to fire
the coils?
Cheers,
David
Sera
http://www.motosera.com
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MikeRJ
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| posted on 6/5/09 at 09:25 AM |
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The DIY Autotune website is much clearer than the MS Extra manual IMO!
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ruudbeckers
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| posted on 6/5/09 at 09:48 AM |
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Do you have a v2.2 or a v3 pcb?
For the v3 look at http://www.msextra.com/manuals/MS_Extra_Ignition_Hardware_Manual.htm
and search for "Two Coils Direct Drive Output for a V3.0 PCB".
Don't look at the schematic, it is not for a coil driver. Look at the picture with the main board components. Below this picture is exactly
written what you should do. Although you have to place the coil driver at the location of R38 instead of R36.
Hope this helps.
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flak monkey
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| posted on 6/5/09 at 10:04 AM |
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Thanks chaps. The DIY auto tune site is much clearer, but contradicts the input circuit described on the MS Extra site, by saying link TSEL to VROUT
and not to VROUTINV...but still describes connecting the VR sensor the same way around as the MS Extra site.
Seems to be lots of contradicting info wherever you look.
My point was that nothing tells you if you still need the jumper between JS10 and IGBTIN.
Its a V3 board.
Cheers,
David
Sera
http://www.motosera.com
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ruudbeckers
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| posted on 6/5/09 at 11:00 AM |
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You don't need the jumper. The 330R resistor will connect IGTBIn to the correct output of the CPU.
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BenTyreman
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| posted on 6/5/09 at 01:32 PM |
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As far as I can remember, VROUTINV is for MS1 and VROUT is for MS2. The different CPU triggers on the opposite edge (either rising or falling). If you
post on the MS Extra forum someone will have the definitive answer.
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