driverblock wrote:Sounds like maybe you have some cold solder joints? Make sure that all the leads are well-soldered. The solder joints should have a nice, smooth shiny flowing look to them. If they look blobby or crusty, re-solder them.
Post a picture if you're not sure.
MMM wrote:If you have voltage across C5 but not C4 it points (in my opinion) to one of the C4 connections. Since C4 and C5 share one connection it would be a good idea to start there.
Please check (without power) continuity from the "-" terminal of C5 (that's the one closer to C4) to the terminal of C4 directly in the corner (there's a trace connecting C5 via one of the pins of the regulator to C4).
twisted-space wrote:My mistake, I wrote C4 instead C3, I have 0v across C3. The trace goes from C5 -ve through C3 +ve to one pin of the regulator then on to one side of C4, I have continuity all the way across. I haven't fitted C4 yet. I also checked I have continuity from C3 -ve to the other side of where C4 will go.
MMM wrote:Do you have continuity of C3 -ve to the overall ground plane?
MMM wrote: If so, do you have continuity to D40 anode (the outermost diode)?
MMM wrote:Is there a name on the PCB? There have been different types of IOboard PCBs; and it's important that we know which one we are talking about.
twisted-space wrote:MMM wrote:Is there a name on the PCB? There have been different types of IOboard PCBs; and it's important that we know which one we are talking about.
Yep, it's MJB1ROLLIN.
MMM wrote:Ok, I'll look into this tomorrow. Please check D40 and D41 in the meantime.
if there is no switch in place
then that explains why its not working
MMM wrote:One problem with the kits is (or was) that different parts (most notably PCB's) were used that occasionally differed in some way (as you have already noticed). Another problem is that Mode Machines doesn't even have one single kit anymore (which makes it a bit difficult for me to debug things since I don't know the exact contents of the kits).
Which leads to another possible problem:
To save you from further frustration please check Q22 (the 2SC2291) and report the code printed on it.
twisted-space wrote:The code on Q22 is C2291 71G.
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