Quoted from bikefreak:On to the next issue.
Do I go the flaky DMD or the double flipper = reset? (ordered the KAHR daughter board which will potentially differ needing to do the double flipper reset)
My KAHR board comes today. But still managed to go through pinwiki and troubleshoot the double flipper reset problem. Did most of the easy stuff and things checked out ok enough. I didn't change pins/connectors and fully expect them to be the issue. (or at least a strong contributor to it) Kept plugging through the list and read about the Z connector. Then kept going down the list. Getting done/checking all the easy stuff. No fixes found yet... Now needed to consider doing the harder steps... Then recalled I never reset the Z connector. Did that and "fixed" the issue. I know connector resets are temporary fixes. Removing the Z connector would fix it for good.
Here are some of the readings I got.
TP1 14.14v (12vu) (what does the vu stand for? unregulated voltage? if so, what does that mean?)
TP2 4.912v (5v)
TP3 11.96v (12v)
TP6 75.5v (50v but 75 is "normal" per wiki)
TP7 22.45v (20v)
TP8 17.6-18.2 (18v) this floated around quite a bit. Not sure if that is normal or not.
CPU pin 32 4.872v (5v)
BR2 8.5v (top left lead) I didn't know how to hook DMM up for other BR test(s)
My understanding is 5v feed is main driver for double flipper resets and 4.9+/- is probably cutting it close to the cutoff which is why it has been resetting.
Some solder joints were touched up on driver board so those are looking good.
So, based on the above, anything I should check out further? My thoughts are:
1) Replacing pins/connectors would be a good course of action
2) Remove Z connector and hardwire
3) Reassess
4) Replacing the LM323K 5V regulator with more modern one sounds like a good idea
5) I do have some of the blue capacitors (Philips) (not on MPU board but on Power driver (and sound? board)) Sounds like they are a common failure point but I don't know what failure behavior results in.
With this all said and about to put in the KAHR board, is any of this necessary? (sounds like no based on my reading)