Are these things I should consider bad

[jr_tech]

Originally Posted by TinCanAlley

Now I tried scoping the other 240V boost.

I don't understand "other"... are you saying that the set actually has *two* sources of 240 Volt "boost voltage"... I suspect that there is only one source and it is distributed to other boards that may be marked "B+ or 240V", but these are boards where the 240V is used, not produced?
jr

Add: same for the 125V supply... two sources would seem to be unlikely.

[TinCanAlley]

Originally Posted by jr_tech

I don't understand "other"... are you saying that the set actually has *two* sources of 240 Volt "boost voltage"... I suspect that there is only one source and it is distributed to other boards that may be marked "B+ or 240V", but these are boards where the 240V is used, not produced?
jr

Yes, it comes from the same point. The SM lists them as boost(A) and Boost(B). Boost(B) gets extra treatment by way of a coil (peaking 550uh). Not sure what that does.

[jr_tech]

So "boost B" has more filtering and therefore less noise than "boost A"?

jr

[TinCanAlley]

Originally Posted by jr_tech

So *boost B" has more filtering and therefore less noise than "boost A"?

r

I don't know. I haven't gotten back to trying to get a trace. When I first tried, the settings used for boost(A) didn't work. I started upping the scan rate for the trigger and started to get something recognizable. I'll give it another shot tonight.

I figured the peaking coil might have done something that I need to compensate for.