OK, this was all "my bad" but I managed to let a full output arc from my Spellman (also on our official super good guys list) into a scope probe due to an arc inside the tank to something the probe was on. This is my super-nice GDS 2204 DSO scope. The probe is toast, but before it opened up, looks like it arced through and fried the CH2 input board in the scope.
Fried the probe. Fried the scope channel - 4 resistors no tops. Most parts house marked. I hadn't registered for the "limited warranty" and heck, it was my bad anyway.
I tried calling the dealer I bought it from. They can't get spare parts. They sent me to the phone number for GW-America, which works, and I got hold of a real tech.
After trying to understand one another for awhile (he was obviously oriental), he just gave up and sent me the schematic for that board!
Really, that's almost unheard of. Only Spellman has ever done that for me in the past, after I agreed to not share their trade secrets (a promise I've kept). Now I don't have to guess what all the house-numbered tiny smd parts are, and can incircuit check things like protection diodes, and order new semi's as required - the schiz has real part numbers on it.
This makes me very happy! I can now fix this expeditiously right here, no shipping the thing back and forth and all that agony, along with labor and parts charges. All the fried parts appear to be simple stuff I have in stock or that is dirt cheap - resistors.
Note, I'm going to return the favor. Their email address listed for GW-Instek America does not work - it bounces with a 505, no relay allowed (presumably because it relays to Taiwan or something). But now I have the tech's email address, so I can tell them about it.