On 10/6/09, M H Stein <email@example.com> wrote: > Ah, so the 9" non-CRTC monitors are all the same frequency/polarity after > all? That was certainly my understanding. Mine as well. > Clever and convenient, the way the power pins are arranged; I'll have to > look at my 4032 & 8032 to see if they're the same. AFAIK, they are the same - there's one 5-pin harness design and one 8-pin design with a key pin - all the way up to the SuperPET > Make sure they're clean and good tension on the socket. Old PC power > supply connectors work well when the PET one burns up... Yep. I've seen plenty of oxidized connectors. > I never looked, but you're right; I've got two 2001-8s and one has the > rectangular holes and the other the triangles. Didn't I send you any (8) > washers with that board? I have the 6-32 hardware for bolting down the 7805s, but since I removed the drilled-out pop rivets just recently, I think I would have noticed any thin washers. I was _expecting_ thin washers there, but I couldn't verify them from any photographs I could find on the web. > I don't see any plastic washers, but there are > thin (metal?) washers around the rivets between the heatsink and the PCB, > lifting the heatsinks so they don't touch the pads (although there's still > very little clearance around the leads). Right. Just lifting the heatsink a wee bit off the board would take care of the issue. > The board with rectangular holes > is a little later than the triangle one, so maybe they did have a few boards > come back that had had 9V Vcc on them... Perhaps. As I said, the same style of heat sink is on the video board from this later (2001N/3032) PET with the rectangular hole. I did find a photo of a 2001-8 with rectangular holes in the heat sinks, and they are identical in proportion to the ones in my present monitor. > Sounds like you're almost there; good luck with that video issue. I think so. > Let me know if I can help (with waveforms or whatever). I will let you know. I do have other working TTL-video PETs, so I can do a side-by-side comparison of the video chain to backtrace where things go off the rails, but essentially, I need to spend more time understanding the video timing chain anyway. -ethan Message was sent through the cbm-hackers mailing listReceived on 2009-10-06 16:00:04
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