> On 20 October 2015 at 22:12 Ian Primus <ian.primus.c...@gmail.com> wrote: > > > I can't seem to get the link to work with the pictures, so I don't > know what the tube looks like, but sticky fluid is NOT an indication > of a problem with the tube. Some tubes used a bonded safety glass, and > that goo leaks out over time. But I've never seen a VT100 with such a > tube installed. The most common cause of goo on the tube is going to > be goo surrounding the 2nd anode connection (the suction cup). This is > the plasticizers leeching out of the anode wiring, and gooing up the > tube. The cable will be all sticky too. You can clean it off, I find > that brake cleaner will dissolve it nicely. Just clean the area around > the connection, don't clean the graphite coating off the main parts of > the back of the tube - scrub only the clear glass areas. > > Without knowing what parts you have, I can't really tell you more than > that, but, in general, I find that VT100's tend to work fine. There's > nothing special I would do, just hook everything up and try it out. > You're not going to blow anything up, assuming you've got parts > connected properly. > > -Ian > > On Tue, Oct 20, 2015 at 12:11 PM, Lukas Kaminski > <lukas.kamin...@krankikom.de> wrote: > > Hello list, > > > > i got hands on several VT100 and VT105 parts. It SEEMS (at least to me) > > to be one complete terminal without a power supply and some additional > > parts. I took pictures of everything, which can be seen here: > > https://antares.krankikom.de/index.php/s/vcIZuHbpsn3lSoL > > (sorry for the self-signed certificate) > > > > I already found this interesting page: > > https://github.com/bbenchoff/VT100Adapter, so i guess i have everything > > to try to repair the VT100. > > > > But i never tried something like that, and i fear to break something as > > soon i connect anything to power. > > > > How should i start? I especially don't know how to clean the boards, > > check the eproms and i'm afraid that the CRT is broken, since it has a > > sticky fluid on it. > > > > Bye, > > > > Lukas Kaminski
I couldn't get the link to work either, I could only get parts of the images. I too saw leakage from around the anode cap. I have been advised to get all that cleaned up (isopropyl will do I think), and then, iirc, re-grease the anode cap, although I am not at home to check and I can't remember what kind of grease you need to use for that. I would be careful about just powering it on in case there is something bad somewhere that blows a component that can't be replaced (I believe flyback transformers fall into that category). So I would check all the PSU and video control board electrolytic capacitors in particular, and probably re-form them. I would also use a dummy load to test the PSU to make sure it is producing the right voltages without too much ripple. Once all that checks out, I would power it up one part at a time, leaving the video control board to last but one, and then the tube (and flyback) to last. At least, this is what I did, and suffered no ill effects, although I did have to re-cap the video control board to stop a screen wobble. My VT101 and VT102 were one of my rare successes, with a lot of help from another list member though! Regards Rob
