Yeah, the negative polarity part is important. In the 80s, those barrel jacks all had negative on the center pin, which is backward from what you’d expect. That changed at some point, and center positive is common now. So if you get a universal power adapter, make sure to flip the polarity. (Some come with a 3” adapter cable for that purpose.)
On Wed, Apr 1, 2020 at 4:47 PM Peter Vollan <dprogra...@gmail.com> wrote: > Before you go nuts and start recapping the thing, you should just > leave it plugged in overnight. To do this, you will of course need a > DC power adaptor: 6 volts DC, negative polarity. > > On Wed, 1 Apr 2020 at 12:41, me <m...@scifidan.com> wrote: > > > > > > I have never soldered a thing in my life. Nor have I ever bought > capacitors. > > > > Add this to a pile of retro gear 'tested' before I bought it to be dead > > or near doa. When will I learn? > > > > I'll have good luck if I can find time for this. If I do, I'll keep you > > posted. > > > > On 4/1/20 12:36 PM, B4 Me100 wrote: > > > Part of the fun is fixing the 100:) It sounds like it just needs a > tune > > > upS. > > > > > > Couple of things to look at are the internal NiCd (most likely dead) > and > > > some of the caps have possibly failed. There are a few great videos on > > > YouTube on how to replace both the NiCd and re-cap the board. This > should > > > give you a very stable board to start exploring. > > > > > > The fading display is indicative of a bad -5V supply which is generally > > > caused by bad caps. > > > > > > > > > On 1/4/20, 12:28 PM, "M100 on behalf of me" > > > <m100-boun...@lists.bitchin100.com on behalf of m...@scifidan.com> > wrote: > > > > > >> Excitedly, put off eating my sandwich to open my box. The T came in > its > > >> pleasure carrying pouch. I ran upstairs to fetch fresh batteries, put > > >> them in , and got welcomed by a 'low battery' light. The display > slowly > > >> fading. > > >> > > >> Huh? > > >> > > >> I brought it upstairs with me with four more fresh batteries to the > same > > >> thing. > > >> > > >> The screenshots on the ebay page showed the device working and the > basic > > >> display. I thought it was safe. But, now, I have a device that I don't > > >> know where to start on fixing it. > > >> > > >> Hints? > > >> > > > > -- Tom Wilson wilso...@gmail.com (619)940-6311 K6ABZ
