Path: csiph.com!weretis.net!feeder6.news.weretis.net!usenet.blueworldhosting.com!feed1.usenet.blueworldhosting.com!peer01.iad!feed-me.highwinds-media.com!news.highwinds-media.com!fx11.iad.POSTED!not-for-mail From: Daniel Newsgroups: comp.sys.tandy Subject: Re: expected outcome of a dumb mistake References: <87k00rccyy.fsf@sc1f1dan.com> Message-ID: <87fsbac9um.fsf@sc1f1dan.com> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/27.1 (gnu/linux) Cancel-Lock: sha1:FXEL3RcP+56KOWi/YvFWAZ3QMVQ= MIME-Version: 1.0 Content-Type: text/plain Lines: 63 X-Complaints-To: abuse(at)newshosting.com NNTP-Posting-Date: Mon, 13 Feb 2023 07:17:53 UTC Organization: Newshosting.com - Highest quality at a great price! www.newshosting.com Date: Mon, 13 Feb 2023 07:17:53 +0000 X-Received-Bytes: 3624 Xref: csiph.com comp.sys.tandy:660 Walt Perko writes: > On Thursday, February 9, 2023 at 3:09:11 AM UTC-8, Daniel wrote: >> Bought my first 100 in 2020 from eBay - instantly had problems and today >> they still exist but I've recently identified a solution. A second >> 100 came as an inexpensive 'for parts' unit that ultimately worked fine >> - the seller didn't have the memory switch set to 'on' and thought it >> was dead. The thing works like it's fresh out of the factory. Guys, I >> learned that I made a big mistake. Got my 200 from the bitchin100 list >> soon after getting my 100's and made that my daily driver. The 100s >> found a home in the closet next to the board games. >> >> I decided today to register them all with Web8201. I cracked one open >> for the first time. without thinking too much about the insides, >> stupidly, and opened it to get the necessary serial and version numbers >> to provide good registration info. As I was screwing her back together, I >> decided to inspect it for problems. Looked at the battery and, on >> initial inspection, it looked okay. Looking closer I found residue on >> the side of the battery, then residue on a number of via's where the nearby >> resistors are soldered in. CRAP >> >> I should have inspected it two years ago but it just sat on my closet >> and I can't help but think maybe it only leaked after i got the >> device. Again, I turn it on and it works great. I just wish I wasn't so >> stupid as to ignore the inspection two years ago. Or, at least, I wish I >> had at least removed the internal battery when I got it. Just stupidity >> here. BONK So now I have some soldering and cleanup to do. I assume the >> resistors should be replaced. >> >> I went ahead and excised the motherboard from the shell for deep >> inspection. As you can see, there are some leaking caps, residue, and >> some impacted traces. I have some restoration work to do and some >> components to order. This will be the first time I restore the bad traces. >> >> Pictures: >> >> https://imgur.com/zn3fV4G.png >> https://imgur.com/m6yzNzm.png >> https://imgur.com/nWw3JNh.png >> https://imgur.com/yMlMc5L.png >> https://imgur.com/mbyV6xB.png >> https://imgur.com/m1Uc6ez.png >> >> Daniel > > Hi, > > Don't replace any resistors unless they are physically damaged. > Resistors don't go bad unless too much power is sent through them, > then they easily appear damaged. I already got an earful from the bitchin100 list members. The resistors will be removed to make cleaning easier, but I'll be resoldering them in once the board is clean. > Capacitors on the other hand can be a problem, but test the circuit one capacitor at a time with an oscilloscope. I don't have an oscilloscope and if I did, I have no idea how to use one. I suppose I could learn. > Good Luck. Thanks. It'll be fun.