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Re: expected outcome of a dumb mistake

From Daniel <me@sc1f1dan.com>
Newsgroups comp.sys.tandy
Subject Re: expected outcome of a dumb mistake
References <87k00rccyy.fsf@sc1f1dan.com> <d951f43f-7213-444b-8fe1-f11fb7f127e5n@googlegroups.com>
Message-ID <87fsbac9um.fsf@sc1f1dan.com> (permalink)
Organization Newshosting.com - Highest quality at a great price! www.newshosting.com
Date 2023-02-13 07:17 +0000

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Walt Perko <r4rguy@gmail.com> 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.

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Thread

expected outcome of a dumb mistake Daniel <me@sc1f1dan.com> - 2023-02-09 11:09 +0000
  Re: expected outcome of a dumb mistake Walt Perko <r4rguy@gmail.com> - 2023-02-10 02:53 -0800
    Re: expected outcome of a dumb mistake Black Epyon <Blackepyon01@yahoo.ca> - 2023-02-10 07:55 -0800
      Re: expected outcome of a dumb mistake Walt Perko <r4rguy@gmail.com> - 2023-02-10 08:09 -0800
        Re: expected outcome of a dumb mistake Daniel <me@sc1f1dan.com> - 2023-02-13 07:21 +0000
      Re: expected outcome of a dumb mistake Daniel <me@sc1f1dan.com> - 2023-02-13 07:19 +0000
    Re: expected outcome of a dumb mistake Daniel <me@sc1f1dan.com> - 2023-02-13 07:17 +0000
      Re: expected outcome of a dumb mistake Black Epyon <Blackepyon01@yahoo.ca> - 2023-02-13 07:42 -0800
        Re: expected outcome of a dumb mistake Walt Perko <r4rguy@gmail.com> - 2023-02-13 10:38 -0800
        Re: expected outcome of a dumb mistake Daniel <me@sc1f1dan.com> - 2023-02-15 09:56 +0000
          Re: expected outcome of a dumb mistake Walt Perko <r4rguy@gmail.com> - 2023-02-15 03:35 -0800
            Re: expected outcome of a dumb mistake Daniel <me@sc1f1dan.com> - 2023-02-17 07:30 +0000
          Re: expected outcome of a dumb mistake Black Epyon <Blackepyon01@yahoo.ca> - 2023-02-16 01:01 -0800
            Re: expected outcome of a dumb mistake Daniel <me@sc1f1dan.com> - 2023-02-17 07:31 +0000
              Re: expected outcome of a dumb mistake Walt Perko <r4rguy@gmail.com> - 2023-02-17 03:56 -0800
                Re: expected outcome of a dumb mistake Daniel <me@sc1f1dan.com> - 2023-02-20 10:18 +0000
                Re: expected outcome of a dumb mistake Daniel <me@sc1f1dan.com> - 2023-03-01 07:21 +0000
                Re: expected outcome of a dumb mistake Walt Perko <r4rguy@gmail.com> - 2023-03-01 15:56 -0800
          Re: expected outcome of a dumb mistake Daniel <me@sc1f1dan.com> - 2023-02-17 07:33 +0000

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