[Coco] CoCo2 vs CoCo3 changes

[Zippster]

Someone on eBay has apparently.  Not sure the link will survive the list processing, but…

link <https://www.ebay.com/itm/TRS-80-Tandy-Color-Computer-2-Tandy-Color-Computer-3-Capacitor-Replacement-Kit/232472882664?hash=item362076ade8:g:~ocAAOSwmhJZqwGI:sc:USPSFirstClass!55021!US!-1&_sacat=0&_nkw=trs80+computer+capacitor+kit&_from=R40&rt=nc&LH_TitleDesc=0%7C0>

- Ed


> On Jul 18, 2018, at 12:14 PM, Kevin Becker <kevin at kevinbecker.org> wrote:
> 
> I don't suppose anybody has put together a CoCo3 capacitor kit to make it
> easy to order them all at once?
> 
> On Wed, Jul 18, 2018 at 1:11 PM, Zippster <zippster278 at gmail.com> wrote:
> 
>> Sounds like an electrolytic cap possibly.  Look at C54, a 470uF ac coupling
>> cap for the composite out as a possible suspect.
>> 
>> Any electrolytics in the signal paths I would swap out at this point just
>> to eliminate
>> them.  They usually work, but are way past their expected service life at
>> this point.
>> 
>> - Ed
>> 
>> 
>>> On Jul 18, 2018, at 12:06 PM, Kevin Becker <kevin at kevinbecker.org>
>> wrote:
>>> 
>>> At first the composite video was very wavy and noticeably worse than RF
>>> input but that seemed to clear up after it warmed up, strangely.  At one
>>> point composite seemed to stop working at all but it came back after a
>> few
>>> power cycles and swapping TV inputs a few times.  After giving up on
>> CoCo 3
>>> games I tried Buzzard Bait, which I knew worked on my CoCo 2, and I could
>>> hear it playing but the screen wasn't updating and was a little out of
>>> whack.  When I went back to RF Buzzard Bait played fine.
>>> 
>>> 
>>> 
>>> 
>>> 
>>> On Wed, Jul 18, 2018 at 12:56 PM, rietveld rietveld <
>> rietveldh at hotmail.com>
>>> wrote:
>>> 
>>>> 'composite issues '?   ‎Does it display in a semi black and white?   I
>>>> found that my coco3 and Dragon 64 both have display issues with certain
>>>> tv/monitors that use comp in.   Some work perfectly others didn't
>>>> 
>>>> Sent from my BlackBerry 10 smartphone.
>>>> Original Message
>>>> From: Kevin Becker
>>>> Sent: Wednesday, July 18, 2018 11:10 AM
>>>> To: CoCoList for Color Computer Enthusiasts
>>>> Reply To: CoCoList for Color Computer Enthusiasts
>>>> Subject: Re: [Coco] CoCo2 vs CoCo3 changes
>>>> 
>>>> 
>>>> Thanks, these look great.
>>>> 
>>>> Apparently my new CoCo 3 isn't working so well though so it may be some
>>>> time before I really get to dig into it.  I plugged it in last night and
>>>> had a lot of weird composite video issues.  Maybe it just doesn't like
>> my
>>>> TV.  The RF output seems to work fine.  I haven't been able to
>> successfully
>>>> run any CoCo 3 software either though.  It seems to crash or not load at
>>>> all.  I did run a memory test successfully so I've got some digging to
>> do
>>>> to figure out what is going on.
>>>> 
>>>> On Wed, Jul 18, 2018 at 7:22 AM, Frank Swygert <farna at amc-mag.com>
>> wrote:
>>>> 
>>>>> On 17/7/2018 14:02, Kevin Becker wrote:
>>>>>> So I finally broke down and bought a CoCo 3 on eBay.  It arrived today
>>>>> but
>>>>>> I haven't had a chance to try it out yet since I'm at work.  It
>>>> suddenly
>>>>>> occurred to me though that I don't actually know that much about the
>>>> CoCo
>>>>>> 3.  I had a CoCo 2 back in the 80s and I bought a CoCo 2 last winter
>>>> that
>>>>>> I've been having fun with.
>>>>>> 
>>>>>> I know it has more RAM, different keyboard layout, composite and RGB
>>>>>> video.  I know the GIME provides better graphics.  Anything else I
>>>> should
>>>>>> know?  I'm especially curious about the MicroWare additions to BASIC
>> to
>>>>>> support the improved graphics.  Should I just RTFM or is there any
>> sort
>>>>> of
>>>>>> quickstart list of things to know for someone upgrading from CoCo 2 to
>>>> a
>>>>>> CoCo 3?
>>>>> 
>>>>> =========================================
>>>>> 
>>>>> The "Unravelled" series of books for all three CoCos are in the link
>>>>> below. You might want to start with the "Super Extended BASIC
>> Unravelled"
>>>>> to see how all the new commands work.
>>>>> http://www.colorcomputerarchive.com/coco/Documents/Books/Unravelled%
>>>>> 20Series/
>>>>> 
>>>>> This should help also. Was printed right after the CoCo3 came out:
>>>>> http://www.colorcomputerarchive.com/coco/Documents/Books/Coco%20III%
>>>>> 20Secrets%20Revealed%20(Microcom%20Software).pdf
>>>>> 
>>>>> 
>>>>> --
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>>>>> Coco at maltedmedia.com
>>>>> https://pairlist5.pair.net/mailman/listinfo/coco
>>>>> 
>>>> 
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