[Coco] Coco 1 displaying in B&W

[Al Hartman]

There are several Composite output mods for the Coco. Eventually, someone 
will make up kits and have them available.

In the meantime, they are not too hard to make on a piece of perfboard.

http://www.cocopedia.com/wiki/index.php/CoCo-1_composite_video

-[ Al ]-

-----Original Message----- 
From: Steve Batson

Vincent,

Certainly does not sound like the TV, though trying on another TV just to 
make certain would not be a bad idea if you haven't tried that already. Is 
the output to screen clear and fine other than not having color? This is 
really sounding like a good possibility that something is wrong inside the 
RF output circuit to me. I'd still reseat chips as recommended by others. 
Heck, I'd probably reset every socketed component. If none of that works and 
the system still won't do color, it might be worth trying to do a Composite 
Video Mod and bypass the RF circuit. I don't know if the mods currently 
being discussed on the list will work with the CoCo 1 or not.  Not sure how 
much $ or time you want to put into this, but a Composite Mod would help 
isolate the issue and yield better quality video in either case. Not sure 
what else to suggest myself, there's a lot of people on the list far more 
experienced with Video than myself, so hopefully enough suggestions will 
come to help you nail it down.


On Apr 19, 2015, at 5:11 AM, Vincent Tran <vincent at backhandsandwich.com> 
wrote:

> Hi Salvador - I've tested that TV with a Genesis and NES via coax and it 
> worked fine.
>
> Sent from my iPhone
>
>> On Apr 19, 2015, at 12:52 AM, Salvador Garcia 
>> <ssalvadorgarcia at netscape.net> wrote:
>>
>>
>> Vincent, have you tested that TV with some other AV device to verify that 
>> the TV is working ok? Salvador
>>
>>
>>
>> -----Original Message-----
>> From: Daniel Campos <daniel.campus at gmail.com>
>> To: CoCoList for Color Computer Enthusiasts <coco at maltedmedia.com>
>> Sent: Sat, Apr 18, 2015 1:58 pm
>> Subject: Re: [Coco] Coco 1 displaying in B&W
>>
>>
>> Make a fine tunning on your TV/Monitor and see if the colors shows up.
>> I imagine
>> that you are using an NTSC compatible TV right ?
>>
>> Daniel
>>
>> On 18/04/2015 15:40,
>> Vincent Tran wrote:
>>> Hi -- Just got back from Radio Shack with a RCA male to
>> RCA female and a
>>> coax male to RCA Male coupler.  I plugged it up to the Coco 1
>> and the video
>>> signal was definitely a lot better - there was no static like
>> before when I
>>> was using the Nintendo RF adapter.  Unfortunately, I still own a
>> TRS-80
>>> Black&White Computer.  Everything is still in B&W.  I tried both
>> channels 3
>>> & 4. Any other suggestions would greatly be appreciated.
>> Thanks,
>>> -Vincent
>>
>>
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