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Snow grey screen


Vendoefel

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Hello,


I'm from Belgium so me English is not so good (I have help from Google translate) :-)


My dad gave me his 2 old colecos I hooked them up on the TV but they both gave no image.


I'm now working on the first coleco, I desolderd the on/of switch cleaned him en soldered it back on.

There is an image now on the TV but it is snowy grey and no sound (c picture)


What could be the problem or next step to do ?


thanks


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  • 2 weeks later...

I just bought a composite A/V mod kit from ebay PAL version from http://www.ebay.com/itm/182205220905?_trksid=p2060353.m2749.l2649&var=484186335568&ssPageName=STRK%3AMEBIDX%3AIT

 

Hopefully that will work for me.

It may or may not. I have found colecos need a fully functioning rf to get a comp mod to work as it is just using those signals from the rf board and do not decode further down the line like at the vdp and sound chips. The video section on the rf for me is extremely difficult to understand.
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​Just a shot in the dark here, but I think if your getting signal on Ch1, in Belgium, your on different broadcast frequencies for your channels.

 

Soo, that means your RF is most likely working fine, if you do the composite mod it should work.

It's like trying to get a Japanese Famicom to work in North America, it can be done, but easier to do composite, vs an RF channel shift.

 

I caution on using the Transistor mod, and recommend the LM318 one, the transistor can have a very short lifespan.

 

Good luck.

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Yesterday i finally received the kit and installed it today.

 

but unfortunately the image is not what i expected.

I have colour now instead of snow :)

Only the colour is generally blue and almost no other colours.

 

The sound works perfect !!

 

Next possible option ?

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Edited by Vendoefel
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