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Coleco with screen out of sync may be...


Mauro72

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So, first off.. it's a PAL Coleco. I don't know too much about those.

 

You can test the VDP, but odds are your getting a signal. (Based on you screen shot.)

Is the a tuneable slug/inductor in the modulator? For channel freq.

The part you have circled is an old shcool inductor.

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In NTSC Colecovision, checking pin 36 of VDP chip right to center of a composite jack and GND in side should generate a stable black & white picture.

 

I don't know about PAL, but it could be the same.

 

If the picture isn't stable then the VDP chip is damaged and needs replacement.

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