ATARI 1040 STe black RGB good Composite

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zChris
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Re: ATARI 1040 STe black RGB good Composite

Post by zChris »

Opps i mixed the two signals. It's the Horizontal signal that's the bottom picture. The Horizontal at the chips seems correct though, i'll see if i can get a picture.
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Re: ATARI 1040 STe black RGB good Composite

Post by rubber_jonnie »

zChris wrote: Wed May 04, 2022 8:44 pm Opps i mixed the two signals. It's the Horizontal signal that's the bottom picture. The Horizontal at the chips seems correct though, i'll see if i can get a picture.
I can see you measured the 50Hz v-sync signal, but did you measure the h-sync signal, and if so, what was it?
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zChris
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Re: ATARI 1040 STe black RGB good Composite

Post by zChris »

Solved! It was the resistor that has somehow broken. Nothing that i can see visually though. but when i bodge over the resistor for Horizontal i get a picture :)
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Re: ATARI 1040 STe black RGB good Composite

Post by exxos »

zChris wrote: Wed May 04, 2022 9:14 pm Solved! It was the resistor that has somehow broken. Nothing that i can see visually though. but when i bodge over the resistor for Horizontal i get a picture :)
:bravo:

What resistor are you referring to exactly ? IIRC there are no resistors on V&H sync ?
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zChris
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Re: ATARI 1040 STe black RGB good Composite

Post by zChris »

This is the resistor om talking about:

dsOpmPB.png
dsOpmPB.png (218.13 KiB) Viewed 1033 times

since the ohm is so small i'm thinking on just having a wire there instead :?
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