520ST stuck in MONO mode

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PhilC
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Re: 520ST stuck in MONO mode

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@rubber_jonnie yes, absolutely fine on other STs.
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Re: 520ST stuck in MONO mode

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Do you have 12v on the RGB port ?
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Re: 520ST stuck in MONO mode

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exxos wrote: ↑Sat Apr 17, 2021 8:14 pm Do you have 12v on the RGB port ?
SO I had a few mins to look into this. This ST doesn't have 12v going to the monitor port by design and instead uses a 5v pullup arrangement for the mono mode selection.
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Re: 520ST stuck in MONO mode

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PhilC wrote: ↑Tue May 04, 2021 3:50 pm SO I had a few mins to look into this. This ST doesn't have 12v going to the monitor port by design and instead uses a 5v pullup arrangement for the mono mode selection.
Yeah normally like 10K to 12V pullup on the MONO pin.
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Re: 520ST stuck in MONO mode

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@exxos I'm actually wondering if its the VGA adaptor that doesn't work, so will make up a start cable to try it at some point.
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Re: 520ST stuck in MONO mode

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PhilC wrote: ↑Tue May 04, 2021 4:00 pm @exxos I'm actually wondering if its the VGA adaptor that doesn't work, so will make up a start cable to try it at some point.
I do test mono / RGB switches.
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viewtopic.php?f=17&t=1585 Have you done the Mandatory Fixes ?
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Re: 520ST stuck in MONO mode

Post by PhilC »

exxos wrote: ↑Tue May 04, 2021 4:05 pm
PhilC wrote: ↑Tue May 04, 2021 4:00 pm @exxos I'm actually wondering if its the VGA adaptor that doesn't work, so will make up a start cable to try it at some point.
I do test mono / RGB switches.
Of that I have no doubt. I've got lots more in the queue in front of this right now, re a V5 as you know :D
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