Videonics Video Equalizer VE-1, psu build

Hello,
scored a VE-1 color modifier. It seems neat but has no power adapter…
It requires +5 vdc @ 600 mA and -5 vdc @ 500 mA.

I ordered an ac to dc +5,-5V 1.7 A dual output AC-DC switching power supply board.

I am trying to figure out how to wire it up to the mini din 5 pin connector. Does anyone have a VE-1 power supply they can test and give me a pin out?

What tests can I do to figure out how to properly wire it?

Is there a schematic floating around?

Any help is greatly appreciated. I don’t want to blow this pretty thing up. I really want to add it to my signal path to play colors :slight_smile:

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are you sure?
If you mean a videonics VE-1, mine has a 12AC adapter (left side on the back)
the right hand side din socket is for s-video
(I’m based in the EU, but I don’t think there will be that much difference in other countries…)

the backside tells me that it needs a 12v AC 800mA power supply.

see here for docs:

Thanks for the reply! They released different revisions with different power supplies. I happened to get a goofy one I guess. Below is a terrible pic, but lists the +5vdc -5vdc. Does your unit have mini din power connector or a barrel connector?

barrel. so there is the difference.
weird that they use those different power options. maybe there were several revisions.

you could open up the case to looks at the pin connections.
most PSU connections have capacitors to GND , like so:

so if the pin has a connection to the negative side of an electrolythic capacitor, it is the -5v input, positive connection is +5v
trace the pin routings through ferrite beads / resistors and maybe diodes.
Probably only 3 pins are used
maybe ask @bastien, he might know about these different psu connections?

Cool thank you! Im new to the electronics repair and building hobby. Cant wait to make video feedback loops with this puppy!

Pulled it apart today. Here are some pics of the board for those of you interested. Looks like this board may have been modified? Not sure if it was a factory or after market circuit change… hopefully i get this to work… if not its getting returned. Any tips on how to tigure out which side is positive and which side is negative on the capacitors off the power input would be greatly appreciated.

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Just a quick guide to help figure if your Videonics Video Equalizer is VE-1 or VE-1a

Videonics Video Equalizer VE-1 has a power switch at the top left on the face of the device and uses a power adapter with a mini din 5 pin connector.

Videonics Video Equalizer VE-1a does not have the power switch on the front and uses a power supply with a barrel connector.

Also, shout out to Logan at Tachyons Plus who has a great mod for this piece of gear.

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…i was investigating the same topic recently; it seems there were two revisions, one from 1991 with the +5V/-5V PSU and the other from 1993 with the 12V AC-AC PSU…

Do you think the wires and circuit modifications I pictured are from the factory?

…i’d say: yes…

(those wires look suspiciously like the ones used for bridges on my '93 PAL-version - and that free-form construction on the voltage-regulator (…))

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Thanks to you all and cyberboy666, I have now traced and figured out how to wire the plug up! Once my 5 pin mini din plug gets here, I’ll give it a shot and hope not to release blue smoke!! Lol ill provide a pin out once I have a working unit!

Sorry for the delay… Ive been over run at work, and believe the connetors I ordered never arrived.