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New power supplies for the ColecoVision?

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57 minutes ago, -^CrossBow^- said:

Well, I have another post elsewhere, but my ColUSB fried itself when I used an Apple iPad charger to power it up. Seems the iPad charge has both a 12V and 5v mode on it and it requires a device to be smart enough to tell it to only provide 5v else it will shoot over 12v. So what happened in my case was that my setup was fine while it was plugged in and in use. But once I shutoff the Colecovision and unplugged the ColUSB from the back of it, but did NOT unplug the iPad charger going into it, it built up a ton of heat on the internal regulators inside the ColUSB (Enough to warp the plastic housing) and fried. Plugging it in only produces +12 from the ColUSB now. Dragonbox has offered to look at it and possibly replace it but as you noted, the shipping is crazy costing nearly the same as the item itself so, for now I will hold off on sending it back to them and see what this newer supply solution is like. 

 

I will likely use it as part of my bench supply setup since it is small enough to not take up too much space. That is what my ColUSB was for was for bench testing supply use instead of keeping one of the large CV bricks on hand.

 

I saw your post.  That sounds like what's happened to peoples TurboGrafx Mini.  Never a good idea to use a modern phone charging brick for that reason.  I'm not in a rush, my original brick still works but it's flaky. 

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1 hour ago, -^CrossBow^- said:

Well, I have another post elsewhere, but my ColUSB fried itself when I used an Apple iPad charger to power it up. Seems the iPad charge has both a 12V and 5v mode on it and it requires a device to be smart enough to tell it to only provide 5v else it will shoot over 12v.

If that's the case, the iPad charger violates the USB standard.  A USB device must NEVER send more than +5V until the connected device negotiates for more.  It also must be limited to some maximum amperage (originally 500mA, but I'm pretty sure that's been increased) until the device (and the cord also needs to support it) negotiates for more.

 

You should make sure your iPad charger is legit and not counterfeit.  Even if it is, it may be malfunctioning.

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6 minutes ago, ChildOfCv said:

If that's the case, the iPad charger violates the USB standard.  A USB device must NEVER send more than +5V until the connected device negotiates for more.  It also must be limited to some maximum amperage (originally 500mA, but I'm pretty sure that's been increased) until the device (and the cord also needs to support it) negotiates for more.

 

You should make sure your iPad charger is legit and not counterfeit.  Even if it is, it may be malfunctioning.

Brand new iPad charger that came directly out of the iPad box. I just know that I had used it in the past without any issues but this one time, I left it plugged into the ColUSB but didn't have the ColUSB plugged into the CV just sitting there. Went back to it a few hours later and noticed the ColUSB was very warm to the touch and the plastic housing has begun to warp apart on it. Unplugged it and let it cool off which mostly brought the plastic back into shape again. Then plugged it into a parts donor CV to test with it and measured the voltages from the back of the input connector. Only the +12 was coming through on the ColUSB. Advised the guys that make it and they told me that my 12watt iPad charger was too much for it without a load and likely killed it. They also made mention about their warning on the small manual to always unplug your power source from the ColUSB when you aren't using it but it doesn't specifically state why.

 

So I agree with you that the amount of current and voltage shouldn't have been more than the device required. Physically everything on it looks fine but it heats up very quickly if you plug it in to use it so something nuked internally on the ColUSB causing an internal short somewhere. It does have about 3 small SMD VRs on it if I remember to control the various voltage ouputs to the CV. Both the -5 and +5 were dead on mine and again only the +12 works on it. My guess is that is the +12 from the iPad charger being passed through the device or that is the only regulator actually still working and the two burned out.

 

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2 hours ago, -^CrossBow^- said:

Advised the guys that make it and they told me that my 12watt iPad charger was too much for it without a load and likely killed it. They also made mention about their warning on the small manual to always unplug your power source from the ColUSB when you aren't using it but it doesn't specifically state why.

Okay, "Without a load".  Yeah, power supplies built as current delivery sources tend to croak without a load.  In electronics lab, there was a type of power supply that we were told not to operate at all without a load on it.  At least place a resistor across the outputs before you turn it on.  I wonder what this device uses?  I guess I could disassemble mine and note the chips.

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48 minutes ago, ChildOfCv said:

Okay, "Without a load".  Yeah, power supplies built as current delivery sources tend to croak without a load.  In electronics lab, there was a type of power supply that we were told not to operate at all without a load on it.  At least place a resistor across the outputs before you turn it on.  I wonder what this device uses?  I guess I could disassemble mine and note the chips.

Chips on what? The ColUSB? Not much there as I recall. Some capacitors for filtering and I think 3 SMD VRs. Likely for the +5,-5, and +12v for the CV. Likely some other stuff there as well but not a whole lot to it. They are very easy to open as the two plastic halves are just snapped together and will come apart easily. Or at least mine do.

 

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1 minute ago, -^CrossBow^- said:

Chips on what? The ColUSB?

Yeah that's what I meant.

 

TPS630701 buck-boost and LMR64010 simple switcher are the power chips on the top side.  The TPS630701 goes into power save mode with low load current and can take input voltages as high as 16V, so it should not die so easily  It's probably the +5V generator.  The LMR64010 can take input voltages as high as 14V.  It's probably the 12V generator.

 

The one on the back reads NUB 83F S57J  I can't find anything about this, but it's probably the negative voltage converter.

 

But that means it's not immediately apparent what went wrong.  Neither of them list issues that come from no-load situations, and even if the USB throws 12V, both of the identified converters can take it.

 

Maybe it's an ESD issue?

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Posted (edited)

This is why some EBAY and Amazon dealers only sold the Col USB adapter bundled with a high-end cable and charger. Some USB chargers can push up to 100 watts by doing 20 volts at 5 amps if there is a malfunction in the communication data stream.  There are problems using the Col USB with certain USB chargers and cables. The best solution was the 17 Watt 3.4 amp USB power supply solution that has zero heat to the Col USB plug when there is no load. Also a small amount of normal heat with a load.

 

Now there is an issue with ordering the Col USB from Germany and not seeing the product show up when placing a large order. That is one of the reasons consumers cannot purchase the Col USB from any USA dealer since they cannot get large QTY’s imported into the USA. It would have been ideal to give consumers a choice of two different ColecoVision Power Supplies to choose from. The only advantage of the Col USB plug is its attractive modern look of being able to use USB for power. However, there are much better higher quality power supplies to use for the ColecoVision using the old fashion custom 4 pin plug that first appeared on the T-99 computers and ColecoVision in the early 1980’s.

 

 

 

Edited by HDTV1080P

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Stone Age is back out of stock, so I don't know if that was an accurate stock thing or not.  In any case, I think I'll probably give the Mean Well thing a shot instead.

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