Colecovision Power Supply
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I recently picked up a Colecovision for my collection at a local garage sale. Unfortunately, I only get black screen; no sound or video. After some testing I see that my power supply is putting out the correct voltages (+5, -5, +12) UNTIL I flip the switch on at which point the +5 drops to .8 with the load.
I cracked open the power supply and was surprised by all of the components inside! Does anyone have any suggestions on how to find the faulty component?
Thanks so much,
Matt[/u]
I cracked open the power supply and was surprised by all of the components inside! Does anyone have any suggestions on how to find the faulty component?
Thanks so much,
Matt[/u]
- eurddrue
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Well, I'm no colecovision expert, but if you could show some pictures, buy another power supply, or do something of the sort to be helpful to us? I think I worded that wrong, something to help us figure out your dilemma, would greatly be appreciated.
If it were me I would wait 24 hours and try again, maybe it has an automatic fuse shutoff so you dont fry your system like the n64. Try it on different tvs i guess, or if a friend has a colecovision, try using his/hers.
If it were me I would wait 24 hours and try again, maybe it has an automatic fuse shutoff so you dont fry your system like the n64. Try it on different tvs i guess, or if a friend has a colecovision, try using his/hers.
Banned indefinitely if you desperately need to contact me STOPPHONESPAMPLOX Please dont be a dick and call for something random like "HEY YURDRUE DOO U HAZ SPAM?"
wallydawg wrote:I think we should check to see if you can withstand 220 voltschainfire95 wrote:220V I believe
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If I were to buy another power supply, I don't think I would have a problem anymore.
Seriously, though, I have read that Colecovisions are well known to have problems with their power supplies. I was hoping someone here has had experience repairing them and could point me to a common issue (i.e. one of the power transistors, etc.) that would cause my +5v line to drop as soon as I switch on the power.
Seriously, though, I have read that Colecovisions are well known to have problems with their power supplies. I was hoping someone here has had experience repairing them and could point me to a common issue (i.e. one of the power transistors, etc.) that would cause my +5v line to drop as soon as I switch on the power.
Holy crap, you opened the power supply?! You love to live dangerously, don't you? One of the first things I learned in computer class is NOT to open monitors or power supplies, as they're both filled with electric death. And not the cool kind that clears the screen of flippers in Tempest 2000, either.
I suppose there's a way to drain the charge with a very large capacitor, but I don't remember the specific details. I just keep CRT monitors closed, because I don't want to look like Yahoo Serious for the next five weeks.
I suppose there's a way to drain the charge with a very large capacitor, but I don't remember the specific details. I just keep CRT monitors closed, because I don't want to look like Yahoo Serious for the next five weeks.
I accidentally touched an open power supply once. got 120V AC sent through me. That was an unwelcome surprise.ArugulaZ wrote:Holy crap, you opened the power supply?! You love to live dangerously, don't you? One of the first things I learned in computer class is NOT to open monitors or power supplies, as they're both filled with electric death. And not the cool kind that clears the screen of flippers in Tempest 2000, either.
I suppose there's a way to drain the charge with a very large capacitor, but I don't remember the specific details. I just keep CRT monitors closed, because I don't want to look like Yahoo Serious for the next five weeks.
- Dr. KillGood
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- Dr. KillGood
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It's not just about the power supply being unplugged. Every power supply that I've seen had a capacitor or two which will hold a charge for DAYS after power is removed. If you happen to touch between the two leads you'll get a nasty shock, sometimes in the thousands of volts! Same thing with CRT televisions/monitors. That's the main concern, the charged capacitors.
Yeah, if I were you I'd just grab an old AT (that is, non-ATX) style PC power supply and rig that up a connector for testing.
Oh, and from what I've read the switches themselves on the Colecovision have issues. Maybe it's shorting out somewhat?
Yeah, if I were you I'd just grab an old AT (that is, non-ATX) style PC power supply and rig that up a connector for testing.
Oh, and from what I've read the switches themselves on the Colecovision have issues. Maybe it's shorting out somewhat?
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- Dr. KillGood
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Having more Amps is always ok. Just don't go over on Volts! It's just the way things work: you always want your Voltages as CLOSE as possible and Amps supplied to be at LEAST as much as the demand.
It should be fine. Just double-check all your connections before you power the thing up. And let us know what happens!
It should be fine. Just double-check all your connections before you power the thing up. And let us know what happens!