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Old 10-31-2010, 08:56 AM   #1
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Default Curtis Controller Components

Hello everyone, I have a bad Curtis controller 1204-410. i disassembled it and found a burnt transistor on the logic board. I can't read the numbers on the transistor because it is burnt. Does anyone have a schematic of this controller or knowledge of what this part is. It looks the same as the transistors on the power board that are screwed to the heat sink. It sits in a small heat sink on the logic board.
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Old 10-31-2010, 09:11 AM   #2
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Default Re: Curtis Controller Components

Got pics? Sounds like its the voltage regulator. Thats the only thing I know of on the control board that is heat sinked.

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Old 10-31-2010, 09:17 AM   #3
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Default Re: Curtis Controller Components

Its an LM317 adjustable voltage regulator. Couple bucks. (if it's what I'm thinking) If you know how you can get free samples.

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Roady, your brand of evil should be bottled and sold......for bunches of money.
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Old 10-31-2010, 09:23 AM   #4
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Default Re: Curtis Controller Components

Thanks Roady, what are the values, 48 to 12? I think Radio shack has these.
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Old 10-31-2010, 09:29 AM   #5
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Default Re: Curtis Controller Components

Actually, its less than a dollar. $0.65 at digikey for a Fairchild. I'm not sure if rat shack has those. I think I've looked before and all they had was 12VDC's and 5VDC regulators. It's not a "48 to 12" regulator. Should be a TO220 package.

Heres the datasheet. http://www.fairchildsemi.com/ds/LM/LM317.pdf

Mouser, digikey and Allied Electric will have em.

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Quote:
Originally Posted by azboo
Roady, your brand of evil should be bottled and sold......for bunches of money.
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Old 10-31-2010, 09:54 AM   #6
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Default Re: Curtis Controller Components

Thanks again Roady, I'm ordering it.
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Old 10-31-2010, 10:01 AM   #7
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Default Re: Curtis Controller Components

Quote:
Originally Posted by roady89 View Post
Its an LM317 adjustable voltage regulator. Couple bucks. (if it's what I'm thinking) If you know how you can get free samples.
Roady do you think or know if this is the only part differance between 1204 XXX 36v and a 48v controller. Or is this a gross over simplification.

Barry
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Old 10-31-2010, 10:11 AM   #8
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Default Re: Curtis Controller Components

Oh no, theres a big difference between the 2. You can't convert a 36 volt to a 48 if thats what your asking. (not easily or cheaply) You would have to redesign the control board. Replacing the fets and diodes with higher voltage parts is the easy part, its driving them thats a problem. I've done quite a bit of research into exactly that. It's not that easy or economical.

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Quote:
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Roady, your brand of evil should be bottled and sold......for bunches of money.
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Old 10-31-2010, 01:48 PM   #9
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Default Re: Curtis Controller Components

Found it at skycraft electronics. Repalced it and it blew again, guess i need a new controller. Anyone have one at a reasonable price? This is a 225 amp, I would consider a higher amp if the price is right.
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