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Old 6th September 2012, 06:50 AM   #91
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Join Date: Sep 2012
Dear Frens,

Can someone tell me where can i buy that U2 VIPer100a ? what do i call it when i tell the guys at the parts shop? what Brand do they have? Please help.

I have an Infocus SP7200 Projector with the same Power problem.
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Old 27th December 2012, 01:54 PM   #92
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You can call it PWM MOSFE, ST is a good choice of brand.
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Old 13th August 2013, 05:01 AM   #93
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man I wish my infocus issue was this simple, mine is a little newer but same issue like all the others, no power when plugged in, nothing at all. replaced all the caps with Panasonic's and still nothing..

Now I'm close to just replacing the power supply with a model near this one, on the power supply it says O/P 5v/0.15A 12v/3.6A I assume I find a board with those specs and maybe swap a few connectors out my projector should be working again?

I think it's a shorted SMPS transformer but not one is really telling me if one side of the transformer should all be shorted..
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Old 14th August 2013, 01:57 PM   #94
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Usually a problem w/caps and power transistor.

Here's a complete one listed on eBay.

InFocus Projector Power Supply LP650 SP5700 SP7200 SP7205 SP7210 Knoll Toshiba | eBay
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Old 19th August 2013, 01:10 AM   #95
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Quote:
Originally Posted by Gcalo View Post
Usually a problem w/caps and power transistor.

Here's a complete one listed on eBay.

InFocus Projector Power Supply LP650 SP5700 SP7200 SP7205 SP7210 Knoll Toshiba | eBay

That power supply looks nothing like mine, it has 9 wires that connect to the main board, I replaced all the caps with no luck.
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Old 19th August 2013, 05:15 PM   #96
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The seller may not be showing the actual unit.

Have you replaced the main power transistor?
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Old 19th August 2013, 05:17 PM   #97
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I checked it and nothing is wrong with it..

mine looks like this

Click the image to open in full size.
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Old 19th August 2013, 05:25 PM   #98
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Your viper100a is missing. You need this plus you have to replace the shorted rectifier secondary diode. Plus rebuild the 13v viper vcc regulator that blows with it.
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Old 19th August 2013, 05:28 PM   #99
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Quote:
Originally Posted by mbates14 View Post
Your viper100a is missing. You need this plus you have to replace the shorted rectifier secondary diode. Plus rebuild the 13v viper vcc regulator that blows with it.

I took it out and it's not a viper100A it's a MR4010 it would be nice if I could find them within the U.S. however they are expensive because I have to get them from China or the U.K. and at $8 a IC it's not cheap.. once you take it out it's impossible to save the legs.

But it leaves me back to square one.. no 12V or 5V output.
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Old 19th August 2013, 09:07 PM   #100
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I have purchased them from Mouser.

I will find the P/N and post it.
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