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DWINs will not work on 220 volts?!??

 
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Curt Palme
CRT Tech


Joined: 08 Mar 2006
Posts: 24396
Location: Langley, BC

TV/Projector: All of them!

Posted: Thu Jul 31, 2008 7:59 pm    Post subject: DWINs will not work on 220 volts?!??

So I sold a DWIN 500 to Germany to run on 220 volts. There are internal jumpers on the power supply board that distinctly tell you which ones to put on or off for 110 or 220 volts. That was the last thing I did before sending the set out.

Customer emails, says that the set ran for about 30 seconds, then died, green power LED is flashing rapidly, which means an overload in the set somewhere.

Curious, I tried duplicating the problem here on a 700. THe set ran on 220 volts for 5 minutes, nice pix and all, then BANG and the set went dead, rapidly flashing green light. Electrolytic caps are smoking hot in the SMPS, telling me that this power supply will NOT work on 220 volts despite what the board says. It also managed to short something out on the motherboard, I'm checking into that now.

Happy day, between that and the missing 909 boards..... eff me!
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Tom.W



Joined: 09 Mar 2006
Posts: 6635


Posted: Fri Aug 01, 2008 12:57 am    Post subject:

Here's a copy of the operation manual but it seems to contradict itself ?

http://dwin.com/files/manual_hdp500.pdf

Look at page 4 and 5.
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JayAllan



Joined: 03 Jun 2007
Posts: 175
Location: Los Angeles

Posted: Mon Aug 04, 2008 1:19 am    Post subject:

Why don't you just check with DWIN?

NOT! Thumbs Down

I hope you have a stockpile of these DWIN power modules. Seems like the weak link on these PJs.

I was lucky I scored a spare HD700 for $175, but I have already used it's power supply.

Sad
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Curt Palme
CRT Tech


Joined: 08 Mar 2006
Posts: 24396
Location: Langley, BC

TV/Projector: All of them!

Posted: Mon Aug 04, 2008 1:26 am    Post subject:

DWIN no longer returns phone calls. I have been able to repair every power supply that I've run into, ditto with the main motherboards. THey're not hard to figure out, if you want to send me the old SMPS to keep as a backup once I repair it for CHEAP, let me know.

I've got 4 working DWIN 700s here right now, and have a 500 on the way.
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