I need 365v to power a light board?How can i get that? - diyAudio
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Old 4th February 2005, 02:02 PM   #1
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Default I need 365v to power a light board?How can i get that?

Hello
i have a lamp that i wanted to use with my diy projector but to light up that lamp i need a power suply.
Well i asked around and one lamp PRO told me that i need 365v stailized to the light board and then the lamp will light up.
I'd like to know if will be very hard to do that.. because my knowledge in eletronic is basicly 0
Theres any transformer or something that can give me 365v stabilized and it's not danger neither big big big?

Heres is a picture of the board.
Click the image to open in full size.

here is a picture of the lamp.
Click the image to open in full size.

Let me know whats my chances of sucess powering this lamp.

design a power suply board i guess it's out of idea because i don't know nothing about it and wil probably ended been danger due to the high voltage..

Thanks for your help
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Old 4th February 2005, 03:05 PM   #2
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Why can't you use the existing PSU? Where did the assembly come from?

Those types of lamp need a high strike voltage, probably about 4KV, then as you say, about 350 VDC. Unless you get the specific supply for that lamp type then it will quickly kill lamps and may kill you.
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Old 4th February 2005, 03:10 PM   #3
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the PSU is very big and i don't know why it stoped working.. i mean.. it was from a comercial projector and the projector was working but with problems with the lcds, so i opened it to get the light. the objective and the fans, but now i can't use the PSU board.. it don't light up the lamp.. neither the fans that is only 12v...

in the board theres a sticker that says 12.5kv <-----> 12.5kv and then 25kv under.
the 365v was a man from a lamp factory that told me.

I already heard more than 3 guys refering the danger of the high voltage so i guess i'll just give up about the lamp and sell it. i don't want to die so young

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Old 4th February 2005, 03:17 PM   #4
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If you have a local TV repair guy he might be able to fix it for you. Or there may be some sort of safety interlock switch that you need to bypass, that was there to stop the PSU running with the lid off.
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Old 4th February 2005, 03:19 PM   #5
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now that you say that i remember about a little switch that i never understand what for it was.. but it was connected to other board and not the power suply board.. do you think that the power suply board only work when connected to a 2nd board and that board is the one with the safety interlock?
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Old 4th February 2005, 03:44 PM   #6
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Could be. Interlocks are usually microswitches.

Just be very careful when you play with this, ok, this kind of voltage will kill!
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Old 4th February 2005, 03:49 PM   #7
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ok
i'll try first with the fans only. this way theres no problems, right?
this is what i'll do:

I have the psu board where the lcd, lightboard, fans and all other boards on the projector used to be connected.

I have everything disconnected and now i'll connect only the fans..and the 2nd board where the switch was plugged and then put the switch on the correct position and click on the original power button.. even doing it this way theres all that danger?
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Old 4th February 2005, 04:03 PM   #8
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Just make sure the output leads for the lamp are suitably covered as well, the HV strike could arc anywhere.
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