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acrawley
Joined: 20 Jun 2006
Posts: 18
Location: Redmond, WA
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| Posted: Mon Oct 27, 2008 1:55 am Post subject: Dead PSU in Runco DTV-933 (NEC 6PG Xtra) |
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I got this projector from a guy at work who was remodeling his home theater. He told me there was nothing wrong with it other than some calibration issues, so I brought it home and plugged it in. I think (although I wouldn't swear) that I heard a relay click, but there were absolutely no signs of life other than that, so I unplugged it and set it aside for a month or three.
I had some free time this weekend, so I pulled it back out and took apart the PSU. All the fusible resistors (R03, R04, R05) on the smaller board are toast, but the rectifier and other parts appear OK. I wasn't able to find anything fried on the larger board. Replacing the resistors is no problem, but I don't want to spend time and money just to have it immediately fail again due to a deeper issue.
Anyone aware of anything that could cause this?
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macgyver655
Joined: 22 Aug 2007
Posts: 8508
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| Posted: Mon Oct 27, 2008 2:02 am Post subject: |
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I have the service manual for your projector but its on the hard drive thats locked up in my truck outside. I have to remove all hard drives when I leave the house so they dont get smashed. I'll get it tomorrow and check it out for you. Later
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Curt Palme
CRT Tech
Joined: 08 Mar 2006
Posts: 24396
Location: Langley, BC
TV/Projector: All of them!
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| Posted: Mon Oct 27, 2008 2:07 am Post subject: |
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If not, I have spares. I'd change the resistors and power up. If it dies again, it's going to be cheaper to buy a replacement unit off me than it will be to spend time and money troubleshooting yours.
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acrawley
Joined: 20 Jun 2006
Posts: 18
Location: Redmond, WA
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| Posted: Mon Oct 27, 2008 2:11 am Post subject: |
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| Curt Palme wrote: | | If not, I have spares. I'd change the resistors and power up. If it dies again, it's going to be cheaper to buy a replacement unit off me than it will be to spend time and money troubleshooting yours. |
By "replacement unit", do you mean that board, the entire PSU, or the projector itself?
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Curt Palme
CRT Tech
Joined: 08 Mar 2006
Posts: 24396
Location: Langley, BC
TV/Projector: All of them!
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| Posted: Mon Oct 27, 2008 2:52 am Post subject: |
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The whole power supply. If it's not a simple resistor blown problem, then it can be really tricky to fix. That's why I keep a few supplies in stock, cheaper to replace than to repair. SHoot me a PM or email at curtpalme@shaw.ca if you don't get it going.
Cheers!
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