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mr_rye89
Joined: 23 Jun 2015
Posts: 16
Location: New Mexico
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| Posted: Tue Jun 23, 2015 7:23 am Post subject: Vidikron VPF40HD/Electrohome ECP 3501 low voltage issue? |
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Hello All, First post here,
Today I went to power on my projector, turned it on, no video and shuts off after a minute. I looked at the back, all the low voltage lights lit up but the red Horizontal scan failure light was lit up. So I consulted my service manual and it said to check the +/-12v rails. The +12v rail reads 12 volts but the -12v rail reads about 8 volts. Is this enough to keep it from showing video? If so does that mean my LVPS is shot?
I did take the LVPS out to inspect it and I don't see anything funny (burned parts, bloated caps, etc, etc)
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mr_rye89
Joined: 23 Jun 2015
Posts: 16
Location: New Mexico
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| Posted: Tue Jun 23, 2015 8:33 am Post subject: |
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Might be one of the horizontal deflection boards, Because I don't think it's getting HV but I'm not sure.......
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redfox001
Joined: 16 Mar 2009
Posts: 2257
Location: The Netherlands
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| Posted: Tue Jun 23, 2015 10:26 am Post subject: |
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I would try another power supply. Possible some of the electrolytic capacitors have lost capacity over time.
_________________
701s->runco933->8500ultra->cinemax->9500mp->919 splitpack + cinemax
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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: Tue Jun 23, 2015 1:37 pm Post subject: |
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An H fail usually is not the LVPS. It's usually one of the H cards in the back, or one of the deflection boards under the tubes. I am clearing out my ECP stock, so can sell you boards at next to nothing, including the LVPS if you want one of those.
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Tim in Phoenix
Joined: 21 Oct 2006
Posts: 4409
Location: Phoenix
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| Posted: Tue Jun 23, 2015 3:05 pm Post subject: |
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Guys
I wouldn't pour any money into a twenty year old system that had reliability issues when new; have Curt set you up in an 8500 or 9500 with plenty of parts available.
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mr_rye89
Joined: 23 Jun 2015
Posts: 16
Location: New Mexico
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| Posted: Tue Jun 23, 2015 4:26 pm Post subject: |
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Thanks for the response guys.
| Curt Palme wrote: |
An H fail usually is not the LVPS. It's usually one of the H cards in the back, or one of the deflection boards under the tubes. I am clearing out my ECP stock, so can sell you boards at next to nothing, including the LVPS if you want one of those. |
If you're clearing 'em out I'll buy a few spares.  I might also try cleaning some contacts. This unit was working perfectly a few days ago......
| Tim in Phoenix wrote: | Guys
I wouldn't pour any money into a twenty year old system that had reliability issues when new; have Curt set you up in an 8500 or 9500 with plenty of parts available. |
Someday. An ECP is a good set to learn on. It was really cheap and nobody will care if I accidentally kill it 
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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: Tue Jun 23, 2015 4:43 pm Post subject: |
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Sure, shoot me an email at curtpalme@shaw.ca.
What I'll need is the board numbers that start at 50-XXXX-XX. Those are stamped right on the boards.
Thanks!
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Tim in Phoenix
Joined: 21 Oct 2006
Posts: 4409
Location: Phoenix
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| Posted: Tue Jun 23, 2015 5:41 pm Post subject: |
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| Curt Palme wrote: | Sure, shoot me an email at curtpalme@shaw.ca.
What I'll need is the board numbers that start at 50-XXXX-XX. Those are stamped right on the boards.
Thanks! |
Replacement deflection boards must be matching identical Version and Revision numbers, if I remember correctly.
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mr_rye89
Joined: 23 Jun 2015
Posts: 16
Location: New Mexico
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| Posted: Wed Jun 24, 2015 3:22 am Post subject: |
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Email sent, fingers crossed!
Thanks again guys!
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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: Wed Jun 24, 2015 4:34 am Post subject: |
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Got it, will check tomorrow afternoon to see if I ahve them. The part numbers are good, thanks!
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mr_rye89
Joined: 23 Jun 2015
Posts: 16
Location: New Mexico
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| Posted: Sat Jun 27, 2015 9:28 pm Post subject: |
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Hmmm..... getting antsy, I'd better pull out the DLP 
In the mean time I'm painting the enclosure black, and I'll need to clean the fungus out of the blue tube. stay tuned.........
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mr_rye89
Joined: 23 Jun 2015
Posts: 16
Location: New Mexico
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| Posted: Mon Jul 06, 2015 11:45 pm Post subject: |
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Okay I got around to working on this beast today, Defungused and put new glycol in the blue tube, reinstalled it, put new horizontal deflection card in (Thanks again Curt!) and it still won't show a picture (H-scan fail light on again!) Now time to try to find a new power deflection board I guess 
*EDIT*
Might be the Vertical Deflection Horizontal Regulator board that's bad. I've been poking around with the DMM and O-scope and going through the flow chart in my service manual.
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mr_rye89
Joined: 23 Jun 2015
Posts: 16
Location: New Mexico
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| Posted: Wed Aug 05, 2015 3:02 am Post subject: |
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Just as I thought! I swapped in a new vertical deflection/horiz regulation board (Thanks again Barclay66!) and that did the trick! works good now, but I have to set the vertical hold manually for some reason......
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