| Author |
Message |
Curt Palme
CRT Tech
Joined: 08 Mar 2006
Posts: 24396
Location: Langley, BC
TV/Projector: All of them!
|
| Posted: Sun Jan 29, 2012 8:59 pm Post subject: |
|
|
|
Someone told me once if that resistor is burnt, that it indicates shorted diodes in the quadrupler portion of the HVPS. So beware there could be more wrong..
|
|
| Back to top |
|
 |
macgyver655
Joined: 22 Aug 2007
Posts: 8508
|
| Posted: Sun Jan 29, 2012 9:19 pm Post subject: |
|
|
| HK-Steve wrote: | The material in the potted section just swelled a little, not softened.
Then I found the burnt resistor, gone completely, and the burnt circuit board.
more to come.
Cheers
. |
Is this one that failed in the same projector with the exploded fuse? Or was it out of something else?
|
|
| Back to top |
|
|
HK-Steve
Joined: 15 Jul 2006
Posts: 849
Location: Switzerland
TV/Projector: Marquee 9500, Epson 8100
|
| Posted: Sun Jan 29, 2012 9:25 pm Post subject: |
|
|
OK, a recap.
The burnt resistor was found in a Revision A7 HVPS,
The Revision A1 does not have the resistor.
The Revision B series has no resistor also. The exploded fuse HVPS x3.
I am about to open up another A7 to see if I can find the resistor.
Man, is my workshop a mess after doing 3 hvps's now.
Cheers
_________________
|
|
| Back to top |
|
|
macgyver655
Joined: 22 Aug 2007
Posts: 8508
|
| Posted: Sun Jan 29, 2012 9:33 pm Post subject: |
|
|
This one is a Rev: C7 and had the resistor.
What is in place of the resistor in the ones that do not have it?
|
|
| Back to top |
|
|
macgyver655
Joined: 22 Aug 2007
Posts: 8508
|
| Posted: Sun Jan 29, 2012 9:39 pm Post subject: |
|
|
I just looked at a few more prints that I have on some other model Spellman HVPS's and none of them show a resistor in that location. Just a direct connection to the first cap..
So I'm guessing that resistor is just a suppression device that was tried in a few various revisions.
|
|
| Back to top |
|
|
HK-Steve
Joined: 15 Jul 2006
Posts: 849
Location: Switzerland
TV/Projector: Marquee 9500, Epson 8100
|
| Posted: Sun Jan 29, 2012 9:44 pm Post subject: |
|
|
well, here is another problem,
just opened a Revision A7, found no resistor............ crap.
That means, no 2 HVPS's are the same.
some have the resistor, others do not.
now to clean up the mess.
Cheers
_________________
|
|
| Back to top |
|
|
HK-Steve
Joined: 15 Jul 2006
Posts: 849
Location: Switzerland
TV/Projector: Marquee 9500, Epson 8100
|
| Posted: Sun Jan 29, 2012 9:46 pm Post subject: |
|
|
isn't the C revisions a 34Kv supply??
I only have revision A and B's.
If no resistor, then a direct link from the transformer to the 6Kv capacitor.
Cheers
_________________
|
|
| Back to top |
|
|
macgyver655
Joined: 22 Aug 2007
Posts: 8508
|
| Posted: Sun Jan 29, 2012 9:49 pm Post subject: |
|
|
| HK-Steve wrote: | isn't the C revisions a 34Kv supply??
I only have revision A and B's.
If no resistor, then a direct link from the transformer to the 6Kv capacitor.
Cheers |
Yes it is.
Did you find any reminents of a resistor in the compound? Or just burnt stuff?
|
|
| Back to top |
|
|
HK-Steve
Joined: 15 Jul 2006
Posts: 849
Location: Switzerland
TV/Projector: Marquee 9500, Epson 8100
|
| Posted: Sun Jan 29, 2012 9:55 pm Post subject: |
|
|
completely burnt, nothing to even ID the remains.
drivers licence, or dna would have been great, then we would know...... ha ha
_________________
|
|
| Back to top |
|
|
macgyver655
Joined: 22 Aug 2007
Posts: 8508
|
| Posted: Sun Jan 29, 2012 9:59 pm Post subject: |
|
|
|
I'm beginning to wonder if there was actually a resistor there to begin with . I had absolutely nothing also. Maybe the wire itself just burned up and charred the potting compound. I only thought a resistor based on 1 of the prints I have. But the others showed no resistor.
|
|
| Back to top |
|
|
HK-Steve
Joined: 15 Jul 2006
Posts: 849
Location: Switzerland
TV/Projector: Marquee 9500, Epson 8100
|
| Posted: Sun Jan 29, 2012 10:07 pm Post subject: |
|
|
I can not tell, as it really is pretty much ash, which would make sense with your comment of just the potting material burning,
rather than a component burning up!!.
cheers
_________________
|
|
| Back to top |
|
|
HK-Steve
Joined: 15 Jul 2006
Posts: 849
Location: Switzerland
TV/Projector: Marquee 9500, Epson 8100
|
| Posted: Sun Jan 29, 2012 10:16 pm Post subject: |
|
|
_________________
|
|
| Back to top |
|
|
HK-Steve
Joined: 15 Jul 2006
Posts: 849
Location: Switzerland
TV/Projector: Marquee 9500, Epson 8100
|
| Posted: Sun Jan 29, 2012 10:42 pm Post subject: |
|
|
off to bed, catch you tomorrow for more mess.
cheers
_________________
|
|
| Back to top |
|
|
nidi
Joined: 17 Aug 2008
Posts: 305
Location: Switzerland
|
| Posted: Sun Apr 08, 2012 10:55 am Post subject: HPVS Fuse exploded! |
|
|
Hello guys,
any news on the HVPS problem?
projector has been out of service for the last 4 months now, just sucks when you can't watch movies when i'ts
miserable outside!
Michael
|
|
| Back to top |
|
|
|
|
