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dvh99
Joined: 25 Dec 2009
Posts: 2158
Location: nederland
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| Posted: Fri Oct 08, 2010 4:48 pm Post subject: |
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that explains those ps1 to 3.
btw those ad834s are yours mike.
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dvh99
Joined: 25 Dec 2009
Posts: 2158
Location: nederland
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| Posted: Fri Oct 08, 2010 8:29 pm Post subject: |
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i need help, scott suggested to ground near output u11 17 23, so on the schedule that is at r1000/1001/1002 but i can not find them on the vim 2035-02p, anyone who does?
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mp20748
Joined: 12 Sep 2006
Posts: 5689
Location: Maryland
TV/Projector: 9500LC Ultra / Super 02 and 03 VIM
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| Posted: Fri Oct 08, 2010 9:21 pm Post subject: |
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| dvh99 wrote: | | i need help, scott suggested to ground near output u11 17 23, so on the schedule that is at r1000/1001/1002 but i can not find them on the vim 2035-02p, anyone who does? |
Not sure what you're asking here, but if it's about where to best ground an attached board. I've attached some wire leads to the places I would recommend. Not sure if you could make them all out from the shot, but they have been the ones I've used over the years for various test and other applications:
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dvh99
Joined: 25 Dec 2009
Posts: 2158
Location: nederland
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| Posted: Fri Oct 08, 2010 10:59 pm Post subject: |
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just tested the board but i got an lvps error on the clm, i now put back another vim and the pj starts normal, any ideas?
edit: i tested with only the green connected.
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mp20748
Joined: 12 Sep 2006
Posts: 5689
Location: Maryland
TV/Projector: 9500LC Ultra / Super 02 and 03 VIM
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| Posted: Fri Oct 08, 2010 11:32 pm Post subject: |
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| dvh99 wrote: | just tested the board but i got an lvps error on the clm, i now put back another vim and the pj starts normal, any ideas?
edit: i tested with only the green connected. |
If you used the grounds that I placed the wires on in the shot, they are all good grounds for sure, so let's try and look at what could be causing a problem for you.
In that section there are both +/-14 and +/-5 volt rails. Both of those rails are either fused by the two 2 amp green fuses (5 volt) or two 4.7ohm (14 volt) SMD resistors at the edge right at the multi-pin connector. Usually when either of those rails are shorted those resistors will open. Sometimes they won't.
The best way to deal with retro mods when attaching to an existing board is to float fusible resistors right where the retro board would be getting it's +/- supply.
Th circuit you're trying to retro fit should be getting its supply from the +/-5 rails... where are you pulling that from on the board?
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dvh99
Joined: 25 Dec 2009
Posts: 2158
Location: nederland
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| Posted: Fri Oct 08, 2010 11:36 pm Post subject: |
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c25 and c84 tants.
mike the fact that i have connected green only has nothing to with it, does it?
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dvh99
Joined: 25 Dec 2009
Posts: 2158
Location: nederland
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| Posted: Fri Oct 08, 2010 11:37 pm Post subject: |
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14.5v from c8 btw
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dvh99
Joined: 25 Dec 2009
Posts: 2158
Location: nederland
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| Posted: Fri Oct 08, 2010 11:42 pm Post subject: |
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the resistors measure 10 ohms so thats allright i guess
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dvh99
Joined: 25 Dec 2009
Posts: 2158
Location: nederland
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| Posted: Fri Oct 08, 2010 11:44 pm Post subject: |
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fuses are ok too
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mp20748
Joined: 12 Sep 2006
Posts: 5689
Location: Maryland
TV/Projector: 9500LC Ultra / Super 02 and 03 VIM
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| Posted: Fri Oct 08, 2010 11:44 pm Post subject: |
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| dvh99 wrote: | c25 and c84 tants.
mike the fact that i have connected green only has nothing to with it, does it? |
Yes, C25 and 84 are good safe points for +/-5 volts - C25 your negative, C84 your positive.
And the video connection (green) don't matter at this point.
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mp20748
Joined: 12 Sep 2006
Posts: 5689
Location: Maryland
TV/Projector: 9500LC Ultra / Super 02 and 03 VIM
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| Posted: Fri Oct 08, 2010 11:47 pm Post subject: |
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| dvh99 wrote: | | the resistors measure 10 ohms so thats allright i guess |
It's really good to start with that value, but I'm not sure it's the right value for the board. It's definitely a safe value.
And based on the current that's on those 5 volts rails, your short is most likely somewhere else and not on the retro board. If it was those resistors would have cried out (smoked) to you.
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dvh99
Joined: 25 Dec 2009
Posts: 2158
Location: nederland
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| Posted: Sat Oct 09, 2010 12:24 am Post subject: |
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retro board is the addon board mike?
could it be that the addon board draws too much current so the lvps error light goes on?
i have far more capacitors then in the original design.
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Nashou66
Joined: 12 Jan 2007
Posts: 16171
Location: West Seneca NY
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dvh99
Joined: 25 Dec 2009
Posts: 2158
Location: nederland
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| Posted: Sat Oct 09, 2010 1:13 am Post subject: |
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when firing up the pj without rgbhv connected the 3rd led from the left on the lvps blinks anyone an idea?
floor mounted i double checked it really is the 3rd led blinking so that indicates -24v.
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dvh99
Joined: 25 Dec 2009
Posts: 2158
Location: nederland
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| Posted: Sat Oct 09, 2010 5:58 pm Post subject: |
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no one, scott perhaps?
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mp20748
Joined: 12 Sep 2006
Posts: 5689
Location: Maryland
TV/Projector: 9500LC Ultra / Super 02 and 03 VIM
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| Posted: Sat Oct 09, 2010 9:03 pm Post subject: |
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I'll be able to help with this, but it's going to be later or tomorrow.
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dvh99
Joined: 25 Dec 2009
Posts: 2158
Location: nederland
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| Posted: Sat Oct 09, 2010 9:41 pm Post subject: |
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i found the fault for the error light on the clm and the 3rd led from the left on the lvps, it was a short because of not long enough etching, it was hard to see but i spotted it  , now i will test and see what happens with an actual picture.
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dvh99
Joined: 25 Dec 2009
Posts: 2158
Location: nederland
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| Posted: Sat Oct 09, 2010 10:04 pm Post subject: |
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ok the pj fires up but i get no picture and i get some diagonals in the picture, the remote doesnt respond either when the pj is on.
edit i get a full "white" green field with very noticeable scanlines (not a high internal scanrate) and 5 somewhat diagonal stripes
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tse
Joined: 03 May 2006
Posts: 1014
Location: Sweatbucket, Fl.
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| Posted: Sat Oct 09, 2010 10:38 pm Post subject: |
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A foil short might have opened a fuse or one of the resistors that are used as a fuse. Check and make sure the rails are good on your VIM. Good, bad, or indifferent video shouldn't cause the projector to not sync.
Scott
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dvh99
Joined: 25 Dec 2009
Posts: 2158
Location: nederland
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| Posted: Sat Oct 09, 2010 11:48 pm Post subject: |
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scott i measured the resistors and fuses and they are ok.
i am now using 768ohm instead of 715 (forgot to order) could that be it?
nashou suggested to replace the dc restore resistor r127(green channel) to 3k3 i have used 2*6k2 (i havent got 3k3)
i still dont get a picture.
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