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cornelius
Joined: 19 Aug 2006
Posts: 123
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| Posted: Mon Oct 13, 2008 8:14 pm Post subject: Focus mod on ecp 4100? |
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I've got an ecp 4100. I got it with 07ms tubes, not sure if they are original, or not. Does the focus mod apply to this projector, with these tubes. I'd love to tighten up the focus a little.
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stefuel
Joined: 07 Mar 2006
Posts: 3353
Location: Green Harbor MA USA
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| Posted: Mon Oct 13, 2008 8:41 pm Post subject: Re: Focus mod on ecp 4100? |
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| cornelius wrote: | | I've got an ecp 4100. I got it with 07ms tubes, not sure if they are original, or not. Does the focus mod apply to this projector, with these tubes. I'd love to tighten up the focus a little. |
07MS tubes are not original to that projector, SD-187's are. If you can adjust the focus pots to either side of optimum electronic focus, you don't require any modification. All the ECP focus mod is, is the addition to or change of a single resistor to put the pot in range of the adjustment. Other than that if your optical focus is correct you might need to adjust the stig and flare (beam) adjustments.
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Chip
A Barco is only a AmPro with training wheels
Card carrying member of the AVS chain gang.
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cornelius
Joined: 19 Aug 2006
Posts: 123
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| Posted: Mon Oct 13, 2008 9:38 pm Post subject: |
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Thanks for the reply. I have focus on both sides of optimal, so I guess I don't need the mod. The projector is evenly focused from corner to corner fairly well. I'm just looking for a little extra focus. Are the stig & flare adjustments done through the magnets on the tube necks?
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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 13, 2008 10:34 pm Post subject: |
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Yes they are, but keep in mind that all ES focusing tubes lose focus over time. That set has either had the tubes replaced already, or it was a late version of the 4100, but if the tubes have been on but in standby mode (no light emitting with the set on) for a long time, say 3000 hours or more, the focus will be a bit soft. Tweak the astig magnets, check for test pattern dot roundness on either side of optimal focus. If that's all good, then that's as good as the focusing will get.
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stefuel
Joined: 07 Mar 2006
Posts: 3353
Location: Green Harbor MA USA
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| Posted: Mon Oct 13, 2008 10:51 pm Post subject: |
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Curt, wouldn't that have been a 4500 to come standard with 07MS tubes?
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Chip
A Barco is only a AmPro with training wheels
Card carrying member of the AVS chain gang.
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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 13, 2008 11:17 pm Post subject: |
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Nope, I've seen a few late model 1993/94 4100s in with stock 07MS tubes. I think that's about the time that Sony switched to the later tubes.
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