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Revox
Joined: 13 Feb 2008
Posts: 158
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| Posted: Tue Sep 29, 2009 8:19 am Post subject: |
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I tried to resoldier it again yesterday evening!
I heated the complete Chip on my Gas Burner (put a little bit of whater on it to gues the temperature) and soldier a few pins and did the procedure again. The solderings are still a little bit "cold" but the PJ runs finer than before!
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Elaine Benes
Joined: 25 Apr 2006
Posts: 1416
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Revox
Joined: 13 Feb 2008
Posts: 158
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| Posted: Wed Sep 30, 2009 6:48 am Post subject: |
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Do you have an idea how to test the new STK? Now i can compare with the stock STK. When the convergence is stable it might be ok?
What STK is more important, the STK in the Focus board or in the convergence board? I've got the idea to change.
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Elaine Benes
Joined: 25 Apr 2006
Posts: 1416
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| Posted: Thu Oct 01, 2009 1:17 am Post subject: |
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The convergence one is the one with a history of failure, personally, I can't recall a focus one failing...
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Revox
Joined: 13 Feb 2008
Posts: 158
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| Posted: Thu Oct 01, 2009 8:13 am Post subject: |
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Sorry mabe i'd chosen the wrong word's in my Question:
I think i will get a "fake" STK, at lest some chip with less performance than the original chips from the 90s.
There are 4 STK chips in the PJ, and i think not all are generating waveforms with the same degree of "stress" for the STK.
So i'd like swap the STK which is bored to the convergence Board and the "fake" STK to the "boring" position.
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Revox
Joined: 13 Feb 2008
Posts: 158
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| Posted: Mon Oct 05, 2009 10:17 am Post subject: |
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I've installed 2 additional Fans on the NEC:
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blue_z
Joined: 27 Apr 2006
Posts: 63
Location: So Calif
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| Posted: Mon Oct 05, 2009 11:23 pm Post subject: |
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| Revox wrote: | | I've installed 2 additional Fans on the NEC: |
Hi there
In that second photo, the output of both fans are aimed at the same airspace. That will raise the static pressure that each fan "sees", and reduce the airflow produced by each fan.
Re-aiming that Accelero fan 180 degress from its current position or toward the nearest PJ side would be better.
Regards
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Revox
Joined: 13 Feb 2008
Posts: 158
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| Posted: Tue Oct 06, 2009 8:00 am Post subject: |
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I know, the problem was the orientation of the screws. Because the STK's are just above the heatsink.
I think it's enought to run the AC Fan @ 6V so the static pressure after the heatsink is very low.
It was hard to manage a good contact between the Fan and the bottom plate.
Next step is that i install another two Fans on the top Powersuply. It seems not very professional i know.
Yesterday i noticed a mask on the tubes ;-( I hope it is not visible to much.
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Elaine Benes
Joined: 25 Apr 2006
Posts: 1416
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| Posted: Thu Oct 08, 2009 12:01 pm Post subject: |
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If you pull that power supply out you'll find factory cut holes designed to hold fans for it in the back panel. I don't know why NEC chose to leave the fans out...
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benareeno
Joined: 22 Mar 2006
Posts: 1614
Location: ottawa, canada
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| Posted: Mon Nov 02, 2009 5:50 pm Post subject: |
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Revox,
How did this turn out for you?? Are you still running an NEC and if so, is it quiet and reliable?
Ben
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PaulB
Joined: 26 Oct 2007
Posts: 359
Location: Bonnie (but rainy) Scotland
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Revox
Joined: 13 Feb 2008
Posts: 158
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| Posted: Mon Nov 02, 2009 6:58 pm Post subject: |
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The PJ works very fine but i keep my 8500 and have sold the Nec.
All in all the noise Mod has cost me 35€ with a lot of work.
The Fan in the Front of the PJ might be "toy" mabe it helps keeping the optics at a constant Temperature.
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draganm
Joined: 08 Mar 2006
Posts: 8990
Location: Colorado
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Revox
Joined: 13 Feb 2008
Posts: 158
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| Posted: Mon Nov 02, 2009 7:41 pm Post subject: |
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Oh no, its like searching the failure of your electric cooker at the gas pipe ;-P
I had some problems with HV-flashovers since i got the PJ. And now i mannaged it with isolating the anode caps again.
So there is no coincidence at all, neither a interference!
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