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the big E
Joined: 20 Apr 2013
Posts: 1928
Location: speedwell Tn.
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| Posted: Mon Jun 17, 2013 12:29 am Post subject: Nec 10pg fan mod question |
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Ok I am going to do tinmans fan mod on my 10pg does anyone know what resistior I would need to get to slow the three fans in the chassis down some so it will be dead slient yet still be kept cool while running
I asked him if I could put different fans in the set and he advised against doing that so I am going to quiet the ones in the set down
I am going to also get the rubber fan mounts for the power supply fans to make them quieter and not slow them down
I want to enjoy the picture and not hear the set as its running so while I have to repair the video board in the set I am going to do the mod 
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CasetheCorvetteman
Joined: 09 Nov 2008
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Location: Australia
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| Posted: Mon Jun 17, 2013 2:16 am Post subject: |
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What difference it would make changing fans or slowing them down i really dont know...
Can you fit larger fans in there?
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the big E
Joined: 20 Apr 2013
Posts: 1928
Location: speedwell Tn.
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| Posted: Mon Jun 17, 2013 2:26 am Post subject: |
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Changing fans would require me to remove the green tube(not gonna happen)
So slowing them down a bit would make them quieter for me
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CasetheCorvetteman
Joined: 09 Nov 2008
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Location: Australia
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| Posted: Mon Jun 17, 2013 2:36 am Post subject: |
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You wanted to replace it a couple days ago!!
Slowing them is a bad idea in my opinion...
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the big E
Joined: 20 Apr 2013
Posts: 1928
Location: speedwell Tn.
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| Posted: Mon Jun 17, 2013 2:38 am Post subject: |
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| CasetheCorvetteman wrote: | You wanted to replace it a couple days ago!!
Slowing them is a bad idea in my opinion... |
Member tinman talked me out of swapping them out
him and the green tube which I am not going to even think of removing(I almost dropped the red tube I got to put in my samsung rptv(that would have been scary for sure)
I may just get some noise deadener material and line the inside of the set and leave the vent area open(not sure as it seems like a bad idea)
The set is close to quiet as is but if it could be made queiter I would love it(defentley going to do the fan mod on the power supply fans(not slowing them do just changing the screws out for rubber mounts)
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CasetheCorvetteman
Joined: 09 Nov 2008
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Location: Australia
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| Posted: Mon Jun 17, 2013 2:45 am Post subject: |
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Yeah, and im sure he knows what he is doing, but id like to know WHY he said not to swap!!
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the big E
Joined: 20 Apr 2013
Posts: 1928
Location: speedwell Tn.
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| Posted: Mon Jun 17, 2013 2:51 am Post subject: |
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| CasetheCorvetteman wrote: | | Yeah, and im sure he knows what he is doing, but id like to know WHY he said not to swap!! |
No clue why he said not swap
But he did say they were high quality fans(I am finding that kinda hard to believe since I work on computers a lot and slience is golden for a lot of people who ask me to bulid them a pc)so good fans are a mainstay in all builds I do
But I am not sure if I will swap them out since I found out two of them is just below the green tube(and I don't know how to remove the front cover(I have a service manual for my electrohome Ecp but not for my nec)
I ave to get the either the video output board fixed or the gain board(not sure which is the culprit)but I get no video and no convergence grids(the menus work fine)
Also when I plug a source in the video in on the front(not rgb) the lettering on screen gets jumpy(doesn't do that on rgb and I know its not the yoke connections)
Tinman also suggested replacing a regulator on the video output board but haven't seen the one he mentioned(and I can read the lettering on the chips without a magnifiing glass
I may just send the board to curt and have him refurb the board for me so I don't screw it up
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Tinman
Joined: 09 Mar 2006
Posts: 1326
Location: Carson City Nevada
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| Posted: Mon Jun 17, 2013 3:41 am Post subject: |
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A normal computer fan generally does not work on the NEC because of the tach line. IIRC, the fan pulls the line high or low only, it does not pulse like a computer fan. Besides, these fans are ball bearing, at least mine were. Slowing them down works fine in the PG10 as it is very large physically and overcooled to run in 100 degree environments. Slowing the fans (reasonably) will be perfectly fine in the average home theater. The Power supply fans are NOT rubber mounted, so the high pitch whine conducts through the entire chassis. I found that just rubber mounting them was more than enough.
With the PG10 running at 1080i and properly set up, it should run barely warm. Only a bad setup will run it hot, which tells you that you are stressing it. On mine, even the deflection heatsink was just warm. This all relies on everything running as close to neutral settings at the desired resolution. I still recommend 1080i, though. It'll just cruise along forever like that with very quiet fans.
Marc
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the big E
Joined: 20 Apr 2013
Posts: 1928
Location: speedwell Tn.
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| Posted: Mon Jun 17, 2013 3:50 am Post subject: |
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| Tinman wrote: | A normal computer fan generally does not work on the NEC because of the tach line. IIRC, the fan pulls the line high or low only, it does not pulse like a computer fan. Besides, these fans are ball bearing, at least mine were. Slowing them down works fine in the PG10 as it is very large physically and overcooled to run in 100 degree environments. Slowing the fans (reasonably) will be perfectly fine in the average home theater. The Power supply fans are NOT rubber mounted, so the high pitch whine conducts through the entire chassis. I found that just rubber mounting them was more than enough.
With the PG10 running at 1080i and properly set up, it should run barely warm. Only a bad setup will run it hot, which tells you that you are stressing it. On mine, even the deflection heatsink was just warm. This all relies on everything running as close to neutral settings at the desired resolution. I still recommend 1080i, though. It'll just cruise along forever like that with very quiet fans.
Marc |
I have seen computer fans with the tech speed wire but I still ain't swapping them out due to not wanting to remove the green tube(I am afraid I will drop it due to its weight)
Also did you ever try 1080p(I have tried it on my electrohome Ecp but it looked soft due to the small tubes)I think it would look sharp on the pg with the 9inch tubes
But I have zeroed the settings for now till I can get to set it properly
How do I change from 4:3 to 16:9(all I do on my Ecp is adjust the vertical size down to display 16:9 no clue on the nec)the nec has more picture adjustments then I am used to
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CasetheCorvetteman
Joined: 09 Nov 2008
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Location: Australia
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| Posted: Mon Jun 17, 2013 7:29 am Post subject: |
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Adjust the amplitude setting in the alignment menu. Setting up an NEC is dead easy when you know what the adjustments all do.
| Tinman wrote: | A normal computer fan generally does not work on the NEC because of the tach line. IIRC, the fan pulls the line high or low only, it does not pulse like a computer fan. Besides, these fans are ball bearing, at least mine were. Slowing them down works fine in the PG10 as it is very large physically and overcooled to run in 100 degree environments. Slowing the fans (reasonably) will be perfectly fine in the average home theater. The Power supply fans are NOT rubber mounted, so the high pitch whine conducts through the entire chassis. I found that just rubber mounting them was more than enough.
With the PG10 running at 1080i and properly set up, it should run barely warm. Only a bad setup will run it hot, which tells you that you are stressing it. On mine, even the deflection heatsink was just warm. This all relies on everything running as close to neutral settings at the desired resolution. I still recommend 1080i, though. It'll just cruise along forever like that with very quiet fans.
Marc |
Now i see why youre saying not to change them 
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the big E
Joined: 20 Apr 2013
Posts: 1928
Location: speedwell Tn.
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| Posted: Mon Jun 17, 2013 3:42 pm Post subject: |
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| CasetheCorvetteman wrote: | Adjust the amplitude setting in the alignment menu. Setting up an NEC is dead easy when you know what the adjustments all do.
| Tinman wrote: | A normal computer fan generally does not work on the NEC because of the tach line. IIRC, the fan pulls the line high or low only, it does not pulse like a computer fan. Besides, these fans are ball bearing, at least mine were. Slowing them down works fine in the PG10 as it is very large physically and overcooled to run in 100 degree environments. Slowing the fans (reasonably) will be perfectly fine in the average home theater. The Power supply fans are NOT rubber mounted, so the high pitch whine conducts through the entire chassis. I found that just rubber mounting them was more than enough.
With the PG10 running at 1080i and properly set up, it should run barely warm. Only a bad setup will run it hot, which tells you that you are stressing it. On mine, even the deflection heatsink was just warm. This all relies on everything running as close to neutral settings at the desired resolution. I still recommend 1080i, though. It'll just cruise along forever like that with very quiet fans.
Marc |
Now i see why youre saying not to change them |
I wondered what the button did thanks case
I have zeroed the settings on the set till I get to set it up for use(after I get the video output board repaired
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CasetheCorvetteman
Joined: 09 Nov 2008
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| Posted: Tue Jun 18, 2013 12:25 am Post subject: |
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Dont zero every thing, set the blanking to 100. Dont touch the KELVIN.
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Tinman
Joined: 09 Mar 2006
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Location: Carson City Nevada
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| Posted: Tue Jun 18, 2013 12:29 am Post subject: |
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| CasetheCorvetteman wrote: | | Dont zero every thing, set the blanking to 100. Dont touch the KELVIN. |
Correct. Blanking at 100 on everything, leave Kelvin.
I usually adjust kelvin as the last tweak with a color analyzer, leaving the green tube set at 50/50 and only adjusting red and blue. This only works, of course, if the video board is properly aligned.
I should say I USED to do this, as I am officially out of the CRT market.
Marc
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the big E
Joined: 20 Apr 2013
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| Posted: Tue Jun 18, 2013 12:34 am Post subject: |
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Ok I set the blanking to 100 but I haven't touched the kelvin setting as I know it would mess with the picture quality
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the big E
Joined: 20 Apr 2013
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| Posted: Tue Jun 18, 2013 12:37 am Post subject: |
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| Tinman wrote: | | CasetheCorvetteman wrote: | | Dont zero every thing, set the blanking to 100. Dont touch the KELVIN. |
Correct. Blanking at 100 on everything, leave Kelvin.
I usually adjust kelvin as the last tweak with a color analyzer, leaving the green tube set at 50/50 and only adjusting red and blue. This only works, of course, if the video board is properly aligned.
I should say I USED to do this, as I am officially out of the CRT market.
Marc |
I noticed the g2 knobs have a mark on them and they are aligned with the marks and I haven't messed with those
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Tinman
Joined: 09 Mar 2006
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Location: Carson City Nevada
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| Posted: Tue Jun 18, 2013 1:07 am Post subject: |
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| the big E wrote: | | Tinman wrote: | | CasetheCorvetteman wrote: | | Dont zero every thing, set the blanking to 100. Dont touch the KELVIN. |
Correct. Blanking at 100 on everything, leave Kelvin.
I usually adjust kelvin as the last tweak with a color analyzer, leaving the green tube set at 50/50 and only adjusting red and blue. This only works, of course, if the video board is properly aligned.
I should say I USED to do this, as I am officially out of the CRT market.
Marc |
I noticed the g2 knobs have a mark on them and they are aligned with the marks and I haven't messed with those |
And you best NOT! All hell will break loose.
That's an adjustment only made in test mode, with a scope.
However, they usually do not have a mark on them.... suggesting someone's been in there. They are usually all set essentially to the same setting. If one is off, someone probably screwed with it.
Well, once you get your video board fixed, you can post the kelvin settings and a pic of the g2 pots. That'll tell me if it's in normal range.
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the big E
Joined: 20 Apr 2013
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Location: speedwell Tn.
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| Posted: Tue Jun 18, 2013 1:16 am Post subject: |
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| Tinman wrote: | | the big E wrote: | | Tinman wrote: | | CasetheCorvetteman wrote: | | Dont zero every thing, set the blanking to 100. Dont touch the KELVIN. |
Correct. Blanking at 100 on everything, leave Kelvin.
I usually adjust kelvin as the last tweak with a color analyzer, leaving the green tube set at 50/50 and only adjusting red and blue. This only works, of course, if the video board is properly aligned.
I should say I USED to do this, as I am officially out of the CRT market.
Marc |
I noticed the g2 knobs have a mark on them and they are aligned with the marks and I haven't messed with those |
And you best NOT! All hell will break loose.
That's an adjustment only made in test mode, with a scope. |
Since I don't have a scope I have no need to adjust them(the tubes go black when the image is total black so its good)
But I don't have a service manual for the nec like I do for my elctrohome Ecp (which shows me how to properly adjust the g2 levels for it to achieve the proper color balance)
I know the knobs on the video output board I defentley am not going to touch so I don't have to get a pro to reset the color balance on the nec
Though I am going to see what curt says as I sent him pics of how the set did before the picture and grids went black(yet the menus still show)
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Tinman
Joined: 09 Mar 2006
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| Posted: Tue Jun 18, 2013 2:57 am Post subject: |
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Ummmm..... if the menus still showed, the problem is usually elsewhere. When the video board goes you get NO display at all. No menus either. Are you certain you did not accidentally mute the 3 colors?
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the big E
Joined: 20 Apr 2013
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| Posted: Tue Jun 18, 2013 3:06 am Post subject: |
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| Tinman wrote: | | Ummmm..... if the menus still showed, the problem is usually elsewhere. When the video board goes you get NO display at all. No menus either. Are you certain you did not accidentally mute the 3 colors? |
Positive I didn't mute the colors as I was watching the set as it lost color on the red and blue tubes till the video faded to black(slowly faded to black as it was over a half hour from the time it was full rich picture to nothing but a green picture then nothing but the menus showed)
I even let the projector sit for awhile unplugged and no fix so something has broke for sure   which was not cool as it took me and my dad to move the heavy beast around(not fun I wi tell you that) I have been looking over the video boards but haven't seen anything but then again I don't know what to look for that would cause this
Curt said it might be the system board but wouldn't the projector do other crazy stuff if it was? 
Its odd how it worked fine for two whole days then do this
It teased me 
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CasetheCorvetteman
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| Posted: Tue Jun 18, 2013 5:44 am Post subject: |
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If someone molests those G2 pots youll be lucky to get good black detail, depending on what they did.
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