CurtPalme.com Home Theater Forum

**AnalogRocks** · Posted: Thu Dec 07, 2006 5:47 am Post subject: HELP 4000G

Ok so it's running. Not 100% yet but I'll keep at it.

The picture is dark. I can't get a happy medium between brightness and contrast. Should I play with the G2's? Which ones are the G2 pots? Are there precautions I should take ( eg turn the pots back and forth with it off just to make sure they are not dirty)?

I tried pumping the output of the HTPC up to gama 2.7 and adjusting the brighness and contrast on the projector and I almost had a watchable level.

Little help please. Razz

EDIT: Ok found the G2 pot. It's the one I thought it was. The little red one on top of the neck board.
As pictured here:http://curtpalme.com/Ampro1500_Layout9.shtm

I'll follow these instructions but is there some other adjustment I should look for to make the gama right? END EDIT:

stefuel · Posted: Thu Dec 07, 2006 7:53 pm Post subject:

I do not think there is a "gama" adjustment on the 2000/4000 models. Do follow the G2 instructions first. then fine tune with your source.

Z-Photo · Posted: Thu Dec 07, 2006 7:58 pm Post subject:

Turn it off and smash it re-petely with a 10lb sledge.
Works ever time - inky inky blacks.

Also step7 of Ampro annomious.

Person99 · Joined: 09 Mar 2006 Posts: 4901 Location: Flower Mound, TX

Z-Photo · Posted: Thu Dec 07, 2006 8:38 pm Post subject:

I am rather proud of the RE-PETE ly

Chuck27 · Posted: Thu Dec 07, 2006 9:50 pm Post subject:

AR, check with Papalek on that one. I can't find the post but he did tell me some time ago that you can adjust sub-brightness and sub-contrast in each sector instead. The codes are not listed in the manual but I wrote them down...in my manual at home and here I am at work.

Chuck

Chuck27 · Posted: Thu Dec 07, 2006 10:03 pm Post subject:

I found it.....

http://www.curtpalme.com/forum/viewtopic.php?p=19206&highlight=#19206

Shocked

**AnalogRocks** · Posted: Thu Dec 07, 2006 11:07 pm Post subject:

**AnalogRocks** · Posted: Thu Dec 07, 2006 11:22 pm Post subject:

**AnalogRocks** · Posted: Thu Dec 07, 2006 11:24 pm Post subject:

Ok here's what I have tried. As per Curt's instructions.

I maxed out the pots by the BNC connectors to make the color even.

I adjusted the sub brightness on the RGB input card for red, green and blue. I tweaked the sub contrast ( didn't notice any difference so I put that one back )

Now I'm going to play with the G2 adjustments.

I'll let you know how it goes.

EDIT: Spelling as usual

papalek · Joined: 08 Mar 2006 Posts: 1537 Location: Longs SC

I am not sure if the 4000 series has the sub contrast and sub brights in the menu. If it does it is code 94 and 95. The pots on the RGB board are for the individual colors drive. That would be very similar to the sub bright for pure white on a white screen.
All of the contrast and brightness settings should be at 50 before doing the G2 adjustment. Use codes 65,66,67 to turn the tubes off and turn the G2 till you can just make out the raster, and remember that the green takes a little longer to go dark because it is driven harder.

**AnalogRocks** · Posted: Fri Dec 08, 2006 5:42 am Post subject:

papalek · Joined: 08 Mar 2006 Posts: 1537 Location: Longs SC

The fans are too SMALL. The 4300 and 4600 use larger fans and do not have anywheres near the heat problems as the 4000 and 4200. If you have the room to remove the fans and put spacers and the larger fans, that would help out a lot.

Chuck27 · Posted: Fri Dec 08, 2006 12:48 pm Post subject:

AR, there's a guy in Denmark called Flemming Fransden who goes by the nickname of dion swamp over on the A site. He has done extensive work on the cooling system of a 4000 series. His website is dion.swamp.dk but for some reason I can't get the link to work this morning.

He stripped his machine right down, put in larger fans on both the case and the LVPS. There's tons of pictures of what he did as well as the brand and P/N's for the fans. Quite informative.

I'm planning on emulating some of what he has done after the NFL season is over and I can once again work on the beast without having to worry about having it back up again by 1300 every Sunday.

Rolling Eyes

Chuck

Tom.W · Joined: 09 Mar 2006 Posts: 6637

The link to Dion Swamp is here on page one ...

http://www.4000p.dk/eviltwin/forum_posts.asp?TID=288&PN=1&TPN=1

**AnalogRocks** · Posted: Fri Dec 08, 2006 1:30 pm Post subject:

Chuck27 · Posted: Fri Dec 08, 2006 1:49 pm Post subject:

Those are honking big fans you're talking about. I bought some 100 mm diameter fans and I think I'll need to make a cone-type spacer for them because I'm reluctant to take a jigsaw to the case....but only because I'd have to take all the electronics out first and I'm way too ham-fisted to have confidence in my ability to get it back together again right.

Chuck27 · Posted: Fri Dec 08, 2006 4:52 pm Post subject:

**AnalogRocks** · Posted: Fri Dec 08, 2006 4:56 pm Post subject:

Chuck27 · Posted: Fri Dec 08, 2006 5:04 pm Post subject:

The mouse pad idea is a great one, I've been trying to think of a source for the best material to isolate the fans and you've just found it for me.....tanks!

Have you considered contact cement instead of bolts? I don't think the start-up torque of the fans would be too excessive, and that would be my major concern with not having a mechanical connection.