CurtPalme.com Home Theater Forum

RogueChili · Joined: 31 Mar 2008 Posts: 162 Location: Westfield, MA

A small price to pay for 10,000 lumen output! Looking back I should have snagged one of those from the R&D department.

VideoGrabber · Joined: 09 Apr 2006 Posts: 933 Location: Michigan

~6 weeks ago, azzkicker wrote:
> in a few days i have the kit

then i bring the mod on my neckboards, and hope ich dont see the f*cking streaking <

Any reports on progress in that area? Or are there problems there as well? Thanks.

RogueChili · Joined: 31 Mar 2008 Posts: 162 Location: Westfield, MA

The second set of boards shipped last week. Because of the reported problem I felt it necessary to burn in the boards for a long period of time in my machine before shipping them. The boards preformed as expected in my machine and no failures after 40 hours of burn in time.

Installation of the second set of boards should start this week. It will take some time being the first field installed kit. The installation instructions have not been verified and are sure to need editing.

speedyandre · Joined: 18 Dec 2006 Posts: 291 Location: Netherlands

I think that I have some troubles with blue here Sad

After swapping the blue neck board and placing the fans blue was gone.
With my own blue neck board blue is very dim, I can't get it as bright as the other colours.
Earlier I had a bad blue tube but I can't imagine that it gets this bad in one day ....
When the ABL jumper is removed green stops working, even when the extra cooling fans are in place.
I hope I can find out why blue fails, I don't have equipment for measuring HV.

André

Mark_A_W · Posted: Mon Oct 12, 2009 10:56 pm Post subject:

If one tube is working, you don't have a HV problem. HV is all or nothing.

RogueChili · Joined: 31 Mar 2008 Posts: 162 Location: Westfield, MA

I agree with Mark, the HV is not the problem.

During development I noticed a few things that can cause problems.

First, verify the neck board is pushed securely on the tube neck and seated properly.

Second, remove the flat ribbon type cable from the CA board and re-insert it straight and centered into the connector. Compare the position with the other connectors, it should look straight and be seated at a similar depth.

Another point, when you enable or disable the ABL you must reset the bias levels accordingly.

Just to be clear, when you enable the ABL you must put the jumper back to the original location; it must be installed on one of the two boards.

speedyandre · Joined: 18 Dec 2006 Posts: 291 Location: Netherlands

The HV is not the problem, when I disconnected the blue wire from the neck board I got a lot of light output (I put the 1292 off immediately after that).
Replacing the ribbon cable with a better one didn't help.
The video coax connector doesn't fit very well, it gets loose easily.
With or without ABL, both connected properly makes no difference.
It seems that the video signal is muted or there is almost no gain in it.
When I pump up the blue video signal with my scaler I can see a faint picture with the standard neck board, so at least some thing comes trough.
This can be a cable problem, but wich one is it?
Connecting the green video coax to the blue neck board also gives a faint pictue on blue.

André

RogueChili · Joined: 31 Mar 2008 Posts: 162 Location: Westfield, MA

What board is the ABL jumper installed on ?

Enter the service mode; record the values for RGB bias and RGB gain parameters and post the values.

speedyandre · Joined: 18 Dec 2006 Posts: 291 Location: Netherlands

When it worked well with the red and green modded neck boards and having disabled ABL I had these values:

Bias
R 193
G 238
B 219
(my own settings).

Gain
R 100
G 165
B 200

Blue is a bit lower because the tube has been replaced with a 'new' one (800h).
The other tubes have about 3000h.

The problem with blue persists with the jumper on either board.

André

RogueChili · Joined: 31 Mar 2008 Posts: 162 Location: Westfield, MA

OK, those values look good.

Sorry to be redundant, I just want to be sure I understand correctly.
What board is the ABL jumper currently on?
Are the Red and Green tubes working properly?

Verify the pins on the crt are not bent or broken.

The CAB and CBB boards are connected electrically via two headers. It is possible the connection was disrupted by the removal of the wire located between the boards during the swap. Verify they are connected properly.

The black wire that connects to the CAB board on the top left, that is the video input signal, make sure it is completely engaged.

speedyandre · Joined: 18 Dec 2006 Posts: 291 Location: Netherlands

I think the black cable (video) could be a problem here, it doesn't fit well on both blue neckboards and it gets loose easily.
Maybe the central pin is misaligned or not exactly round anymore ....
That would at least explain the weak video signal.

André

RogueChili · Joined: 31 Mar 2008 Posts: 162 Location: Westfield, MA

Send Curt an email and see if you can get a replacement cable.

I will investigate the possibility of repairing it.

speedyandre · Joined: 18 Dec 2006 Posts: 291 Location: Netherlands

I got the video cable fit a bit better, it's more like the neck board where the 'loose' grip comes from.
When showing a test pattern blue is visible and steady but faint with contrast and brightness set to maximum.
As before also the green video cable on the blue neck board shows the same faint picture.
The blue cable on the green neckboard shows a normal picture so the video channel and the cable seem ok.
I suppose something is wrong with the blue neckboard, it came after swapping it with the modded one.
Maybe one of the pcb's connected to the neckboard is bad, can I exchange it with green or are they different?

André

[edit] The modded blue neck board now works at least with a video cable that fits better.
Blue is still very dim but comparable with the normal neck board.
I'll let it play for some hours to see if the blue modded neck board doesn't get muted when ABL is switched off Wink

b52_freakshow · Joined: 13 Oct 2009 Posts: 1

I am certainly in line to buy this mod...the streaking was driving me nuts. On a side note, can you point me to a thread about a jittery picture? My picture bounces like someone is shaking the projector, even though it is mounted rock solid.

speedyandre · Joined: 18 Dec 2006 Posts: 291 Location: Netherlands

I've checked the service manual, the EBB board is connected to the neck board, it has some power lines going to the neck board, maybe one of them failed ....
I can place a spare EBB board if that makes sense ....

André

RogueChili · Joined: 31 Mar 2008 Posts: 162 Location: Westfield, MA

Andre, remove the neck board assembly and give all the connections on the CAB and CBB boards a careful methodical inspection. Then carefully inspect all the cables that attach to the neck board assembly- both ends. Look for bad crimp on contacts, damaged or cut wire, bent male contacts or female contacts pulled out from the connector housings. This has to be something simple.