CurtPalme.com Home Theater Forum

[HK-Steve]

That is the way it is suppose to be,
the pins are completely seperate top and bottom.


So nothing to worry about.


Glad the issues have been sorted out.


Cheers
Steve

[ronaldus]

Good to hear. I can now close up the unit again

Thanks again for all your help.

Whats left is mechanical setup and grayscale and then I'm done.

Regards,

Ron.

[ronaldus]

Hi Me again,

This morning I switched on the projector again (was unplugged all night) and it fired up without the need for tapping here and there. But the focus problem was there again. I switched the thing off with the remote (keeping it plugged in) and when i switched it back on again a few minutes later the focus was good and behaving normal. Bad contacts normally don't go away if you power cycle things so i guess its a board thats unstable. Would a bad focus or astig board be the cause of this? I have not yet updated those boards with new caps or chips.

I have put ferrite cores on the astig leads though.

This is a strange one.

Any suggestions?

Regards,

Ron.

[macgyver655]

[dvh99]

have you cleaned the connectors from the lvps with alcohol and did you clean the p14 pin and measure 6,3 volts?

there is a cap in the lvps that might need to be replaced (1000uf) with a 2200 uf as in nashous thread.

don`t know if this will solve your problems but i`m guessing here too of course.

quote from the thread from nashou (no pics anymore)

The cap that is used in the heater voltage circuit is a 1000uf 10 volt. Jeahong lee says its too
small for three big heaters in the tubes so he up'd them to 2200uf 25 volt caps, I used the FM
series.

[ronaldus]

Hi again,

P14 voltage was check long time ago and the regulation circuit has been modified with two resistors instead of a pot.

I used contact cleaner and a cloth to clean the contacts. The female connector was harder to get to because it's deep inside the projector.

i spayed them and then used a screwdriver covered with cloth to wipe the contacts (maybe not good enough).

I never had problems before ceiling mounting the projector. Now off course the LVPS is upside down and the pressure is different on the connector.

It could not be the focus board? If it comes from the LVPS the contrast and V and H board should be influenced as well no?

Regards,

Ron.

[dvh99]

how do the voltages measure over a 5 minute time span?

solder wires to the points on the focus board where the voltages enter (5-15-25) and see if they stay the same.

also make sure that a screw from the side that hold the side panels do not touch the lvps chassis.

best to check with a flash light to see if a screw is sticking to far inside.

[ronaldus]

Hi Everybody,

I didn't have time to check the voltages yet but I discovered the following:

My setup is: freebox (internet set-top box with blue-ray player) => Moome v3 external Full HD => marquee

Method 1:
If I switch on the projector before switching on the freebox but the moome powered up focus problem is there. The projector gives some warning no sync or something. When I then switch on the freebox the images stays unsharp.


Method 2.
If I switch on the freebox first (with the moome already powered) then the projector comes up sharp.


When I executed method 1 I can recover from this by keeping the projector in standby for a few minutes and then doing method 2. The image is then sharp and everything is fine.

For the moment I keep it like that but it still is strange.

regards,

Ron.

[Tim in Phoenix]

Hello

Are you using ASR? If so, the clm may be grabbing the wrong memory or interpolating with improper focus value.

What year was this machine built? What main firmware version?

Put up picture of the dots pattern with the focus problem.


.

[ronaldus]

Hi Tim,

I'm not using ASR. What is strange is that when i ramp the contrast up and down the focus flips from good to bad and in different areas of the image. That should not happen if the clm picks up a wrong focus value.

I'll try to make a small film of it tonight.

Thanks ron.

[Tim in Phoenix]

Hello


What year was this machine built? What main firmware version?

Put up picture of the dots pattern with the focus problem.


.

[draganm]

[ronaldus]

Hi everybody,

I have no color correction module in.

I tried to reproduce the phenomena but off course now everything is fine. I took a few screen shots but you'll get them later because i'm back at work for a moment. I still have the side of the image out of focus but i guess that's the scheimpflug adjustment.

regards,

Ron.

[ronaldus]

Hi Again,

I tried several times but impossible to reproduce the fault.

Anyway I've attached screenshots of the status and my settings.

The projector is from december 1995 and has about 1200 hours on the tubes

That's it for the moment

Regards,

Ron.

[Tim in Phoenix]

Hello

The blurred grid suggests a stig snap problem; try replacing CLM R35 with 3K3 per http://www.curtpalme.com/docs/ElectrohomeMarqueeTechnicalBulletin_TB97-04.pdf


Cheers

Tim

[thewolfman]

Hi..

Did you change the R35 and green was fine after that? My pj also have green going soft and basically once every night lately. I solve it by turning it off and on again and then it works. Not a huge problem but annoying. I'm thinking of asking some electronics guy how much they would charge me for replacing that and some other things for me, if it solves anything that is. 1 hour labor maybe if I told them exactly what to do with your advice.

[ronaldus]

Hi Tim and wolfman,
This resistor R35 was already changed by me long time ago. And the symptoms were a little bit different. If the focus on green was off then I had to go into the menu: RGB focus then select green and then when I changed the setting with one push on the arrow buttons it snapped back in focus. The resistor change solved this issue.

The last two pictures (right edge focus) and (center focus) have nothing to do with the focus problem that I had when ramping the contrast up and down. This problem never came back and the projector switches on all the time and center focus is as shown in the center focus screenschot. However I still have a problem with the focus on the edges of the image and that you see in the right edge focus screenshot. It's taken on the right edge of the horizontal center line. I tried some scheimpflug adjustment but don't really manage to get rid of it.

When I had my projector on a table perpendicular to the screen I could get all the edges sharp.

I've exchanged the glycol in the green and blue tubes with a mixture of 25% Glycerine and 75% propylene glycol as mentioned in this forum and i thought that that's the reason but the red tube has the original techspray fluid and it has the same problem.


Wolfman I can change the resistor for you but i guess it would cost a fortune on shipping cost to send it to europe

regards,

Ron.

[Nashou66]

Ron take a pic of the dot pattern only if you can. Does the focus still snap into focus when adjusting contrast? And does it do this on all colors or just green?

Nashou

[thewolfman]

Ok, good thing you got rid of it. When my green goes out of focus, it looks exactly the same all over with really thick grids, not like yours but figure it might be the same problem anyway. I probably could solder it myself, but what I really meant was some electronics store in town to do it. Fast and easy, but honestly I’ll probably lose my 30W soldering pen and buy a soldering station and do it myself. I will buy the caps off ebay.co.uk as I just looked it up. I also bought an IC puller the other day from there and await some more money to buy the rest of the stuff needed to clean the CLM, which might clear up some other glitches now and then.
But did redo everything, inc. geometry and scheimpflug, and that solved the overall focus problem I had before at the ends. Now it looks universal across and a set off HD10f is no longer top of priority.

Btw, I to have my pj on a table perpendicular to the screen, and maybe that helped me a little getting my edges finally sharp as well. The table isn’t high enough so the angle is off by some few degrees only, but good thing you told me about that. I’m planning on having it up in chains, that I bought last month, and raise it without turning it over, to correct and get an almost 90 degree angle, and doing so I can slide a 3 seat sofa just under it. The seat at the end will be taken up by the pj hovering above it. But can’t do it now because the table is in way..

[ronaldus]

Hi Nashou,

No, focus is good all the time (in the center) and I can ramp the contrast up and down without any problems. Also projector switches on all the time without any problems.

regards,

Ron.