CurtPalme.com Home Theater Forum

**kal** · Posted: Tue Dec 21, 2021 5:24 pm Post subject:

What Curt meant was that it could be one or more of the boards mentioned.

If the unit was in continuously in use when the issue happened it would likely be one board as failures across multiple boards at the same time would be rare. Given that the unit sat for a long time unused (years?) there's a higher probability that it could be multiple boards as parts like electrolytic caps dry out/stop working/etc.

Kal

lolkalberer · Joined: 19 Dec 2021 Posts: 19

**Curt Palme** · Posted: Wed Dec 22, 2021 2:01 am Post subject:

I no longer have an 808 here to test boards in. I do have some boards left that worked when I put them on the shelf. Where are you located?

km987654 · Posted: Wed Dec 22, 2021 5:51 am Post subject:

Are you able to be a little more precise as to where the squealing is coming from? Barco quads and or splitters will squeal before they fail. The squealing in this case is high voltage going to ground. If it is this then locate the quadrupler which is at the back of the unit. Use this link to find that http://www.curtpalme.com/Barco808_Layout1.shtm

The splitter is between the green and blue tubes inside the set. You will see a number of large HV red cables running into that.

When its squealing see if you can determine if its coming from one or both of those.

DON'T TOUCH either of them though as they are responsible for 34KV.

lolkalberer · Joined: 19 Dec 2021 Posts: 19

lolkalberer · Joined: 19 Dec 2021 Posts: 19

**Curt Palme** · Posted: Wed Dec 22, 2021 2:56 pm Post subject:

I can, can you send me an email to curt at reeltoreeltech dot com with your address? I also need to know if it's a BD808s or a BG808s. I'll put together what parts I have left, although with a few boards, shipping likely will be $150USD or so.

Thanks!

km987654 · Posted: Thu Dec 23, 2021 12:25 am Post subject:

lolkalberer · Joined: 19 Dec 2021 Posts: 19

i checked the smp board but i don’t see anything obvious. isn’t it normal for CRT projectors to sound like a CRT television?
Photo of board: https://1drv.ms/u/s!AszjmP5e2jJigYBWXQXxUKf5rnRGMA?e=edSbTV

however, i checked the front part of the Projector and there i saw this: https://1drv.ms/u/s!AszjmP5e2jJigYBR4vfN2OgIU72T7g?e=f2v7Zg
could this be causing any problems?

km987654 · Posted: Fri Dec 24, 2021 9:43 pm Post subject:

lolkalberer · Joined: 19 Dec 2021 Posts: 19

I looked at everything again with a friend and he noticed that on the Sync+Vertical Deflection Module there are these weird wirings.
Picture: https://1drv.ms/u/s!AszjmP5e2jJigYBd4JqSbyZHyLj3Gg?e=VoEWDs
They don’t match up with the service manual, so I guess the previous owner did something here?
We will try to rewire it back to normal according to the service manual.

Another thing is on the back there’s this led which isn’t connected to anything
Picture: https://1drv.ms/u/s!AszjmP5e2jJigYBfr4EAM3RzIdPEjQ?e=KPBDv9

**Curt Palme** · Posted: Mon Dec 27, 2021 3:04 pm Post subject:

That LED is not stock, so ignore it. The big problem you have now is that the set has been modified to a point that you don't know what is going on.

If someone had brought me that 808s a few years ago when I was still doing CRT projectors, I likely would have turned it down simply due to the fact that it was modified. Since you haven't seen the projector running, you don't know if the modder caused the set to be defective, or whether the set simply failed on its own.

At this point though, I wouldn't un-mod anything, as you may end up causing more problems, making the set impossible to diagnose.

I'll check into what spare 808s boards I have today or tomorrow, and will let you know.

lolkalberer · Joined: 19 Dec 2021 Posts: 19

ok i will leave it allone. thanks for helping out!

km987654 · Posted: Wed Dec 29, 2021 3:52 am Post subject:

km987654 · Posted: Wed Dec 29, 2021 4:03 am Post subject:

If you really want this to work as well as it could I would dump that vertical deflection board anyway in favour of R7628085

Here is an image from this site

http://www.curtpalme.com/forum/viewtopic.php?t=16437

You don't need the small daughter board.

lolkalberer · Joined: 19 Dec 2021 Posts: 19

km987654 · Posted: Wed Dec 29, 2021 10:42 pm Post subject:

Boet · Joined: 10 Jan 2012 Posts: 30 Location: Netherlands

lolkalberer · Joined: 19 Dec 2021 Posts: 19

So, I finally received the replacement parts from Curt and tried it out… with the exact same results. Crying or Very sad

I replaced the H shift board, the switch mode PSU and the G2 diagnostic board. So, I guess it must be the Vertical Board or the Horizontal board, but I have no clue where to get a replacement for that. If anybody knew where I could get one of those, I’d be very thankful. But until then I’ll have to put this project on hold.