CurtPalme.com Home Theater Forum

dentree · Posted: Mon Jan 19, 2015 9:00 am Post subject:

I guessed that is where the error code originated, but even putting the CINE 8 convergence board back it is not seeing anything related to the convergence,or for that matter the LIMO is not present in the menu either, when I first got the machine everything appeared to be present, but no longer, and the only alterations to the machine are the neck yokes and the focus coils, as they are really mechanical in nature as opposed to this current issue.

I have successfully had boards 4,5 & 6 out and checked all the plugs and wiring and found nothing amiss in that regard

Trev

km987654 · Posted: Mon Jan 19, 2015 9:08 am Post subject:

dentree · Posted: Mon Jan 19, 2015 10:33 am Post subject:

Sorry about the confusion

just so I am clear on this, the convergence board is the one with little board on top?
The reason I ask is that because the BG 808 board does not have the Little daughterboard on it,and there are 3 multi pin plugs on it to remove, will there be the corresponding sockets on the BG 808 board?, I will of course find out soon enough when I take out the BG 808 tray.....just thought I would ask in advance.

Just as a matter of interest I take it that the board just south of the board in question (looking from the multi pin chassis connectors angle) and the one to the right of that I think is the screen edge stigmator board, yes?

I will attempt the swap and let you know the outcome

Many thanks

km987654 · Posted: Mon Jan 19, 2015 11:30 am Post subject:

dentree · Posted: Mon Jan 19, 2015 12:10 pm Post subject:

OK I have installed the Cine 8 convergence and daughterboard into the BG 808 tray and it appears to function I have tried all the functions which did not work and all seems fine including dynamic astig AND THE SEAGULL ADJUSTMENTS INCLUDING THE left SIDE

I have put the BG 808 convergence board into the Cine 8 tray and there is NO convergence functions (exact replication of the original issue on the Cine 8 tray ) so I suppose it in all probability the driver board,

I did NOT test the dynamic astig functions on the Cine8, had not got that far into it, but I shall swap the driver board and see what happens, then if that is NG that leaves the dynamic ASTIG board....but please correct me if I have gone off track with my logic, all assistance and comments most welcome,

km987654 · Posted: Mon Jan 19, 2015 8:50 pm Post subject:

dentree · Posted: Mon Jan 19, 2015 10:37 pm Post subject:

At present as long as one ok, that will do for now, I need to source A Quad for the other one, as that was the first thing that failed In the Cine 8, so along with the swapping of the convergence board I will need to resolve those two issues to have them both working, but I will swap the other devices on the tray to determine which is the faulty one, and then go on from there, unless you can think of anything else I should address,
Meanwhile I thank you for your help and support, very much appreciated.

Trevor

km987654 · Posted: Tue Jan 20, 2015 5:29 am Post subject:

dentree · Posted: Tue Jan 20, 2015 7:10 am Post subject:

I understand, that's a good thought, will there likely be anything visible to look at or are these things diagnosed in some other fashion

CasetheCorvetteman · Joined: 09 Nov 2008 Posts: 6326 Location: Australia

If a resistor is burned you may be able to see it, but sometimes its not so simple.

km987654 · Posted: Tue Jan 20, 2015 8:52 am Post subject:

km987654 · Posted: Tue Jan 20, 2015 10:35 am Post subject:

Here is a link to a thread about the very issue. There are two resistors side by side labeled SR1 and SR2. You will find them at the back of the convergence output board next to two large caps near the connector. Either one could be blown or both I suppose. These are designed to self destruct to prevent further damage.

http://www.curtpalme.com/forum/viewtopic.php?p=420104

dentree · Posted: Tue Jan 20, 2015 10:36 am Post subject:

Thanks

CasetheCorvetteman · Joined: 09 Nov 2008 Posts: 6326 Location: Australia

As seen in the pic i received, both are dead and should be replaced. The large capactitors that are probably near there should also be replaced unless they test perfect.

Those are not resistors as such, youd probably find theyre well under 1ohm if they were good. Find the reason they blew before you put it back in service.

dentree · Posted: Wed Jan 21, 2015 12:45 am Post subject:

I seem to have run out of upload space, can anyone tell me if, and when that situation will reset?

**kal** · Posted: Wed Jan 21, 2015 1:05 am Post subject:

CasetheCorvetteman · Joined: 09 Nov 2008 Posts: 6326 Location: Australia

Create a free account at www.photobucket.com and host them there Wink

CasetheCorvetteman · Joined: 09 Nov 2008 Posts: 6326 Location: Australia

The components in question there are what i would call 'sacrificial resistors'

cosaw · Posted: Wed Jan 21, 2015 5:56 pm Post subject:

I think Barco refers to them as 'Safety Resistors', though I could be mistaken - I'm going off memory. From my own experience, they're usually red and very low ohmage, like 0.1R or something. I call them, fusible resistors and yes, as far as I understand they're there to protect other components. I've found them hard to get hold of in that resistance value as then you're usually talking about ceramic wirewounds. You'll need to find the other faulty components otherwise the SR resistors will just blow again as they're intended to.

Mostly repeating what others have said but at least we're all on the same page.

dentree · Posted: Thu Jan 22, 2015 9:00 am Post subject: Barco Cine 8

Thanks for all the input Guys, The local electronics repair shop were not sure about there resistors, he was suggesting a ceramic type device, but not sure of the value so I thought it best to check in with you guys first.

In any event he did not have anything like what is in the tray

With regard to further investigation of this board (this board is the CINE 8 one) it was non functioning in the CINE and did not function in the BG 808.

Transferring the convergence and COG board to the BG808 tray worked and fixed all the error codes, so now I am left with the CINE 8 tray with the BG 808 convergence board installed with the suspect driver board, apart fro Casey's mention of checking the 2 large capacitors (close by)

Given that the rest of the CINE 8 is up and running at this point with no known issues, it seems to me that any additional fault (after replacing these resistors, and checking the Caps)on the CINE 8 board, would point to additional problems on that tray and not from the main boards in the rear of the projector