CurtPalme.com Home Theater Forum

winny

It worked last time I tured it on one year ago but now the image (all tubes) flashes on-off every second. Menues are shown correct when the image is on.

Board 1089195 have a red LED flashing at the same rate. All G2-LEDs appear green.

I'll try to post a video and some photos if it helps.

[img]http://www.curtpalme.com/forum/download.php?id=20061&sid=81de7f04251fc99c5e75b842061a3410[/img]

winny · Posted: Thu Mar 05, 2015 8:38 pm Post subject:

I have the service manual for 1209s and the red LED D40 on the Sync+Vertical deflection board is comming from the coincidence detector.

What does this mean?

winny · Posted: Sat Mar 07, 2015 2:52 pm Post subject:

I have fiddled around some more today with this and depending on resolution, the flashing changes frequently slightly and goes away slowly as the projector heats up after a few minutes.

Any clues?

**Curt Palme** · Posted: Sat Mar 07, 2015 3:14 pm Post subject:

Does the internal test pattern flash as well, or is it solid? What does the internal test pattern do if you disconnect the input completely?

winny · Posted: Sat Mar 07, 2015 3:21 pm Post subject:

No inputs connected yet. Just internal patterns so far.

**Curt Palme** · Posted: Sat Mar 07, 2015 3:24 pm Post subject:

Post a video of what it's doing please.

winny · Posted: Sat Mar 07, 2015 3:32 pm Post subject:

Freakin android! A few seconds of video becomes tens of MB and need third party apps to compress it.

Working on it...

winny · Posted: Sat Mar 07, 2015 4:17 pm Post subject:

https://www.youtube.com/watch?v=8H8JGpnIumw&feature=youtube_gdata_player

**Curt Palme** · Posted: Sat Mar 07, 2015 4:20 pm Post subject:

Never seen that before, but it seems to only be the green tube doing it?

Try disconnecting the green CRT socket and HV lead, and see if the R and B tubes are OK. If so, try swapping CRT sockets/video amps between tubes. If it stays with the green tube, it could be an issue on the G2 board, one of the two video switching/quad decoder boards, or worst case, the tube.

winny · Posted: Sat Mar 07, 2015 4:28 pm Post subject:

It's all three flashing synchronous.

I filmed straight into the green tube since it isn't set up yet.

**Curt Palme** · Posted: Sat Mar 07, 2015 4:34 pm Post subject:

OK, then disconnect the tubes one at a time, the CRT socket and the HV lead.

I have seen this a couple of times in a planetarium, but when in the G2 setup mode, which the 1209 doesn't have. The set would flash, and it was due to low emission of the tubes, that sent the G2 setup into spasms. I have not seen this in a 1209.

winny · Posted: Sat Mar 07, 2015 6:03 pm Post subject:

On-screen. Also showing the change with resolution.

https://www.youtube.com/watch?v=hK1FSuRA5JU&feature=youtube_gdata_player

**Curt Palme** · Posted: Sun Mar 08, 2015 3:55 pm Post subject:

All I can tell you is that it appears to be video related, and not HV related.

winny · Posted: Sun Mar 08, 2015 4:01 pm Post subject:

Indeed.

So what does D40/coincidence detector mean since it indicates this along with the flashes?

**Curt Palme** · Posted: Mon Mar 09, 2015 1:45 pm Post subject:

It means it is losing sync, but that doesn't explain the flashing.

I have lots of parts for the 1208/1209 for cheap, I can put together a box of them if you want. Shipping might run $100 or so, plus another $100 or so for the boards.

winny · Posted: Mon Mar 16, 2015 12:17 pm Post subject:

That would be great! Problem is getting worse. It refuses to sync to anything now before it heats up (~5 mins).

You stíll have my email?

CasetheCorvetteman · Joined: 09 Nov 2008 Posts: 6319 Location: Australia

Try swapping the switcher card.

winny · Posted: Mon Mar 16, 2015 1:37 pm Post subject:

Ok, that would be which R-something-something-lots of numbers-board for a noob like me?

CasetheCorvetteman · Joined: 09 Nov 2008 Posts: 6319 Location: Australia

In the back of the set, second from the end.

Have a look at the layout in the tips section.

My Cine 9 recently did something simular.

winny · Posted: Tue Mar 17, 2015 3:06 pm Post subject:

RGB switcher board R762720? Are they in any shapre or form compatible with the same from 80x-series or 120xs-versions but with slightly different number?

Someone asked the very same question on AVS http://www.avsforum.com/forum/16-crt-projectors/845438-parts-list-barco-graphics-1209s.html#post10502887, which might even have been _my_ projector ten years ago since it came from there. No answer though...