How to remove SEMU from Barco 909 / Cine 9

Roland @ B4 · 07-07-2009, 11:32 AM

Hello I'm hoping somebody can help.
After years and years of working with CRT's I'm stuck

I have a Barco Reality 909 with SEMU (soft edge modulation unit) fitted.

All is fine when the boards are connected except I very slowly over about a minute lose the green signal. I now have a second projector do the same to red and blue.

My understanding is that when the SEMU is switched off in the service menu then the boards should not affect the signal, I'm not conviced so I want to rip them out. Display is a single projector so they are not needed.

HOWEVER

I have removed the soft edge card and two connectors from the RGB input card.
I have also removed the SEMU board from the main controller

Probelm is the picture is now muted!! I can see on the face of the tube a very faint picture

If I increse contast and brightness the levels rise like turning up the G2 (if that was possible on a 909) but the actual image is muted almost greyed out.

I've missed something crutial I know but I don't have an instal manual for the SEMU unit

Can any one help or have the manual the can send me

roland at b4projection.co.uk

Tom.W · 07-07-2009, 6:36 PM

I've also been looking for the service manual for the 909. If SEMU is turned off I would suspect something else might be going on. When the Green tube goes out what readings do you get from the self diagnostics display ?

Andy might be able to help you with this.

Wish I had one to play with !

Tom.W · 08-07-2009, 7:11 AM

Got it working now ?

Roland @ B4 · 08-07-2009, 9:55 AM

Projector working but only with the SEMU in place just can't figure out how to remove it and retain full brighness.
At the moment I am pointing at J5 of the RGB driver card. Normally pins 1&2 and 3&4 are shorted but with a link to cut that isolates the pins for when SEMU is engaged.

Roland @ B4 · 08-07-2009, 10:35 AM

SHE LIVES !!!

Simple things as always.
I had to make up a jumper wire linking pins 1&2 3&4 5&6 (7 and 8 remain free ending)
Picture came up bright and stapble straight away.
Thanks for your help

Tom.W · 10-07-2009, 5:35 AM

Did you get the HV issue settled ?

Mad Mr H · 10-07-2009, 7:42 PM

Yes you need to replace the jumpers.

Without the SEMU card in place there is usually a pre built jumper in place.

"Peter" (Spotmatic) with the 909 had the same issue and I sent him the jumper.

Mike Parker

could not sort it either

.

For info with the 1209s there are wires that you cut and can then replace.