Film-Tech Forum ARCHIVE: Looking for Barco power supply repair person.

This is topic Looking for Barco power supply repair person. in forum Digital Cinema Forum at Film-Tech Forum ARCHIVE.

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Posted by Eric Robinson (Member # 2966) on 06-29-2010, 10:44 AM:

I have a power supply: R7633708K LPS power supply, from a Barco DP100, likely the same power supply for the DP3000. The complete projector power supply is composed of 3 individual power supply units. I am referring to the individual unit.

Barco will only repair these if they are under warranty. I have two of these needing repair...anyone interested?

Posted by Phil Ranucci (Member # 3820) on 06-29-2010, 10:33 PM:

Won't they do a repair/exchange? Our unit is out of warranty and I've replaced at least 2 since then. Beware the cheesy blue connectors they use for the fan power (and elsewhere). Stupid question, did you check the fuse?

Posted by Eric Robinson (Member # 2966) on 06-30-2010, 01:06 PM:

I talked to Barco and they only provide repair exchange on warrantied units, otherwise they require that you buy a new power supply, they will not repair it for any reason.

Thanks for the heads up on the cheesy blue connector. It is rather discomforting when you seat the fan assembly because you have no idea as to the integrity of the fan connections.

One of the power supplies indeed does have a fuse problem. The fuse contacts were bent, thus creating a poor electrical contact to the fuse body. The fuse has blown and it looks like lots of heating has discolored the fuse holder contacts. I'm guessing we could solder new fuse holder contacts and install a new fuse and it would be fine. I can not seem to get any information about this power supply however, such as the schematic.

Posted by Mark Gulbrandsen (Member # 72) on 07-01-2010, 09:02 AM:

There is a very good reason BARCO will not repair it. Some of the semiconductors are obsolete on that board. Seen the same thing happen here in SLC. Theater lost SMPS boards... they brought one to me to see if I could fix it. Looked up bad parts... found them to be NLA. BARCO now has a very expensive buy more reliable SMPS card for that projector anyway. Sorry there are no schematics available from BARCO or any projector manufacturer. Be sure you have the correct SMPS firmware in the projector for the new cards(especially if this is a very old machine)older versions of SMPS firmware may not properly drive the later cards. BTW: This is one of my most hated aspects of BARCO projectors and why I won't sell them. There is NO NEED FOR A FIRMWARE DRIVEN SMPS period in any D-Cinema projector! Neither Christie or NEC use firmware driven LV power supplies.

Posted by Tom Bert (Member # 5719) on 07-05-2010, 02:43 AM:

quote:
BTW: This is one of my most hated aspects of BARCO projectors and why I won't sell them. There is NO NEED FOR A FIRMWARE DRIVEN SMPS period in any D-Cinema projector!

In Series 1 projectors Barco had “SMPS controller” firmware, which controls (=enables/disable) the SMPS. At the same time it monitors the temperatures, voltages, fan speeds,… The SMPS did its voltage conversion independently for the rest.

In Series 2 projectors they have a similar approach, but it's called ‘Fan Controller’. No other firmware-based intelligence is present on the board, except for the Fan Controller.

The on-board intelligence enables them to optimize their projector (cooling, ...) and enables remote monitoring and diagnostics.

Posted by Mark Gulbrandsen (Member # 72) on 07-05-2010, 11:17 AM:

quote: Tom Bert
The on-board intelligence enables them to optimize their projector (cooling, ...) and enables remote monitoring and diagnostics.

And elevates replacement board prices into the ludricous cost spectrum! IE: There are less expensive ways to do this that are just as effective...