Barco (Older Analog Projectors)

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SMPS

The switch mode power supply fails on a regular basis as it’s driven quite hard. Failures vary, there’s no set fault in these units. There are 5 fuses that should be checked with a continuity tester, these can blow as a result of a fault on the actual SMPS or a short on any other board in the set can also result in blown fuses.

As with later model Barcos , these SMPS's can have occasional bad solder joints, but at this point due to age, components can be equally as likely to be at fault if a problem creeps into the set.

One problem that these older Barcos can have is a squealing sound from the SMPS, especially at high contrast and brightness levels. This is due to the laminations of the main transformer ‘singing’ as it is loaded down. Replacement of the SMPS or the molded transformer that is located on the SMPS is the only cure.