I have an InFocus projection unit with a bad power suppky. I have fan action, and logic board action, ( 5v, 12v, 8.5v, -8.5v, but no 28 - 60VDC)
I assume that the 28 - 60VDC is the bulb voltage since I have no lamp lighting. Is there a particular component that I should be checking? Anyone have schematics for the following?

NMB power supply SP1621
aka
IFS p/n 520-0069-04

Thanks for your help in advance.
I have access to soldering tools and multimeters.
Jeff

Schematics, not available.
Parts, not available.

Call Infocus and if it is still a supported unit you can ship it to
them for flat rate repair of around $250.

If it is obsoleted by Infocus, time to start shopping.

A very well experienced and trained technician might be able to repair
it if the part failure is a standard part without any schematic.

Infocus is factory exchange/repair only. At one time they had a few
authorized independent repair shops in the US and you might be able to
send it off to them.