Durst 606 bulb not lighting up

[Lanline]

I have a Durst 606 that someone gave me a long time ago and I went to clean it up today, so I can give it to someone that needs an enlarger. I plugged it in to test the lamp and it failed to light.

1. So I plugged in my enlarger in that socket and mine works. WALL SOCKET GOOD
2. Tried the inline cord switch several times.
3. Removed the bulb and tried another bulb - nothing.
4. Tested the original bulb in a light socket it works.
5. The cord looks to be fine.

Does anyone know if there is a fuse on these somewhere? Any suggestions of things to look for? Going back to the studio with a continuity tester and see if that helps.

 

[wiltw]

Maybe the switch contacts are bad, so although it clicks it connects no electricity to the bulb housing.
With access to a multimeter (Ohmmeter) it would be easy to diagnose.

 

[shutterfinger]

Bad light socket would be my guess. Heat from the bulb eventually causes the socket to go bad.
Clean the contacts and ensure the center contact of the socket contacts the bulb when installed.
Unplug to do any maintenance.

 

[Lanline]

It was the contacts, I UNPLUGGED it and cleaned the socket contacts. They were heavily oxidized. Thanks for the suggestions!