devere 8x10 help

[andrewfrith]

Hi..hoping that someone has experience with a Devere 8x10 Vertical enlarger..its has the 108 Dichromat head (8 x 250W halogens).

I recently was perhaps crazy enough to bring this beast into my darkroom. I got it from a big print operation that had gone to lambda's etc so they wanted the devere out of there. It was in good condition and working fine, and I personally saw it in operation. It was carefully disassembled and transported back to my house. It has been re-assembled and an electrician helped me hook up a 30A 250 volt circuit for it.

Power seems to be running fine to the enlarger. blower is blowing, hand controls are moving the motorized stages up and down the column. But the lightsource is issuing a high pitched tone when the focus switch is turned on. Power seems to be getting to the head as the filtration dials are illuminated.

From the manual i have, in the troubleshooting section, it says the high-pitched tone indicates a lamp is blown. So i used an ohmmeter to check each bulb and they all seem to be OK. I do have a set of replacement bulbs, but as the current set are all looking ok on the meter, does it make sense to swap them out? seems like something else is going on and triggering the warning alarm?

If anyone has experience with this enlarger is there anything that i should be looking at?

thanks
-andrew

 

[Donald Miller]

Since you have an ohm meter, I would assume that you have the capability of checking voltage as well. I would think that the next order of business would be to trace voltage availability to the lamp sockets and if not present begin working backwards to the open circuit.

 

[andrewfrith]

fixed

Thanks for the reply don...i went back and checked the lamp holders with my meter..they checked out good too..then when i went and tried it again..voila! working enlarger..must of been a loose contact. Thanks again for the advice.

best
-andrew