Durst Laborator 184 --Help!!

[o.gok]

Hi,
We are trying to repair the enlarger we have it in school. The last repair was done by the guy who repaired the metaform processor of the school. He is quite old and we couldn't find anyone who is up for the job.
The system we have is Durst color laborator 184, with EST 301 power supply and Tim 1000 Timer.



A couple of months ago, when I was using the machine the bulb burnt out and whatever lamp we tried afterward immediately burnt out.
We first suspected the power supply. But the timer was checked by an electrician and it didn't pass the inspection.


We recently tried a new timer, not a Durst but a Hauck branded one. As we run out of bulbs we couldn't try it. But we measured to voltage with a voltmeter and it reads 150 Volts. Do you think that is the problem? I guess we should have a reading of 120 volts. And if that's the problem shall we fix or replace the power supply?
We think someone modified the sockets, as the enlarger now takes 300 W ELH lamps.



We would really appreciate any leads!

[o.gok]

Connections to EST 301:

Attachment 191552

Hauck timer:

[o.gok]

https://www.largeformatphotography.i...=1#post1410348

hmm maybe try with two lamps, and problem will be solved?

[Drew Wiley]

ELH is the correct bulb for a CLS301 colorhead intended for USA usage. But you need both in place or the unit will not function properly. And I recommend replacing both at the same time. I prefer to use a modern 750W Gralab timer. If there's an issue with the power supply itself, you might have a real headache; replacements aren't available, and fishing around for a used one might just introduce more of the same kind of problems. What I do is dispense with the power supply entirely, route the cooling fan directly to a 240V outlet, and segregate the color head itself to a dedicated 115V line, with the timer connected to that. Test your outlets first with a good volt meter, to make sure they're within tight specification. But just try fresh bulbs first.

[ic-racer]

EST301 repair instructions (Deutsch)

[ic-racer]

[ic-racer]

[ic-racer]

[Oslolens]

If the Durst is used for b&w only (I suspect not), skip the fan, use a normal timer, a correct power supply and LEDs, either 5m of strips inside a tube or cone or a roof fixture of correct diameter.

Big Wehman, Toyo 5x7" and a small Chamonix

[o.gok]

ELH is the correct bulb for a CLS301 colorhead intended for USA usage. But you need both in place or the unit will not function properly. And I recommend replacing both at the same time. I prefer to use a modern 750W Gralab timer. If there's an issue with the power supply itself, you might have a real headache; replacements aren't available, and fishing around for a used one might just introduce more of the same kind of problems. What I do is dispense with the power supply entirely, route the cooling fan directly to a 240V outlet, and segregate the color head itself to a dedicated 115V line, with the timer connected to that. Test your outlets first with a good volt meter, to make sure they're within tight specification. But just try fresh bulbs first.

Thanks Drew. Yes we have the CLS 301 colorhead. We were using 120V, 300 watt lamps. They are not so hard to find in Germany and they cost around 12 euros. The EST 301 has 120 V output, and that's how we were able to use the lamps.

If the new lamps don't work, hence we have a problem with the power supply how can we connect the head to the 120V line (We will need a transformer for that as the mains is 240V here)? The connection seems proprietary?
Colorhead 120V: