Problem with the intensity of the light on my Durst M670

clauss · Jun 8, 2019

Hi, I'm having a problem with my Durst M670. The light is very inconstant, it keeps shifting its intensity. Something it's almost imperceptible but sometimes it looks like someone is playing with a dimmer switch. And it's ruining my prints.

I already changed the bulb, but the problem continues.

Any suggestions? Here's a picture from the inside of the head.

logan2z · Jun 8, 2019

Have you tried cleaning the contacts in the bulb socket? I had a similar problem with my Leitz v35 but cleaning the contacts solved it.

clauss · Jun 8, 2019

logan2z said:
Have you tried cleaning the contacts in the bulb socket? I had a similar problem with my Leitz v35 but cleaning the contacts solved it.

How can I clean it?

ic-racer · Jun 8, 2019

I'd replace the lamp socket.

https://www.photrio.com/forum/threads/omega-d5500-lamp-socket-replacement.85653/

logan2z · Jun 9, 2019

clauss said:
How can I clean it?

I don't know what type of socket the Durst has, but the Focomat v35 has a socket that has two small female connectors. I took a small sewing needle and moved it around inside each female connector to clean them out. A rather low-tech solution but it seemed to do the trick. As ic-racer suggested, replacing the socket would be another way to go

clauss · Jun 9, 2019

I took some more pictures of the socket:

pentaxuser · Jun 9, 2019

This has happened to me as well. One solution is the one mentioned which is cleaning out the female part of the socket with a needle or very small file and it might be worthwhile to clean the male ends on the bulb but as has been said I'd try and replace the female socket. It is sensible to keep a spare bulb. The bulb may be on its way out anyway so I'd also replace the bulb

pentaxuser

logan2z · Jun 9, 2019

clauss said:
I took some more pictures of the socket:
View attachment 224915 View attachment 224916 View attachment 224917 View attachment 224918 View attachment 224919

Looks like the same one used in my Focomat v35.

ic-racer · Jun 9, 2019

It is one of the most common lamp sockets world-wide. Used in billions of applications. They fail frequently, so replacement is in order.

clauss · Jun 9, 2019

ic-racer said:
It is one of the most common lamp sockets world-wide. Used in billions of applications. They fail frequently, so replacement is in order.

Yes, I just ordered this pack with 5 (sorry for the french link, I live in France). It says GU5.3/MR16 socket, but I think I can use it with my bulb (OSRAM 64627 HLX EFP 100W 12V MR16 GZ6.35).

clauss · Jun 17, 2019

Just an update: I changed the socket and everything is back to normal.

logan2z · Jun 17, 2019

clauss said:
Just an update: I changed the socket and everything is back to normal.

Excellent!

Problem with the intensity of the light on my Durst M670

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