Durst Optimo AC w/Durst Opto-ECU Troubleshooting

clarkey1234

Member
Joined
May 26, 2020
Messages
2
Location
Australia
Format
4x5 Format
Hey all,

I have an issue regarding my Durst Optimo AC enlarger with Opto-ECU unit. The Opto-ECU unit reads "Durst Optimo AC setup Version MA.47.30.T/MA.47.32.R" without any change. The enlarger head moves slightly (it is located at the top of the rail), but only does upon startup. The ECU unit appears to be frozen as it does not change from the previously mentioned text, and I cannot push any buttons. Has anyone else had a similar issue?
 
OP
OP

clarkey1234

Member
Joined
May 26, 2020
Messages
2
Location
Australia
Format
4x5 Format
Yes,

It had been working. I was just about to create a print and then the system froze up.
 

AgX

Member
Joined
Apr 5, 2007
Messages
29,973
Location
Germany
Format
Multi Format
I have a faint memory that a few weeks ago we had a thread on a similar case involving a Durst horizontal enlarger.
 

koraks

Moderator
Moderator
Joined
Nov 29, 2018
Messages
23,443
Location
Europe
Format
Multi Format
Old electronics acting up. It may be something as simple as some capacitors being degraded, which is a relatively easy fix. But it may also be more complex and difficult to troubleshoot without a schematic, a scope and a DMM - and the necessary knowledge of electronics. Without a schematic you're pretty much in the dark with this kind of equipment.
 

koraks

Moderator
Moderator
Joined
Nov 29, 2018
Messages
23,443
Location
Europe
Format
Multi Format
AgX said:
Well, a AMM would work too...
Click to expand...
Sure, but dmm's are more common today. However for some parts if these circuits a scope can be quite essential; durst is known to use analog oscillator circuits for eg driving stepper motors. You want to be able to visualize the oscillator behavior if there's a suspected problem with those.
 

AgX

Member
Joined
Apr 5, 2007
Messages
29,973
Location
Germany
Format
Multi Format
Interesting, but my DMM cannot visual oscillator behaviour either.
 

koraks

Moderator
Moderator
Joined
Nov 29, 2018
Messages
23,443
Location
Europe
Format
Multi Format
AgX said:
Interesting, but my DMM cannot visual oscillator behaviour either.
Click to expand...
1: that's why I said a scope is essential in some cases.
2: I've got a Chinese DMM with a very basic scope functionality that has at least some use, although it's by far not up to the standards of a decent scope.
 
You must log in or register to reply here.
Menu
Log in
Register
Cookies are required to use this site. You must accept them to continue using the site. Learn more…