Newly acquired Durst AC800 Elite needs some work.

John Francis · Aug 23, 2021

Johnkpap said:
Hi John and Adam
Welcome to the world of the Durst AC800.....if you both send me a a Email address that can handle 20 meg i can sen you all my saved manuals ect including the Service manual

With regards to the memory battery:- I and a few others have replaced it with 3 x AA nicads soldered togeather in a pack, the replacements must be NICADS or they will damage the charging cct. Remember this is old 1980's technology that is why it is fixable

AS You need to un-solder the old by now corroded pack, if you are not skilled in electronic repair find some one who is to do the work for you !!!! I will include the photos of how to do it
when I email you the manuals.

John Frances:- as you are also in Australia, I can Make you up a replacement Batt's at cost and send them to you, if you can't sort them your self

With regards to lenses you need to dedicate 3 of them for that enlarger:- lens 1 50mm lens 2 80mm (75mm will also work) and lens 3 105mm or 100mm and only use these lenses with this enlarger. you will need to change the light box for each format if you have them, if you are printing multigrade buy a set of new filters and also dedicate them to that enlarger

Regards

Johnkpap

Hi John

Thanks for the reply. I managed to get the 1996 manual from gordrob's link (see his post above Adam's) If it is the same as yours I only need the service manual and anything that is different.
I've got the mixing boxes for them 24 x 36 & 6 x 7 (the 6 x 7 will be fine for 6 x 6) as for lenses, not a problem I have 50, 80 & 100mm Componon-S lenses.
As for the batteries when i see what's involved I'll get back to you.
Email: landsberger892@gmail.com

Regards
john

PS I'm not sure about doing Multigrade with Durst 800's as I have 2 Focomat V35's one with a colour head and the other one has B/W head & a Multigrade head.

gordrob · Aug 23, 2021

From a service manual that I saw around 2005, there was two service manuals published at that time. Units manufactured with numbers starting with 61026747 were equipped with new types of PCBs and require service manual version 2. Models prior to 61026747 need the version 1 service manual.

John Francis · Aug 23, 2021

gordrob said:
From a service manual that I saw around 2005, there was two service manuals published at that time. Units manufactured with numbers starting with 61026747 were equipped with new types of PCBs and require service manual version 2. Models prior to 61026747 need the version 1 service manual.

Thanks for that information! Now a quick question where is the serial number located? I just had a look and can't see it anywhere obvious.

John

gordrob · Aug 24, 2021

The number should be on a tag on the back of the colour head below where the data cable comes from the power box to the colour head
Gord

John Francis · Aug 24, 2021

John Francis said:
Hi John

Thanks for the reply. I managed to get the 1996 manual from gordrob's link (see his post above Adam's) If it is the same as yours I only need the service manual and anything that is different.
I've got the mixing boxes for them 24 x 36 & 6 x 7 (the 6 x 7 will be fine for 6 x 6) as for lenses, not a problem I have 50, 80 & 100mm Componon-S lenses.
As for the batteries when i see what's involved I'll get back to you.
Email: landsberger892@gmail.com

Regards
john

PS I'm not sure about doing Multigrade with Durst 800's as I have 2 Focomat V35's one with a colour head and the other one has B/W head & a Multigrade head.

Got all the emailed info so many thanks for that, I see what you mean about the battery pack location!
One more question does anyone know if the power supply on the AC 800 is stablised?
I have a mains 240 constant voltage unit (max load 100v/a) which I run the Focomat's on, because at times our power here can be a bit uneven and have quite a variation sometimes by +/- 20 volts.
It would be easy to put a multi distribution board on it and have all the enlargers and the analyser and timers for the Focomats permanently connected but not all on at the same time!

Regards
John

sruddy · Aug 24, 2021

Here is what I did to upgrade the backup battery to replaceable rechargeable batteries.

Johnkpap · Aug 25, 2021

John Francis said:
Got all the emailed info so many thanks for that, I see what you mean about the battery pack location!
One more question does anyone know if the power supply on the AC 800 is stablised?
I have a mains 240 constant voltage unit (max load 100v/a) which I run the Focomat's on, because at times our power here can be a bit uneven and have quite a variation sometimes by +/- 20 volts.
It would be easy to put a multi distribution board on it and have all the enlargers and the analyser and timers for the Focomats permanently connected but not all on at the same time!

Regards
John

The powersuplly in the AC800 is fairly stable small fluctuations should not be a problem

Johnkpap

John Francis · Sep 24, 2022

John Francis said:
Got all the emailed info so many thanks for that, I see what you mean about the battery pack location!
One more question does anyone know if the power supply on the AC 800 is stablised?
I have a mains 240 constant voltage unit (max load 100v/a) which I run the Focomat's on, because at times our power here can be a bit uneven and have quite a variation sometimes by +/- 20 volts.
It would be easy to put a multi distribution board on it and have all the enlargers and the analyser and timers for the Focomats permanently connected but not all on at the same time!

Regards
John

Johnkpap said:
The powersuplly in the AC800 is fairly stable small fluctuations should not be a problem

Johnkpap

Hi John
Could you re-send the manuals you sent before. For some reason the stupid computer has suddenly decided that it cannot open some of my pdf's including all my durst stuff

Regards
john

John Francis · Mar 14, 2023

Johnkpap said:
Hi John and Adam
Welcome to the world of the Durst AC800.....if you both send me a a Email address that can handle 20 meg i can sen you all my saved manuals ect including the Service manual

With regards to the memory battery:- I and a few others have replaced it with 3 x AA nicads soldered togeather in a pack, the replacements must be NICADS or they will damage the charging cct. Remember this is old 1980's technology that is why it is fixable

AS You need to un-solder the old by now corroded pack, if you are not skilled in electronic repair find some one who is to do the work for you !!!! I will include the photos of how to do it
when I email you the manuals.

John Frances:- as you are also in Australia, I can Make you up a replacement Batt's at cost and send them to you, if you can't sort them your self

With regards to lenses you need to dedicate 3 of them for that enlarger:- lens 1 50mm lens 2 80mm (75mm will also work) and lens 3 105mm or 100mm and only use these lenses with this enlarger. you will need to change the light box for each format if you have them, if you are printing multigrade buy a set of new filters and also dedicate them to that enlarger

Regards

Johnkpap

Hi John

What would be the cost two battery packs (either Nicad or Nimh) +postage?

Regards
John

sruddy · Mar 14, 2023

John Francis said:
Hi John

What would be the cost two battery packs (either Nicad or Nimh) +postage?

Regards
John

John Francis · Mar 31, 2023

John Francis said:
Hi John

What would be the cost two battery packs (either Nicad or Nimh) +postage?

Regards
John

Found out that beccause the durst was designed for Nicad batteries it's charging circuit will ruin Nimh batteries. I managed to buy a 3AA size battery holder with flying leads. but had to order online the Nicad's as nowhere in Perth could I get them or on eBay Australia..

31899 · Nov 18, 2023

Wilf said:
Hi Sruddy, Hi Zebra-K,
Yes, the new document is an improvement and I am grateful too that it was uncovered and updated.
However I am not convinced yet that the Durst AC 800 does not work with Multigrad with the inbuilt filters.
I have used the AC 650 for years and it is much less complicated compared to the AC 800 but uses the
same filtration method that the AC 800 has. Most people think that Multigrad would not work on the AC 650,
but it does.
I only got my own AC 800 Elite recently and time will come when I will try it out with Multigrad with the inbuilt filters.

By the way I do repair the AC 650 and AC 800 for the German community and I do have the schematics
and the service manual in English.
I got those from the US from a company that many years ago purchased a whole lot of left overs from Durst in Brixen
and I paid them 100 $. But for the community here I would share the documents free of charge.
Anyone interested just send send your mail contact and I can send the files.

Hi there! I just picked up a Durst AC800 and am looking for repair manuals for it. Do you by chance still have the service manuals for yours? I am more than happy to provide my email via a pm.

31899 · Nov 18, 2023

sruddy said:
Sorry, I do not have the service manual. Here are two photos showing my repair. Do not put a rubber grommet like I did, as it puts the lead too close to the top cover, and it will pinch. I removed it once I discovered my error. The circuit boards are easy to remove however don’t try and take the connecting ribbons off. Remove them together as an assembly. Don’t forget to replace the cardboard separator when re installing them. Make sure the battery didn't leak and take out any components near it. You can see in my photo I had to replace the surrounding resistors. After your done turn your unit on and leave it on over night. Then proceeded with your programming. My enlarger still has factory settings which match the manual.

Hi there! Your photos are no longer active, do you still have them by chance?

31899 · Nov 18, 2023

sruddy said:
This is an older version. I have been working with David and have version 2.0, which is the latest. I'll post a link later today or tomorrow.

Download link for version 2.0 https://steveruddyphotography.com/images/Forum_mages/Black-and-White Printing with the Durst AC800AF latest.zip

Hi there! The Version 2.0 link is now dead. Would you by chance have a copy of the updated version available?

gordrob · Nov 19, 2023

31899 said:
Hi there! I just picked up a Durst AC800 and am looking for repair manuals for it. Do you by chance still have the service manuals for yours? I am more than happy to provide my email via a pm.

Make sure you match your serial number with the service manual information below from a previous post. I still have some parts from a AC800 that is defunct if you need something.

"From a service manual that I saw around 2005, there was two service manuals published at that time. Units manufactured with numbers starting with 61026747 were equipped with new types of PCBs and require service manual version 2. Models prior to 61026747 need the version 1 service manual."

Gord

sruddy · Nov 20, 2023

I haven’t seen a service manual, all I have is the user manual which I see available for download.

sruddy · Nov 21, 2023

Durst AC 800 Manual

Durst AC 800 Read more about lens, durst, enlarger, exposure, pressing and calibration.

www.yumpu.com

pierpa010 · Apr 3, 2025

Hello everyone,i know it's a long shot, does anyone have the Version 1 Service Manual for this enlarger? ifound the version 2 thanks to john (thanks a lot man!!!!) but i need the version 1.

John Francis said:
Hi John

Thanks for the reply. I managed to get the 1996 manual from gordrob's link (see his post above Adam's) If it is the same as yours I only need the service manual and anything that is different.
I've got the mixing boxes for them 24 x 36 & 6 x 7 (the 6 x 7 will be fine for 6 x 6) as for lenses, not a problem I have 50, 80 & 100mm Componon-S lenses.
As for the batteries when i see what's involved I'll get back to you.
Email: landsberger892@gmail.com

Regards
john

PS I'm not sure about doing Multigrade with Durst 800's as I have 2 Focomat V35's one with a colour head and the other one has B/W head & a Multigrade head.

Newly acquired Durst AC800 Elite needs some work.

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