DURST TIMER

I have a Durst Enlarger Timer that I would like to do a spot of preventative maintenance on.
It is electro mechanical and quite clunky when the switches operate.
It must be thirty years old at least.

Could anyone tell me how to safely open the case, the only screws visible are holding a cable grommet in place. No other screws in sight.
There is no model number on it, so I hope someone recognises the model and can advise accordingly.

Thankyou in advance.

Looks like a Viponel s15 timer...

BobUK I couldn't find any Durst timers exactly like yours but of the one reference I found the case was opened by removing the rubber feet on the bottom by unscrewing them and underneath were the screws holding the top of the box

If yours has rubber feet check if they unscrew and reveal more screws securing the top box

I have just seen the first reply and yes it does look exactly like the Viponel s15 and if so it may be easier to Google against this model. I found another thread on it and at the time, just over 5 years ago oldtimercameras.com had a manual on it. Be aware that the manual is probably an instruction manual and not a repair/maintenance one so I'd ring them first to see if (a) it still has a manual and (b) does it cover anything on dismantling

I hope this helps

pentaxuser

Thank you Peter and Dali for your inputs.

I removed the rubber feet, but no screws there on this model.
I then removed the dial and couldn't see a way in.
A few days later I attacked it again via the dial and finally got into it.

FIRST DISCONNECT FROM THE POWER SUPPLY.

Undo the grub screw in the side of the rotary setting knob. Lift off the knob.
The clear dial cover will then lift off.
Note the position of the setting hand. It will make things a lot easier when reassembling.
The setting hand can be levered up using a couple of suitably sized screwdrivers. Place a couple of pieces of rigid plastic under the screwdrivers to prevent damage to the clear plastic from the screwdrivers.
Lift off the graduated plastic dial.

Then the bit that I did not find first time around....... There is a matt black card held against the timer body, held in place with small pieces of double-sided stick tape. I could not see this in my not to well lit shed.

With the dial, hand and card removed you can see the neon and two screws.
Remove the two screws and you can then lift off the top half of the case.

I gave the bearings and push buttons a quick oil change and used some contact cleaner on the timer contacts.

It does take a bit of tweeking to get the timing back in synch using a separate stop clock.

Reassembly is just the reverse of what you have done.

Thanks again gents.


Sorry for the poor quality pictures. I didn't realise they were that bad when I took them.