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Topic: Siemens 2000 16mm projector
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David Fouracre
Expert Film Handler
Posts: 123
From: Staffordshire, United Kingdom
Registered: Aug 2013
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posted January 21, 2016 06:39 AM
Have expended many hours looking at this machine. The service manual (refered by Josef Grassman) which is in German, needs translation, so I purchased a PDF file converter to change detail to Word format in order that I could use Google Translate to make some sense of info. Good Idea (I thought) but translation was very sketchy!
The screw Olaf refered to in the shutter slot was missing and it is NOT possible to rotate the shutter control on the machine front,to change from 2 to 3 bladed mode. This failure does not appear to be covered in any tech info viewed.
I think that the sync relationship between the three shutter blade sections may be compromised.
I have now discovered a way of re-aligning the shutter sync, avoiding the need to remove the main electrical and motor gear.
However, in spite of following the placement of the three shutter blade sections to match the service data sheet, I still have no correct operation of the 2/3 bladed shutter function.
I feel that there are possibly variations in models of this machine, which are not covered within the service sheets I have accessed. Not being able to translate all detail doesnt help! I
have decided that I will spend a further 8 hours before I am forced to accept defeat, and hand this beast back to it`s owner!
[ January 23, 2016, 02:30 PM: Message edited by: David Fouracre ]
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David Fouracre
Expert Film Handler
Posts: 123
From: Staffordshire, United Kingdom
Registered: Aug 2013
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posted March 04, 2016 05:36 AM
Josef, I thank you once again for your comments.
The main switch operates as you state in non-depressed mode but does not always bring lamp on. If in this position, I depress the knob, the lamp will illuminate whilst depressed. (Switch contact trouble I presume).However, when knob push in to reverse as you describe, the motor either fails to run, and the resistor assembly glows, OR the motor runs, but NOT in reverse!
You describe a variation of switch assemblies over the years and I advise that I cannot see the switches as the front panel behind the main control knob is kept captive by the momentary motor start button (non removable) and the main cover for the resistor and rotary stud attenuator for lamp, is not removable.
The top cover is, but the main cover fixings are not viewable.
From what I observed looking down thru the top of the switching unit, there is arcing taking place when turning to the lamp position. Removal of the main knob, shows the two "wiping berylium blades" are worn especially the inner wiper. Further examination after "tweeking" the blade outwards to increase contact pressure, shows that the inner fixed contact ring of copper is arcing and appears worn-out.
Maybe I should just rectify the contact problem, and abandon the reverse function. A bench rewinder is used anyway.
It may well be that the machine has to be stripped down completely, removing the motor assembly etc, to access the switching sub-assembly properly.
A view of assemblies in the manual shows the swiching unit as a block. I doubt a replacement is available now.
Again, Josef, your help has been much appreciated and your further pointers very useful.
[ March 04, 2016, 08:47 AM: Message edited by: David Fouracre ]
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