Film-Tech Forum ARCHIVE: Need help with Kinoton ST-500E

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Posted by Paer Hoegberg (Member # 3133) on 05-06-2006, 05:12 PM:

Our Kinoton ST-500E platter is connected to 2 projektors (2 screens).

Last week the middle platter stop working - after fixing (replacing a IC from another ST-500) it looks as the platter is set up for use with one projektor. When starting one of the projectors alla 5 platters aktivates (the platters with brain inserted).
Now only one screen can use the platters.

Someone who has a hint what to look for?

/Pär

Posted by Demetris Thoupis (Member # 833) on 05-08-2006, 01:06 AM:

Remove the brains from the platters you do not want to operate. These platters might be connected with the automation to the projector and when the projector starts a start signal is given to the platter. You have two options. Either remove the brains (give out in the middle) or the cable connecting the platter with the projector.

Posted by Paer Hoegberg (Member # 3133) on 05-08-2006, 01:45 AM:

No - we need the operation of 2 projectors at once.

Posted by Adam Martin (Member # 641) on 05-08-2006, 07:43 PM:

While I haven't worked with any 35mm Kinoton platters, they *did* design the QTRU for Imax. In that platter system, there is a wire jumper that needs to be removed for multi-payout use.

Posted by Michael Schaffer (Member # 1204) on 05-09-2006, 11:05 AM:

Which IC did you change? IIRC, the ST500E has two control boards, one of which controls two, the other board three platter decks. I am sure you know everything about the ABCDE and XY switches and the correct settings. Which set of platters is running which isn't supposed to? In other words, which of the two projectors now apparently controls all decks? I bet it's the one which normally controls the top decks.
Does that condition also apply when you set the XY switch for the middle platter to the other projector?
Normally the XY switch only associates the middle platter with either X or Y.
What happens if you unplug the 5-pin plug coming from the "overruling" projector? Can you run the other set of platters with the other projector then?
Do you have the film break roller option installed?

Did you take any of the boards out? If so, it is possible that you confused the connectors for the wiring coming up from the projector inputs to the column. Verify with a multimeter that the wiring coming from the input for X also goes to the input connector to the control board, and the same for projector Y.

And always unplug the platter system when you fumble around inside! Don't just switch it off - the contact on one side of the switch is still hot when plugged in!!

Posted by Paer Hoegberg (Member # 3133) on 05-09-2006, 03:11 PM:

It was not me, but one of the other working in the Booth.
But this is how I was told ...

The IC marked "ST200E/16" on a white sticker - the one for the middle platter.

Both projectors controlls all decks. Thats the strange part. X controls ABCDE and Y controls ABCDE !

The X/Y switch position dont make any difference.
But if the connectors to the X/Y switch is disconnected from both boards the uppper platters and the lower platters are working at the correct projector.

If I unplug any of the projector, the other works fine with all platters.

No film break roller is installed in the platters (Film break is connected in the projectors (FP-30)).

Not sure - but i think the bords has been taken out for inspection.

Posted by Michael Schaffer (Member # 1204) on 05-09-2006, 06:01 PM:

Well, it looks like the X/Y switch is a very strong suspect here. Maybe it is shorted. You should check it with a multimeter for continuity and open. If you can't figure out which lines should be open and which shirt in either the X or Y position, simply compare with the switch on the known working projector.

That switch doesn't do anything but route the RUN (when the projector runs) and FILMRISS (film break) lines from the board ST-80-21/01 to which projector Y connects to inputs for these two lines on the board ST-80-01/04 to which projector X connects. These inputs may or may not be marked (you never know with Kinoton) 1234 where 2 EXPAND RUN and 3 EXPAND RISS would be the input to that "X" board, and 1 EXPAND RUN and 4 EXPAND BREAK would be the outputs from that "X" board. So what the switch does is either route the two outputs from the "Y" board to the inputs of the "X" board, or when in the X position, simply route the "X" board outputs back to its own inputs.

When you have checked the switch and verified it's either OK or gone, you could also jumper outputs to inputs on the "X" board, then the platter should run normally with the middle platter assigned to the upper set of decks. If not, there may be something fishy with that board or the motor control board for the middle platter. I think at that step, only swapping the boards with known working ones will help you isolate the culprit.

The interesting thing here is that with the switch in the X position, there should be no connection to the "Y" board of the RUN and Riss lines. So even if there is something wrong with the motor control for the middle platter, it shouldn't control the lower set of platter when in the X position. It is quite possible that the system took a hit and you may find several faulty components. The strange behavior you describe with the switch cennected and siconnected certainly suggests that checking the swith and its connections to the two boards shouldn't be a waste of time.

But it looks like you should at least be able to play with both projectors when you disconnect the XY switch until you find the problem.

Posted by Paer Hoegberg (Member # 3133) on 05-10-2006, 02:48 PM:

Both boards are of type ST-80-01/06.

We have changed both boards, same result.
Now the only thing left to check is the X/Y switch. Tomorrow...

If the switch is connected to X-board, the middle platter works with the X-projector - the position of the switch dont matter.

Posted by Michael Schaffer (Member # 1204) on 05-10-2006, 07:08 PM:

Does it still control the bottom three platters in that config? I guess not. It might also be possible to assign the middle platter to the bottom stack by only connecting it to that one board.

I think it's already quite obvious that the switch must be wasted, if the system works with the top three platters assigned to X and if it doesn't control the lower platters when the switch is simply disconnect from Y but not from X - that is exactly what the switch does when it is properly connected and working.
Does it say ST-80-01/06 on the board itself? These are the standard 3-platter boards. Do you have two identical ones with identical inputs/outputs (3 on each board)? How is the middle platter connected? In that configuration, it should be connected to the bottom respectively top input of the two boards and then allow the switch to assign the input/output to the sensor assembly of the middle platter.

Posted by Paer Hoegberg (Member # 3133) on 05-11-2006, 10:53 PM:

The middle platter is connected to the lower part of the upper board, and the top part of the lower board is empty (no connection and no IC).

Posted by Paer Hoegberg (Member # 3133) on 05-17-2006, 01:10 AM:

Now the upper board are replaced with a new board and everything works.......

But.
At first the X/Y-switch didn't work with the new board.

After comparing the old board to the new we found that we had to cut the wiring between pins 1 & 2 and 3 & 4 (on the connector to the X/Y-switch) on the new board.

Pär