It´s getting more and more interesting...
First, it´s indeed a FDC6330L switch (U10), pinout matches with the results I´ve get with scope.
Second...
No need to solder a testlead, the tip of the scope probe is small enough - But the cam must be disassembled, I couldn´t use its battery, so I connect a PSU adjusted to 7.2V and appx 750mA on it.
Surprise:
After pressing on, PSU reaches the limit...Hm? OK, more current...
Pressing start and two things happen.
Initial input current is above 1A
And: First time ever I´ve heard the internal beeper while starting...
After this, current decreases to "stable" 520mA - Boy, didn´t expect so much.
Then measuring and yes, it´s like fraser wrote, the input signal is 1sec width and got an amplitude of 3.3V .
And this will periodicly happen every minute....
Watching the current meter on the psu, when input pulse appear, current rises over 800mA...Hm...
Measuring the output to the solenoid....aha, output is given !!!
What´s going on here...And I don´t know what I´ve done, I´ve moved the spring letting the shutter one time "flipsing" manually - After this, shutter is always active for 1 sec every minute until I´ve stopped the measuring.... or that was pure coincidence - Then I got a strange feeling gentlemen.
The Accu which comes with the trotec was claimed as "new" from the (private) vendor.
Looking at his specs...1000mAh...
I´m not a expert what accus concerns but could it be that this is simply too weak...??
Remember, I´ve heard the beeper sound for the very first time as the external PSU was connected.
Must think about it, here some pics..