Hasselblad D-Flash 40

[tim10243]

Hi,
I try to connect a Hasselblad D-Flash 40 to the Radiopopper JrX which
is working the same way as the SPOT - so my problem might be
intresting for some of you here as well. I managed to connect Nikon
speedlights (very easy) and a Metz 60-ct1 to the system - but the D-
Flash seems to be a bit mor difficult. The flash has a ttl-cord. I
cutted of the plug of this cord and got six wires: blank, yellow, red,
white, blue, green. I found out that blank is ground, yellow is fire
and red is control lamp. So I think that white, blue or green must be
quench. I tried every wire without success. Maybe I made a tiny
mistake while soldering the connectin, but I don´t think so. Now I git
some questions:

- Could it be that hasselblad is using another quench signal? For
example they open the contact instead of closing it? And if it´s so,
would it be possible to change the software of the SPOT in this way
that it would work with the D-Flash?

- Does anybody here knows a specialist for the D-Flash40?

- Has anyone a circuit plan of the D-Flash40?

Any help would be welcome.
Thanks
Tim

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[tim10243]

Hi,
meanwhile I managed to get a circuit plan of the D-Flash 40.
You´ll find it here: http://www.eyris.net/img/D_Flash40_Circuit.pdf
If someone here is able to read and understand a circuit plan like
this
I would be glad to get a tip, where I´ll find the quench/cut
connection.
Tim

[mhjerde]

I had a quick peek at the diagram and it looks like grounding the
green wire will quench the flash.

Morten

[Stephen Eaton]

It looks as though the power level is controlled via a voltage applied to
the 2 BLU TTL point, it appear this sets the cut off level of the strobe by
changing the bias of Q4.

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