The "N"'s (OM-1n and OM-2n) have a diode in the sync circuit so that the
hot shoe is always X-sync even if the X-FP switch on the PC socket is
accidentally set on "FP".
The problem is that this polarizes the sync, so that current from the
flash's PC cord has to flow in the proper direction through the camera.
Some "pocket" flashes (mostly off-brands and a few Sunpack models) are
wired "backwards" and won't fire reliably.
But the big problem is the studio units, especially the ones with the
"AC"-type plug for the PC cord that can be plugged in either direction,
or with cheap-o or home-made PC cord extensions that are
cross-connected. On the studio units, with the cord plugged in one way
they work fine, but the other way they're unreliable. If that happens,
try reversing the PC plug -- that may "fix" things.
Jim Couch wrote:
>
> Are you saying that a properly functioning OM-1/2 will not fire studio flash?
> Interesting if true. My daughter's OM-2 would not fire studio flash this week
> and
> I assumed it was a problem with the camera that needed repair.
>
> Jim Couch
>
> clintonr@xxxxxxxxxxxxxxxx wrote:
>
> > But the only "routine" modifications we occasionally perform are to disable
> > the "FP" sync on OM-1/2's, and/or bypass the diode in the sync circuit of
> > the
> > OM-1n/2n's so they'll fire studio flashes -- that and modifying OM-1/1n's so
> > the meters work properly w/alkaline and silver oxide batteries.
> >
>
> < This message was delivered via the Olympus Mailing List >
> < For questions, mailto:owner-olympus@xxxxxxxxxxxxxxx >
> < Web Page: http://Zuiko.sls.bc.ca/swright/olympuslist.html >
< This message was delivered via the Olympus Mailing List >
< For questions, mailto:owner-olympus@xxxxxxxxxxxxxxx >
< Web Page: http://Zuiko.sls.bc.ca/swright/olympuslist.html >
|