[ICOM] IC-765 question

[Marc & Tricia Niebergall]

Well, I changed the electrolytics which were 25 years old, and that appears
to have solved the problem. In case it doesn't I have ordered on of the few
remaining photo interrupters (ic-1).  So far it is not required.  Will keep
everyone posted.

Marc-k7wxk
On Apr 25, 2015 1:07 PM, "Gary Fiber" <gfiber at comcast.net> wrote:

> We always used Icom parts. You might check with Scott Malcom of Malcom
> Technical Support. He does a lot of service on the older Icom radios. I am
> not sure Icom still has parts, but I would give them a call. I think the
> N-110 was Neon type of opto isolator or similar circuit, it is in the power
> supply start up circuit. Scott may have another source for them, if Icom
> does not have the actual part. He may also some idea as to the slow start
> up of the power supply. I don't have Scott's number or email handy but a
> Google search or look on eham.net will turn up his information.
>
> Gary P. Fiber K8IZ
>
>
>
> > On Apr 25, 2015, at 9:32 AM, Marc & Tricia Niebergall <mtniebs at gmail.com>
> wrote:
> >
> > Gary,
> >
> > IC-1 is listed as a photo interrupter n110.  In case that is the guilty
> > component, is there any way I could get an equivalent part from Mouser? I
> > don't know much about solid state electronics, so this is a bit confusing
> > to me. R-5 checked out exactly at 3 ohms, so that appears to be good. I
> > have made the adjustments listed for the 13.8 voltage (R-14), but the
> R-19
> > adjustment does nothing (at least on my digital voltmeter).  I made the
> > adjustments with the power supply connected to the radio instead of
> > isolated with the 300w rheostat connected.  Don't know if that has any
> > bearing on the testing or not.
> >
> > Marc
> >
> >> On Sat, Apr 25, 2015 at 8:31 AM, Gary Fiber <gfiber at comcast.net> wrote:
> >>
> >> Look here http://www.ab4oj.com/icom/ps35/main.html
> >>
> >> Grab the PS-35 user manual  PDF. IC1 and R5 used to be problematic in
> those
> >> supplies too. R5 might have changed value, it is a current limiting
> >> resistor. IC1 would not fire off all the time as I remember. If you look
> >> through this manual and see the voltage change on the PCB layout, that
> is
> >> my
> >> hand writing hahaha. Funny to me to see my hand writing all over the
> net.
> >>
> >> Others here are more familiar with this supply than I am anymore, left
> Icom
> >> in 2001 so daily tech support is history.  When I was there 80 telephone
> >> support calls a day on all of their products combined was normal. My ear
> >> was
> >> tired at the days end ;)
> >>
> >> Gary K8IZ
> >>
> >>
> >>
> >>
> >> -----Original Message-----
> >> From: Icom [mailto:icom-bounces at mailman.qth.net] On Behalf Of Marc &
> >> Tricia
> >> Niebergall
> ----
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