[Icom] rotary encoder

[Jens Schmidt]

Hi Srikanth,

some of the rotary encoders fail by loosing one of
the infrared devices. Difficult to test because they
seem to be sensitive to visible light as well.
I have seen successful repair by using the devices
from discarded computer mice.
Good luck -

73 Jens    ZL2TJT

AMSAT-NZ #218
RE78nv

Srikanth Bhat wrote:

> Hello Group,
>
> I have two old Ic-735s. Both give me excelent service.
> However one of them has developed a slight problem.
> The rotary encoder unit (used for frequency tuning)
> seems to misbehave. It either simply refuses to
> respond to frequency change controls or changes in
> opposite direction. (freq increases for
> counterclockwise or vice versa). Band changes, MHz
> changes etc are never possible without using the UP/DN
> keys on microphine simultaneously while using the
> tuning knob. I tried interchancing the faulty rotary
> encoding unit from one 735 into the other, and the
> problem got shifted in to the other 735, and this one
> was working OK now with the changed unit. So it
> apparently seems something is gone wrong with the
> rotary encoder unit. Internally, it seems to appear
> fine (no bends, dust etc in the stainless steel
> optical slot plate)
>
> Any tips to set this right? Also if I have to get a
> new one, where can i get it from?
>
> Thanks very much for reading
> 73
> Sri, vu2sbj
>
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