[Icom] IC-756

[Tony Hwang]

Hi,
That IR opto chopper has to be in alignment because it uses two pulses.
You mention spindle has a play which does not sound good. If you have a
'scope, it'll be much easier to fix it. If compressed air does not clean
the emitter/detector module, you wet a lint free cotton fabric soaked
in freon and rub them to clean off dirt build up. 
GL es 73,
Tony, VE6CGX

Sean Nolan wrote:
> 
> I am about to replace the display unit in my IC-756 (blue lines problem) and
> the shaft encoder (display freezing).  I have had the front panel etc off
> previously trying to cure both problems with the compressed air can.  No joy
> unfortunately. I would be glad of hints of things to watch for particularly
> in doing this job from anyone who has the experience of treading the same
> path.  There is quite a bit of play on the spindle of the shaft encoder
> which has to carry the weight of the tuning knob hanging on the end.  If I
> lift the knob slightly the encoder tunes normally.  It is a pity that Icom
> didn't spend a dollar on a panel bush to take the weight.  I don't think
> there is room to add one the way it's designed.  A lighter tuning knob would
> probably help.  Reply off list if you feel that all this is old hat.
> Thanks.
> 
> Sean EI7CD
> 
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