[ICOM] Re: Icom 260 With Tuning Problem (Michael P. Olbrisch)

[Frost, Charles]

I will get out mu scope and give it a try. 

-----Original Message-----
From: mikea [mailto:mikea at mikea.ath.cx] 
Sent: Wednesday, May 11, 2005 9:05 AM
To: ICOM Reflector
Subject: Re: [ICOM] Re: Icom 260 With Tuning Problem (Michael P. Olbrisch)

Well, then one possibility is that the encoder (light source andor
photosensor) has failed. I suppose you could scope the sensor line as you
rotate the knob; you should see some dozens (or more) of pulses per turn of
the knob. If you _do_ see good output from the sensor, then it's the logic
downstream of the sensor, which probably isn't going to be a lot of fun to
troubleshoot.

If you don't see good output, then you only need to find a working
source/sensor assembly. 

Good luck.

On Wed, May 11, 2005 at 09:59:49AM -0500, Frost, Charles wrote:
> I have had it open and it is clean on the inside. 
> 
> -----Original Message-----
> From: Ken [mailto:wn2sqc at yahoo.com]
> Sent: Wednesday, May 11, 2005 7:27 AM
> To: icom at mailman.qth.net
> Subject: [ICOM] Re: Icom 260 With Tuning Problem (Michael P. Olbrisch)
> 
> Hi Michael, I downloaded the radios block diagram from MODS.DK and it 
> shows that the tuning uses a chopper disk.
> Based on the radios age I would first open it up and check for a load 
> of dust blocking the chopper disk. Ken

--
Mike Andrews, W5EGO
mikea at mikea.ath.cx
Tired old sysadmin
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