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

[David Nagel]

The quickest way to check the led for the encoder is to use an IR capable video camera such as a Sony. When you set the camera to IR it will see any light emited from  the led. If you see  the light then you can get the scope out.
 
Dave  WD9BDZ


"Frost, Charles" <Charles.Frost at aliefisd.net> wrote:
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
----
Your Moderator: Dick Flanagan K7VC, icom-owner at mailman.qth.net Icom Users
Net: Sundays, 1700Z, 14.316 MHz Icom FAQ: http://www.qsl.net/icom/
----
Your Moderator: Dick Flanagan K7VC, icom-owner at mailman.qth.net
Icom Users Net: Sundays, 1700Z, 14.316 MHz
Icom FAQ: http://www.qsl.net/icom/