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

[Dick Flanagan]

I recently had similar tuning symptoms with my primary HF radio and it 
turned out to be a defective encoder.

Your mileage may vary.

73, Dick

At 08:22 AM 5/11/2005, Frost, Charles 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/
--
Dick Flanagan K7VC NV SM
E-mail: k7vc at arrl.org