Hi to All-- I had problem that main tuning encoder would not change the
frequency on foctory VI+. TT tech advised to interchange rit and main
tuning cables (55 & 56 or 54& 55 if I remember correctly) and let rit
encoder control main tuning to check. I did & it did. I then ordered a
new main encoder and all is well
73, Ariel, k4aal
Steve Baron - KB3MM wrote:
> OK. Now I know what frequency lock-up means <gr>.
> You should have pulses coming from both pahse lines. Wonder if you lost the
> supply voltage or ground to the encoder. The only other possibility for no
> pulses would be a bad encoder I guess.
> -----Original Message-----
> From: N1EU <firstname.lastname@example.org>
> To: email@example.com <firstname.lastname@example.org>
> Date: October 09, 1999 1:59 PM
> Subject: Re: [TenTec] Frequency Lockup Blues
> >To answer the questions posed by Phil & Steve, never
> >happened before and PS is a nice TT 961.
> >All of the other functions seem to be working except
> >main tuning. User options can be set and retained,
> >etc. and even RIT functions so she's not brain dead
> >for sure.
> >I looked at some of the digital lines, and would
> >really appreciate some help with diagnosis. Here's
> >what I've seen on the logic board - I started looking
> >at the tuning encoder lines. RIT ("OFFSET") pulses
> >are clearly seen coming into U19 pins 1/2/5/6 and U20
> >21/22. However, no pulses at all are seen from the
> >Main Tuning encoder coming into U18 8/9 or U20 19/20.
> >Am I correct in assuming pulses should be seen there?
> >I would be extrememly grateful for any hints on
> >further troubleshooting.
> >Tnx & 73,
> >Barry N1EU
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