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[TenTec] Frequency Lockup Blues

To: <tentec@contesting.com>
Subject: [TenTec] Frequency Lockup Blues
From: SteveBaron@starlinx.com (Steve Baron - KB3MM)
Date: Sat, 9 Oct 1999 13:13:23 +0100
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 <n1eu@yahoo.com>
To: tentec@contesting.com <tentec@contesting.com>
To: <tentec@contesting.com>
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
>Do You Yahoo!?
>Bid and sell for free at http://auctions.yahoo.com
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