[SixClub] Kenwood TS-60 Frequency readout issues

[Roger (K8RI)]

Bill Cotter wrote:
> Sounds like a connector issue, in particular in the LCD 
>   
Connector? Yes, but LCD?  I doubt it.  I see the possibility of two 
distinctively different problems.  There is the slow frequency change 
that works while fast does not, and the second is the off, or out of 
range frequency which is unlikely to be related to the display or 
frequency control knob or encoding.

   One possibility:  The LCD connectors which are usually a conductive 
strip tend to drop segments on all that I've had go bad or the ones I've 
seen go bad.  I recommend that any one without the skills, never take 
one of these apart.  More likely it's one of the ribbon cables that use 
the tiny, plastic, clamp connector, or a connection to the board.  
Another prime candidate is the vfo knob encoder.  Make sure the 
connections to it are secure. Typically the errors I see from these is 
similar to the problem described.  A weak signal, from the encoder 
caused by either dirt in the encoder or low voltage will do just what is 
described.  I don't know if this rig uses an optical or magnetic 
encoder, but the problems are similar.  In the optical encoder dirt/dust 
or low voltage causes a low output.  Spin the knob and you'll get no 
output, but turn it slowly and it'll sometimes work BUT The off 
frequency range indicates a problem some where else, such as the phase 
locked loop.

Were it me (and it's not) I'd check all the connections between the 
display and boards as well as between the control and board. Due to the 
out of range frequency of operation, I'd reseat all boards, connectors, 
and virtually anything in a socket. (and clean out any dust) . Doing 
this does not come without some risk.

Good Luck,

Roger (K8RI)
> 73 Bill N4LG
>
>
> At 09:32 PM 3/17/2009, you wrote:
>   
>> My TS-60 had not been used for a few months,just riding along in 
>> the rack mounted in my truck. I moved it into the shack last week 
>> to get ready for summer band-openings and when I powered it up 
>> there was no freq readout,either from memory or VFO. All the other 
>> functions are visible and seem to operate. If I very slowly rotate 
>> the VFO the readout will flash 51.000 for just a second and as I 
>> continue to dial I get 49.999. If I continue to dial slowly down 
>> the band I can tune all the way to 40.000. The radio will hold any 
>> frequency in that range when I power down and back up later so the 
>> memory battery shouldn't be an issue. I did use a dummy load and 
>> check output at low power. Yes it shows it is transmitting when 
>> displaying the 40.00-49.999 range.
>>
>> Anyone have any ideas??
>> Larry
>> KG4ZAR
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