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Author Topic: Repairs needed on Kenwood TS-140S  (Read 2622 times)
N2DUZ
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Posts: 16




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« on: March 02, 2013, 01:30:44 PM »

I know it is old, but it has treated me well, and now need some work.  This radio has band witches that you press on and go up one band, press the other and you go down one band.  One of the buttons has stopped working and I would like to get it fixed.

Anyone know a GOOD DEPENDABLE place I could get it fixed?

Thank You
Harry J.

N2DUZ
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W9GB
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Posts: 2616




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« Reply #1 on: March 02, 2013, 02:08:28 PM »

Clif Holland, KA5IPF
(Amateur Radio Service Center)
322 VZ County Rd 2714
Mabank, TX 75147
214-850-0973
Monday-Friday: 10AM-5PM CST
http://www.avvid.com/

eHam.net Reviews (176 reviews)
http://www.eham.net/reviews/detail/1142
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N4NYY
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Posts: 4747




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« Reply #2 on: March 02, 2013, 07:24:26 PM »

I second Clif, unless he does not repair old rigs. Do you try a deoxit?
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VE7DQ
Member

Posts: 175




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« Reply #3 on: March 02, 2013, 08:46:19 PM »

Although it's tempting, one is advised not to indicriminately spray contact cleaner around the Display Unit keyboard assembly of a TS-140 in the hope of a quick fix.  It's unlikely that the stuff will find its way into the switch without completely disassembling the front panel, and I don't know if the up and down momentary switches are sealed or not. 

Given the age of the TS-140, it is unlikely that the switch is still available, but luck may prevail.  Its Kenwood part number is S50-1412-05.  Search away.

73
Tom
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W9GB
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Posts: 2616




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« Reply #4 on: March 03, 2013, 06:45:01 AM »

The Kenwood part, that Tom, VE7DQ referenced, is still IN STOCK at Kenwood Parts.
This part is used in other Kenwood radios.

Qty.   Part Number   Description       Alternate Part.                    Price
 1.    S50-1412-05    SENSITIVE SW (SWR) R-2000 TS-711A TS-811A     $2.71
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VE7DQ
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Posts: 175




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« Reply #5 on: March 03, 2013, 04:53:11 PM »

Great!  Many switches aren't.
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KA5IPF
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Posts: 993


WWW

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« Reply #6 on: March 03, 2013, 08:03:04 PM »

5 in stock here, and it's a sealed switch.

Clif
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K9YLI
Member

Posts: 859




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« Reply #7 on: March 04, 2013, 07:18:50 AM »

For all who read this.. there are  all kinds and sizes of   small  through hole  mount  switches
out there.   Calculators,, printers, radios,  tv controls,  from  pencil  eraser size to half that..
I disassemble  many  things to save  usefull  parts.

Also  places like   allelectroincs and   marlin p jones  has the odd ball stuff.
plenty  of  useable substitutes  for   ""obsolete"  parts.

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WA0ZZG
Member

Posts: 157




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« Reply #8 on: March 04, 2013, 08:38:06 AM »

Harry;
The '140 is a standard and an example of a radio that just works well.  Recommend that it is worth repairing.  Suggest a couple other issues be resolved while you have it in a shop. The firmware chip, on the CPU board, is in a socket that likes to become intermittent.  Suggest you have the socket cleaned.  The PA components, mounted to the heat sink, like to have their mounting hardware work loose from constant heating and cooling. Suggest they be tightened.  Same for the audio output chip. There's a small diode stuck to one of the PA outputs with a glob of heatsink compound. Replace the compound if it's dried out. This diode keeps the Pa's from going into thermal runaway and frying themselves.
Most of these radios have paint worn off the front panel in places. I consider it a sign of experience.
Dave  WA0ZZG
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