Pages: [1]   Go Down

Author Topic: Kenwood TS-690S encoder knob  (Read 89 times)

KI5HEH

  • Member
  • Posts: 2
    • HomeURL
Kenwood TS-690S encoder knob
« on: November 27, 2019, 07:28:33 AM »

First off, I just got my technicians license two weeks ago, so I don't have a lot of experience with this stuff. That being said, I got an old TS-690S from a friend who said everything worked except the VFO (encoder) knob and a couple other knob were missing. I've located the manual for it and found the old part numbers and replacement numbers. I don't understand what I am looking at in the manual as far as how to test and adjust it though. What I would like to know is if anyone knows where the problem may lie. I purchased a working pull replacement encoder (and the other knobs that were missing) from Ebay and thought that might be a good first step. Any experienced help would be appreciated.
Logged

N2ZD

  • Posts: 429
    • HomeURL
Re: Kenwood TS-690S encoder knob
« Reply #1 on: December 12, 2019, 06:42:18 PM »


The knobs are a no brained, push them on properly and that’s that! Lol!
The original encoder may just need to be cleaned. I don’t recall many going bad. The 690 is just a TS-450 with 6m in it from what i recall. Anyway, a Kenwood usually has a top and bottom cover, remove those, then there is 4 or so more Phillips screws which can be loosened and the top two of them removed so the face tilts down.  The vfo knob can be removed to expose the front and most bits can be removed from the back. Your best bet is to find a local “Elmer” to help you out so an hour job doesn’t become an eternal one.

Regards Richy N2ZD
Logged

KI5HEH

  • Member
  • Posts: 2
    • HomeURL
Re: Kenwood TS-690S encoder knob
« Reply #2 on: December 12, 2019, 11:07:44 PM »

I received the encoder and yes it is a pretty easy job to replace it. Just a bunch of screws to pull out for the top, bottom and front covers, fold the face down, pull the front circuit board and the knob and replace. I had read on a few posts that the IC may be the issue, but when I get it back together, I'll know if it was the encoder itself or not. Unfortunately it is a sealed unit so I couldn't clean the old one. Now I'm trying to find a trim pot for the mic gain. The mic gain was bent and wouldn't turn easily. I tried to straighten it a bit and the shaft snapped right off with almost no pressure. That's pot metal for you. Once I find a replacement and solder it onto the board and find a power cable, I can start looking into a power supply and antenna and all the other fun stuff to use it. Thanks for the reply.
Logged
Pages: [1]   Go Up