Kenwood: Kenwood TS-2000 switches on briefly then off. Unusable.

Vk3otr

Newbie
Joined
Nov 13, 2022
Messages
1
Location
Victoria, Australia
Hi thanks for reading.
Kenwood is no longer supported in Australia and the venerable ts-2000 has dropped in price used.
Trouble is in buying one I may have just bought someone else’s problems.

Basically the radio a TB-2000 without front briefly switches on then off
It’s spasmodic and never stays on for more than 1/2 second.
With covers off near the cmos battery a led briefly flashes on.
The fan turns about two blades.
The push button power button light flashes on amber
And some relays on the pa board clunk.

I though I had found the smoking gun when I found this link

https://www.fixya.com/support/t26370511-kenwood_ts_2000_power_up_fails


But it was in 2016 and the answer does not apply nor solve the problem
Reason?
The tb-2000 works on a pc using the Kenwood program.
If it does not turn on you can’t get a comm port so wasting your time.
I did however connect my remote d700 control head thinking I might see it light up but no way dud that work.

My question to the brains trust is..
With power applied what happens? And how?
On the control board what logic allows you to turn it on and off and why is mine turning itself on and off.
Is there a test to isolate different boards to see if the problem is on the last board, the control board or elsewhere.

I have other junk ts2000 I bought in the deal
Can I interchange any of the boards?
They are faced versions of the ts2000 serial numbers 400-600000
Mine is a tb model faceless model.

Tried so far..
Power check 70 ma lugged in 200 as it clunks on and off so it’s not an overload.
Pushed reset button in front will plugging in power lead no change.
Wiggled every flat lead thinking when the previous owner had pulled out the 1296 module he had disturbed a flat lead like in the link above..
Pulled out cmos battery checked it at 3.2 volts it’s fine.

Nothing burned no smells no smoke pa transistors all have 13.8 volts on collectors there’s volts going to rest of radio.
No unplugged leads no burnt components no nuttin honey!

Help or ewaste!

Thanks for looking.

My email is vk3ot at outlook dot com
All replies answered..
 

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Echo4Thirty

Active Member
Premium Subscriber
Joined
Oct 6, 2021
Messages
664
Have you tried posting this in the repair sections of eham.net and/or QRZ.com? There are some pretty technical folks over there that may have seen this a time or two already.
 
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