[Yaesu] Still a weird problem..

[Ivan Silva]

Scott

It is a problem very commom on kenwood radios. You can read something about 
it if you looking for kenwood bulletins...
I never seen it on Yaesu radios but.. now you have one..
Usually it is problem on RESET circuit.  When you turn the radio off the CPU 
goes to sleeping mode and nothing happen when you turn it on again.. but 
when you just take the DC power off the CPU doesnt go to sleep before  the 
radio goes OFF
I believe you have some  "dry capacitor" on its RESET circuit. Just  follow 
the pin "3" of the CPU  and verify the capacitors you have there  C2035, 
C2041 etc.. Maybe they are giving  erratic function and producing a false 
RESET pulse...
Hope it help and  I´ll be waiting for good notices from you..
73

  Ivan - PY1YB
www.py1yb.com
----- Original Message ----- 
From: "KB0NLY" <kb0nly at mchsi.com>
To: "Yaesu Reflector" <yaesu at mailman.qth.net>
Sent: Monday, November 23, 2009 7:05 PM
Subject: [Yaesu] Still a weird problem..


Ok, as I posted about a while back I still have an old FT-2400H here driving 
me nuts...

I replaced the memory battery twice just to be sure, I even checked to make 
sure the keep alive power is at the processor, I can't find the problem. 
Here is what it does...

Program all the memories, turn the radio off, unplug it from power, and let 
it sit for weeks... Works fine and holds its memories.

Program all the memories, disconnect the radio from power, reconnect it to 
power...  All the memories are gone along with all the settings made.

I wanted to control the radio's power with a relay for APRS use.  I can't 
get it to hold memories or settings though if the power is disconnected 
while the radio is on.  And the power switch function on these is such that 
I can't replace it with a relay either, soft on and off pushbutton.

Any ideas before I get rid of it??

73,

Scott

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