[Yaesu] Perplexing Problem...

[KB0NLY]

Ok, thanks!  Now i see the battery.  No the reset pad is not shorted and the 
radio retains its memory if you turn the radio off with its power switch 
before you disconnect power.  If you disconnect power with the radio on it 
looses it's memories.

Also, i see that the battery is just diode isolated from the keep alive line 
to the processor, so its not a switching problem or otherwise its 
instantaneous backup with a couple diodes.

73,

Scott KB0NLY


----- Original Message ----- 
From: "GGLL" <nagato at arnet.com.ar>
To: "KB0NLY" <kb0nly at mchsi.com>
Sent: Tuesday, October 13, 2009 4:37 PM
Subject: Re: [Yaesu] Perplexing Problem...


> Look the Control unit schematic, at the lower right corner of 
> microprocessor and just below the jumper pads JP2001 to JP2006. Page 43 of 
> "soft" user manual.
> Check in the board if the reset pad is shortcircuited (must be open)
>
> Regards
> Guillermo - LU8EYW.
>
> KB0NLY escribió:
>> I can't find the backup battery anywhere on the control unit schematic 
>> for the FT-2400H, anyone know if its on the schematic or do I need some 
>> supplement from the service manual for this?
>>
>> 73,
>>
>> Scott ______________________________________________________________
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