[ICOM] IC 746 powers up in transmit

[Larry Young]

Lee; You may want to ask for help from the 746 reflector.
Larry K4LXV

--- On Sun, 7/12/09, Lee Scott - AA1YN <yg1-aa1yn at aa1yn.com> wrote:

From: Lee Scott - AA1YN <yg1-aa1yn at aa1yn.com>
Subject: [ICOM] IC 746 powers up in transmit
To: icom at mailman.qth.net
Date: Sunday, July 12, 2009, 10:06 AM

My IC 746 is in continuous transmit mode and have been trying to debug the 
problem. The "SEND" signal appears to be normal - low and not shorted - but 
I am trying to trace the "SENI" signal to it's source.  The SENI signal is 
the input to the main cpu which forces it into transmit and I believe the 
source of this signal has failed. Unfortunately the PDF version of the 
service manual is to say the least useless as you can not read any small 
component ids so tracing the physical layout of the board is next to 
impossible.

Any help would be appreciated.

Lee Scott - AA1YN http://www.aa1yn.com
Home of the VHF & Up Register http://www.aa1yn.com/vhf
Home of the VHF Talk logger http://vhftalk.aa1yn.com
Hooksett, NH
FN43gc52

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