[ICOM] 756ProII Power off/Reset on XMIT

[ma.locksmith at juno.com]

Well, you might have been on the right track, but you took the spur
instead of the main line...

Take a look at the voltage at the INSIDE of the power connector.  These
pins often lose their spring and then make poor contact.  The additional
current required during transmit will lower the voltage enough so that
the set just dies.  Might also find the same problem across the fuse(s).

Ed
K1ZOK

On Sun, 27 Jun 2004 07:16:12 -0400 "Frank N. Haas"
<headrat at rats-computers.com> writes:
> 
> Riddle me this, IcomMan!
> 
> My 1.5 year old 756ProII has developed a new problem. It's about to 
> make 
> its second trip to ICOM for service.
> 
> When I attempt to transmit, even with RF Power turned down to 5 
> watts, or 
> if I press the TUNER button, in either CW, RTTY or SSB modes, the 
> radio 
> will instantly shut off and turn itself back on. Any attempt to 
> transmit, 
> either via the VOX, Transmit button or CW break-in operation will 
> cause the 
> radio to instantly shut down and restart. The display blinks off and 
> the 
> radio behaves as if I just turned it back on.
> 
> A MASTER CPU RESET does not resolve the issue. Icom Tech Support 
> asked me 
> to try another power supply. I swapped out my PS-125 for another I 
> have 
> here and the symptoms are the same. They could offer no other 
> solution 
> other than to send it in for service.
> 
> It would appear that something shorted hard. The radio is now .5 
> years out 
> of warranty. The first trip to Icom was to repair an intermittent 
> solder 
> joint at L114 in the bandscope circuitry 6 months ago. Now this. I 
> guess 
> I'm going to have to buy a second 756ProII for use while one is in 
> the shop 
> :-(
> 
> I can't ship it until Monday. Anyone care to offer another 
> troubleshooting 
> idea before the unit gets boxed for shipping?
> 
> 73,
> 
> Frank N. Haas KB4T
> Florida 
> 
> 
> ----
> Your Moderator: Dick Flanagan K7VC, icom-owner at mailman.qth.net
> Icom Users Net: Sundays, 1700Z, 14.316 MHz
> Icom FAQ: http://www.qsl.net/icom/
> 
> 

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