Icom IC-400Pro Query

Submitted: Sunday, Jul 17, 2011 at 17:25
ThreadID: 87628 Views:5987 Replies:6 FollowUps:2
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Hi folks, don't know if you can help.
I'm a grey nomad touring Oz with an IC-400pro UHF radio on board. This is a reasonably complicated beast but I'm generally quite happy with it now that I understand it better Have obtained a cloning cable and done some updates and am reasonably cluey; but have 2 problems....
1. ICOM powers up when 4WD switched to IGN. Occasionally when I power up the unit receives OK but won't transmit. Pushing the PTT switch causes it to transmit a carrier but no voice modulation, like the mike part isn't connected. I can resolve this by unplugging the PTT/Mike from the front panel and plugging in again. May have to do this 2 or 3 times, but suddenly all OK again. Then it works for a few days and the problem recurs. Most annoying as if this fault is on we think we are transmitting but nothing going out. I presume ICOM is looking to see whether a mike plugged in or a clone cable and is getting confused. Waggling the mike lead/plug has no effect, like it's not just a loose connection.
2. Very occasionally when on Ch40 the unit will ring like a phone and display CALL 1 on the screen. Changing channel up and back returns it to normal. Is this something to do with Selcall ? Can't find any ref to it in the Instruction Manual.
Does anyone have experience or advice on either of these two?
Any help on these much appreciated. Thanks, David Hogg



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