IC-92AD Display Goes Blank
Posted by James on August 8, 2011 · 13 Comments
IC-92AD production / design flaw. The display sometimes goes blank when a RF field is present. A non-perfect VSWR to the rubber duck antenna will surely induce this upon itself. (such as transmitting standing next to a metal building).. Initially reports made it appear that its related to VHF digital mode operation, but it will likely show that to do it more often, and in just FM and UHF operations. This problem was first observed by some IC92AD users in Dec 2008. When Icom sales and other reps were asked about it at Dayton (May) 2009, there was still the standard “were not familiar with this problem.. and cannot reproduce it.” Sweeping with another VHF HT in transmit perpendicular seems to be the best way to identify if your IC-92AD is vulnerable to this RF shielding flaw. Tested/reported , affected serial numbers: 0202396 0202481 0202750 series So far I haven’t been able to have the problem crop up with a unit that has the serial numbers; 0203128 0202895 0202883 0203001
This problem of this Radio can Survive,,There r some modification Required in this Radio..New productions alredy made this Modification…Radio Engineer can do this modification..anybody required this contact me
hmmm..interesting.
I guess this isn’t really the situation you’d find yourself in to often; transmitting directly into the face of your 92AD. But a little disconcerting nonetheless.
Perhaps you should ask Harry Potter to borow HIS wand instead!
thats a known fault on the IC92.. I had it on mine, when i spoke to Icom at a local radio rally, they confirmed it.. Send it back to Icom who will do a free modification to it under warranty.
Ever stop to think that when you use the radio as your supposed to, there is 5 watts less than 1/2 inch from the display? (It’s a true dual bander so at least one receiver is active when you are transmitting.) How is that any different than another radio transmitting in close proximity?? Anyway I hear what you are saying…. just don’t make it sound like an excuse for a shitty design issue.
The heck with the display just think what your doing to the front end. Keep doing that and it will be deaf as a post and no display to boot.
N4LNE
I just bought mine yesterday, and the dam thing did to me. I found it is rf interference caused on the 2 m side as u tx on 2 m and wave your hand in front it will cause the display processor to drop the display signal. 440 does not seem to cause a problem.
Well, that’s just one of the damnedest things I’ve seen.
My Friend have this problem also.
my question is does the radio do this with its own 2m TX? i imagine there is some type of preventative circuitry that keeps its own TX from doing this, and that because the transmission is coming from an “outside” source. ive never had a hiccup with a radio like this ever, a general rule ive always followed is radios(especiallt on vhf) will **** with electronics at a close range, i guess a radio is no safer lol. im no expert though haha. i always stuck with single bander handhelds myself.
A radio that isn’t shielded is a major flaw.. Considering during normal use there is up to 5 watt less than 1 inch from the LCD anyway. Some of the newer IC-92AD’s have a greener tint to the LCD, which I assume offers better shielding.
That doesn’t surprise me with the TV.
try shielding the LCD with piece of aluminium foil haha
i actually broke a 32 inch crt HDTV with my VX-170/stock antenna on 2 watts
bye bye $1200
haha
I wouldnt recommend keeping doing this though.