Ok Guys just had the report back from the local independent PMR workshop and they have confirmed the 5700D is deaf on VHF + UHF . HF is fine so I will surmit a copy of the report with the radio when its returned to the importer who I am sure will send a copy to AOR . But due to all the problems and trips to Japans and uk workshop this radio has had I think the only way forward is to exchange the radio or refund the money as its very clear this problem with the radio being deaf is intermittent which makes it a very hard fault to trace when the radio has to be sent to Japan I just hate to think of the time and cost anyway we shall wait and see .
Thanks for the update, it's too bad all the problems you've experienced, I bet you're delighted to have your diagnosis confirmed though.
This particular receiver is obviously a lemon.
I'd aggressively pursue the "demand new radio or refund my money" track.
I know there are consumer protection organizations in the UK, you might want to consult with someone there for advice on how best to proceed.
Maybe also speak to your credit card issuer if you've used one to purchase the radio, they have policies to protect their users from being ripped off with faulty merchandise that doesn't perform to spec. I've made use of that option before with good results.
Maybe also do some research re any consumer protection statutes that are current in the UK.
Good luck, I hope the UK importer/AOR do the right thing here, I'd be seriously ticked off spending all that cash and getting treated like this.