[OZAPRS] TM-D700A won't turn on

[Geoff]

Hmm...    I've been removing and replacing the remote head on mine for years
without any issues at all - the radio is powered from a constant 12v
source....   Maybe it's just a matter of time, but I'm not sure how you can
accidently short the pins of an RJ11 connector :)

Geoff  VK2XJG

-----Original Message-----
From: ozaprs-bounces at aprs.net.au [mailto:ozaprs-bounces at aprs.net.au] On
Behalf Of Tony Hunt
Sent: Tuesday, 6 April 2010 10:17 PM
To: ozaprs at aprs.net.au
Cc: vk2him at gmail.com
Subject: Re: [OZAPRS] TM-D700A won't turn on (The Shack by the Beach)

Ian .. Almost certainly an antenna issue .. Theres a shutdown circuit on the

D700 if it transmits into a bad load.. Ive seen it.. Check the connectors 
and the antenna. Thats the Power off problem ..

Now the Wont power on any more problem.. Have a look on the Yahoo group for 
D700 and you will find its a really bad idea to unplug the cable to the head

when the power is still on the radio. That includes when its powered off. If

you want to connect and disconnect the cable to the head then remove the 
power from the radio completely. You have almost certainly blown a fuse or 2

in the Radio..  Inside the radio are some Zero Ohm links that amount to 
fuses. These are on the power feed for the remote head. They are Surface 
mount inside the radio. The good news is that when you replace these the 
radio will work again.

If you repeatedly remove and plug in the remote head cable with the power 
still on the radio then its only a matter of time before you blow those 
fuses. The number of operators that have managed this is incredible. It must

be the biggest design flaw on the D700.

Hope that helps..

Tony  Hunt  VK5AH

----- Original Message ----- 

> Date: Tue, 6 Apr 2010 08:48:24 +1000
> From: The Shack by the Beach <vk2him at gmail.com>
> Subject: [OZAPRS] TM-D700A won't turn on
> To: ozaprs at aprs.net.au
> Message-ID:
> <x2pd0f151801004051548q1e27f25hb1f7f2bfd24ecb97 at mail.gmail.com>
> Content-Type: text/plain; charset="iso-8859-1"
>
> I'm wondering in anyone may have a simple fix for a problem I have on my
> d700? Over the last few weeks it has been powering off at random, however
> now it won't power on no matter what I try.
>
> I have metered out the interlink cable between the head and the radio, all
> seems fine and the fuse on the power lead is AOK. If I 
> disconnect/reconnect
> that cable sometimes the segments in the head display light up 
> momentarily,
> but I still can't turn it on.
>
> Any clues would be gratefully accepted,
> Cheers
>
> Ian vk2him
>

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