[OZAPRS] TM-D700A won't turn on

[The Shack by the Beach]

Guys,

Thanks to all that offered help on this, the problem turned out to be a
blown 1.8A surface mount fuse F902.

I didn't have any surface mount fuses so I replaced it with a 1.5A pico
fuse, all is AOK now. I'll be sure to disconnect power
before unplugging the head in future. Weird thing is that I haven't
disconnected the head for a while.

Cheers
Ian vk2him


> Message: 7
> Date: Tue, 6 Apr 2010 21:46:40 +0930
> From: "Tony Hunt" <wavetel at internode.on.net>
> Subject: Re: [OZAPRS] TM-D700A won't turn on (The Shack by the Beach)
> To: <ozaprs at aprs.net.au>
> Cc: vk2him at gmail.com
> Message-ID: <9CCFAE98B03F4A41B7452F52B4115163 at athlonxp>
> Content-Type: text/plain; format=flowed; charset="iso-8859-1";
>        reply-type=original
>
> 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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