From:    "Dr. Howard S. White" <drpaper@m...>
Date:  Tue Jul 20, 2004  2:07 am
Subject:  Re: [IC-2720] Re: Icom's take on 2720's documented problems

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From: Kevin Bozich
Sent: Tuesday, April 20, 2004 8:20 AM


Hi Pat, the earlier units needed R102 changed from a 100 ohm to a 39 ohm & a
thermal pad placed under the board beneath D36 (main board). This is being
implemented from manufacturing now.
The "unofficial fix" done here in service is to resolder all the TX/RX
diodes with silver solder and add a 16V zener diode to the driver transistor
(across C93).
A bulletin from home company states their fix is improved soldering
practices on the driver transistor. This is being implemented from s/n
0505701 on.

Kevin B
ICOM America, Inc.

----- Original Message -----
From: "frostbitnome" <perkins@g...>
To: <IC-2720@yahoogroups.com>
Sent: Monday, July 19, 2004 11:26 PM
Subject: [IC-2720] Re: Icom's take on 2720's documented problems


> Heck, I'm sorry. The post is over at www.mods.dk
> Go to this addy, get in the Icom section (models beginning with "I"),
> click on the IC-2720 link, and you'll find "2720 problem parts" at
> the top of the list. There it is for you to digest..
> Glad to hear your rigs are performing well.
>
> 73
> KL3NP
>
> --- In IC-2720@yahoogroups.com, S L <kb1jdn@y...> wrote:
>
> > Good Morning. I went to QRZ Mods section but couldn't find the
> posting that you refer to. Could I have better directions? hihi!! We
> have 2 2720's. One in the kitchen...face plate and speaker only...the
> rest is in the basement; and one in my truck. Haven't had any
> problems with either one, knock on wood, but would like to keep up on
> the repairs, etc of others--just in case!! 73........KB1JDN
> >
> > frostbitnome <perkins@g...> wrote:
> > Hi all,
> > Name is Nate, and I am in Nome, Alaska. I have a 2720 that I bought
> > new in Dec. of 2002. To date, I have had no problems with mine.
> > Unfortunately, many other owners do not share the same fate. Case
> in
> > point: blown finals.
> >
> > My radio is long out of warranty, so I wrote Icom. My question was
> > given the history of the well documented failures of the 2720's (at
> > least the older rigs), would Icom offer to upgrade my radio to
> > current production specs at no cost to me?
> >
> > Yup. Icom told me that they would upgrade ANY Icom radio to present
> > production specs (re: making changes to older rigs that Icom has
> > found to remedy problematic areas). All I need do is send it in to
> > their Bellvue plant and they would take care of it.
> >
> > Now, I think thats fair. This winter I will do just that, when I
> can
> > take the rig out of mobile service and part with it for the time
> > needed for repairs.
> >
> > Thought this might be of some interest to some of you. Over on
> > eham.net reviews, a whole lot of owners are pretty dismayed with
> > their rigs going down. On qrz.com's Mods section, a fella has
> posted
> > a response from one of Icom's techs explaining just what parts need
> > to be changed, and other procedures needed, as well as the serial
> > number at which the factory began the upgrades. My radio fell below
> > that, hence my letter to them asking for assistance.
> >
> > Given Icoms admittence to the early 2720's problems, and the offer
> to
> > repair to current specs for out of warranty radios, and that the
> > current run of 2720's appear to be relatively promblem free, I plan
> > to buy another one for my second truck.
> >
> > Nate