[ICOM] ICOM repair?

[Stephen Budensiek]

Gary,
   Understood.   I have had a couple Icom radio's that had a Lithium
backup battery go bad, and go into a partial short mode, pulling the
voltage suppy down to the CPU.  Radio did all kinds of stupid stuff.
Soon as I pulled the bad battery out, the radio worked OK because the
CPU voltage went back up to normal.  Replaced the Lithium battery so I
would loose the memories everytime the battery was changed.

73's de Stephen, K0SD in TX

**************************************

On Tue, Jan 11, 2011 at 2:45 PM, Gary P. Fiber <gfiber at comcast.net> wrote:
> The Operating parameters in the IC-32AT is not backed up by the internal
> lithium battery, Icom used a mask programmed CPU chip in those days.
> That battery was only used for retaining the memory channels the
> operator programmed.
> I would more likely suspect a voltage regulator, high resistance power
> switch etc gone bad.
>
> As you mentioned the Radios that had the internal battery backed ram
> were the Amateur Radio products
> IC : 745, 751, 751A, 761A, R71A, 271 A/H, 471 A/H, 1271A, and Marine SSB
> Transceivers M700, and M700TY.
> I don't remember any others using that method of operating parameter
> retention.
>
> Gary K8IZ
>
> On 1/11/2011 11:55 AM, Stephen Budensiek wrote:
>> Hello,
>>     I'm thinking the IC-32 has a lithium type backup battery.   I've
>> seen an old one partially short out on some of the other Icom radios,
>> so the battery pack couldn't keep it up either.   The radio would do
>> all kinds of stupid things with it microprocessor running at partial
>> voltage.   There was also a  generation of IC radio's that stored the
>> OS in volitile memory (IC271, IC471, IC1271, one of the Rxxxx
>> receivers maybe R4000?, also I believe the IC751), if the battery and
>> backup battery ran down, the radio was stupid until the OS was
>> reloaded (not easy if you're not a tech, can't load ram or proms - you
>> had to replace the lithium battery, then reload the OS, or send it to
>> Icom for reprogram).
>>
>> 73's de Stephen, K0SD in TX
>>
>> *********************************************
>>
>>
>>
>> On Tue, Jan 11, 2011 at 1:08 PM, C.Whitaker<whitaker at pa.net>  wrote:
>>> de WB2CPN
>>> My IC-32AT went insane yesterday.
>>> It was laying on the table, turned OFF, and during
>>> the night it turned itself ON and ran the battery down.
>>> A new battery makes the radio do all kind of weird
>>> things, jumping from one screen to another.
>>> I'll go down the list and see if anyone will repair it.
>>> I know it's old.  But I like it, and have a few extra
>>> batteries here, so I'm not in a mood to trash can it.
>>> Any one have any better ideas?
>>> The T70A is nice, but I can't handle the fonts ICOM
>>> used on the screen.  A "T" shouldn't look like an "L".
>>> 73  Clete
>>>
>>>
>>>
>>> ----
>>> Your Moderator: Dick Flanagan K7VC: icom-owner at mailman.qth.net
>>> Icom Users Net: Sundays, 1700Z, 14.316 MHz
>>> Icom FAQ: http://www.qsl.net/icom/
>>> To support QSL/QTH.net: http://www.qsl.net/donate.html
>>>
>> ----
>> Your Moderator: Dick Flanagan K7VC: icom-owner at mailman.qth.net
>> Icom Users Net: Sundays, 1700Z, 14.316 MHz
>> Icom FAQ: http://www.qsl.net/icom/
>> To support QSL/QTH.net: http://www.qsl.net/donate.html
>>
>
>
> --
> Gary P. Fiber K8IZ
>
> General Radio Telephone Operators License PG-19-6691,
> with Shipboard Radar Endorsement.
> Washington State Resident.
>
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>
> ----
> Your Moderator: Dick Flanagan K7VC: icom-owner at mailman.qth.net
> Icom Users Net: Sundays, 1700Z, 14.316 MHz
> Icom FAQ: http://www.qsl.net/icom/
> To support QSL/QTH.net: http://www.qsl.net/donate.html
>