[ICOM] 75 PRO III Smoked!

[Stephen Budensiek]

Let me try this again.   This is not the site I originally downloaded
the manual from, but I found a manual on the site labeled "IC-756Pro3
Service Manual REVISED June 2007.zip".  It looks like it may be the
same manual, give it a try.   I downloaded mine from a US site, but I
was in a number of them to find a good Service manual.   Several sites
had them, but they were missing the last 2 or 3 sections of the
manual, took me awhile to find a complete one.

73's de Stephen, K0SD

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

On Tue, Feb 21, 2012 at 8:08 AM, Jim n4uoz <n4uoz at bellsouth.net> wrote:
> here is the site for service manuals   http://www.mods.dk/
>
> --
> Jim Sherwood,  N4UOZ
> n4uoz at arrl.net
>
>
>
>
> On 2/21/2012 4:30 AM, Stephen Budensiek wrote:
>> Jay,
>>     Don't know if this will be of any interest to you, but I found a
>> IC-756ProiiiServiceManual2007.pdf somewhere on the internet, don't
>> remember where.   Just checked it, it shows the drivers as being
>> RD15HVF-1 FETs.   It a full service manual, with parts, layouts,
>> voltages, it's a 29 mb file in a zip, that you can unzip into a pdf
>> file.   I was looking at a Pro3, wanted to see what I could find, and
>> found this, along with a earlier Proiii service manual.   It may have
>> been the German site that has lot of Icom and other stuff on it, but
>> can't remember for sure.   It has a very long file name, something
>> like "IC-756PRO3_Service_manual_REVISED_June_2007 at magfmegfld.zip"  on
>> the download site.   Wouldn't mind sending it to you, but not sure how
>> I could upload a 29 meg file via my email, think Gmail limits me to
>> something like 8 meg.   Let me know if I can help you.
>>
>> 73's de Stephen, K0SD in So FL
>>
>> **************************************
>>
>> On Mon, Feb 20, 2012 at 7:21 PM,<jkolin at optonline.net>  wrote:
>>> I have a late production unit. It has the newer PA Board using MOSFETS as drivers and finals.
>>>
>>> 3 Days ago I was checking SWR on a new ant. 2/1. Key down w/100W for about 10 seconds. After a few SWR measurements power dropped to 5 W max. Then I could not go into transmit mode. After about a minute in receive mode, smoke billowed out of the rear panel from the PA compartment.
>>>
>>> Removed top covers and found 3 burned SMD resistors. R38, R39&  R40.  4.7 ohm. All 3 are in parallel.
>>>
>>> Anyone have problems with this newer PA board? I have not been able to find parts layout drawing that applies to this new PA board.
>>>
>>> Thanks for all your thoughts.
>>>
>>> Jay....
>>> ----
>>> 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
>>
>>
>
>
>
> ----
> 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