[ICOM] IC7000 No Transmit on HF Bands

[Dave Rossbach]

Bruce, thanks for the information and your other email. I do see where 
Icom updated the board, in 2010, which included an additional resister 
and a new adjustment to lower the idle current for the board.

With the additional of the heatsinks and who knows what else, looks like 
that might be what im dealing with then...

Thanks,
Dave







On 3/9/17 11:24 AM, Bruce wrote:
> We had issues with the first 7000's from Japan and found the PA driver was
> going bad/burning up during my time at Icom service
> but all I remember was replacing the driver and adding extra heatsinking
> since it seemed to dissipate enough but couldn't get
> the heat out fast enough. I don't remember if there were any other mods to
> cure that problem, many years have gone by and my
> memory isn't as good as it was.
>
> -----Original Message-----
> From: Icom [mailto:icom-bounces at mailman.qth.net] On Behalf Of Dave Rossbach
> Sent: Thursday, March 09, 2017 9:02 AM
> To: icom at mailman.qth.net
> Subject: Re: [ICOM] IC7000 No Transmit on HF Bands
>
> Bob, thank you for contacting me back. I checked the fuse and it was still
> good. The contacts were a bit tarnished, so I cleaned them up and tried
> again with no success.
>
> I went ahead and ensured the power cable fuses were good and clean as well.
>
> Dave
>
>
>
>
> On 3/8/17 6:38 PM, Robert DiPippo wrote:
>> Check the fuse behind the removable front panel
>>
>> Bob
>>
>>
>> On 03/08/2017 06:29 PM, Dave Rossbach wrote:
>>> Hello.. I was hoping the list might be able to help me out here.  I
>>> have an IC7000 that stopped transmitting on all the HF bands. It
>>> still transmits on VHF and I can hit the local repeaters, but nothing on
> HF.
>>>
>>> After a little research, it seems the final drive (Q504) might be out
>>> of it?
>>>
>>> Has anyone else experienced this problem with the IC7000 and if so
>>> what was wrong with it? If it was the final drive, did you have ICOM fix
> it?
>>>
>>> Thanks in advance!
>>> Dave
>>> ----
>>> 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
>
>