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My internal keyer isn't working

 

Hi guys,
I'm restoring an old FT-847 damaged by lightning a lot of years ago and had been lying in the schack collecting dust, according to the previous owner.
After replacing the main CPU on the AF/CNTRL board the radio woke up from it's Cinderella sleep and the most things are ok now except the internal keyer.
I have also replaced the one-chip microprocessor MB8854-1244M which in fact is the keyer.
It is impossible to key the transmitter in CW-mode, nothing happens when I try.
I have run out of ideas and if someone has any suggestions please share them with me.
73
Nils SM7DVO
Russ
 

Hi Nils and welcome to the group.? I hope you are able to restore that fine radio.? However, with lighting strikes it could be just a fuse or it could lead to a whole lot of replacement parts needed.? Just depends on how much damage there is.? Good luck with it though and keep us in the loop as to your finding.

73
Russ, N4MAV

On Wed, Jan 22, 2020 at 1:59 PM Nils Ostman <n.e.ostman@...> wrote:
Hi guys,
I'm restoring an old FT-847 damaged by lightning a lot of years ago and had been lying in the schack collecting dust, according to the previous owner.
After replacing the main CPU on the AF/CNTRL board the radio woke up from it's Cinderella sleep and the most things are ok now except the internal keyer.
I have also replaced the one-chip microprocessor MB8854-1244M which in fact is the keyer.
It is impossible to key the transmitter in CW-mode, nothing happens when I try.
I have run out of ideas and if someone has any suggestions please share them with me.
73
Nils SM7DVO

 

开云体育

Hi Nils

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I currently still own my ft847 as a second and will be looking to sell it at some point.? I don’t think I can help you with your specific problem but I am monitoring the list to keep in touch.

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Welcome to the group.

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Joe VA3JLF

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Sent from for Windows 10

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From: Nils Ostman
Sent: January 22, 2020 1:59 PM
To: [email protected]
Subject: [YaesuFT847] My internal keyer isn't working

?

Hi guys,
I'm restoring an old FT-847 damaged by lightning a lot of years ago and had been lying in the schack collecting dust, according to the previous owner.
After replacing the main CPU on the AF/CNTRL board the radio woke up from it's Cinderella sleep and the most things are ok now except the internal keyer.
I have also replaced the one-chip microprocessor MB8854-1244M which in fact is the keyer.
It is impossible to key the transmitter in CW-mode, nothing happens when I try.
I have run out of ideas and if someone has any suggestions please share them with me.
73
Nils SM7DVO

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