[ICOM] IC-765

[Larry Winslow]

I'm going to show my age but a very effective contact cleaner is in 
one's wallet - the dollar bill, or for the wealthy amongst us the 
twenty. It has the right amount of abrasiveness without grinding away 
the relay contacts.

73 - Larry WØNFU
larry_w at comcast.net


bonddaleena at aol.com wrote:
>
> Mike, I just had a similar problem on my 761. The problem was the T/R 
> relay contacts. It was an easy fix (once you can get to the relay!!). 
> A little contact cleaner on a strip of business card fixed her. The 
> relay has a clear plastic cover. I have found that this particular 
> relay is used in a lot of Icoms and they exhibit the same problem. 
> This is listed on Icom's Website as a 'problem' under the 761.
> I'm sure Tim is also correct about the solder connections.......
>
> 73
>
> ron
>
> N4UE
>
> -----Original Message-----
> From: Tim Duffy K3LR <k3lr at k3lr.com>
> To: 'ICOM Reflector' <icom at mailman.qth.net>
> Sent: Tue, 11 Nov 2008 12:11 pm
> Subject: RE: [ICOM] IC-765
>
>
>
> Hi Mike:
>
> I have three IC765s and have observed the same problems in the past.
>
> Most of the issues with the 765 like this are the result of poor solder
> joints on the suspect PC board. Many of the problems I had were cured 
> with
> re-soldering joints on the boards (the ones responsible for the 
> circuit in
> question).
>
> This solder joint problem was real bad on the Kenwood TS940 series of 
> radios
> and even some TS930. Take a look at the PC boards in your 765 and you 
> will
> see for yourself where bad solder joints are.
>
> One of the problems during the time the 765 was built was the quality 
> of the
> solder used (recovered solder) in Japan for wave soldering.
>
> The 765 is still one of the VERY best performing (non DSP) radios around.
>
> 73!
> Tim K3LR
>
> 100% Icom station
> http://www.k3lr.com
>
>
>
> -----Original Message-----
> From: icom-bounces at mailman.qth.net 
> [mailto:icom-bounces at mailman.qth.net] On
> Behalf Of w9mws at aol.com
> Sent: Tuesday, November 11, 2008 10:55 AM
> To: icom at mailman.qth.net
> Subject: [ICOM] IC-765
>
> I just acquired a 3900 S/N IC-765 as a second radio.  So far it's
> working well and I'm enjoying it.  There are a couple of small issues,
> that I can't find any reason for, that perhaps someone on the list can
> shed some light on:
>
> Approximately 60% of the time when I power on the radio the audio is
> "muted".  It's like the T/R relay is in the mute position.  If I punch
> the 14 MHz button on the keypad and then go back to the original band,
> audio is back to normal.
>
> The other oddity is the display which seems to be "dimmed" a bit.  Each
> display section has segments with a "bright" portion and a "dim"
> portion and comparing it to a friends radio, mine display is visibly
> dimmer on both the white and red display elements.  With no reference
> to display dimming in either the owners manual or the tech service
> manual, I'm not sure what I have.
>
> Thanks for any help from the group.
>
> 73, Mike W9MWS
> ----
> 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/
>
> ----
> 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/
>
> ----
> 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/
>