[ICOM] Icom 765 Problem
Bruce J. Howes
bhowes at suscom-maine.net
Sat Oct 8 13:16:33 EDT 2005
Hi Paul,
Do you recall which transistors in question, Icom schematic numbers?
Appears that they are located on the main board, right?
Was it a process to correct, did you need to remove the main board?
Tnx - Bruce W1UJR
-----Original Message-----
From: icom-bounces at mailman.qth.net [mailto:icom-bounces at mailman.qth.net] On
Behalf Of paul at w8aef.com
Sent: Friday, October 07, 2005 11:33 PM
To: ICOM Reflector
Subject: Re: [ICOM] Icom 765 Problem
Check the audio output transistors for cold solder joints. My '765 had
several, cold solder joints, that is.
de Paul, W8AEF
----- Original Message -----
From: "Bruce J. Howes" <bhowes at suscom-maine.net>
To: "'ICOM Reflector'" <icom at mailman.qth.net>
Sent: Saturday, October 08, 2005 2:25 AM
Subject: [ICOM] Icom 765 Problem
> 765 #2 seems to have developed a bit of a problem.
> I turned it on last night to very low audio, could hear the signals, but
> at
> a very low level, even with the AF gain full open.
> Thinking that something may have happened to the speaker I removed the top
> cover and inspected the connector and speaker, no fault found.
> Just for good luck, and using a highly refined technique, I sharply rapped
> the chassis, BINGO, audio output full bore.
> Reinstalled the cover and she played fine for the rest of the evening.
>
> Tonight, similar problem, initial low audio, following by a good audio of
> static crackling, almost like a thunderstorm.
> I removed the antenna, static is still there.
> The received audio, AM, sounds quite nice, aside from the static.
>
> Any suggestions?
> Thought this might be a case of the PLL wax migration fault, but not sure
> as
> the audio is clear and not distorted.
>
> Tnx.
>
> 73 Bruce W1UJR
>
----
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/
More information about the Icom
mailing list