[Icom] Help with IC-781 rig

Wed, 3 Apr 2002 13:33:20 +0100

check R 20 a 3 ohm think 3 watt resistor  on the PI unit board under the
scope unit  it is on the extreme right colose to bottom of the board,
 this is a very comon fault, I made my own resistor out of resistance wire
after replacing this resistor a few times probly closer to 4 + watts NO
PROBLEMS since a friend of mine has his resisor out board I could talk him
into what I did.  I had replace this resistor with ohmite resistors correct
resistance and wattage but they opened once in a while so went to my own lil
bigger in current ...no problems since.
My 781 is 1990 vintage bought new back then only problems with it was that
resistor and the choke on the reg board replaced with the L16 as a FAQ said
in the icom web page on problems and fixes for the 781 this had to do with
the crt .
I would get all the faq on the icom page for the 781.

Steve K2SB ...-.-
----- Original Message -----
From: "Fern Rivard" <[email protected]>
To: <[email protected]>
Sent: Wednesday, April 03, 2002 06:57
Subject: [Icom] Help with IC-781 rig

> I have a friend who has an Icom IC-781 which has died over the week end.
It
> won't come on and he doesn't have a service manual for it. Anyone got one
> for sale or can they be downloaded from somewheres?  Also, he suspects
that
> the problem may be in the switching power supply and regulators. Anybody
> familiar with that problem.   Best regards from Fern
>
>
> ----
> Your Moderator: Dick Flanagan W6OLD, [email protected]
> Icom FAQ: http://www.qsl.net/icom/
>