[ICOM] IC781 display problem

[Sam Harner]

If you need a crt do an  ic-781 search on Ebay there is a fella that sells
new replacements in amber green at a reasonable price

-----Original Message-----
From: icom-bounces at mailman.qth.net [mailto:icom-bounces at mailman.qth.net]On
Behalf Of Bruce
Sent: Friday, April 18, 2008 12:59 PM
To: ICOM Reflector
Subject: Re: [ICOM] IC781 display problem

Doug,
Check the power supply connection at the back of the CRT, it should
measure about 12 Volts. If that checks ok then try using an external
NTSC monitor plugged into the rear panel to see if video is still ok
or is it in the video output circuit/section of the unit.
Icom no longer sells the CRT or parts..they have a replacement LCD
for a ripoff price of $900 last time I checked.
There may be another source for the CRT elsewhere so an internet
search may be in order..
Other than those items it could be a verticle output transistor is
getting ready to go out..
73's
Bruce W7BCW
At 05:59 AM 4/18/2008, you wrote:
>My 781 has developed an annoying problem with the display.
>
>Sometimes on power-up, the display is compressed to a total height of
>about 3/4-inch, and jumps up and down like an old TV with vertical
>hold out of adjustment.
>
>Other times, the display is the right size, but the brightness jumps
>between two levels.
>
>Before I go digging too far, I thought I'd ask this group - has anyone
>seen this before? Is is a CRT problem, power supply problem, or
>something (or things) else?
>
>73,
>
>Doug K1DG
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----
Your Moderator: Dick Flanagan K7VC: icom-owner at mailman.qth.net
Icom Users Net: Sundays, 1700Z, 14.316 MHz
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