ICD Flicker Free Video2
01-Jun-93 00:47:39
Sb: #101933-ICD Flicker Free Video2
Fm: Richard Darling 75000,344
To: Joe Kuzma 70674,1065
Joe – Good news and bad. Good – my board is now working fine; bad –
I don't know why! In playing with the CLIP jumper on the FFV2 and
disconnecting the RGB monitor with the power on, I accidentally
grounded or shorted one or more pins on the RGB output port (my guess
is I shorted 12 to 23 ie. 5 volts went to the vertical sync line!).
Anyway, both the RGB and VGA screens went blank, and I turned the
power off for a period of 'meditation'. When I turned it back on I
got a 'software error' message instantly (apparently from
Kickstart!), and by the time I realized I was reading the message on
the _VGA_ monitor I had already clicked the mouse (so I don't have a
record of what the error was), the bootup proceeded otherwise
normally, and I suddenly had a rock-steady picture on _both_
monitors. Both pots now work beautifully in fine-tuning the quality
of the VGA image. The FFV2 has now been working fine for over 48
hours. I do have the CLIP jumper in the ECS position, even though I
have a normal Denise, but it also works in the normal position. If I
can make any recommendation from my experience it is _not_ to hit the
vertical sync line with 5 volts, but possibly to change the position
of the CLIP jumper, turn the machine OFF and then back ON, and see
what happens. I never did get to try the scope. Good luck, and keep
me informed. I will be talking to the ICD tech about my experience,
and will pass along anything of interest. Dick