Re: Second Sight "jumping" picture

[sbehrens@arrowweb.com (S�nke Behrens)]

rubywand@aol.com wrote:

>     On an old ROM-01, you are virtually certain to have notable noise on
>the +5 and +12 lines. (The Slot plane traces are too narrow for the
>currents '90's boards demand.) This could be causing one or more IC's to
>
>     Adding #16 leads from the power connector +5 and +12 solder points to
>the SS Slot +5 and +12 points will reduce noise. A couple .45uF 20V disc
>caps (one each from the Slot +5 and +12 points to ground) will add
>bypassing near the SS and further reduce noise. These steps may eliminate
>the shifting.

OK, I'll give that a try. What about GND? Should I run a line to it as
well? And what about the lines from the power supply to the board ...
that runs partly still over the old lines of the GS supply (couldn't
find a matching connector for the board).

>     Something else to check are socketed IC's and a socketed clock
>oscillator module-- are there any on the SS?-- which may be making a poor
>connection at one or more pins. (Scootch-up and re-socket any socketed
>IC's and modules.)

There are two ... a Lattice FPGA and an EPROM. I didn't remove the
Lattice (it's PLCC), but pressed both of them in more firmly. Didn't
solve the problem, though.

Yours
Soenke
-- 
ORCA/C buglist and other stuff at: http://www.arrowweb.com/sbehrens/