----- Original Message -----

From: tony

To: Technical Tools Mail List

Sent: Sunday, April 24, 2005 7:28 PM

Subject: [Techtoolslist] sega outrun stuck in reset

i can not get the board to run at all it is stuck in a reset

if i tie the hault and reset high i still can not get the 9010 to go past the first address

something is sending a rest pulsing and the screen just flashes with garbage lines on it

i pulled all roms and checked them in a programmer

and tried swaping out the proms with ones on a known good board

also swapped the cpu board with a know good one so i know the problem is in the cpu board

and the video board is good

i tried to bug trap all ttl 7400's in the reset circuit and replace any thing i found bad some 74ls116's

is this a ram problem ?

i am using a afterburner schematic i can not find the outrun one the cpu 1 should be on the outside right ?

how can i get the fluke to run to get this fixed

thanks

tony

 

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