Checking my files, I find that the "Supplement to STARWARS" #CO-225-02 (1st Printing) has the last two pages on Signature updates. The schematics do not exactly show how to get INTO the Signature state, but I suspect if one reviews Tempest and others that one can be successful. I have not had to service a SW in years and did not need signature analysis at the either, so that is the limit to my knowledge on the matter, but the schematics set and CO-225-02 should help! Atari was expecting you to use the CAT BOX to run these tests... John :-#)# -- John's Jukes Ltd. 2343 Main St., Vancouver, BC, Canada V5T 3C9 Call (604)872-5757 or Fax 872-2010 (Pinballs, Jukes, VideoGames) www.flippers.com "Old pinballers never die, they just flip out" _______________________________________________ Techtoolslist mailing list Techtoolslist@flippers.com http://seven.pairlist.net/mailman/listinfo/techtoolslist FTP site is: ftp://ftp.flippers.com/TTL/TestEquipment