ENGINEERING CHANGE NOTICE ECN Number:____________9_____________________ Product:_____________MPZ80___________________ Part Number(s):______ALL LEVELS______________ Current Board Revision Number:______3________ New Board Revision Number:__________3A_______ Purposå  oæ Change:__Provide adequate pull up on the S-100 ____ /PRESET_line (pin 75). This line is not terminated on the_____ WB I/O board and must be pulled up on the CPU board.___________ Modifications (attach additional sheets if needed): _Replace__ 4.7K ohm, 1/4 watt resistor at board location 4D with a 220 ohm 1/4 watt resistor. This will make /RESET_more immune to _____ noise within the system._______________________________________ APPROVED: Engineering:______________________Date__/__/__ Production:_______________________Date__/__/__ Quality Assurance_________________Date__/__/__ Customer Service__________________Date__/__/__ Purchasing________________________Date__/__/__ Marketing_________________________Date__/__/__ EFFECTIVITY: [X] Immediate - notify current production [X] Notify users and update stock [ ] Phase in as stock is depleted Submitted by:____Bob Groppo_______________________on 11/22/83 Page_1_of_3_ DRAWINGS?_YES___ TYPEº SCH¬ BOM¬ SILKSCREEN Form ECN Rev-2 9/83 .pa Š ENGINEERING CHANGE NOTICE ECÎ: ______9_____ß    Dateº_11/22/83_ PRODUCTº  ___MPZ80___________ß Pageº  _2ß oæ _3_ DELETE FROM BILL OF MATERIALS: ITEM DESCRIPTION PART # QTY. 4.7K OHM, 1/4 WATT, 5%, C.F. 1 SUBSTITUTE IN BILL OF MATERIALS: ITEM DESCRIPTION PART # QTY. 220 OHM, 1/4 WATT, 5%, C.F. 1