ocr: Applelalk Connector Schematic An Excerpt from: The AppleTalk Personal Network lechnical specitications by Frederick E. Davis DB-9 DB-25 3-Pin Minature DIN pins pins R3=1k9 Connectors with Switch 8 19 - V VV 1 6 (J1 andJ2) Pin 4 20 R4=1k2 2 9 3 W 5 3 5 2 J2: 2 R2= 1009 Gnd. Case R5=1k9 IVV R1=1M2 W Shell C1=U.1 microtarad The AppleTalk connection modules contain a transtormer with a 1:1 turns ratio and tight coupling between primary and: secondary windings. The transformer has electrostatic shielding that provides ground insulation, as well as pro- tection from static discharge. The two three-p ...
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