IC2SAT.11 Yeah, the above is crude, just meant to give the relative locations of the mysterious diode, SP1, R38, R39, R41, R42, R43, and R61. The 3-terminal box with an arrow drawn to it (the arrow is in the original image) looks like the below. A diode is connected from the lower left tab to the upper tab. ___ | | -------------------- | / | | --- | | /_\ | | ____| | | / | | | | -------------------- | | | | --- --- >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> [diode matrix programming] To simplify/fool-proof this, if the schematic has: (X) --->|--- (Y) I'll say "from X to Y". From the "IC-2SAT IC-2SET SCHEMATIC DIAGRAM": Japan Version D6: DA115 from KEYI2 to KEYS2 Europe Version D5: DA115 from KEYI0 to KEYS3 D6: DA115 from KEYI2 to KEYS2 Italy Version D5: DAN202U from KEYI1 to KEYS3 and from KEYI0 to KEYS3 D6: DA114 from KEYI0 to KEYS2 U.S.A. Version D4: DA115 from KEYI2 to KEYS3 D9: ISS254 from KEYI1 to KEYS2 Australia Version D5: DA114 from KEYI1 to KEYS3 D6: DA115 from KEYI2 to KEYS2 Asia Version D4: DA115 from KEYI2 to KEYS3 Now, can anyone use this to figure out the Icom-Europe memo??? Bob KC9RG cromwell@ecn.purdue.edu