terry@bmcg.UUCP (03/30/84)
I have determined the pinouts of the connectors on the Xerox 820-1 board. I have the schematic on order but was anxious to see this board work so I resorted to real hardware hacking. I hope further communication on this board will continue. POWER SUPPLY CONNECTOR J5 PIN # SIGNAL NAME 1 -12v 2 +12v 3 +12v or +24v to Disk Drive Conn. Pin 18 /* Xerox supplies the voltage to the drive from a single supply. */ 4 GROUND 5 GROUND 6 GROUND 7 /* Voltage supplied TO J6-2 for Monitor */ 8 +5v 9 +5v /* This voltage also goes to the Disk Drive Conn. Pin 19 */ __________________________________________________________________ MONITOR POWER CONNECTOR J6 PIN # SIGNAL NAME 1 GROUND 2 Supplied from J5-7 __________________________________________________________________ MONITOR VIDEO CONNECTOR J7 PIN # SIGNAL NAME 1 NC 2 NC 3 Vertical Sync. 4 Horiz. Sync. 5 Video Out 6 NC 7 NC 8 GROUND 9 GROUND 0 GROUND __________________________________________________________________ bmcg!terry