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 */
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MONITOR POWER CONNECTOR J6
PIN # SIGNAL NAME
1 GROUND
2 Supplied from J5-7
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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
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bmcg!terry