Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Posting-Version: version B 2.10 5/3/83; site bmcg.UUCP
Path: utzoo!watmath!clyde!floyd!harpo!decvax!ittvax!dcdwest!sdcsvax!bmcg!terry
From: terry@bmcg.UUCP
Newsgroups: net.ham-radio,net.micro
Subject: XEROX Board PINOUTS
Message-ID: <865@bmcg.UUCP>
Date: Fri, 30-Mar-84 08:44:19 EST
Article-I.D.: bmcg.865
Posted: Fri Mar 30 08:44:19 1984
Date-Received: Sat, 31-Mar-84 08:31:41 EST
Organization: Burroughs Corporation, San Diego
Lines: 41

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