TurboLaser Postscript Board                         AST Part Number 202219-001

The AST TurboLaser Postscript Option is an upgrade for the TurboLaser and
TurboLaser/EL that allows for Adobe Postscript capabilities.  A switch at the
rear of the printer will allow manual switching between Postscript and LPC
modes.  The installation of this upgrade is a fairly complex process, and is
described in full in the "Postscript Installation Supplement" (AST P/N
000621-001).  Basic Switch, Jumper, and Postscript board layout information
are described below.


SWITCH SETTINGS

    SW1 - Paper Size
        ON  = A4
        OFF = Letter (8-1/2x11)

    SW2 thru SW6 - Factory Test
        ON AT ALL TIMES

    SW7 and SW8 - Communication Parameters

                  SW7   SW8
                 ===========
       *1200      OFF   OFF
        9600      OFF   ON
        PARALLEL  ON    OFF
        APPLETALK ON    ON

        NOTE: In order to use rotary switch installed at rear of printer,
              these switches must both be OFF.


CONNECTIONS

    J2 - Power Supply
   *J3 - Rotary Switch
    J4 - Connects to J5 on MUX Board
    J5 - RS-232 Cable
    J6 - AppleTalk Cable
    J7 - Parallel Cable
    J8 - SCSI Interface (Not Used)

    NOTE: If the revision level of the Postscript board is "X3" or lower, the
          J3 connection is 4-pin, and the switch assembly must correspond (AST
          Part # 202261-002).  If the board revision is "X4" or later, the
          switch assembly (P/N 202261-001) is keyed so as not to use pin 2 of
          the five pins at J3.




















SWITCH AND CONNECTION LOCATIONS

    ͻ
                           FRONT OF PRINTER                    
                                                               
                                                               
                                                               
                                                               
                                                               
                                                               
                                                               
                                                               
                                                               
                                                               
                                                               
                                                               
                                                               
                                                           +-+ 
                                                     SW1-->| | 
                                                           | | 
                                                           +-+ 
                                                               
                 J4        J5         J6    J7        J8       
     J2   J3     ********  *********  ****  ********  ******** 
     ***  *****                                                
    ͼ
