To:    Dean Lehocky
       ADCO Circuits
       1900 Northfield Drive
       Rochester Hills, MI  48309-3870
       Phone:  (810) 853-6620
       FAX:    (810) 853-6698

FROM:  Steve Gross and Dan Edmunds
       Physics Department
       Michigan State University
       East Lansing, MI   48824-1116
       Phone: (517) 355-8525
       FAX:   (517) 355-6661

Subj:  Instructions for the assembly of the
       Foundation Module Revision A.2 Circuit Board
       MSU Purchase Order Number:   20758

Date:  15 October 1996

Dear Dean:

Below please find instructions for the assembly of the MSU Foundation
Module Rev. A.2 (FM) circuit board.  Note that this build is divided
into 3 portions:

    1. "first article" build of 4 units, scheduled for October 28, 1996
    
    2. build of 16 more units (for a total of 20), pending availability 
       of Xilinx components

    3. build of 140 units of a card which is nearly identical to the FM,
       with the exception that the array of 240 QFP components will
       contain 16 units (with associated capacitors) rather than 4 as
       in the FM, planned for 1Q-1997.  

In general, we expect you to perform this build to standard industry
best practices and ANSI/IPC-A-610B standards.  We have a few specific
points to address regarding component usage:

    1. Component U30, a through-hole component specified in the BOM as
       Company Part Number pn-XC17256L_8DIP (a PROM) should be replaced
       on the board with Company Part Number pn-dip_8_socket (a
       socket).  

       Note that we have provided these sockets, but have not provided
       the PROMs, which we will install in-house.  


    2. Components R146 through R154, through-hole components specified
       in the BOM as Company Part Number pn-106A560 (resistors), should 
       be replaced on the board with Company Part Number pn-sip_6_socket
       (sockets).  

       Note that we have provided "socket strip" from which appropriate 
       length segments can be cut, but have not provided the resistors,
       which we will install in-house.



    3. Component P8, a through-hole component specified in the BOM as
       Company Part Number pn-FTC-1101 (a daughterboard) should be
       replaced on the board with Company Part Number pn-AMP_104078-6
       (a connector).  

       Note that we have provided the connector, but have not provided
       the daughterboard, which we will install in-house.


    4. Connectors P1-P5 should be attached to the board using the
       supplied 12mm x 2.5mm hardware.


    5. Components C40 and C41 (aluminum electrolytic capacitors) must be
       installed OPPOSITE to the polarity indications given on the
       circuit board, due to an error in the design.  


Please feel free to contact us regarding any assembly issues that arise
from these instructions.