A2 Navigation Data Generator

End is Labeled:
A-2    NAV   DATA   GEN                     100-101526
N       L           J                                       E  D  C  B  A
G       R          R                                       T  T  T  T  T
r        e           e                                         P  P P   P  P

A2 PCB
 
 
blank blank blank electro cap electro cap
SN74LS163N Beckman  899-1-R270 M SN74LS123N header   r-r----- TI SN74128N
na Beckman 899-1-R1k TI SN74LS32N AM25LS08PC 74128N
AM25LS151PC 076-200040  PROM? S 74LS00N DM74LS32N AM25LS07PC
na AM25LS07PC TI SN74LS151J Beckman  899-1-R1k TI SN74LS02N
AM25LS07PC 076-200037  PROM? 076-200041   PROM? 076-200042   PROM? TI SN74LS08J
na TI SN74LS161N TI SN74LS161N TI SN74LS161N TI SN74LS37N
TI SN74LS161N 076-200039   PROM? DM74LS74N TI SN74LS86N blank
na 076-200038   PROM? SN74LS163J DM74LS163N electro cap

The wire wrap PC board is marked    STI 010-100534  REV  A