Micro-controller replacement in the
SRI Model 333DataSystem
If yourModel 333 data system is
installed in anSRI GC then you
will need to gain access to theA/D
board to replace themicro-
controller chip.
Unplug theGC’spower cord.
Remove the six screws holding the
bottom cover on theGC. Then tilt
theGC up on its back so you can
see inside.
Use a 5/64th hexwrench to re-
move the four screws holding the
A/D board in theGC.
Slide theA/D board out halfway so
you can access themicro-
controller chip. Replace the chip
as described.
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Four screws hold
theA/D board
