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PLC Health Monitoring & Reporting Sys 3-9 Manual EPM40002083-001 Rev -
The MCU is pressed into a rectangular socket. This socket has a notch along the
outside edge on one of the short sides this is the top side of the socket.
CAUTION!
Do not use excessive force when you remove or install the chip
from/into its socket. Excessive force can bend or damage the MCU
Pins or the socket.
Step 1
Gently remove the old MCU using a small flat head screwdriver to pry it free of its
socket. Set aside the old MCU.
Step 2
Carefully place the new MCU in the empty socket with top of the MCU and pin 1
in the same locations as noted earlier. Inspect all of MCU’s pins checking that
each pin is inserted into its respective contact and that none of the pins of have
been "rolled under" or "bent out" of the socket.
Step 3
Carefully press the new MCU into the empty socket until it is firmly seated on the
socket.
Step 4
Place the old MCU into its replacement’s empty shipping container.
A detailed drawing showing the location of the MCU in the Flash-Head’s Digital Master
Controller is shown in Figure 3.3-5.