Section 3 Installing the MCU on the User System
Rev. 3.00 Sep. 08, 2008 Page 17 of 30
REJ10J1870-0300
Section 3 Installing the MCU on the User System
CAUTION 1. Check the location of pin 1 before inserting the MCU.
2. Use a screwdriver whose head matches the screw head.
3. The tightening torque must be 0.054 N•m or less.
If the applied torque cannot be accurately measured,
stop tightening when the force required to turn the screw
becomes significantly greater than that needed when first
tightening. If a screw is tightened too much, the screw
head may break or an IC socket contact error may be
caused by a crack in the IC socket solder.
4. If the MCU does not operate correctly, cracks might have
occurred in the solder. Check conduction with a tester
and re-solder the IC socket if necessary.
Check the location of pin 1 before inserting the MCU into the IC socket on the user system, as
shown in figure 11. After inserting the MCU, fasten the socket cover with the four screws (M2.0
x 6 mm) provided for this. Take special care, such as by manually securing the IC socket soldered
area, to prevent the IC socket from being damaged by overtightening the screws or twisting the
components.