Renesas H8SX/1638, Руководство пользователя

Страница: 18 / 46

Section 2 Connection Procedures
Rev. 3.00 Sep. 08, 2008 Page 6 of 30
REJ10J1870-0300
2.1.4 Fastening the IC Socket Connector
CAUTION
1. Use the screwdriver provided for tightening screws.
2. 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.
3. If the emulator does not operate correctly, cracks might
have occurred in the solder. Check conduction with
a tester and re-solder the IC socket if necessary.
Fasten the user system interface board to the IC socket for a PLQP0120LA-A package on the user
system with the four screws (M2
x
10 mm) provided. Each screw should be tightened a little at a
time, alternating between screws on opposing corners. Take special care, such as manually
securing the IC socket soldered area, to prevent the soldered IC socket from being damaged by
overtightening the screws or twisting the components.