ABB IRC5 Product Manual page 210

4 Repair activities, controller IRC5
4.10. Replacement of DDR SDRAM memory on motherboardin computer unit DSQC639
Continued
Removal
Use this procedure to remove the DDR SDRAM memory on the motherboardin the computer
unit.
208
Action
1.
DANGER!
Before commencing any work inside the
cabinet, please observe the safety
information in section DANGER - Make sure
that the main power has been switched off!
on page 30.
2.
esd
WARNING!
The unit is sensitive to ESD. Before handling
the unit please read the safety information in
the section WARNING - The unit is sensitive
to ESD! on page 31
3. Remove the computer unit
4. Remove the five attachment screws, and
remove the cover plate.
WARNING!
Be careful with the fan cable when opening
and removing the cover plate. The fan cable
must not be stretched.
5. Disconnect the fan cable from the mother-
board.
Note/Illustration
Detailed in section Replacement of
computer unit DSQC639 on page
xx0600002913
• A: attachment screws (5 pcs)
• B: fan cable
Continues on next page
3HAC021313-001 Revision: P
200.