ABB IRC5 Product Manual page 136

4 Repair activities, controller IRC5
4.8. Replacement of DDR SDRAM memory on motherboard in computer unit DSQC639
Continued
Removal (new design of the computer unit DSQC 639)
The procedure below details how to remove the DDR SDRAM memory on the motherboard
in the computer unit.
134
Action
5. Disconnect the fan cable from the mother-
board.
6. Gently lift the DDR SDRAM memory straight
up.
Action
1.
DANGER!
Before 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
2.
esd
WARNING!
The unit is sensitive to ESD, before handling
the unit please observe the safety
information in section WARNING - The unit is
sensitive to ESD! on page 27
3. Remove the computer unit
4. Remove the cover plate.
Note/Illustration
xx0600003033
• A: DDR SDRAM memory
NOTE! Always grip the memory around
the edges to avoid damage to the
memory or its components!
NOTE! Immedialety put the memory in
an ESD safe bag or similar!
Note/Illustration
26.
Detailed in section
computer unit DSQC639 on page
3HAC027707-001 Revision: D
Replacement of
122.
Continues on next page