ABB IRC5 Product Manual page 130

4 Repair activities, controller IRC5
4.7. Replacement of motherboard in computer unit DSQC639
Continued
Removal (old design of computer unit DSQC 639)
The procedure below details how to remove the motherboard in the computer unit.
128
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 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.
6. Remove the Compact flash disk.
7. Remove the PCI boards.
Note/Illustration
26.
Detailed in section
computer unit DSQC639 on page 122
xx0600002913
• A: attachment screw (5 pcs)
• B: fan cable
Detailed in section
Compact Flash memory in computer
unit DSQC639 on page
Detailed in section
boards in the computer unit DSQC639
on page 137.
3HAC027707-001 Revision: D
Replacement of
Replacement of
153.
Replacement of PCI
Continues on next page