4 Repair activities, controller IRC5
4.12. Replacement of motherboard in computer unit DSQC639
3HAC021313-001 Revision: K236
© Copyright 2004-2008 ABB. All rights reserved.
Removal (old design of computer unit DSQC 639)
The procedure below details how to remove the motherboard in the computer unit.
Action Note/Illustration
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 28.
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 29
3. Remove the computer unit. Detailed in section Replacement of
computer unit DSQC639 on page 226
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.
xx0600002913
• A: attachment screw (5 pcs)
• B: fan cable
5. Disconnect the fan cable from the mother-
board.
6. Remove the Compact flash disk. Detailed in section Replacement of
Compact Flash memory in computer
unit DSQC639 on page 272.
7. Remove the PCI boards. Detailed in section Replacement of PCI
boards in the computer unit DSQC639
on page 249.
Continued
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