Roche Diagnostics May 2009
B-80 Service Manual · Version 9.0
4 Components cobas b 221 system
Vacuum system
Replacing the vacuum control board
1
Remove the top cover and T&D cover of the cobas b 221 system.
2
Rotate the T&D lock on the T&D module 90 degrees to the right.
e
For details, see Figure B-4 on page B-22.
3
Carefully pull the sample inlet path out to the right and remove it.
4
Unscrew the three screws holding the central measuring unit.
e
For details, see Figure B-2 on page B-20.
5
Raise the central measuring unit forward until it clicks audibly into place.
6
Remove all connectors from the vacuum control board.
7
Unscrew the screw holding the vacuum control board and remove it.
e
For details, see Figure B-59 on page B-76.
Use the reverse order for assembly.
Replacing the Actuator Board V4/V6
1
Remove top cover and T&D cover.
2
Rotate the T&D lock on the T&D module 90 degrees to the right.
e
For details, see Figure B-4 on page B-22.
3
Carefully pull the sample inlet path out to the right and remove it.
4
Unscrew the three screws holding the central measuring unit.
e
For details, see Figure B-2 on page B-20.
5
Raise the central measuring unit forward until it clicks audibly into place.
Electrostatically sensitive components!
Do not remove the fastening screws completely, because they are secured against loss.
The sample inlet path must be removed at this time, otherwise it will be destroyed by folding the
central measuring unit out.
Do not remove the fastening screws completely, because they are secured against loss.
The sample inlet path must be removed at this time, otherwise it will be destroyed by folding the
central measuring unit out.
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