Roche cobas b 221 system User Manual

Roche Diagnostics May 2009
Service Manual · Version 9.0 B-89
cobas b 221 system 4 Components
Mainboard unit
Mainboard unit
Replacing the Mainboard unit
1 Switch off the cobas b 221 system.
e Please pay attention to Shutdown on page B-19.
2 Remove the top cover and T&D cover of the cobas b 221 system.
3 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.
4 Carefully pull the sample inlet path out to the right and remove it.
5 Unscrew the three screws holding the central measuring unit
e For details, see Figure B-2 on page B-20.
6 Raise the central measuring unit forward until it clicks audibly into place.
7 Unscrew the two screws holding the mainboard unit (see below).
8 Fold the mainboard unit down.
9 Remove all plug connectors on the mainboard.
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.
A Two screws holding the mainboard unit
Figure B-66 Mainboard unit
A

Roche cobas b 221 system Specifications

General

Brand	Roche
Model	cobas b 221 system
Category	Medical Equipment
Language	English