Roche Diagnostics May 2009
Service Manual · Version 9.0 B-57
cobas b 221 system 4 Components
COOX module (cobas b 221<2/4/6> systems only)
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
Pull the primary light guide and the light guide for bilirubin out of the clamp.
e
For details, see Figure B-36 on page B-54.
7
Disconnect the two tubes from the cuvette holder and open the cuvette holder.
e
For details, see Figure B-41 on page B-58.
8
Unscrew the two screws holding the cuvette holder and pull out the cuvette holder
to the front.
e
For details, see Figure B-41 on page B-58.
9
Disconnect the primary light guide and the light guide for bilirubin from the
cuvette holder and slide them out to the back.
10
Open the bayonet closure of the primary light guide plug and remove it.
11
Unscrew the two screws holding the light guide conduit and pull the light guide
conduit out to the back (see below, C).
Use the reverse order for assembly.
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.
Never bend the primary light guide, because this may damage it.
A Primary light guide
B Light guide conduit
C Two screws holding the light guide conduit
Figure B-40 Light guide conduit
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