Roche cobas b 221 system Service Manual page 111

cobas b 221 system
Roche Diagnostics
Service Manual · Version 9.0
4 Unscrew the three screws holding the central measuring unit.
e
For details, see Figure B-2 on page B-20.
Do not remove the fastening screws completely, because they are secured against loss.
5 Raise the central measuring unit forward until it clicks audibly into place.
The sample inlet path must be removed at this time, otherwise it will be destroyed by folding the
central measuring unit out.
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.
Never bend the primary light guide, because this may damage it.
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).
A
B
A Primary light guide
B Light guide conduit
Figure B-40 Light guide conduit
Use the reverse order for assembly.
COOX module (cobas b 221<2/4/6> systems only)
C Two screws holding the light guide conduit
4 Components
C
May 2009
B-57