Roche Diagnostics May 2009
B-54 Service Manual · Version 9.0
4 Components cobas b 221 system
COOX module (cobas b 221<2/4/6> systems only)
Replacing the Polychromator Bilirubin
e
For instructions, see COOX module (cobas b 221<2/4/6> systems only) on page B-10.
1
Remove the rear panel of the instrument.
e
For instructions, see Removing the rear panel on page B-20.
2
Unscrew the four screws holding the right side panel and remove the side panel.
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
Pull the two light guides out of the clamp.
8
Disconnect the two tubes from the cuvette holder and open the cuvette holder.
e
For details, see Figure B-41 on page B-58.
9
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.
After replacing the polychromator bilirubin, a code must be entered in the protected setup.
For this purpose, record the 16 digit code located on the polychromator bilirubin!
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 Light guide clamp
Figure B-36 Light guide clamp
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