Roche Diagnostics May 2009
B-64 Service Manual · Version 9.0
4 Components cobas b 221 system
Peristaltic pumps (PP)
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
Slide the bypass holder down and fold the bypass nipple up.
e
For details, see Figure B-8 on page B-25.
4
Disconnect the bypass nipple, the connector tube to the tHb/SO
2
module (or
hemolyzer) and the waste tube (on the waste separator).
5
Unscrew the two screws holding the Hb cartridge and remove the cartridge (see
below).
Use the reverse order for assembly.
Peristaltic pumps (PP)
Replacing a peristaltic pump
1
Switch off the cobas b 221 system.
e
Please pay attention to Shutdown on page B-19.
2
Remove the top cover and printer 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.
A Two screws holding the Hb cartridge
Figure B-45 Hb cartridge
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