Roche Diagnostics May 2009
Service Manual · Version 9.0 B-137
cobas b 221 system 5 AutoQC module
Replacing the toothed belt (long)
Replacing the toothed belt (long)
1
Switch off the cobas b 221 system.
2
Pull the AutoQC module out to the left.
3
Loosen the two screws holding the AutoQC cover by turning them about one
revolution.
4
Pull the AutoQC cover back and then left.
5
Loosen the two screws holding the cross-slide cover by turning them about one
revolution.
6
Pull the cross-slide cover up.
7
Unscrew the two screws holding the AutoQC control board cover and remove it.
e
For details, see Figure B-95 on page B-124.
8
Disconnect the cable from the AutoQC temperature sensor.
e
For details, see Figure B-96 on page B-125.
9
Unscrew the two screws holding the longitudinal slide and remove the shield.
e
For details, see Figure B-102 on page B-134.
10
Unscrew the pulley screw and remove the toothed belt.
11
Tension the new toothed belt over the toothed disk and over the pulley.
12
Fasten the toothed belt to the pulley with the screw.
13
Position the toothed belt on the driver pin of the longitudinal slide.
Use the reverse order for the further assembly.
Activate the function program
h
[System] > [Component test] > [Aggregates] > [AQC motors]
> [AQC motors] > [Service Position] to bring the motors to the service position.
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