Human HumaStar 300, Service Manual

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5. Rotate the encoder disk (5) until the yellow led (DL3) is lit on the encoder
board 17903/50. Tighten loosely screw (4) and remove spacer device (D/3).
6. Repeat the operation as described in „18.6.1.1 To Check Electronic Align-
ment“ and tighten the screws.
7. Replace the cover (14) and block it with screws (15). Replace the Probe with
its tube.
18.6.1.3 Replace the belt and motor of probe movement
Replacement of belt:
1. Remove the Probe and its tube.
2. Remove screws (15) and the Arm cover (14).
3. Lower the Probe holder (2) to about half its length by rotating the screw (13)
with a screw driver.
4. Loosen nuts (6) (key 5,5 mm) that hold motor (7) and release the belt.
5. Remove screws (10), remove the closure (11) and raise slowly the whole
group (2 and 13) about 10mm. Replace the belt with a new original part.
Replace the motor:
6. Remove the connector from the driver board, remove the cable and the mo-
tor.
7. Disassemble the motor by removing:
- The pulley (3) by loosening the screws (8) (hexa key 1.5 mm)
- Screws and the encoder board 17903/50.
- Encoder disk (5) by loosening the screw (4), and the spacer.
8. Reassemble the parts on the new motor, make sure the encoder board faces
the right way (see „11 Encoder Motore“).
Reassemble everything and make sure to align the motor pulley (8) with that of
the screw. Adjust the tension of the belt and lock it with nuts (6).
At the end proceed to align the Probe („18.6.1.2 To Align the Probe into Home
Position“).
18.6.1.4 to Replace the Mixer Motor
1. Follow procedure from 1 to 3 in „18.6.1.2 To Align the Probe into Home Po-
sition“ above.
2. Remove connector of the wire connected to the level sensor board
(EB0124.02).
3. Lift the Probe holder (2) remove it from cam (6) and rotate it. „18.6.1.4 To
Replace the Mixer Motor“.
4. Remove cam (6) by loosening screw (5) (key 1,5mm).
operation to be made with
analyzer turned off.
operation to be done with
analyzer turned off.
Make sure not to loose the
isolation o-ring (13),
without it the probe liquid
level Sensor will not work.