AP Blot - SERVICE MANUAL
SECTION 3
MAINTENANCE PROCEDURES
Doc. N° MDS-AP-26-00-02
Rev.01
Date: 02.04.2009
Page 56
3.8. OPTICAL SENSORS
3.8.1. DESCRIPTION OF HOW OPTICAL SENSORS FUNCTION
The optical sensors detect the position or movement of a mechanism and translates this information into an electrical
signal. The sensor consists of an infrared diode emitter and a photosensitive receiver, in a single container.
Sensor 1 is utilized for the zero position; Sensor 2 is utilized for detecting the position of the first well or first filter.
Encoder zero
position
1
2
1° well position
1 = Zero LED
2 = Signal LED
3.8.2. REGULAR MAINTENANCE
3.8.2.1.
Cleaning opto
Clean opto sensors around every 6 months using a soft brush to remove any traces of dirt or dust.
3.8.2.2.
Checking procedure
The various opto PCBs function in different units. The following table lists these different units, the PCBs and the
relevant paragraph to refer to for replacement procedures.
UNIT
PCB
Ref. procedure
Dilutor
SIDILOP
Para. 3.3.3.7
X axis
XGOLAV (X movement)
Para. 3.4.4.3
Y axis
INTEROP2
Para. 3.4.4.7
Z axis
INTEROP2
Para. 3.4.4.7
encoder slits
Opto couplers in plastic box
1
2
