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Circuit Boards
Temperature Sensors
Heater Element
Circuit Breaker
Thermo Scientific
Four circuit boards control the Orbital Shaker. Three boards are located in
the relay tray compartment, the fourth is behind the liquid crystal display.
Refer to the relay tray illustrations on the following pages.
Two temperature sensors are located on the air intake grille on the right
side of the chamber (Figure 4-7). To access these sensors, remove the
protective cover, then disconnect the sensors from their respective clips.
Figure 4-7. Temp Sensor Location
Warning Only qualified service personnel should perform this procedure.
Warning Remove and lockout electrical power when working on or near
the heating element connectors. Allow sifficient time for the heating
elements to cool before reaching into that area.
A manual reset circuit breaker is located
between the heating element electrical
connectors on the top of the heater
assembly (Figure 4-8). The heating
element is attached to the duct wall
behind the grille. To access the heating
element and this circuit breaker, remove
the eight Phillips screws securing the
right side grille to the chamber wall
(Figure 4-7).
s
Heating Element
Connectors
Reset Button
Figure 4-8. Circuit Breaker Reset
MaxQ SHKE8000 Series Shakers
Section 4
Service
4-5
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