Circuit Boards - Thermo Scientific MAXQ SHKE435HP Operating And Maintenance Manual

Section 4
Service

Circuit Boards

4-4 Orbital Shaker
Warning Only qualified service personnel should perform this procedure.
Four circuit boards control the Orbital Shaker. Three boards are located in
the relay tray compartment, the fourth is behind the LCD display. Figure 4-
4 identifies the circuit boards and other major components in the relay tray.
Refer also to the relay tray wiring diagrams in Section 7.
To access the panel, unplug the shaker and move it to a sturdy location that
will allow the back of the cabinet to swing down and lie flat. Remove the
screws indicated by the arrows in Figure 4-2 and lower the back panel.
Components in the electronics panel are identified in Figure 4-4. Refer to
the parts list and the electrical schematics in the back of this manual for part
numbers.
P/N 300275 (480)
P/N 300276 (481)
Air Duct Blower
Control Relay
P/N 420064
P/N 191535
Main Power
Motor Driver
Transformer
Control Board
Figure 4-4. Electrical Component Locations, Relay Tray Compartment
P/N 190525
Relay Board
P/N 300275 (480)
P/N 300276 (481)
P/N 420085
Refrigeration
Relay
Unit Control Relay
Transformer
s
P/N 192589
Micro Processor
Board
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