NEW BRUNSWICK SCIENTIFIC Innova 4300, Manual To Operations, Page: 43 / 61

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New Brunswick Scientific User’s Guide
c. Reconnect the harness wiring to connectors J101, J102, J103 and J104. Make
sure that each connector is properly positioned (keys mate and no pins remain
exposed).
d. Replace the panel and secure with the two 3/8 inch hex nuts.
19. Replace the panel and secure with the two 3/8 inch hex nuts.
20. Connect the line cord to the rear of the shaker.
5.11 Replacing the Temperature Control Board
1. Switch the shaker OFF and disconnect the line cord from the rear of the shaker.
2. Open the lid and remove the two 3/8 inch hex nuts. These nuts are located on the
back of the front panel.
3. Carefully push the two threaded studs, now exposed, so that the control panel
eases out from the lid.
4. Disconnect the harness wiring from connectors J101, J102, J103 and J104 (
see
Figure 11 above ).
5. Remove the three ¼ inch screws and nylon flat washers.
6. Disconnect the temperature control board from the main control board, being
careful not to damage the board-to-board connectors. Apply force perpendicular
to the plane of the board.
Do not lift from one end.
7. Snap the new temperature control board onto the main control board, making sure
the board-to-board connectors mate properly.
8. Replace the three nylon flat washers and ¼ inch screws.
9. Reconnect the harness wiring to connectors J101, J102, J103 and J104. Make sure
that each connector is properly positioned (keys mate and no pins remain
exposed).
10. Replace the panel and secure with the two 3/8 inch hex nuts.
11. Connect the line cord to the rear of the shaker.