Eppendorf 3100 Digital Water Bath Shake - Manual (Page 38)

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Figure 13: Control Board Replacement
4. Disconnect the harness wiring from connectors J1 and J2.
5. Remove the three hex spacers and 2 5/16 inch hex nuts.
6. Remove the green wire and keypad ground lead.
7. Remove the two screws that fasten the heat sink to the front panel bracket.
8. Lift the board out of the front panel and disconnect the keypad connector from J4.
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NOTE:
Be careful not to lose the five ¼ inch spacers or the gray insulator.
9. Position the gray insulator on the solder side of the new main control board and
connect the keypad connector to J4.
10. Make sure the five ¼ inch spacers are in place on the mounting studs and mount
the new main control board.
11. Reinstall the two screws that fasten the heat sink to the front panel brackets, but do
not tighten at this time.
12. Reinstall the three hex spacers, and tighten.
13. Reinstall the keypad ground lead and the green wire from the main chassis.