OHAUS EB SERIES, Service Manual

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CHAPTER 3 REPAIR PROCEDURES
Ohaus Corporation www.ohaus.com 3-10 EB Series Scales Service Manual
3.4 REPLACING THE LOAD CELL ASSEMBLY (WITH FRAME) continued
5. Refer to Section 3.5.1 and check overload stops on the new assembly.
6. Lift the Load Cell Assembly out of the Bottom Housing and replace with the new
one. Install screws.
7. Solder the Load Cell wiring to the Main PC Board. Make sure that the color
coded wiring is installed in the correct locations. (See Figures 2-2 and 2-3 and
the label on the replacement Load Cell.)
8. Reconnect the battery and power connectors to the Main PC Board and connect
the battery terminal wiring to the battery.
9. Connect the Display Cable from the Display PC Board to the Main PC Board.
10. Install the Main PC Board into position in the slots on the Bottom Housing and
secure with the screws and washers previously removed.
11. If necessary (on very early models), move the Main PC Board Jumper from
normal to service position. (See Figure 2-2.)
12. Position the Top Housing in place over the scale temporarily and install the
Platform Support and Platform in place.
13. Calibrate the scale according to the Instructions in Appendix A. (If jumper was
moved in Step 11, turn off scale after calibration and move the jumper to the
normal position.)
14. Reassemble the scale and replace the Platform Support and Platform on top of
the scale.
15. Turn the scale off then on. It will go through all the self-testing. When self-testing
is completed, the scale should work normally.
16. After repair, initiate Performance Tests. (See Chapter 4.)