
ADV Service Manual P/N 83020790 A
Ohaus Corporation
www.ohaus.com
32
10. Place the Transducer in position and mount with 1 screw.
11. Connect the Transducer cable back to the Sensor Board.
12. Connect the Top Cover membrane switch cable to the Main PC Board. The Top Cover should be lying in
front of the Base not on top. If you are unable to connect the cable properly, see Figure 4-7 which is the
connector on the main PC board. You can operate the balance directly from the connector by momentarily
shorting out the pins as indicated to turn it on or off.
Figure 4-7. Main Board Display Indicator Connector.
13. Place the Platform and Subplatform in place on top of the Transducer. Apply power to the balance and
turn the balance on.
14. Check the travel of the Shaft Indicator up and down by moving the Sensor Board up and down slightly on
the side with the two screws which should be slightly tightned. If the Sensor Board is improperly positioned,
the Shaft indicator will stay locked in one position. Adjust the Sensor Board up and down until the display
indicates other than 8.4. If the Sensor Board is positioned too high or too low, the display indicates Error 8.4.
Position the Sensor Board until the display indicates other than 8.4, then tighten the two screws on the right
hand side of the Sensor Board. The Shaft Indicator travel should be equal in it's up and down motion. The
amount of travel is about 15 to 20 thousands of an inch. If the Sensor Board repositioning does not allow the
Shaft Indicator to move properly, adjust the Up/Down Stop and try repositioning the sensor Board again. After
completing this adjustment, turn the balance off and remove the Platform and Subplatform. Install the
remaining screws in the Transducer.