CHAPTER 3 MAINTENANCE PROCEDURES
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Adventurer ™ Balances Service Manual
3.6.3 Main Printed Circuit Board (PCB) Replacement
– All Balances
If the Display persistently Overload or Underload condition and normal remedies fail to solve the
problem, the PCB may need to be replaced.
1. Disconnect the Load Cell Cable, RS232 Cable, and Power Cable.
2. Remove the screws on the Main PC Board which secure it to the Base.
3. Install replacement Main PC Board in the reverse order as removed. Check the LCD
display on the new board and remove the protective plastic covering if in place.
4. Reassemble the balance.
5. Complete the PCB installation using the Repair & Service Tool
– see Appendix B.5,
Install New Main Printed Circuit Board.
6. After assembly, verify that the balance meets all specifications. (See Chapter 1.)
Perform all tests. (See Chapter 4.)
3.6.4 Load Cell Reassembly
– Precision Balances
Before re-assembly, take the following maintenance steps:
– Be sure all Flexures are straight, or replace them with new ones.
Place each Flexure on a clean flat surface and check that both sides rest evenly on the
surface. If a Flexure is bent even slightly, it must be replaced. (See Figure 3-23.)
– Be sure all parts are clean and free of debris.
1. Adjust the black Up/Down Stop Screw
so the Ratio Beam can clear.
2. Insert the Ratio Beam into the Load Cell
frame. (See Figure 3-64.)
3. Install the Service Fixture and Hanger to
the frame and the Ratio Beam. Hold the
Hanger by hand while inserting the two
screws that secure the Fixture to the
Hanger. Then insert the four screws
that secure the Fixture to the
Figure 3-64. Installing Ratio Beam,
clearing the Up/Down Stop Screw.
Load Cell frame and the Ratio Beam. (See Figures 3-66 and 3-67.)
