CHAPTER 3 REPAIR PROCEDURES3.2 Load Cell Removal and DisassemblyThe Load Cell may need to be removed and repaired because of balance instability, or becausethe balance does not calibrate or repeat, or because the balance is physically broken ordisplays an error code. Possible causes include:• Parts being misaligned• Bent or broken Flexures• Contamination or debris in the Magnet area, or in any moving partNOTE: The Load Cell mechanism is extremely delicate, and must be handled verygently in a dust-free environment after it is removed from its protective housing.Prior to opening the Load Cell be sure to have the Service Toolset, Part No. 80030340,which includes a fixture that must be installed to protect the Flexures during bothdisassembly and assembly.NOTE: Always use an anti-static kit when opening the balance and handling itselectronic parts.3.2.1 Load Cell Removal1. Disassemble the Housing and open the balance. (Refer to Section 3.1.1.)2. Remove the 2 screws from the Display Cable Shield Plate and lift it aside.Display Cable Shield Plate screwsFigure 3-21. Removing Display Cable Shield Plate.3. Carefully move the Display Cable to the side. It does not need to be disconnected atthis time.Discovery Balance Service Manual 3-15 Ohaus Corporation www.ohaus.com
