Replacing The Rear Display Pcb; Removing/Replacing The Load Cell - OHAUS Valor 2000 Service Manual

CHAPTER 3 MAINTENANCE PROCEDURES
3.5

Replacing the Rear Display PCB

First be sure the eight screws securing the PCB Cover have been removed and that the cable
plug has been lifted out. Then proceed as follows:
1. Pull the white Cable Tab that connects the Rear PCB to the Main PCB.
2. Remove the two screws that hold the PCB in place.
3. Lift out the PCB and position its replacement over the screw holes in the housing.
Insert the four screws and tighten them.
4. Re-seat the white plastic Cable Tab connecting the Main PCB to the Rear Display PCB.
5. Position the PCB Cover over the screw holes, insert the four screws and tighten them.
6. Re-insert the Cable Plugs in the PCB Cover.
3.6

Removing/Replacing the Load Cell

The Load Cell may need to be replaced because of balance instability, or because the balance
does not calibrate or repeat, or because it is physically broken or displays an error code.
Note: There is no need to disassemble the Load Cell. It is supplied as an assembled
unit. (See Chapter 5 for parts information.)
1. Remove the two bolts in the Top Housing that secure the Load Cell.
2. Be sure the six screws securing the Load Cell Cover have been removed and that
the Cable Plugs have been lifted out.
3. Gently lift the Load Cell away from the housing.
4. If the Load Cell is to be replaced, or the off-center load adjusted, unsolder the Load
Cell Cable from the Main PCB, in order to completely remove the Load Cell from the
housing.
5. When installing the replacement Load Cell, first insert and tighten the two bolts in the
Top Housing. Then re-solder the Load Cell Cable to the Main PCB. Then insert and
tighten the six screws that secure the Load Cell Cover.
Note: There is no need to remove the bolts in the metal bracket surrounding the Load
Cell, unless it is necessary to adjust the Up/Down Stops.
Ohaus Corporation www.ohaus.com 3-4 Valor™ 2000 Series Service Manual