12
2.3.8. Replacing the Unit ASSY (1)
1) Use the procedures in "2.2 Inspecting the Balance Interior" to remove as far as the unit cover (B5).
2) Loosen the screw P4 M4 × 8 (2 screws) and flat washer M5 (2 locations), remove the weight stopper (W3),
and remove the weight.
3) Insert the lever fixing pin (J1) into the lever fixing hole on the top of the OPF.
* Lift up on the lever ASSY (U7) to insert the pin. Proceed carefully to avoid scratching the elastic
support.
4) Remove the connector inserted into the detector ASSY (U11). (1 location)
* When removing, use caution to ensure that it does not come into contact with the lever ASSY
(U7) and scratch the elastic support.
5) Stand the back of the base ASSY (B1) on the floor, loosen the bolt P3 M5 × 12 (3 bolts) on the bottom of
the base ASSY (B1), and remove the unit ASSY (1).
Fig. 2-22
6) After setting the new unit ASSY (1), use the bolt P3 M5 × 12 (3 bolts) on the bottom of the base ASSY (B1)
to temporarily fix the unit ASSY (1), then use the unit ASSY positioning pin (J2) and plate (J8) to adjust the
position, and tighten. (35 kgf
·
cm)
* When lifting up on the new unit ASSY (1), do not hold it by the parallel guide and movable pillar
part.
* When setting the unit ASSY positioning jig (J2), be careful to avoid damaging the unit ASSY (1).
Fig. 2-23
7) See 2.3.7 to mount the weight loader ASSY (27).
* Mount the weight loader ASSY (27) on cell width of the unit ASSY (1) in the balance left and right
directions.
* Be careful to avoid letting the weight loader mechanism come into contact with the lever.
8) Check repeatability and cornerload error, and then perform linearity, calibration of internal weight (ATX
series only), and sensitivity adjustment. (See "4.4 Adjusting the Cornerload Error," "5.5 Linearity
Adjustment," "5.6 Internal Weight Calibration (PCAL)," and "5.7 Sensitivity Calibration.")
9) Use the above procedures 1) to 4) in reverse to restore the original state.
* Input the attached EEPROM data to the balance. Temperature Coefficients at Address Numbers
004 to 05A.
Bolt (3 bolts)
Unit ASSY positioning jig
