Electrolux 7 Series Service Manual page 55

11.8 Shock absorber with weight sensor (where featured)
11.8.1 General characteristics
1. Plunger
2. Weight sensor
3. Piston
1. Main circuit board
6. Weight sensor
1. Plunger
2. Oscillating Coil
3. PCB
4. Spring
5. Piston
The weight sensor incorporated into the shock absorber is made up of an oscillator (which generates
a frequency) consisting of the circuit board (3) and coil (2).
If there is no laundry in the drum when the appliance is turned on, the position of the piston
compared to the plunger is considered as the zero value (fig. A).
When laundry is placed in the drum, this causes the washing unit to be lowered, with the
consequent compression of the shock absorber (fig. B); the movement of the piston inside
the plunger changes the inductance of the coil, and consequently changes the frequency,
which is processed by the circuit board and communicated to the display board and the
LCD displays the weight of the laundry in kg.
If there is laundry in the drum when the appliance is turned on, the position of the piston is different
from when the drum is empty, moving the zero value and offsetting the final measurement.
2010 dmm
2
1
55/96
2
1
3
4
3
5
Fig. A
Fig. B
599 73 68-54