B13 BETTER (B13 BEST APPEARANCE) WASHING MACHINE SERVICE HANDBOOK
73
9. COMPONENT OPERATION PRINCIPLES
9.1. Electronic Card Assembly
Picture 9.1 Electronic card assembly
9.2. Touchkey Technique
Picture 9.2 Panel
Touchkey helps determine presence/lack of an object.
Great majority of applications are based on electrical capacity measurement.
For this reason, any object touched to the key section must have minimum conductivity.
(E.g.: It does not operate with plastic.)
Material used as sensor must touch the sensor surface. There should not be any visible gap
in between. (E.g.: Care should be paid during installation.)
Electronic card assembly consists of
main board, indicator card, card holder
parts, socket holders and intermediate
cable.
On the indicator card are; "LED
MODULE", springs that ensure 'encoder'
used for programme selection and
springs that provide 'touch' control.
Washing programmes, wash and spin
motor profiles, protection algorithms and
components (motor, heater, pump,
valves, door safety lock, ntc, water level
key selection switch, spin/temperature
selection potentiometer, water counter)
on the microprocessor located on the
main board are controlled.
On
Off
Button
Programme
Selection
Spin Speed
Button
Auxilliary
Function Buttons
Start/Pause
Button
Delay
Time
Button
Temperature
Button
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