Components; Operating And Power Modules - Bosch SHP65TL5UC Repair Instructions

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COMPONENTS

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4.1

Operating and power modules

4.1.1 Descriptions
Dishwashers have two control modules, an operating module
(with display, lights & buttons) in the fascia (control) panel and a
power module in the base on the right side. The power module
controls the BLDC drain and heat pumps.
1. Operating module (in fascia panel).
2. Power module (in base).
The wire harness connected to the control module is a separate
harness.
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4.1.2 Capa-Touch (Series 500/800)
Series 500 / 800 operating modules don't have physical buttons,
using Capa-Touch (capacitive touch) buttons.
There are 14 buttons, with a sensor underneath each one. The
capacitance over each button sensor is calibrated to the fascia
panel.
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Fascia panels use "dielectric" plastics, which do not conduct
electricity, but become polarized in an electric field. Positive ("+")
charges move toward the field and negative ("-") charges move
away from the field, making fascia panels store charges like
plates of a capacitor.
Human fingers have an innate capacitance, which change the
button capacitance. When a finger touches a button, the sensor
senses a larger capacitance, measured by the control.
• The capacitance is affected by fascia panel trim, printing,
thickness and materials. To insure a consistent response,
each operating module has software programmed to
adjust to it's panel.
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1. Fascia panel
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2. Button cover
3. Module housing
4. Sensor coupling
5. PC board
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