Figure 63 Imaging HWA block diagramUser interfaceResistive touch screenProximity sensorThe proximity sensor is used to turn off the touch input, when the phone is against user’s ear during call.This prevents accidental touch signals that could happen when, for example, user’s cheek touches the phone.The main parts of the proximity sensor subsystem are:• Proximity sensor• Proximity boot (mechanical part)Figure 64 Proximity sensor and bootThe proximity sensor is located on the upper flex assembly.RM-356System Module and User InterfaceIssue 1 COMPANY CONFIDENTIAL Page 6 –23Copyright © 2008 Nokia. All rights reserved.