Nokia 6020b Service Manual
RM-31
Nokia Customer Care
7 - System Module
22
COMPANY CONFIDENTIAL
Issue 1 03/2005
Copyright © 2005 Nokia. All Rights Reserved.
Figure 5:Internal microphone connection
Internal speaker
The internal earpiece is a dynamic earpiece with an impedance of 32 ohms. The earpiece is
low impedance one since the sound pressure is to be generated using current and not voltage
as the supply voltage is restricted to 2.7V. The earpiece is driven directly by the UEMEK and
the earpiece driver (EARP & EARN outputs) is a fully differential bridge amplifier with 6 dB gain.
low impedance one since the sound pressure is to be generated using current and not voltage
as the supply voltage is restricted to 2.7V. The earpiece is driven directly by the UEMEK and
the earpiece driver (EARP & EARN outputs) is a fully differential bridge amplifier with 6 dB gain.
Figure 6:Speaker connection