List Of Modules; Operation; Supply Voltage And Power Consumption - Nokia NSE–3 SERIES Service Manual

HFU–2

List of Modules

Name of module
HF unit
HF module
Assembly parts

Operation

Phone not connected (sleep mode):
Phone connected (active mode):

Supply Voltage and Power Consumption

Conn. / pin Line Symbol
X300 / 6 GND
X300 / 1 VB
X300 / 1 VB
X300 / 1 VB
X300 / 1 VB
Page 4
Type code Material
code
HFU–2 0694049 Advanced handsfree unit
ED2 0200948 ED2 Advanced hadsfree module
MHFU–2 0261602 Mechanical Parts
When the phone is not connected the current consumption of
the device has been minimized. The switching mode power
supply (SMPS) and audio circuits has been turned off. HFU–2
is only waiting a phone to be connected.
When the phone is connected to the HFU–2 it goes into the ac-
tive mode. In the active mode the device provides charging
current to the phone. It also can provide hands free call option
using the external speaker and the external microphone or
micspeaker unit. If more private call wants to be made, the
phone itself can be used as a handset without losing the exter-
nal antenna connection or with handset (option).
The phone controls all functions of HFU–2. In the active mode
the HFU–2 sends all state transitions to phone via mbus.
HFU–2 also provides car radio mute function during call.
HFU–2 can control the mobile antenna motor if it is installed to
the car.
Minimum
8.0
10.8
0.05
0.2
Technical Documentation
Notes
Typical / Maximum
Nominal
0
16
13.5 16
1 2
0.8 1
PAMS
Unit / Notes
VDC
VDC (working)
VDC (spec. fulfill)
IDC/A (operating)
IDC/mA (sleep
mode)
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