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Nokia 616 Service Manual Page 162

Carkit phone (tfe-4/rv-1).
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TFE-4/RV-1
TF5 Technical Information
BSI-Switch
The BSI-Resistor may only be connected to
Ground when VCAR is in the correct range
(Powerok = active). This is the task of the
BSI-switch.
Description of the Audio Block
Block Diagram of the Audio Block
HFMIC
HFSPKR
B2BHDMIC_p
B2BHDMIC_n
HDEAR
Page 8a-22
Company Confidential
Figure 16: IGNS Levelshifter realization
VMIC
VBIAS
VBIAS
HFMIC
HFAUDIO
HFSPKR
HDMIC
HDAUDIO
HDSPKR
Figure 18: Block Diagram of Audio-Block
Copyright © 2005 Nokia Corporation.
Company Confidential
Nokia Customer Care
Figure 17: BSI switch
VEBpwr
VAUIDIO10V
HFMute
Levelshifter
HDMute
Levelshifter
B2BIGN
S
B2BHFMIC_p
B2BHFMIC_n
F
I
L
B2BXEAR_p
T
B2BXEAR_n
E
R
B2BHFMUTE
B2BHDMIC_p
B2BHDMIC_n
B2BHDMUTE
Issue 2.0 Mar/2005

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