TFE-4/RV-1 Company Confidential
TF5 Technical Information Nokia Customer Care
Page 8a-12 Copyright © 2005 Nokia Corporation. Issue 2.0 Mar/2005
Company Confidential
Description of the Blocks
Power supply
Blockdiagram of Power supply
Figure 4: Block diagram of Power Supply-Block
Description of Inputs, Outputs and Block-Internal Lines
Signalname Description Range When Error then .......
Inputs
VCAR Protected Carbattery
Voltage coming from Car-
connector
Defined:
5V..20V
Operating:
9..15V
Whole unit will not work
FlashIMEI Signal for Production Test
to increase Engine Power
for IMEI flashing
0..1V low
10..14V high
IMEI Flashing will fail on Final-
Test (when always low)
Or VEBPWR will be too high
(when always high)
SMPSON Signal from Powercontrol
block that switches the
Powersupplies for active
Powermode
Low: (Sleep-
mode) 0..1V
high (active
mode): 4..5V
Unit will not wakeup (when
always low)
Or Sleepmode current will be too
high (when always high)
B2BHDMUTE HD-Mode control signal High: 1.6..18V
Low: 0..0.5V
Here: VMIC will always be
switched on (Sleepmode current
too high) (when always high)
Or always off (when always low)
B2BHFMUTE HF-Mode control signal High: 1.6..18V
Low: 0..0.5V
Here: VMIC will always be
switched on (Sleepmode current
too high) (when always high)
Or always off (when always low)
VWAKE
VEBPWR
VAUDIO
Flash IMEI
VCAR VEBPWR
VIDU
B2BUIPOWERON
SMPSON
OCP
VAUDIO
VWAKE
VMIC
B2BHDMUTEX
B2BHFMUTEX
VCARSW
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