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