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Nokia 616 Service Manual Page 159

Carkit phone (tfe-4/rv-1).
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Signalname
SMPSon
Signal from Powercontrol
block that switches the
Powersupplies for active
Powermode
B2BPOWERONX Reset signal that is toggled
by the POWEROX block dur-
ing startup
POWEROK
Output signal of the VCAR-
Check Block
IGNS5V
To 5V Logic level translated
Ignition Signal
B2BIGNS
To 1.8V Logic level translated
Ignition Signal
BSI
Opendrain Output which
switches 47kR load to
Ground when Powerok is
active
Issue 2.0 Mar/2005
Company Confidential
Description
Outputs
Copyright © 2005 Nokia Corporation.
Company Confidential
TF5 Technical Information
Range
When Error then .......
Low: (sleepmode)
Unit will not wakeup (when
0..1V
always low)
high (active
or Sleepmode current will be
mode):
too high
4..5V
(when always high)
Opendrain out-
Phone-Engine will not
put (with exter-
wakeup (when always low or
nal pull-up to
always high)
2.7V):
Active : 0V
inactive: 2.7V
4..5V if VCAR is
Unit will not wakeup (when
within operating
always low)
range (9..15V),
or SMPSon will not be deac-
0..1V when VCAR
tivated if VCAR is out of
is out of range
range
(when always high)
0V when Sense =
Unit will not wakeup (when
off, else
always low)
5V 5%
or SMPSon will not be deac-
tivated
(when always high)
0V when Sense =
Phoneunit will malfunction
off, else
1.6..1.8V
0V when Pow-
Phoneunit will malfunction
erok, else
(SIM cannot be read), Phone
high impedance
always in Localmode
TFE-4/RV-1
Page 8a-19

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Troubleshooting

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