Battery Low Circuit Test - Multitone FLA 872 Technical Manual

TLA 852/FLA 872
PL401
8
14
Figure 5.4: Connections between Radio Board and Decoder Board
5.7.4 Battery-Low Circuit Test
To check the Battery-Low circuit:
a) Connect the variable DC power supply to the unit and set the output to
0.9 volts.
b) Switch ON the unit. The unit should go through the normal 'start-up'
procedure (beep and vibrate for one second and show the programmable
switch-on message for three seconds). After approximately two minutes the
low battery symbol will appear.
c) Switch OFF the unit but do not switch OFF or disconnect the variable DC
power supply. Set the output of the variable DC power supply to 1.2 volts.
d) Switch ON the unit. Make sure that the unit goes through the normal 'start-
up' procedure.
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7
GND
B+
VDD
AREA
ATTN
PGM
1
BEEP
BEC
38.4kHz
RESET
SDI
SDO
SCK
LOWBAT
SK1
8
7
1
14
TAG11336-1
TM1205 Issue 2