Multitone FLA 872, Technical Manual

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14 1
PL401 SK1
LOWBAT
SCK
SDO
RESET
BEC
7 7
TAG11336-1
38.4kHz
SDI
BEEP
PGM
ATTN
VDD
GND
B+
AREA
1
8
14
8
TLA 852/FLA 872
TM1205 Issue 2 Page 5 - 10
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.