Multitone RPR 563, Инструкция по изменению

Страница: 59 / 116

RPR 563
TM1195 Issue 1 Page 5 - 9
15. The location of test points are shown in Figure 5.
`Low Battery' Circuit Test
16. The `Low Battery' option must be enabled in the EEPROM if operation of this circuit is
to be checked. The procedure for checking operation is as follows:
a) Remove the case back and Radio Board. Connect the Radio Board to the Decoder
Board using the interconnect lead.
b) Connect a variable DC supply to the Decoder Board via the red and brown wires on
the interconnector. Set the power supply voltage to 2.6V DC.
c) Switch on. The transceiver should initiate its switch-on procedure. A `Low Battery'
warning buzz should sound instead of a beep, as follows:
I) Quiet Tone (modulated by `Low Battery' buzz).
ii) Alert Lamp.
iii) Show all LCD segments.
iv) Display Receiver Address.
v) Display Switch-on Message.
vi) Display message `BAT'.
d) Press the Memory Recall button and check that the message `Low Battery' is
displayed. If the transceiver is called, the beep pattern changes to a buzz.
e) Switch off the transceiver. Increase the power supply output to 3.2V DC.
f) Switch on the transceiver and check that the normal switch-on sequence occurs.