Power Save; Power Supply - Tait TB8100 Service Manual

17.3

Power Save

17.4

Power Supply

Standard, Dual Base
Station, and Power
Save
Multi-reciter
TB8100 Service Manual
© Tait Electronics Limited September 2006
This circuitry is present only on the Power Save control panel board.
When the base station enters Power Save mode, the control panel will shut
down after receiving the appropriate I
power LED flashes once every two seconds to indicate the base station is in
Power Save mode.
The control panel will power up again when it receives a signal on the
RS-232 system control bus or serial port.
The control panel operates off a 28V (nominal) power supply provided by
the reciter. The power supply for the cooling fans mounted on the front
panel is fed through the control panel.
The control panel is powered from the subrack interconnect board. 28VDC
is supplied to the subrack board from the PMU (if fitted). If no PMU is
fitted, 10.5VDC to 32VDC is supplied to the subrack board from the DC
input connector at the rear of the subrack. The power supply for the cooling
fan (if fitted) mounted on the front panel is fed through the control panel.
2
C bus message from the reciter. The
Control Panel Circuit Description 273