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Page Title: Table 3-1. Controls and Functions (cont)
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TM 11-5820-917-13
Table 3-1.
Controls and Functions - Continued
Control or
Fig.
ref.
indicator
Function
If the lamp remains lighted for five seconds after initiation
12.
RCVR
of test, indicates malfunction in synthesizer or receiver
indicator (red)
circuits (internal fault) or malfunction of one or more
power supplies.
When lighted, indicates receiver, synthesizer, and
RCVR
13.
power supplies, are fully operational. (Test may take
indicator (green)
up to five seconds to complete.)
Two lamps indicate standby battery condition. Lamps are
BATT
14.
indicator (green)
activated by circuitry that measures battery box terminal
voltage.
BATT
For the non-rechargeable battery supply (P/N 6025-1008) ,
15.
a test is performed with AC line power either on or off,
indicator (red)
battery switch (31) on, and TEST switch (11) pressed.
For the rechargeable battery supply (P/N 6025-1018) , the
AC line power must be off to conduct an accurate test.
However, if the rechargeable battery supply is in a low
charge condition, turning off AC line power can cause
loss of synchronization.  If operating in synchronization
with a transmitter, this test should be made with AC line
power on.  In this case for the rechargeable battery
supply, the green BATT lamp should always light unless
the supply is fully discharged or defective in which case
the red /green or red lamps will light. (Refer to para-
graphs 5-15 and 5-16 for test description.) For the non-
rechargeable supply, the following indications apply:
Green ON only = Batteries good (voltage greater than
q
23V) .
Red and green ON together = Batteries weak but still
q
operational - will need replacing soon.  (Voltage
between 18 and 23 volts) .
Red ON only = Battery condition unacceptable (voltage
q
less than 19 volts) ; indicates very weak or dead
batteries, or battery switch (13) is off.
Red and green both OFF = This condition occurs only
q
when the AC line power is off and the battery voltage
is less than 14 volts indicating that the battery switch
is off or the batteries are totally dead.
3-4


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