TM 11-5840-281-12-1
4-34. DESCRIPTION OF MAINTENANCE CONTROLS, INDICATORS, AND SWITCHES. (CONT)
KEY
CONTROL OR INDICATOR
DESCRIPTION
3
POWER SUPPLY CURRENT
Indicates current drain of high-voltage power supply.
meter
4
MAGNETRON CURRENT meter
Indicates average magnetron current.
5
HV OFF switch
When depressed, removes control voltage that turns off
high-voltage power supply.
6
HV ON-HV READY indicator
Two-position indicator switch indicates high-voltage
switch
power supply is in standby (HV READY) or is trans-
mitting (HV ON). When switch is depressed, appropriate
section will light.
7
PULSE SELECT WIDE/NAR
Two-position indicator switch indicates wide pulse or
indicator switch
narrow pulse mode of local operation when applicable
section is depressed.
8
OVLD RESET indicator
Switch is lit when overload is present in transmitter.
switch
When depressed, resets all overloads in transmitter.
9
CONTROL LOCAUREMOTE
Two-position indicator switch allows local (transmitter
indicator switch
site) or remote (control-indicator site) operation of
transmitter, when appropriate section is depressed.
10
MODULE NO. 1 CURRENT
Two-section fault indicator that monitors performance
OVLD-TIMING OVLD
of three modular boards. CURRENT OVLD lights when an
indicator
excessive modular current is present. TIMING OVLD lights
when a modular trigger is missing.
11
MODULE NO. 2 CURRENT
Same as MODULE NO. 1 CURRENT OVLD-TIMING OVLD
OLVD-TIMING OVLD
indicator.
indicator
12
MODULE NO. 3 CURRENT
Same as MODULE NO. 1 CURRENT OVLD-TIMING OVLD
OVLD-TIMING OVLD
indicator.
indicator
13
MODULE NO. 3 SCR SHORT
Same as MODULE NO. 1 SCR SHORT indicator.
indicator
14
MODULE NO. 2 SCR SHORT
Same as MODULE NO. 1 SCR SHORT indicator.
indicator
15
MODULE NO. 1 SCR SHORT
Lights when scr on modular board shorts or when no pulse
indicator
forming network (PFN) voltage is detected during PFN
charging time.
4-127
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