10 000 WATT FM BROADCAST TRANSMITTER
FM10
Page 3-3
15 July 1997
Table 3-1 AC/DC Power Supply Controls and Indicators (Continued)
PANEL MARKING/
REF FIG NOMENCLATURE FUNCTION
DES NO. USED IN TEXT
A5A1DS1
MD-6
♦
RECTIFIER
TEMPERATURE
When turned on, indicates temperature of rectifier
assembly A2 and/or A3 is/was in excess of 90
°
C.
Latching circuit maintains turned on state of local
alarm LED when cause of alarm has been removed
and operation has returned to normal.
The above failure condition will cause all switching
power supply outputs to be inhibited thus inhibiting
transmitter RF output.
A5A1DS2
MD-6
♦
FAN FAIL
When turned on indicates one or more of the AC/DC
power supply's cooling fans has failed or is operating
at an unacceptably low speed.
A5A1DS3
MD-6
♦
PA VDC FAIL
PWR SPLY A
When turned on indicates one of the following:
Output of the 'A' PA switching power supply is/was in
excess of 55 VDC.
Temperature of the 'A' PA switching power supply's
heat sink is/was in excess of 98
°
C.
Any of the above failure conditions will cause the
PWR MDL A circuit breaker to be tripped open.
Output of the 'A' PA switching power supply is/was
too low for the control voltage level being applied to
the common control circuitry.
Latching circuit maintains turned on state of local
alarm LED when cause of alarm has been removed
and operation has returned to normal.
PWR MDL A circuit breaker has been set to OFF.
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