10 000 WATT FM BROADCAST TRANSMITTER
FM10
Page 3-6
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
A5A1DS8
MD-6
♦
PA VDC FAIL
PWR SPLY F
When turned on indicates one of the following:
Output of the 'F' PA switching power supply is/was in
excess of 55 VDC.
Temperature of the 'F' 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 F circuit breaker to be tripped open.
Output of the 'F' 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 F circuit breaker has been set to OFF.
A5A1DS9
MD-6
♦
PWR PLY FAIL IPA
When turned on indicates one of the following:
Output of the IPA switching power supply:
- is/was in excess of 55 VDC.
- is/was too low for the IPA control voltage level
being applied to the control circuitry.
IPA circuit breaker has been set to OFF.
Latching circuit maintains turned on state of local
alarm LED when cause of alarm has been removed
and operation has returned to normal.
A high output voltage condition will cause the IPA
circuit breaker to be tripped open.
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