Warning Messages - Yaesu VL-1000 Operating Manual

If one of these messages should appear, a potentially serious situation is being experienced.
Turn the amplifier off, correct the problem, then turn the amplifier back on. If the problem has,
indeed, been corrected, full operation at the 1000 Watt power level should be restored.
The Power amplifier heatsink is overheated.
Reduce the drive power or shorten transmis-
sions to cooling the heatsink.
The SWR is too high (above 3:1). Check the
a n t e n n a , f e e d l i n e , a n d c o a x i a l c a b l e
connector(s).
More than 50 watts of imbalance has occurred
among the four sections of the power ampli-
fier. A transistor or LPF Unit power combiner
failure may be responsible.
The recommended drive level from the exciter
(transceiver) has been exceeded. Reduce the
drive level or set the ATT switch to the ON po-
sition.
The recommended Drain Voltage of the final
amplifier has been exceeded. Check the power
supply voltage regulator and associated cir-
cuitry.
The recommended Drain Current of the final
amplifier has been exceeded. Check the power
FETs and associated circuitry.
The VP-1000 or its interconnection to the VL-
1000 has failed. Check the cable connection
from the VL-1000 and/or the VP-1000. This
Warning only appears when using the Yaesu
VP-1000 power supply unit.
The VL-1000 and the transceiver are set up
with conflicting band selection, due to a logic
error in the Band Data matrix, a failure in the
B D cable, or similar problem. The VL-
AND ATA
1000 is placed in the "Thru" mode automatically when this occurs.
VL-1000 Operating Manual

WARNING Messages

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