Page 15
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.
r
#1001: PROTECTION CIRCUIT DETECTS EXCESSIVE PA
The Power amplifier heatsink is overheated.
Reduce the drive power or shorten transmis-
sions to cooling the heatsink.
r
#1002: PROTECTION CIRCUIT DETECTS SWR > 3:1
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).
r
#1003: PROTECTION CIRCUIT DETECTS PA UNIT IMBALANCE
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.
r
#1004: PROTECTION CIRCUIT DETECTS EXCESSIVE DRIVE POWER
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.
r
#1005: PROTECTION CIRCUIT DETECTS EXCESSIVE PA DC VOLTAGE
The recommended Drain Voltage of the final
amplifier has been exceeded. Check the power
supply voltage regulator and associated cir-
cuitry.
r
#1006: PROTECTION CIRCUIT DETECTS EXCESSIVE PA CURRENT
The recommended Drain Current of the final
amplifier has been exceeded. Check the power
FETs and associated circuitry.
r
#1007: PROTECTION CIRCUIT DETECTS POWER SUPPLY FAILURE
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.
r
#1008: PROTECTION CIRCUIT DETECTS BAND SELECTION ERROR
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
AND
D
ATA
cable, or similar problem. The VL-
1000 is placed in the "Thru" mode automatically when this occurs.
WARNING Messages
