User's Manual
PINEAPPLE TECHNOLOGY, INC.
UTX2K ULTRA Operating and Service Manual
IX -- PROBLEM SOLVING/TROUBLE SHOOTING
IX - PROBLEM SOLVING & TROUBLE SHOOTING (Page 3 of 3)
PA1 - PA5 LED's are RED This will indicate that the PA Pallet currents are below the 500 m
a
set point. This can occur when the PA Power device has failed.
CHECK 1: Select the PA device in question for current displa
y
on the multi-meter. Compare the reading to the station log. I
f
abnormal, it is possible that a power transistor has failed.
NOTICE: PA5 will go RED when the INHIBIT SWITCH is
actuated.
CHECK2: To confirm a failed device, it is necessary to shutdown
the transmitter and remove the PA1K power amplifier assembly
and check the device in question. Use a VOM to check the
resistance from the gate of each 1/2 of the device to ground. If
either reading is below 1K ohm it is likely that the device ha
s
failed.
POWER SUPPLY MODULE LED RED
The Power Supply Module has two warning LED's located on the front panel. Normally these LED's ar
e
GREEN indicating that the AC Line voltage and the OVER VOLTAGE circuits are operating properly
.
If either LED turns RED the module is question will be turned off and is no longer supplying powe
r
to the transmitter. These modules are "HOT PLUGGABLE" and can be removed from active service
by simply removing it from the main frame. Pineapple Technology, Inc. does not recommend an
y
attempt to service these modules. Any attempt to service may void factory warranties. Return th
e
module to Pineapple Technology, Inc. or to the manufacture for service.
NOTICE: If it becomes necessary to operate the transmitter with a missing supply module, ver
y
little if any performance degrading will be experienced. Check the AUX volt meter for any indicatio
n
of a drop in voltage (normally 32 VDC). This drop is caused by the power supply modules going int
o
"CURRENT LIMIT". It is important that the voltage be around 32 volts ±0.5. If the voltage falls belo
w
this point, it can be recovered by reducing the RF Drive level a small amount in most cases. This
should be done only with the DUMP LOAD MONITOR on and indicating that the maximum powe
r
is not exceeded.
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