User's Manual

PINEAPPLE TECHNOLOGY, INC.
UT X1K W-A Ope rating a nd Se rvic e Ma nua l
Page 54
IX — PROBLEM SOLV ING/T ROU BLE SH OOTING
B. ADP1000: There are a number of fault indicator lights on this unit that can be used for trouble
shooting possible problems with the transmitter.
With normal operating conditions, all the LEDs located on the front panel should be green. Red
lights could indicate a fault in normal operations of the transmitter. Fault indicators are listed
below;
1. ANT VSWR HIGH light is RED. This indicates that the antenna refl ected power exceeds the
set point in the equipment which is normally set to 25%. When this LED is on, the transmitter
shutdown line is pulled down to ZERO and the transmitter RF PWR OFF LED will also light
RED indicating that the transmitter has been shutdown at the driver level. This condition will
automatically reset when the problem is corrected. CHECK THE ANTENNA FOR POSSIBLE
FAULTS.
2. RF PWR OFF light is RED. This will occur anytime the “SHUTDOWN LINE” is pulled to
ZERO. This control line is pulled to ZERO with any of the following faults:
a. ANT VSWR HIGH
b. PA INHIBIT SWITCH IN THE INHIBIT MODE
NOTICE: ONLY THE PA INHIBIT SWITCH OR THE ANT VSWR HIGH WILL SHUT-
DOWN THE TRANSMITTER DRIVE CAUSING THE RF OUTPUT TO FALL TO NEAR
ZERO.
3. PA1 THROUGH PA5 LEDs RED would indicate that the PA Pallet current level has fallen
below the set point and could indicate a transistor failure. The normal current with the “inhibit”
switch activated is 500 ma.
C. RR6000 POWER SUPPLY MODULES: The Power Supply module has two warning lights located
on the front panel. Normally these lights are GREEN indicating that the AC Line voltage and the
Over Voltage circuits are within their normal range. Should either one go out of range, the lights
will turn RED and the power supply module will shutdown. This will reduce the available power
to the RF Stages and could result in lower RF Output Power from the transmitter. If this happens,
turn off the transmitter for about 1 minute and then turn it back on. If this warning continues, the
module should be removed from the rack and returned for service and a spare module should be
installed to maintain normal operations.
NOTICE: Normally removing one power supply module will result in a reduction of output power
if the spare module is not installed. To continue operating the transmitter the RF Drive level will
have to be reduced to a level where the working supply can carry the load of two PA Assemblies.
Reduce the RF drive level to a point where the power supply voltage meter is reading approximately
31 VDC. If the RF drive level is too high, this will cause the power supply to go into current
limit and the voltage reading will drop. The RF Output power of the transmitter will be reduced