Technical Manual
PINEAPPLE TECHNOLOGY, INC.
UTX3KW-A Operating and Service Manual
Page 58
IX — PROBLEM SOLVING/TROUBLE SHOOTING
IX — PROBLEM SOLVING/TROUBLE SHOOTING
The UTX3KW-A is a complex assembly of Digital and Analog circuits and in many cases it is advisable
to contact Pineapple Technology, Inc. for assistance. If it is necessary to perform eld service on the
transmitter, most parts are available from Pineapple Technology, Inc. for next day shipment.
The failure analysis of the transmitter starts off with the following assumptions:
A. The transmitter is connected to an AC source which is within the specied voltage range and has
ample power to run the transmitter. This would normally be 208-230 V AC 3-phase with a minimum
of 75 Amps available.
B. The antenna has been checked out and veried to have a VSWR of 1.2:1 or better.
C. The room temperature is < 35 degrees Celsius.
D. There are no restrictions on the air ow in or out of the building.
E. The video and aural signals, to the Modulator, comply with stated specications.
CHECKING THE WARNING LIGHTS
MFA1KW: This unit has dual performance indicator lights located above the air inlets. One set of lights
for each PA assembly located inside the unit.
HS OVER TEMP GREEN NORMAL
RED FAULT
+28 VDC GREEN NORMAL
RED FAULT
FAN SUPPLY GREEN NORMAL
RED FAULT
HS OVER TEMP FAULT could indicate one of the following problems:
a. Room temperature is too high and the heat sinks are over heating
b. High VSWR on PA output port will cause the Dump-load sensor to fault.
c. Air lters are dirty and need to be cleaned.
d. Exhaust fan failure (located in the top of the rack).
+28 VDC FAULT could indicate a power supply failure. Check the ADP500 & PAS10 for PA voltage and
current readings. The power supply modules will also indicate a loss of power.
FAN FAULT indications could mean that the PA blower has failed or there has been a loss of AC power
to the fan. There is also a fuse located just inside of the front panel in case there is a locked rotor failure