Technical Manual

PINEAPPLE TECHNOLOGY, INC.
UTX5KW-A Operating and Service Manual
Page 56
IX — PROBLEM SOLVING/TROUBLE SHOOTING
IX — PROBLEM SOLVING
The UTX5KW-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 specied 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 veried 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 specications.
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 is 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 to 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.