User's Manual

PINEAPPLE TECHNOLOGY, INC.
UT X1K W-A Ope rating a nd Se rvic e Ma nua l
Page 53
IX — PROBLEM SOLV ING/T ROU BLE SH OOTING
IX — PROBLEM SOLV ING/T ROU BLE SH OOTING
The UTX1KW-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 fi 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 specifi ed voltage range and has
ample power to run the transmitter. This would normally be 208-240 V AC with a minimum of
30 Amps available.
B. The antenna has been checked out and verifi 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 fl ow in or out of the building
E. The video and aural signals to the Modulator, comply with stated specifi cations.
CHECKING THE WARNING LIGHTS
A. 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 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 fi 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 ADP1000 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 condition. To access the fuse, the MFA1KW must be removed from the rack and the top cover
removed. This is a 5 AMP 3 AG type fuse.