User's Manual

PINEAPPLE TECHNOLOGY, INC.
VTX2KW-A Operating and Service Manual
Page 45
IX — PROBLEM SOLVING/TROUBLE SHOOTING
IX — PROBLEM SOLVING
The VTX2KWA 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 field service on the transmit-
ter, most parts are available from Pineapple Technology Inc for next day shipment.
The failure analyzes of the transmitter starts off with the following assumptions:
A. The transmitter is connected to an AC Source which is within the specified voltage range and has
ample power to run the transmitter. This would normally be 208-240 V AC SINGLE PHASE with a
minimum of 60 Amps available.
B. The antenna has been checked out and verified 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 flow in or out of the building
E. The video and aural signals, to the Modulator, comply with stated specifications.
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 to high and the HS are over heating
b. High VSWR on PA output port will cause to Dump Load sensor to Fault.
c. Air filters 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 lost of power.
FAN FAULT indications could mean that the PA blower has failed or there has been a lost of AC power