Pineapple Technology Inc. UTX3KW Benutzerhandbuch

 

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 field 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 specified 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 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.

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 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 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