Technical Manual
PINEAPPLE TECHNOLOGY, INC.
UTX5KW-A Operating and Service Manual
L. BPU5KW UHF BAND PASS FILTER
This Band Pass lter was designed to meet FCC Certication requirements with minimum loss of RF
Power. The BPU5KW comes tuned and tested to the operating frequency of the transmitter and should
not be adjusted without proper equipment. Replacement lters are available as P/N BPU5KW UHF
(+CHANNEL NUMBER).
M. AUX5 MONITOR PANEL
The auxiliary monitor panel provides analog meter measurements for the primary DC supply. The total
power supply current and voltage are displayed on these meters. These measurements serve as a good
indication of the operations of the transmitter nal power ampliers.
Each power supply has a current monitor output. These outputs are accessible on the AUX5 Front panel.
Each ( PS I SHARE ) test point will indicate a relative amount of current being supplied from the power
supply. This is not a calibrated or accurate measurement that is scaled from the current capability of the
power supply. This is also a second-level diagnostic tool for use by qualied technicians.
In the event of an EMERGENCY, a SHUTDOWN SWITCH located on the AUX5 will shut down the
transmitter and remove all power starting from the MAIN 3-P BREAKER. To turn the transmitter on,
it is necessary to RECYCLE the SHUTDOWN SWITCH before the transmitter MAIN BREAKER can
be turned on.
N. FP-10 FUSE AND SHUNT PANEL
The FP-10 serves as a DC SUMMING POINT for all current coming from the power supplies. After being
summed the current passes through a 500 AMP precision shunt which is used for measuring the total
supply current and voltage being applied to the transmitter power ampliers. At this point, the DC Power
is distributed to each U600LDV-2 amplier assembly thru a series 80 amp fuse.
NOTICE: BEFORE ANY SERVICE WORK IS PERFORMED ON THE FP-10 ALL POWER TO
THE TRANSMITTER MUST BE TURNED OFF FOR SAFETY.
V — THEORY OF OPERATION
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