Routine Maintenance; Mtbf Estimates - Harris ZX2500 Technical Manual

ZX Series
5.2.7

Routine Maintenance

Routine maintenance of the ZX series transmitter consists of regular cleaning and the
monitoring of power, voltages, and current readings to detect of any deviations that
might indicate a developing problem.
To maximize equipment reliability and longevity, it is important to develop and stick to
a well designed maintenance routine. Table 5-1, contains a suggested maintenance
routine to follow. When indicated by (see procedure), a procedure to follow is provided
later in this section.
Table 5-1
Periodicity
Hourly to daily
Weekly
Monthly to semi-
annually
Annually
5.2.8
The solid state circuits in the ZX series transmitter do not require routine replacement.
Below are Mean Time Before Failure (MTBF) estimates for key subassemblies in the
ZX series transmitter.
MTBF of major components :
PA Modules = 600,000 hours approx.
Source: calculated from installed fleet
PS Modules = 200,000 hours approx. (including PS module fans)
Source: Lineage Power CAR1248 long form specification
Chassis fans = 90,000 hours approx.
Source: EBM PAPST
12/20/11
WARNING: Disconnect primary power prior to servicing.
Suggested Maintenance Routine
Log transmitter readings
Review readings and compare with baseline readings and/or factory
test data report to detect any deviations.
Inspect / replace air internal filter (see procedure)
Inspect / clean PA module heatsink fins (see procedure)
Periodic inspection and cleaning (see procedure)
Verify power meter calibrations (see procedure)
Verify reserve exciter and exciter switchover functionality
Verify external interlocks (station load temp sensor, patch panel
position switch, coax switch interlock, etc.)

MTBF Estimates

Section 5 Maintenance and Alignments
Task
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