Maintenance
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4.3.3
Availability of the IDR IDO 3G.
The impact of a defective sub-assembly on the IDR IDO 3G availability is given
in Table 4.3.
FAILED SUB-ASSEMBLY
FUNCTIONAL CONSEQUENCES AND COMMENT
Magnetic base antenna
The IDR IDO 3G is in degraded service or out of service.
RF power divider
The IDR IDO 3G is out of service.
Synchronisation board
The IDR IDO 3G is out of service.
3G PA-TRX Module
The IDR IDO 3G is out of service.
Duplexer
• LNA function
The IDR IDO 3G is operational but has reduced reception
performance (reduced radio coverage).
• Duplexer function
The IDR IDO 3G is out of service.
• Insulator function
The IDR IDO 3G is out of service.
Fan plate
The IDR IDO 3G is operational but may have temperature
problems.
Such temperature problems may cause reduced transmission
performance (reduction in transmission power to 4 W or 1.5 W)
or shutting down of the IDR IDO 3G.
Converters
The IDR IDO 3G is out of service.
Fuses
General power supply to the IDR IDO 3G defective.
The IDR IDO 3G is out of service.
Table 4.3
CONSEQUENCES OF A FAILED SUB-ASSEMBLY ON THE AVAILABILITY OF THE
IDR IDO 3G
