Схема сотового телефона Other ERICSSON T18s, T18sc

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T18s, T18sc Standard Electrical Repairs
4/00021-2/FEA 209 544/12.B
1 Conditions
1.1 Component classifications.
After each component, which fault can be verified by the trouble-shooting instruc-tions in this folder, the classification of the component is written. The componentsare divided into four classes, A,B,C and D. The classes are seperated depending onhow much of the prestanda of the phone that is affected by replacing the component.
Class A and B:Replacing the component doesn?t affect the prestanda that much,
you only have to do a test call towards a real network before you per-form a function test after the exchange.
The phone has to be calibrated at station level after replacing the com-ponent, since the components tolerances are so large it can affect theprestanda of the phone.
It demands advanced equipment and calibration at board level andbecause of that class D-components won?t be replaced.