Схема сотового телефона Other ERICSSON SH 888/S 868

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SH888, S868, Standare Electrical Repair
4/00021-2/FEA 209 544/3.D
1 Conditions
1.1 Component classifications.
All the components in the phone are divided into classes and after every componentin the troubleshooting guide you have a class written. The classification of the com-ponent depends on how much of the phone's performance that's affected whenreplacing it. The classes are:
Class A and B: A test call towards the "real" net (not only a GSM test instrument)
is enough to verify the functionality since the performance of thephone is only slightly affected.
Since the tolerances of the component are so great it can substantiallyaffect the performance of the phone you need to calibrate it at stationlevel.
Class D components need to be calibrated at station level usingadvanced equipment and can therefore not be replaced.
1.2 Updates.
At board made in weeks 20-22 of 1998 you'll have to replace L540 (class A,fig.1.1).
Fig. 1.1