SH888, S868, Standare Electrical Repair
4/00021-2/FEA 209 544/3.D
3
(66)
1 Conditions
1.1 Component classifications.
All the components in the phone are divided into classes and after every component
in 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 when
replacing 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 the
phone is only slightly affected.
Class C:
Since the tolerances of the component are so great it can substantially
affect the performance of the phone you need to calibrate it at station
level.
Class D:
Class D components need to be calibrated at station level using
advanced 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