A1018s/A1018sc Standard Electrical Repair
4/00021-2/FEA 209 544/16.B 3 (42)
1 Conditions
1.1 Component classes.
All the components of the board are divided into four classes: A, B, C and D. The
class of the component depends on how much of the performance of the phone is
affected when replacing it.
Class A and B: A test call towards the real network (not only towards a GSM test
instrument) and run it through the normal tests 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 after
replacing the component.
Class D: Class D components need to be calibrated at board level using advanced
equipment and may therefore not be replaced.
To Next Page
Loading...
