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T18s, T18sc Standard Electrical Repairs
Approved according to 1776-2/FEA 209 544
Trouble-shooting
instruction
T18s, T18sc
Standard electrical repairs
4/00021-2/FEA 209 544/12.B
T18s, T18sc Standard Electrical Repairs
Table of contents
1 Conditions .......................................................................................... 3
2 No SERV/Not able to connect calls. ............................................... 6
3 Doesn't start. ................................................................................... 12
4 Audio. ............................................................................................... 21
5 Display. ............................................................................................ 30
6 Charging fault ................................................................................. 34
7 SIM fault ("Insert card") ............................................................... 38
8 Keyboard ......................................................................................... 45
9 Illumination, buzzer and vibrator. ................................................ 48
10 RTC .................................................................................................. 57
11 Component list ................................................................................ 59
4/00021-2/FEA 209 544/12.B 2 (60)
T18s, T18sc Standard Electrical Repairs
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 components
are divided into four classes, A,B,C and D. The classes are seperated depending on
how much of the prestanda of the phone that is affected by replacing the component.
Class A and B:Replacing the component doesn