Ericsson T18s Trouble-Shooting Instruction page 48

Check the soldering at D600:1,120,122-128 (Fig. 8.3).
If the voltage is incorrect for a complete row (e.g. 1,2,3), measure the resistance
from the marked side (Fig. 8.2) of the pads of that row to D600 (In this case
D600:125). The resistance should be ~0 Ohm.
CORRECT: Replace D600 (class B).
INCORRECT: There is a foil damage and the board has to be discarded.
If one column or a part of it are faulty, check the soldering at D600:1 and D600:120-
128.
• If all soldering are correct, replace D600 (class B).
8.5 The active flip function doesn´t work.
Open the phone and check for liquid damages.
Measure the voltage on the marked side of S15 (3.2 V, Fig. 8.1).
Check if the keys [CLR] and [6] are working.
• If any of them doesn´t, return to section 8.4.
• If the keys [CLR] and [6] are working, replace S15 (class A).
* If the fault still remains, send the phone to Advanced electrical repairs.
4/00021-2/FEA 209 544/12.B
T18s, T18sc Standard Electrical Repairs
Fig. 8.3.
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