Ericsson T18s Trouble-Shooting Instruction page 23

T18s, T18sc Standard Electrical Repairs
Fig. 4.1
Check the solderings of N800 (fig. 4.2)
Measure the resistance from one of the J810 pins to the other (~14 kohms, fig. 4.1).
• If the resistance is too low, replace C842 (class A, fig. 4.1).
Measure the resistance from each of the J810 pins to ground (>1 Mohms).
• If any of the resistances are too high, replace C840 and C841 (class A, fig. 4.1)
If the fault remains, send the phone to Advanced electrical repairs.
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