Ericsson T18s Trouble-Shooting Instruction page 27

T18s, T18sc Standard Electrical Repairs
Check the VDIG voltage at the marked sides of R635 and R636 (~3.2V, fig. 4.1).
• If VDIG is missing at R635 and R636 but is at pin 5 of N702 there's a foil dam-
age and the phone is to be discarded.
• If the voltage is correct, check the solderings at N800 and D600 (fig. 4.2).
Fig. 4.4
If the fault remains, send the phone to Advanced electrical repairs.
4.5 Handsfree microphone out of order.
The fault occurs when there's an interrupt in the audiopath between the handsfree
microphone (connected through the system connector) and the N800. The audio
path is shown in fig. 4.5.
Fig. 4.5
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