Ericsson T18s Trouble-Shooting Instruction page 16

• If there's voltage at any of the regulators, replace the corresponding regulator
(VDIG – N702, VRAD – N480, VVCO – N470, VCORE – N700, all four of
class A).
• If there's voltage at all of the regulators, measure the voltage at pin 1 of V702
(~0V, fig. 3.4).
* If the voltage is correct, send the phone to Advanced electrical repairs.
* If the voltage is incorrect there's probably a short circuit at the On/Off key-
pads. It's almost always crumbs from the dome foil that causes it. Clean it
away using alcohol and a brush.
If the fault remains, send the phone to Advanced electrical repairs.
4/00021-2/FEA 209 544/12.B
T18s, T18sc Standard Electrical Repairs
Fig. 3.4
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