A1018s/A1018sc Standard Electrical Repair
4/00021-2/FEA 209 544/16.B
11
(42)
Give the board power and make sure VBATT exists at the marked side of the On/Off
button (fig. 3.5). If VBATT doesn´t exist, is there a foil damage and the board has to
be discarded.
Fig. 3.5
Make sure R703 (4.7 kOhm) and R704 (0 Ohm, both fig. 3.3) is correctly mounted
and has got the correct resistance.
Give the board power again. Keep the On/Off button pressed and measure the volt-
age at V702:3 (~3.5 V when VBATT=5.0 V)
•
Incorrect: Replace V702.
•
Correct:
Replace V703 and V704.
Note! The components V703,V704, R703 and R704 are only mounted at the board
version 3920/2.
If the fault still remains, send the phone to the next repair level.
3.6
The current consumption is between 1-200
mA.
Try to program the phone again. Make sure the system connector is okay.
Open the phone and check for liquid damages and other damages.
Check the soldering at D600 and D610 (fig. 3.3).
Measure the voltage at N701:5 (~3.2 V) and N700:5 (~2.5 V) (fig. 3.3).
•
Incorrect: Replace the faulty component. If the fault remains, send the phone to
the next repair level.