Trouble Shooting Guide, Standard
4/00021-2/FEA 209 544/31 B
9(23)
If the resistance over C615 is less, replace V607.
If that does not help, replace C615.
If the resistance over C615 is correct send the unit on according to the local company
directives.
3.5
Consumes less than 15 mA
3.5.1
Consumes no current
Open the phone and check for liquid damage.
Make sure that X100 is not dirty, damaged or incorrectly soldered.
Replace the dome foil. Make sure that the keypads are clean before mounting a new one.
Power up the board.
Measure the VBATT voltage on C400, on the pin close to V400 (3.8V).
If the VBATT voltage is correct, measure the voltage on pin 2 of V610 (3.8V).
If the voltage on V610:2 is correct, replace V610.
If the voltage on V610:2 is incorrect, send the unit on according to the local company
directives.
If the VBATT voltage on C400 is incorrect, replace X100.
If the fault remains, send the unit on according to the local company directives.
3.5.2
Consumes less than 15 mA
Open the phone and check for liquid damage.
Power up the board and start it by pressing the On/Off key.
Measure the VDIG voltage on C703, on the pin close to R706 (2.7 V).
If the voltage is incorrect, measure that the resistance of C703 is more than 150 kohms.
If the resistance is correct, send the unit on according to the local company directives.
If the resistance is incorrect, replace C703.
Measure the VCORE voltage at C702, on the pin close to R428 (2.5 V).
If the voltage is incorrect measure the resistance of C702 (>200 kohms).
If the resistance is correct, send the unit on according to the local company directives.
If the resistance is incorrect, replace C702.
If VDIG and VCORE are correct measure the VDSPC voltage on N740 pin 5 (1.8 V).
If the VDSPC voltage is incorrect, replace N740.
If VDSPC is incorrect after the replacement, measure the resistance of C740 (>20 kohms).
Replace C740 if it is incorrect.
If the fault remains, send the unit on according to the local company directives.
