Trouble Shooting Guide, Standard
4/00021-2/FEA 209 544/21 B 9(26)
3 On/Off Problems
3.1 Type of problem
Make an external visual check of the phone:
Make sure that the battery connectors are intact, clean and fully functional.
Make sure that there is no liquid damage at the system connector and that the system
connector pins are correctly soldered.
Replace if needed.
Insert a fully charged battery and press the On/Off key:
If the phone starts without the On/Off key being pressed, go to section 3.2.
If the phone starts, check the charging function by connecting a charger to the system
connector.
If the charging function is faulty, go to chapter 6 (“Charging”-fault).
If the phone starts (lights the background illumination, asks for SIM/Pin, seeks net…) there is
probably nothing wrong with the phone or the fault is intermittent.
If the phone does not start, insert a dummy battery and keep the On/Off key pressed.
If the phone consumes more than 50mA, go to section 3.3.
If the phone consumes 15-30mA, go to section 3.4.
If the phone consumes less than 15 mA, go to section 3.5.
3.2 Starts immediately after inserting a battery
Open the phone and check for liquid damage.
Replace the dome foil.
If the fault remains, send the unit on according to the local company directive.
3.3 Consumes more than 50 mA
Open the phone and check for liquid damage.
Power up the board and press the On/Off key.
Measure the voltage at V500, at the side close to N700. It should be more than 4.1 V.
If the voltage is 3.70 V replace V500.
If the fault remains, send the unit on according to the local company directive.
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