A1018s/A1018sc Standard Electrical Repair
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6 Charging
6.1 Type of fault.
To verify that it is the phone that is faulty, use a charger and a battery you know is
working and try to charge the battery. Note! The phone doesn´t begin to charge if
the charger is connected to a phone without a SIM card inserted (the display shows
”Insert Card”).
Perform a visual check of the battery screws and the system connector, change if
necessary. Start the phone using the On/Off-button and a fully charged battery, but
without the charger connected.
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If the phone doesn´t start, proceed to chapter 3 (“Doesn´t start”-fault).
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If the phone starts and shows charging, send the phone to the next repair level.
Connect a charger to the system connector.
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If the phone shows charging and the red top indicator is lit, the phone is without
fault.
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If the phone doesn´t show charging, proceed to section 6.2.
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If the phone starts and shows charging, but the battery isn´t charged, proceed to
section 6.3.
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If the phone shows charging, but the red top indicator isn´t lit, proceed to chapter
9 (“Illumination and buzzer”-fault).
6.1.1 Verification of the charging function.
Attach a normal battery to the phone. The battery voltage must be high enough to
start the phone, it will not begin to charge at once otherwise.
Cut a cable from a battery charger to make a charging test cable. Connect the test
cable to a power supply that shows the current consumption. Make sure the positive
side from the power supply connects to DCIO (the lonely pin at the system connec-
tor, pin 12). An alternative solution is to use a battery charger with a ammeter con-
nected in series.
Set the power supply to 7.6 V and the current limit to 700 mA. Connect the test
cable to the system connector of the phone and check the current consumption. If
the phone starts and shows charging and the current consumption varies between a
few mA and 700 mA (the alternative solution gives ~500-800 mA depending on
what kind of charger you use) with a few seconds interval, the charging function is
okay.
You have to verify the charging function after every repair of any part of the
charging function