GH688,GA628, Standard Electrical Repairs
6 Charging.
6.1 Kind of charging fault.
Do a visual check of the battery screws and system connector. Replace if needed.
Start the phone with a fully charged battery using the On/Off key.
Y If it doesnOt start, proceed to chapter 3 (ODoesn?t start�-fault).
Y If the phone starts and indicates that it is charging without a charger connected
proceed to section 6.2.
Y If the phone doesnOt indicate that it is charging, turn it off and connect a charger
to the system connector.
* If it starts, indicates that it is charging and lights the red top indicator then
the phone is probably working correctly. To verify this, perform the test
described in 6.1.1.
* If the phone doesnOt start, proceed to section 6.3
* If the phone starts and indicates that it is charging but doesnOt charge, pro-
ceed to section 6.4.
* If it starts and indicates that it is charging but the red top indicator isnOt lit,
proceed to chapter 9 (OIllumination�-fault).
6.1.1 Verifying the charging function.
Connect an ordinary battery to the phone. The voltage of the battery must be so high
that you can start the phone with it. Otherwise the charging doesnOt start immedi-
ately.
Cut the cable from a charger and make a charging test cable.
Connect the charging test cable to a power supply that shows the current consump-
tion. Make sure that the DCIO pin is connected to the positive outlet of the power
supply. As an alternative you can connect an ordinary battery charger in serial with
an ampere meter.
Set the power supply at 7.6V and a current limit of 700mA.
Connect the charging test cable to the system connector of the phone and check the
current consumption.
Y ThereOs nothing wrong with the charging function if the phone starts, indicates in
the display that itOs charging and switches between 700mA (500-800mA depend-
ing on charger model if utilising the alternative solution) and ~5mA with a few
seconds interval.
Every time you repair a charging fault you have to verify the charging function as
described above.
4/00021-2/FEA 209 544/1.G38(112) |
ACEC
ERICSSON
