Siemens A70 Service Repair Documentation page 45

Company Confidential
Copyright 2005© Siemens AG
Restrictions
• A battery which has completely run down can not be re-charged quickly because the battery voltage
is less than 3.0V and the logic which implements the charge control cannot be operated at this low
voltage level. In this case the battery is recharged via trickle-charging. However, the charging symbol
cannot be shown in the display because at this time logic supply voltages are not operating. The
charging time for this trickle-charging (until the battery can be fast-charged from then on) is in the
range of 1 hour. If, within this time, the battery voltage exceeds 3.2V, then the PMU switches on the
mobile and charging continues in the Charge-Only Mode. In some circumstances it can happen that
after trickle-charging and the usually initiated switch-on procedure of the mobile, the supply voltage
collapses so much that the mobile phone switches off again. In this case trickle charging starts again
with a now raised threshold voltage of 3.75V instead of 3.2V, at maximum for 20 minutes. The PMU
will retry switching on the phone up to 3 times (within 60 minutes overall).
•
Charging the battery will not be fully supported in case of using old accessory (generation '45' or
earlier). It is not recommended to use any cables that adapt "old" to "new" Lumberg connector. Using
such adapters with Marlin will have at least the following impact:
1) half-sine wave chargers (e.g. P35 & home station) can not be used for trickle charging
2) normal charging might be aborted before the battery is fully charged
3) EMC compliance can not be guaranteed
• A phone with a fully charged LiIon battery will not be charged immediately after switch-on. Any input current
would cause an increase of the battery voltage above the maximum permissible value. As soon as the
battery has been discharged to a level of about 95% (due to current consumption while use), it will be re-
charged in normal charging mode.
• The phone cannot be operated without a battery.
• The phone will be destroyed if the battery is inserted with reversed polarity.
• The mobile phone might be destroyed by connecting an unsuitable charger.
In case the transistor fails the ASIC will be destroyed. In the case of voltages lower than 15V and an improper
current limitation the battery might be permanently damaged. A protection against grossly negligent use by the
customer (e.g. direct connection of the charge contact to the electricity supply in a motor car) is not provided.
Customer safety will not be affected by this restriction.
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