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L1 Service Manual
3.2.
Precaution
The heart of the handset contains all digital circuit (microprocessor, ASIC, memories, display, keypad, etc)
and the high-frequency transceiver circuit which is protected by the upper and lower cover.
However, some ESD sensitive area is completely or partially visible (keypad keys, micro-SIM drive, etc).
In order to prevent any risk of ESD damage during disassembly or assembly of the handset, the operator's
wrist should be grounded.
This picture illustrates the connection. The operator wears an electrostatic conduct bracelet which
connected to an anti-static pad. And the pad place on the work surface which connected to the metal
structure workbench, the whole being earthed.
3.3.
Battery test
3.3.1.
Charging Process
1)
Table 2.1 describes the various events related to a standard charger connected to a cell phone.
Cell phone status before
charger connected
Rev.
1.1
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