Service Manual
42
Description:
[1] The connector with cable should face upwards.
[2] Check whether the FPC is assembled and connected properly.
[3] Use a normal front case to check whether the connection between the earpiece board and the
earpiece connector is normal.
[4] Test the audio signals before and after the analog switch.
[5] Check whether the 70-pin connector is properly connected and soldered.
[6] Please refer to the definition about accessory identification in the chapter “Interface Description”.
[7] If audio is input, the SPEAKER+ and SPEAKER- square waveforms will be output.
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