Table of Contents
Advertisement
U8655
Maintenance Manual
Subsystem
Module
Speaker
Receiver
Microphone
Earphone
Vibration motor
interface
NFC
Proximity and
illuminance
sensor
Accelerometer
Battery
Power
External power
supply
supply (travel
subsystem
charger)
Issue 1.0 (2012-02-23)
Unit
Driver mode,
connection mode,
speaker component
Driver mode,
connection mode,
receiver component
Interface circuit,
connection mode,
microphone
component
Earphone, headset
interface circuit,
microphone interface
circuit
Driver mode,
connection mode,
motor
I2C interface control
I2C interface control
I2C interface control
Li-ion battery
Adapter, and
interface component
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
9 Principles and Failure Analysis
Function
Plays polyphonic ringtones for incoming calls.
The maximum power of the speaker is 500 mW.
It has good frequency response for playing
20–20000 Hz ringtones. It can also play
monophonic MP3 audio files.
Emits sound during a call.
The phone has two built-in microphones to
eliminate the environmental noise.
The phone provides a headset jack to output music
playback audio or voice during a call. The
microphone on the headset cable can pick sound and
input it into the phone. TheU8655N supports only
the LRGM headsets.
When there is an incoming call, the motor can
vibrate notify the user of the call.
Performs proximity sensing function.
Senses the intensity of environmental light for
adjusting the LCD and keypad backlight brightness.
Detects the distance between the phone and the
user's skin and turns the LCD and touchscreen panel
off when the distance is smaller than the specified
value.
Senses acceleration to help implement game
functions.
3.7 V/1250 mAh (the battery must be certified and
comply with relevant safety regulations).
The charger meets the requirements of China,
Europe, the USA, and Australia.
Charger specifications: 90–240 V, 45–55 Hz, AC
input. The model differs with different markets.
The output voltage of the charger is 5± 0.25 V.The
charger must be CE and CCC certified.
The charger's output current must be able to charge
the battery and supply power to the phone for
normal operation at the same time.
24
Advertisement
Table of Contents
