Huawei Ascend Maintenance Manual

Y210 Mobile Phone
Maintenance Manual
9 Principles and Failure Analysis
Issue 1.0 (2012-11-28)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
24
Subsystem
Module
Unit
Function
Temperature Compensated Crystal
Oscillator
Antenna
External antenna, internal
interface component, antenna
protection
The phone uses internal antennas for
wireless communication, supporting
WCDMA high and low frequency
bands. The antennas are the main
antenna, GPS antenna, diversity
antenna, Wi-Fi/Bluetooth antenna,
and FM antenna (headset).
Coupler
Power coupler
Couples part of the power output
from the WCDMA power amplifier to
the RTR6285A for power monitoring.
User
interface
subsystem
UART interface
-
MSM7225A subsystem's UART1
interface for Bluetooth.
USB interface
Driver, protection circuit,
output interface component
The peripheral circuit, protection
circuit and interface connectors of the
USB interface in the MSM7225A
subsystem. It is the major data service
channel for the engineering sample,
and can be used to debug and test
devices during product development.
USIM card interface
Power supply, protection
circuit, USIM card holder
Mainly includes the USIM card
holder and related connection circuits.
Keypad and
backlight
Keypad driver circuit, external
keypad, backlight light emitting
diode (LED) control circuit

Supports GPIO for keypad
scanning.

Provides backlight LED. When a
key is pressed, the backlight is on.

Works in conjunction with
PM8029 to provide the keypad
backlight brightness adjustment
function.
Color LCD and
backlight
LCD driver, interface mode,
and backlight control
Phone's LCD with 256K colors. The
brightness of the LCD backlight can
be adjusted by users.
Speaker for playback
of MIDI ringtone
Driver mode, connection mode,
speaker component
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.
Receiver
Driver mode, connection mode,
receiver component
Emits sound during a call.
Microphone
Interface circuit, connection
mode, microphone component
The phone has two built-in
microphones to eliminate the

Huawei Ascend Specifications

General

Brand	Huawei
Model	Ascend
Category	Cell Phone
Language	English