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A27
Micromax A27 User Manual
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3
1. Cir
cuit diagram instructio
n
.1 Main board e
xplored
v
iew
LCD P
AD
Earphone
connector
WIFI/BT IC
direction
sensor
四方向传感器
T
-card connector
Battery connec
tor
receiving
filter
接收滤波器
SIM connecto
r
SC6820
FLASH
TP
conne
ctor
USB
connector
RF
amplifier
射频放大器
RF transceive
r
26M crystal
Crystal IC
32.768
2
4
Table of Contents
Default Chapter
2
Table of Contents
2
1 Circuit Diagram Instruction
3
Main Board Explored View
3
Detailed Description of Circuit Chart
4
RF Circuit
4
Base Band Circuit
5
Function Circuit
5
2 Fault Maintenance
6
3 Trouble Shooting and Flow Chart
8
Unable to Power on the Handset
8
No Ring Tone
9
LCD Display Fault
10
Charging Fault
11
Camera Fault
12
Fail to Identify SIM Card
13
MIC Fault
14
Keypad Fault
15
Receiver Fault
16
Vibrate Fault
17
FM Fault
18
Bluetooth Fault
19
No Signal
20
Failure to Identify T-Flash Card
21
Earphone Fault
22
Unable to Use USB
23
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Micromax A27 Specifications
General
Brand
Micromax
Model
A27
Category
Cell Phone
Language
English
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