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A27
Micromax A27 User Manual
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17
3.10
Vibrate fault
Is vibrator soldered well ?
Vibrator fault or No
vibration
OK
Solder vibrator or replace
vibrator
No
Check : Wire of vibrator
isn
’
t broken
No
Yes
Replace vibrator
No
Replace new mainboard
Yes
Check vibrator circuit
No short circuit or open circuit
No
Mark the mainboard with
analysis result
16
18
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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