Micromax Ninja A91 User manual

1
A91
L1 & L2 service manual

2
content
1、Product introduce..………..p3-p4
2、Disassembly guide ……….p5-p19
3、Structure parts diagram…..p20-p21
4、Repairing guide …………...p22-p32

3
Product introduce

4
Product introduce
Model ：
Product size：130×66×10mm
Platform：MTK 6577 ，dual-core 1.0GHz
Memory：4GB+512MB (Nand&sdram+RAM）
System：Android 4.0
Frequency band:dual-SIM WCDMA：2100MHz，GSM900/1800/1900 MHZ
Battery：1800mAh
charger: Travel charger
USB cable: MICRO 5PIN
earphone：3.5jack
LCD&TP：4.5FWVGA,TN, resolution:480*854，Capacitance TP multi-point
touch（2 point）
Camera：0.3M and 5.0M CMOS
Support：GPS，BT3.0，WIFI，FM。
Support：accelerator sensor, distance sensor, light feeling sensor。

5
Hot gun
Tweezer
Solder iron
Tommy bar
Cross Screw driver
1. Tools list
Tweezer /Cross screw driver/ Solder/Tommy bar/hot gun
Disassembly guide

6
2. Battery caver disassembly
open the battery cover，as the Fig. 1
Fig. 1
Disassembly guide
Battery
cover

7
3. Back caver disassembly
1）Unscrew 10 screws in back cover ，as the Fig.2；
Fig. 2
Disassembly guide

8
Fig. 3
2）Disassemble back cover with Tommy bar ，as the Fig.3；
Disassembly guide
Back
cover
SPK

9
4.Main board and front cover disassembly
1）The main components of distribution，as the fig.4；
Fig.4
Disassembly guide
Sub PCBARF cable
SIM con.
LCD con.
TP con.
Earphone
con.
USB con.
5.0M
CAM.
Main
PCBA T card
con. Battery con. Main FPC vibrator

2）remove two screws and open the volume key FPC & LCD con.& TP con. ，
as the fig.5；
10
Fig.5
Disassembly guide
LCDcon. TPcon.
Volume key
FPC

3）remove the power key FPC and RF cable con. and 5M camera, as
the FIG. 6
11
Fig.6
Disassembly guide
Power key
FPC
RF cable con.
5M camera

4）open the main board And main FPC con..as the FIG.7
12
Fig.7
Disassembly guide
Main FPC con.
Main board

remove the light sensor and 0.3M camera，as the fig.8；
13
5. 0.3M camera & light sensor disassembly
Fig.8
Disassembly guide
Light sensor con. Light sensor&holder
Sensor holder
Light sensor
0.3M cam.
0.3M cam. CON.

14
Fig.9
6.Power key FPC & volume key FPC disassembly
remove the power key FPC and volume key FPC with the iron，as the fig.9；
Disassembly guide
Power key
FPC Volume key
FPC

15
Fig.10
remove the receiver and speaker，as the FIG.10；
7. 5M camera &receiver disassembly
Disassembly guide
receiver speaker

16
Fig.11
8. RF cable disassembly
remove the sub PCBA from the ，as the fig.11
Disassembly guide
RF cable
Main FPC
Sub PCBA

17
Fig.12
9. Sub PCBA disassembly
Remove the RF cable and main FPC ，as the fig.12；
Disassembly guide
vibrator
Main FPC CON.
RF cable CON.
MIC CON.

18
Fig.13
10.MIC、Main FPC& vibrator disassembly
Remove the vibrator,MIC& ，as the fig.13；
Disassembly guide
MIC
vibrator

19
Structure parts diagram
Back
cover
Battery
cover 3in1 module
（LCD, TP & front
cover）

20
Structure parts diagram
Main
PCBA
5M camera receiver
SPK Light
sensor
FPC
RF
cable
Sensor
holder
Main FPC
0.3M
camera
sub PCBA
MIC Volume key
FPC Power key
FPC
Volume key Power key