Micromax A69 User manual

A69 L2 Service Manual
1. Main Components
POWER KEY
VOL
KEY
BACK
CAMERA
POWER KEY
FPC
LCD
FRONT
CAMERA

A69 L2 Service Manual
MIC
Vibrator
SPEAKER
Back Camera

A69 L2 Service Manual
2.Display issue
NO
Description
Reason
Solution
1
Segments missing, Fading,
Contrast issue, Black lines, Color
issue, Backlight issue, Blank
display, Bad pixel, Flickering
SW
FLASH THE SW
Soldering issue
Re-soldering the LCD
LCD issue
Change the LCD
CPU
Refer to the service guide L3
2
Mechanically broken
LCD issue
Change the LCD
LCD TESTING JIG

A69 L2 Service Manual
3. Touch panel
NO
Description
Reason
Solution
1
TP NOT WORKING
TP ISSUE
Change the TP
TP connection issue
Assembly the TP again
PCBA issue
Refer to the service guide L3
CPU
Refer to the service guide L3
2
TP not working
properly
TP ISSUE
Change the TP
PCBA ISSUE
Refer to the service guide L3
1、Dis-assembly the TP carefully 2、The TP driver IC is with TP itself, need to flash the TP driver with the TP JIG
USE THE PCBA testing JIG to verify the issue was with PCBA or TP

A69 L2 Service Manual
4. Camera
NO
Description
Reason
Solution
1
Bad image
Soldering issue
Re-solder it
Camera issue
Change it
CPU
Refer to the service guide L3
2
Camera not ready
Soldering issue
Re-solder it
Camera issue
Change it
CPU
Refer to the service guide L3
3
DEAD,No functionality
Soldering issue
Soldering issue
Camera issue
Change camera
CPU
CPU
4
Canot turn to front
camera
Camera issue
Change front camera
5
Canot turn to back
camera
Camera issue
Change back camera
Front camera
Back camera
Back camera with
flashlight
Front camera

A69 L2 Service Manual
5. Speaker
NO
Description
Reason
Solution
1
Noise/crack
The SPK with dust
Clean the SPK
SPK foam issue
Change it
Spk issue
Change it
CPU
Refer to the service guide L3
2
No volume
Soldering issue
Re-soldering it
SPK issue
Change it
CPU
Refer to the service guide L3
3
Low volume
Soldering issue
Re-soldering it
SPK issue
Change it
CPU
Refer to the service guide L3
The volume of good SPK is 8Ω +/-0.5
SPK

A69 L2 Service Manual
6. Microphone
NO
Description
Reason
Solution
1
Noise with uplink side
Some dust with MIC
Clean the MIC
Assembly issue
Assembly it
MIC issue
Change it
CPUor related component
Refer to the service guide L3
2
Volume low/no
volume with uplink
side
Soldering issue
Re-solder it
MIC issue
Change it
CPUor related component
Refer to the service guide L3
3
TDD noise
MIC issue
Change it
1, The volume of good mic K is 2.2kΩ +/-0.5%2，Soldering temperature is 330+/-10℃
Mic

A69 L2 Service Manual
7. Receiver
NO
Description
Reason
Solution
1
Noise/crack
There is dust with receiver
Clean the receiver
Receiver issue
Change it
CPU
Refer to the service guide L3
2
No voice/ volume low
Connection issue
Assembly it again
Receiver issue
Change it
CPU
Refer to the service guide L3
1. The volume of RECEIVER is 32Ω +/-15% Ohm(at 1KHZ,179mV input)
RECEIVER
引线

A69 L2 Service Manual
8. Vibrator
NO
Description
Reason
Solution
1
Vibrating is not
properly
Motor assembly issue
Assembly it again
Motor issue
Change it
2
No vibrating
Motor soldering issue
Soldering it again
Motor issue
Change it
CPU
Refer to the service guide L3
The volume of good Vibrator is 30Ω +/-5%
Soldering temperature is 330+/-10℃

A69 L2 Service Manual
9. Battery
NO
Description
Reason
Solution
1
no output
the voltage of battery is less
than 3.3V
The voltage of battery is more than
1V, and its volume is 150mΩ+/-10%,
then the battery is good, you can
charge it by DC power (4V) directly
the voltage of battery is less
than 3.5V
Keep charging it until its voltage to be
3.7V
the voltage of battery is 0
Change battery
2
no charging
the voltage of battery is less
than 3.5V
Keep charging it until its voltage to be
3.7V
the voltage of battery is 0
Change battery
CPU or charging IC with issue
Refer to the service guide L3
3
Auto charging
CPU or charging IC with issue
Refer to the service guide L3

A69 L2 Service Manual
10. EARPHONE
NO
Description
Reason
Solution
1
ONE SIDE IS NOT
WORKING
earphone issue
change the earphone
Cable broken
open the housing of MIC, check and
solder the cable
CPU or charging IC with issue
Refer to the service guide L3
2
Noise
Cable broken
open the housing of MIC, check and
solder the cable
Spk issue
Change the earphone
3
MIC is not working
MIC issue
Change the earphone
Cable broken
open the housing of MIC, check and
solder the cable
3
Can’t end the call by
earphone
Assembly issue
Open the MIC housing ,check and
assembly iy again
A075 耳机
The volume between pin1 and pin4 is 32Ω+/-1Ω, the volume between pin2 and pin4 is 32Ω+/-1Ω, then the spk of earphone is OK;
The volume between pin3 and pin4 is 2.2KΩ+/-1Ω,then the MIC is OK.
EARPHONE

A69 L2 Service Manual
11. DATA CABLE
NO
Description
Reason
Solution
1
NO CHARGING
CABLE ISSUE
Change it
CHARGER ISSUE
Change it
The I/O connector of PCBA is
with issue
Change the I/O connector
CPU
Refer to the service guide L3
2
Canot use DATA
D+ or D- is broken
Change the data cable
DATA CABLE

A69 L2 Service Manual
12. CHARGER
NO
Description
Reason
Solution
1
No charging
Data cable issue
Change the data cable
I/O connector
Change the I/O connector
Charger issue
Change the charger
CPU
Refer to the service guide L3
2
Charging slow
Data cable issue
Change the data cable
I/O connector
Change the I/O connector
CPU
<VCHG is poor soldering>
Refer to the service guide L3
CHARGER
CHARGER

A69 L2 Service Manual
13. No signal
NO
Description
Reason
Solution
1
No signal
the connection of antenna is not
good
Assembly it again
SIM issue
use a fresh SIM to verify it
SIM slot issue
Refer to the service guide L3
RF IC issue
Refer to the service guide L3
Calibration data missing
Flash the SW
CPU
Refer to the service guide L3
14. Canot send the SMS/MMS
NO
Description
Reason
Solution
1
Canot send the
SMS/MMS
SERVICE NO ISSUE
Contact the operator
SIM no service
use a fresh SIM to verify it
Use the 3rd party APK
Flash the SW
Thanks
For any query or suggestion please write to [e-mail]