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