Micromax A69 Manual de usuario

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

Description

Reason

Solution

Segments missing, Fading,

Contrast issue, Black lines, Color

issue, Backlight issue, Blank

display, Bad pixel, Flickering

FLASH THE SW

Soldering issue

Re-soldering the LCD

LCD issue

Change the LCD

CPU

Refer to the service guide L3

Mechanically broken

LCD issue

Change the LCD

LCD TESTING JIG

A69 L2 Service Manual

3. Touch panel

Description

Reason

Solution

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

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

Description

Reason

Solution

Bad image

Soldering issue

Re-solder it

Camera issue

Change it

CPU

Refer to the service guide L3

Camera not ready

Soldering issue

Re-solder it

Camera issue

Change it

CPU

Refer to the service guide L3

DEAD,No functionality

Soldering issue

Camera issue

Change camera

CPU

Canot turn to front

camera

Camera issue

Change front camera

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

Description

Reason

Solution

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

No volume

Soldering issue

Re-soldering it

SPK issue

Change it

CPU

Refer to the service guide L3

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

Description

Reason

Solution

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

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

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

Description

Reason

Solution

Noise/crack

There is dust with receiver

Clean the receiver

Receiver issue

Change it

CPU

Refer to the service guide L3

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

Description

Reason

Solution

Vibrating is not

properly

Motor assembly issue

Assembly it again

Motor issue

Change it

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

Description

Reason

Solution

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

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

Auto charging

CPU or charging IC with issue

Refer to the service guide L3

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