MICROMAX A67 FLASH SOLUTION

                       Canot download/flash SW

It might be the poor quality soldering of IO Connector or CPU, so you should check the soldering

quality of PCBA first ,then check the diagram as below

1.use a fresh cable。

2.check the I/O connector and its soldering quality

3.re-solder the IO connector

4. re-solder the 32K crystal or change it

5. re-solder the 26M crystal or change it

6. re-solder the flash or change it

7. re-solder the CPU or change it

8.Checking other function diagram

                           Canot power on

Check the positive and negative terminals of the PCBA to verify it is shorted or not; then power

on the handset with DC to verify its current is correct or not; then check the PWR is opened or

not; Re-flash the SW if the current is always 50mA; check the solder quality of 26M crystal or

RF Transceiver if the current is always 10mA.

1, Check the battery connector to verify it is shorted or not; then power on the handset with DC

to verify its current is correct or not;

2,Re-flash the SW ,check the DM、DP、U1TXD is shorted with ground or not ;

3,check the current is correct or not, check the LDO,VBAT is shorted with ground or not 。

4,check the visible component is shorted with ground or not

5,re-solder the 32K crystal or change it

6, re-solder the 26M crystal or change it

7, re-solder the CPU or change it