my baby himanshi
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Tuesday, November 1, 2016
Sunday, October 30, 2016
Monday, March 14, 2016
Tuesday, October 6, 2015
Thursday, April 9, 2015
Wednesday, March 25, 2015
Wednesday, March 18, 2015
Monday, March 9, 2015
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
Monday, January 19, 2015
Saturday, December 27, 2014
Saturday, December 20, 2014
Tuesday, December 16, 2014
Friday, November 28, 2014
Tuesday, November 25, 2014
Tuesday, November 18, 2014
Monday, November 17, 2014
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