DIAGRAMA DE SAMSUNG J7
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Level 3 Repair<br />
8-4-1. Power On<br />
Cell-phone can`t power on.<br />
Check the Battery Voltage.<br />
Battery > 3.4V?<br />
No<br />
Connect TA to charge the battery.<br />
Yes<br />
Power-on the phone and check<br />
the power-on sound<br />
or motor vibration.<br />
Sound or vibration ok ?<br />
Yes<br />
Change the LCD ASSY<br />
No<br />
Check the TAC5001<br />
Power-keyisnormal?<br />
Abnormal<br />
Change the Power-key.<br />
And retry to the power-on operation.<br />
Yes<br />
Check the U4003 output<br />
voltage<br />
(C4120,C4121=1.0V)<br />
No<br />
If the output voltage is not satisfied with normal<br />
condition, replace U4002.<br />
Yes<br />
Check the U4002 output signal<br />
(PMIC_POR(C4065) =1.8V)<br />
No<br />
If the output voltage is not satisfied with normal.<br />
condition, replace U4002<br />
Yes<br />
check the initial operation<br />
Yes<br />
END<br />
8-6<br />
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Distribution, transmission, or infringement of any content or data from this document without Samsung’s written authorization is strictly prohibited.
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