User Guide

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10-1

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10. Chart of Troubleshooting

10-1.

Baseband

10-1-1.

Power ON

Power On' dose not work

Check the current

consumption more than

100

Check the

Vbat more than

3.3V

Check the HP_CORE_1.57V

≥1.57

and HPEIO_1.8V≥ 1.8V

Check VCCD_2.8V and

VRST_1.8V of CPU301

Check VRF_2.9V and VCCB_2.9V

Check R110, R111 of U102

Freq=13Mhz, Vpp>0.4V

Check the initial

operation

END

Download again

Check R642, VR608

Change the Battery

or Recharging the battery

Check U701 and C703 and C705

Check CPU301, C308 and C307

Check CPU301 and C310 and C312

Check U102 and R110, R111, C119, C122

YES