Huawei YU220, Service Manual

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YU220 service manualV1.0
2013-10-18
Huawei secrets, no dispersion without permission
1.7
Cell phone burn hot, stand-by time short.
For mobile phone hot, the internal circuit will generally have a short
circuit, mainly check whether each power supply is shorted to ground, in view
of the hot location, you can quickly touch the PCB board by hand to see where
location heat, you can quickly locate. The main three power circuit and
VBAT are relatively common phenomenon. You can use an external power
connected to VBAT for seeing current, a quick disconnect after touching it to
avoid any danger.
For VBAT short circuit can refer to 5.1.3.