Huawei Y511-U030 - 9.4.2 Keypad

XXXX The basic version Repair ManualV1.0
internal public
2013-09-25
华为机密，未经许可不得扩散
第 63 页，共 79 页
9.4.2 Keypad
 Circuit Principle Diagram
 Circuit analysis:
Y511-U00 has a power button, button under the volume, 3 physical buttons. The remaining
three for the virtual keys. The power button please start circuit reference before.
 Fault analysis and treatment process:
1. Key failure: check the main side key FPC welding and DOME and PCB are dirty;
2. If no dirt, may be the main chip has a problem, need to be welded or replacement of the
main chip.