Lenovo P70-A Руководство по эксплуатации - Страница 13

Просмотреть онлайн или скачать pdf Руководство по эксплуатации для Сотовый телефон Lenovo P70-A. Lenovo P70-A 41 страница.

Repair Manual of Lenovo P70-A Mobile Phone

4.3.2 No ring

Replace Speaker and recheck whether it is

normal?

Check to see whether the SPK circuit is

normal?(D1405,D1406,C1413,B1405,B1406,R

505,R506)

Use earphone to test whether there is sound; if

there is sound from earphone, there is audio

signal to input. Check whether J1803 KB

connector device is of cold solder joint; recheck

whether it is ok after re-welding，Replace the

KB connector FPC to try again；

Check to see whether the main chip U503 is

damaged. Replace it if damaged.