Other Common Failure - Huawei Y511-U030 Repair Manual

XXXX The basic version Repair Manual

Fault analysis and treatment process:
1、Check whether the normal work of the 26M clock, clock signal waveform such as sine signal
baseband 26M.
2、if the clock and power supply are normal, can check whether the normal work of the RF channel,
from the antenna terminal has been the investigation to the chip end, measuring the conductivity.
3、if the RF channel no abnormalities, can check if there is a problem of antenna weld,
welding or direct replacement chip

9.4.12 Other common Failure

1. Sensor failure analysis method is relatively simple, general for the chip is damaged or faulty, re
welding or replacement of the chip can be.
2. The touch screen if there can not touch, touch the drift problem, first check the touch ZIF
connectors TP and motherboard is the welding is good, if the welding is good, the possibility that the more
is the touch screen itself caused by the poor.
2013-09-25
V1.0
Internal block diagram
MT6627
华为机密，未经许可不得扩散
internal public
第 79 页，共 79 页