Huawei Y511-U030 Repair Manual page 59

XXXX The basic version Repair Manual
Signal display, check
the main transmission
channel
Check the transmission
circuit matching circuit
device is bad
Y
Check whether the
normal UI RF power
amplifier
Y
The transceiver chip
U600 (MT6166), the
CPU is damaged.
Y
To replace or re
welding transceiver
chip U600
Y
2013-09-25
V1.0
Insert a valid SIM card after the
boot does not open the Internet
Y
Check the antenna contact
and the PCBA antenna feed
point contact is good
Y
If there any signal
Y
N
replace or re bad
welding device
N
END
华为机密，未经许可不得扩散
Finishing cleaning
N antenna, PCBA
antenna feed point
No signal display, check
N
the circuit of RF system
Check the matching circuit
components have break or weld
Y
N
Check U616, U607 are
normal.
Y
The receive path reference
emission pathway
internal public
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