
X458 L3 Service Manual
34
Stand-by short time
YES
Connect the phone with Voltage
regulator, the current should be zero
Check if the idle current be
normal
(
0mA or little more
)
Replace
CPU
Stand-by short time
Power on the phone, check
the if working current be
normal
(
no exceed 600mA
)
Defective resolved
YES
YES
YES
Check and
replace
RF- PA,
AUDIO-PA,
NO
NO
YES
Check if the components on the
PCB are damaged, capacitor,
power supplier, LDO, etc.
By touch to
find the
component
getting hot,
replace it.
Change battery
Re-flash SW
NO
NO
YES
YES
NO
NO
NO
NO
All manuals and user guides at all-guides.com
Summary of Contents for X458
Page 13: ...X458 L3 Service Manual 13 All manuals and user guides at all guides com ...
Page 14: ...X458 L3 Service Manual 14 Output of SIM Card All manuals and user guides at all guides com ...
Page 17: ...X458 L3 Service Manual 17 Display interface All manuals and user guides at all guides com ...
Page 48: ...X458 L3 Service Manual 48 All manuals and user guides at all guides com ...