Blu Studio 5.0 II, Service Manual

Page: 30 / 44

Customer Service
Service Manual
30 / 44
N0/WEAK SIGNAL TROUBLE SHOOING
No or weak
signal
Inspect the antenna and
antenna connector to see
if there’s any distortion
Replace the
defective
components.
Put a false antenna at RF PA
IC to see if there’s any signal
Replace RF
coaxial line
Make a false antenna
at RF filter, check if
there’s any signal
Saw filter is
damaged,
replace it.
Replace 26M oscillator
to check if the problem
is solved.
Resolder or
replace CPU
YES
YES
Yes
No
Check and replace RF
coaxial line to see if
there’s
any signal
.
YES
Replace RF
PA