Service Excellence Beyond Imagination
SWA-CS Content Innovation
BT/WIFI
Step
Check point
Result value
Defect point
1
Confirm the defect symptom
(Check the turned on BT/WIFI & connected device)
Turned on
Go to the next step
Turned off
Turn on
2
Check the BT/WIFI Ant. & Ant contact.
(Rear cover Ant. & ANT201)
Broken, dust, corrosion
Ant & ANT201
Normal
Go to the next step
3
Power on with a power supply
(power supply voltage : 3.8V)
-
-
4
Check the voltage of C201,C200,C222
Notice. It should be measured when the BT/WIFI
path is activated on
C201 = 1.3V
C200 = 3.0V
C222 = 1.8V
Go to the next step
If not the correct value
PMIC (U401)
5
Check the clock of C203
Notice. It should be measured when the BT/WIFI is
activated on
C203 = 48MHz
(Same signal compared
with a good PBA)
Go to the next step
If not the correct value
OSC200
6
Check the status(crack, missing, Corrosion..etc) of
RF components.
C238, L212, ,C237 (ANT Matching)
F201,F200,C228 (filter and filter matching)
Notice. It should be measured when the BT/WIFI
path is activated on
Abnormal status
(compared with a good
PBA)
RF components.
If not the correct value
BT/WIFI IC
(U201)