Samsung Galaxy Grand 2 Repair Manual page 67

SIM card detection problem
Step
1 Confirm the defect symptom
2 Check the SIM socket & Connector
Power on with a power supply
3
(power supply voltage : 3.8V)
Check the signal of R618 for SIM601(UIM1)
4
Notice. It should be measured when the phone
is started
Check the signal of SIM socket pin1 (C636)
5
Notice. It should be measured when the phone
started
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Check point
R629 for SIM600(UIM2)
(C640)
Result value
-
Broken, dust, corrosion
Normal
-
3V or 3V clock
If not the correct value
3V
If not the correct value
Defect point
-
SIM socket
Go to the next step
-
Go to the next step
Call Processor
(UCP300)
SIM socket
PMIC (U401)
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