Samsung DA-E750 - Measures to be taken when the Protection Circuit operates

4.Troubleshooting
4.2.MeasurestobetakenwhentheProtectionCircuitoperates
4.2.1.OperationofPowerBlockProtectionCircuit
•ProtectionCircuitoperateswhenpowerproblemoccursintheSMPS.
ProtectionCircuitOperation
PartLocationPinNo.
OpenShort
Remark
+5.2VS(2,3)○○
+12V(12)○○
PVDD+17.5V
(10,11)
○○
SMPS
CN851
PVDD-17.5V(6,7)○○
4.2.2.PowerProtection
TheConditionofPowerProtectionActive.
1)V oltageofSMPS(+5.2VS)ishigherthanstandards.
NormalConditionVoltageRange:+5.2VS
2)Over-currentoccurstoFET.(Over-outputorOutputshort)
3)FET’stemperatureexceed150°C.
4)NosupplyvoltageonGATEDRIVER.
Copyright©1995-2012SAMSUNG.Allrightsreserved.4-5