Samsung AR18NSFHBWKNEU, Service Manual

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Samsung Electronics 10-30
10-2-25 No power outdoor (Initial Diagnosis) (Not displayed)
1. Checklist :
1) Is input power normal?
2) Is AC power linked correctly? (L,N,E)
3) Is mis-wiring between communication wire and Power wire?
4) Is input voltage of SMPS DC-link capacitor("CE101" ) normal?
5) Is the voltage of SMPS DC normal?
2. Troubleshooting procedure
YES
YES
YES
YES
YES
YES
Is the power cable from
terminal block toPBA is correct ?
CNP001(L) , CNP002(N) , CNP003(GND)
Is the power normal?
Is the SMPS is normal?
MAIN 18V(CE170) : 17Vdc ~19Vdc
Check the fuse open or not? ("F001" )
Is the SMPS is normal?
MAIN 5V(CE174) : 4.5V ~ 5.5Vdc
Unplug the power cord
Rest
Exchange the PBA
NO
NO
NO
NO
NO
NO
Reconnect the power wire correctly.
Check the power source.
Exchange the SMPS PBA
Exchange the PBA
Exchange the SMPS PBA
Exchange the SMPS PBA
Is the SMPS is normal?
MAIN 12V(CE175) : 11Vdc ~ 13Vdc