Samsung AR18NSFHBWKNEU, Service Manual

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Samsung Electronics 10-29
10-2-24 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 mis-wiring between Main PBA and SMPS PBA wire?
5) Is input voltage of SMPS AC in Main PBA (CN150) normal?
6) Is the voltage of SMPS DC in Main PBA (CN151,CN152) normal?
2. Troubleshooting procedure
Unplug the power cord
Restart after power o .
Check SMPS wire connection
Is the power cable from
terminal block to PBA is correct?L :CN002, N:CN001,
EARTH:CN003
Is the power normal?
Check the fuse open or not? (F001)
Is AC power is normal for SMPS?
CN150 : 220Vac~240Vac
NO
NO
NO
NO
Reconnect the power wire correctly.
Check the power source.
Exchange the Main PBA
Exchange the Main PBA
YES
YES
YES
YES
MODEL
ALL
YES
Exchange the PBA