Troubleshooting - Samsung NK15A SERIES Service Manual

5 Troubleshooting

5-1 No Power
Does proper DC 14V appear at DC
jack connected to CN801?
Yes
Does proper DC 3.3V_A
1
appear at FT852?
Yes
Does proper DC 2.5V_A
appear at Pin 3 of IC802?
Yes
Does proper DC 3.3V_B
2
appear at FT822?
Yes
Does proper DC 2.5V_B
appear at Pin 3 of IC806?
WAVEFORMS
IC801 #2
1
NK15A*/NK17A*
No
Check SMPS PCB and Adapter.
No
Check IC801. (#2)
No
Check IC802.
No
Check IC805. (#1)
No
Check IC806.
IC805 #1
2
CONFIDENTIAL
5-1