Troubleshooting - Samsung NK15A Series Service Manual

5 Troubleshooting

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