Samsung LTM1525 Dokumentacja Pobierz pdf (Strona 22)

CONFIDENTIAL

LTM1525/LT15S13C 5-1

5 Troubleshooting

5-1 No Power

Does proper DC 14V appear at DC

jack connected to CN801?

Check SMPS PCB and Adapter.

Yes

Does proper DC 3.3V_A

appear at FT852?

Check IC811.

Check IC812.

Yes

Does proper DC 2.5V_A

appear at Pin 3 of IC802?

Check IC802.

Yes

Does proper DC 3.3V_B

appear at T807?

Check IC805.

Yes

Does proper DC 2.5V_B

appear at Pin 4 of IC806?

Check IC806.

WAVEFORMS

IC811 #2

IC805 #1

IC812 #2

1 2 ... 17 18 19 20 21 22 23 24 25 26 27 ... 99 100

Brak uwag

Samsung LTM1525 Dokumentacja Strona 22