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5 Troubleshooting
5-1 No Power
Does proper DC 14 V appear at
DC jack connected to CN12?
Yes
Does proper DC 5 V appear at
Pin 4 of IC11?
Yes
Does proper DC 14V appear at
Pin 1 of IC11?
Yes
Does proper DC 3.3 V appear at
Pin 3 of IC14?
Yes
Does proper DC 2.5 V appear at
Pin 4 of IC109 and IC17?
Yes
Check IC23.
LS15E23C/LS17E24C
No
Check SMPS PCB and Adapter.
No
Check IC11.
No
Check IC11.
No
Check IC14.
No
Check IC109 and IC17.
CONFIDENTIAL
5-1
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