Troubleshooting - Samsung RB15AS Service Manual

5 Troubleshooting

5-1 No Power
Does proper DC 12 V appear at
DC jack connected to CN117?
Yes
Does proper DC 5 V appear at
Pin 1 of IC118?
Yes
Does proper DC 12V appear at
Pin 2 of IC109?
Yes
Does proper DC 3.3 V appear at
Pin 1 of IC120?
Yes
Does proper DC 2.5 V appear at
Pin 3 of IC120?
Yes
Check IC122.
RB15AS/RB15NS
No
Check SMPS PCB and Adapter.
No
Check IC118.
No
Check IC109.
No
Check IC120.
No
Check IC120.
5-1