Troubleshooting - Samsung LW17N23W Service Manual

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5 Troubleshooting

5-1 No Power
Does proper DC 14V at C602?
1-1
Yes
Does proper DC 5V
1-2
appear at L601?
Yes
Does each proper DC1.8V, 3.3V
1-3
appear at L604, L605?
Yes
Does each proper DC 5V
1-4
appear at L603?
Yes
Does each proper DC 3.3V, 33V
1-5
appear at C618, C621?
Yes
Does proper DC 14V
1-6
appear at C628?
Yes
Does each proper DC 8V, 9V_1
1-7
appear at C635, C638?
Yes
Replace the board with new one.
LW17N23W
No
Check adapter for 14V and 4.5A.
No
Change IC601 or main ass'y.
(BN94-00512A)
No
Change IC610 or main ass'y.
(BN94-00512A)
No
Change IC602 or main ass'y.
(BN94-00512A)
No
Change IC603/IC604 or
main ass'y. (BN94-00512A)
No
Change IC605 or main ass'y.
(BN94-00512A)
No
Check IC607/IC608 and
related circuit.
5-1

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