Samsung 920NW Service Manual - Page 19
No Power & Power LED Off, Check C810, D803, C807 - troubleshooting
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UPC - 729507800905
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4 Troubleshooting 4-2 No Power & Power LED Off No power Check primary rectifier voltage Check circuit if short Check IC802, C805, T801 Check pin6 of IC802 voltage about 12V Check F801, P801, RT,801,D801 Check C810,D803,C807 Check pin2 of IC802 voltage about 3V Check primary OVP, OLP and secondary feedback, Check pin1 of IC802 voltage is voltage is below 1V Check R811, R810, R809, R808,R814 END 4-2
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4 Troubleshooting
4-2
4-2 No Power & Power LED Off
Check primary
rectifier voltage
Check pin6 of
IC802 voltage
about 12V
Check pin2 of
IC802 voltage
about 3V
Check pin1 of
IC802 voltage is
voltage is below 1V
Check circuit if
short
No power
Check IC802,
C805, T801
Check F801, P801,
RT,801,D801
Check C810,D803,C807
Check primary OVP, OLP
and secondary feedback,
Check R811, R810,
R809, R808,R814
END