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Nokia 447U (model 447XS, 447U251, SMA223) don`t start (+)

April 19 2006 at 12:55 AM
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I can swith on only standby (it uses TOP223, red LED is on). Which values do R116,117(source switch FET-primary ground), R125,114 (+capacitor- cold pin transformator) have? I replaced 11NB60, L4990 (There was 4990À- I installed 4990), there is ÂÑ857Â near it, I could not find any bad one. Instead of R116,117 I istalled 0,56 Îì,, R125- 0.22 Îì. I didn`t find sheet but I found sheets 447ZA, 447S, 447K, 447Pro which use UC3842. Datasheet of 4990 is different from the sheet of monitor. Thank you.

 
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