Radio Part - Samsung SGH D900i - Ultra Edition 12.9 Cell Phone 60 MB Service Manual

9-19. Radio part

Radio does not work
R406, R413, C423
R405, R409,C420, C421
C428, L401, C429, C431
Yes
≥ 2.8V
Yes
≥ 2.8V
Yes
L400 ≥ 2V
Yes
is OK?
Yes
Check U200
Yes
END
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No
Resolder R406, R413, C423
and Check PMU part
No
Resolder R405, R409,C420, C421
and check U501
No
check or Replace U403
No
Resolder C428, L401, C429, C431
9-29
Flow Chart of Troubleshooting