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Flow Chart of Troubleshooting
9-28
9-16. DCS Transmitter
U101pin11,12,16,17,
29,32,33,36≥2.8V
pin 10≥1.8V
F100 Pin13
≥ 25dBm
Resolder CN100,C101,L104
TX ON (0Level)
Check F100
pin9 = H (2.6V),
pin11 = L
F100 pin8
≥ 25dBm
U100 pin20
≥ 25dBm
U100 pin6
≤ -4dBm
Change or Resolder F100
Check ANT Switch
control circuit
Resolder or Change
C117, C118, C120
U101 pin 4,5,6,7
≥ 0.2Vp_p
Yes
Check U100pin 4,5,
8,14 +Vbatt pin2,3,
15,16 OK?
Resolder or Change U100
Check +VBAT or PAM
control signal
Check & Resolder
C121,C124,C126
And PMU Part
No
No
No
Yes
Yes
No
Yes
Yes
Yes
Yes
No
No
No
Yes
No
END
Check U200
Resolder U101
Yes
Summary of Contents for SGH E590 - Cell Phone 70 MB
Page 36: ...8 PCB Diagrams 8 1 Top ...
Page 37: ...PCB Diagrams 8 2 Bottom ...