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Flow Chart of Troubleshooting
9-30
9-14. GSM Transmitter
Resolder RFS100, C110, L106
U104pin
11,12,16,29
32,33,36 ≥2.8V
END
Check UCP200
Yes
Resolder U104
Check VBAT or PAM
control signal
No
Change or Resolder F101
Yes
F101 Pin13
≥ 30dBm
TX ON (5Level)
Check F101
pin11 = H (2.6V),
Pin9 = L
F101 pin10
≥ 30dBm
U102 pin11
≥ 30dBm
U102 pin7
≤ -2dBm
Check ANT Switch
control circuit
Resolder or Change L115
U104 pin 4,5,6,7
≥ 0.2Vp_p
Yes
Check U102
pin3,4,5,6 OK?
Resolder or Change U102
Check U104,
C131,C134,C135
No
No
No
No
Yes
Yes
Yes
Yes
Yes
No
Yes
No
No
Содержание SGH-J210
Страница 28: ...Block Diagrams 7 2 7 2 RF Solution Block Diagram ...
Страница 29: ...Block Diagrams 7 3 7 3 BT Solution Block Diagram ...
Страница 30: ...Block Diagrams 7 4 ...