Pcs Transmitter - Samsung SGH-j700 Service Manual

9-16. PCS Transmitter

TX ON (0Level)
Yes
F100 Pin8
≥ 25dBm
No
F100 pin11
≥ 25dBm
No
U107 pin18
≥ 25dBm
No
R102
≤ -4dBm
Yes
U101 pin C2, B1,
B2, A1 ≥ 0.2Vp_p
Yes
Check UCP200
END
Yes
Resolder RFS100,C101,L107
Yes
Yes
Resolder or Change
No
No
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Check F100
pin10 = H (2.6V),
pin12 = L
Yes
R100
Yes
Check U107 pin
2,3,5,6,8+Vbatt
pin4, OK?
No
C118, C116, C115
No
≥2.8V
C114 ≥ 2.9V
Yes
9-31
Flow Chart of Troubleshooting
No
Check ANT Switch
control circuit
Change or Resolder F100
Resolder R102 or Change
U107
Check +VBAT or PAM
control signal
Check & Resolder
U101, C118, C116, C115
And PMU Part
Resolder U101