Dcs Transmitter - Samsung SGH-L600 Service Manual

Flow Chart of Troubleshooting

9-15. DCS Transmitter

TX ON (0Level)
Yes
F100 Pin13
≥ 25dBm
No
F100 pin8
≥ 25dBm
No
pam100 pin18
≥ 25dBm
No
pam100 pin1
≤ -4dBm
Yes
osc100 pin 4,5,6,7
≥ 0.2Vp_p
Yes
Check UCP200
END
Yes
Resolder RFS100,C101,L100
Yes
Yes
Resolder or Change
No
No
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Check F100
pin9 = H (2.6V),
pin11 = L
Yes
C120
Yes
Check pam100pin
2,3,5,6,8+Vbatt
pin4, OK?
No
osc100pin16,17,29,
No
32,36 ≥2.8V
pin 10≥1.8V
Yes
9-24
No
Check ANT Switch
control circuit
Change or Resolder F100
Resolder or Change pam100
Check +VBAT or PAM
control signal
Check & Resolder
U101, C118,C121,C123,R105
And PMU Part
Resolder U101