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Flow Chart of Troubleshooting
9-24
9-16. PCS Receiver
RX ON
RF input : CH center freq : +67.7kHz
Cell Power : -60 dBm
Yes
No
Check F101
pin9=L, pin11=L
Yes
No
Check ANT Switch
control circuit
No
Change
or Resolder F101
Yes
Yes
Resolder C103, C104, L103
No
Yes
Check U101
pin12,13,29,29 ≥
2.8V
pin11 ≥ 1.8V
U101 Pin4, 5, 6, 7
≥ 0.2Vp_p
Check & Resolder
PMU part
No
No
Check & Resolder
U101, OSC100
Yes
Yes
Check UCP200
END
F101 Pin13
≥ -65dBm
F101 Pin5,pin6
≥ -65dBm
U101 Pin17,pin18
≥ -70dBm
Resolder RFS100, C102, R121,
L101