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8-3-16. GSM850/900 Tx
TX Power is too Low!!
TX ON (5Level)
CLOCK
CHECK?
26MHz @ OSC201 (pin1,
pin3)
YES
PAM100 pin27 ≥ -1
dBm
(R106 using spectrum
analyzer)
YES
Check the Voltage
C103 〉 3.3V?
YES
PAM100 Pin17 ≥
30dBm
(R100 using spectrum
analyzer)
YES
Check the RFS100
connection with PCB?
YES
Antenna
re-solder or change
SAMSUNG Proprietary-Contents may change without notice
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NO
Re-solder
OSC200
NO
Re-solder or change
UCP200
NO
Check the UCP200 & VBAT
circuit.
NO
Resolder PAM100
NO
Resolder RFS100.
8-37
Level 3 Repair
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