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SAMSUNG Proprietary-Contents may change without notice
Flow Chart of Troubleshooting
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3-31
3-2-4. EGSM TX
Continuous TX ON condition
TX Power Code : 500 code Applied
CH : 62
RBW : 100KHz
VBW : 100KHz
SPAN : 10MHz
REF. Level : 10dBm
ATT. : 20dB
C120
>= 3.7V?
Change PAM100
NO
YES
DUF100 Pin#13
About 2~3 dBm?
DUF100
Pin#11 = High?
U838
Check & Change
NO
DUF100, C103
Check & Change
YES
DUF100
Check & Change
YES
Check the
Battery Block
Level of PAM100
Pin #6 is
1.2V?
Check
U838 TXP OK ?
U838
Check & Change
YES
YES
NO
NO
NO
NO
PAM100 pin#12
About -5 dBm?
PAM100 pin#7
High ?
Check U838
YES
NO
YES
C106
≥
2.8V ?
U100 Check
Pin #21 : 26MHz ?
Vpp : 1.1V?
R113 = 26MHz ?
Vpp : 1.2V?
R111 = 2.8V ?
NO
YES
NO
NO
NO
C125, C129
resolder
TCX100
Change or resolder
YES
YES
YES
NO
C105,107,108,U838
Check or resolder
U100 Pin
#34, = 2.8V?
YES
Change PAM100
Check U838
NO
YES
Level of
DUF100 Pin#10 is
4~5dBm ?