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SAMSUNG Proprietary-Contents may change without notice
Flow Chart of Troubleshooting
10-
10
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10-2-2. GSM900 TX
C122
= 3.7V?
NO
YES
PAM100 Pin#12
About 2~3 dBm?
C125 High,
C120 = Low?
UCD300,C120,C125
Check / Change
NO
RFS100, L101,
C102, L102,
C109, L104
Check / Change
YES
PAM100
Check & Change
YES
Check the
Battery Block
PAM101 Pin #8
1.2V?
R101, C123
Check & Resolder
Check UCD300 TXP
YES
YES
NO
NO
NO
UCD101 Check
Pin #13 >2.8V?
UCD101 check
Pin#31 :26Mhz?
Vpp:1.2V
OSC100
Check & resolder
YES
UCD101 pin#7
any signal ?
NO
YES
NO
UCD101
Check & resolder
Change PAM100
YES
PAM100
Pin#1
4~5dBm ?
NO
C131, UCD300
Check or resolder
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