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Level 3 Repair
8-3-21. WCDMA1900 RX
NORMAL CONDITION
Catch the channel?
YES
Check F100
Pin#3
-55dBm
YES
Check F100 VBAT
Pin#9
2.5V
YES
Check F100 ENABLE
C142
2V
C143,C144,C145
0V
YES
Check U101
Pin#33,Pin#34
-55 dBm
YES
Check TCXO CLOCK
19.2MHz @ C210
YES
Check U101
YES
END
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NO
NO
RFS100, C112, C116, C103
NO
NO
C193,C194,C197,C203
NO
NO
NO
8-34
Band : WCDMA1900
CELL power : -50dBm
Channel : 9800Ch
check ANT contact
change or re-solder
Change PBA
Change PBA
L123,L126,L124
re-solder or change
OSC100,C210
re-solder or change
U101
re-solder or change
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