Flow Chart of Troubleshooting and Circuit Diagrams
10-19
UCD100 CHECK
pin12
≥
-65dBm ?
10-2.RF
10-2-1. EGSM RX
①
NORMAL CONDITION
catch the channel?
NO
CHECK
ANT101,ANT102,L101,
L102,L104,L105,C105,
C113,C139,R106
YES
②
NO
RFS100,
C105,L101,L104,L105,C113
resolder or change
YES
③
UCD100 CHECK
pin16
≥
-65dBm ?
NO
UCD100
resolder or change
④
YES
NO
C101,F100,C100,
C104,L100
resolder or change
U100 CHECK
pin24,25
≥
-65dBm ?
⑤
⑥
⑦
YES
CHECK& RESOLDER
U100
YES
NO
CHECK& RESOLDER
UCD300
OSC100 CHECK
PIN3:26MHz?
CHECK& RESOLDER
OSC100
UCD300
resolder or change
NO
U100 CHECK
pin4,5,6,7 Vp-p :
800mV
U100
CHECK
pin35 : 26MHz ?
YES
YES
YES
NO
NO
U100
resolder or change
the power source
of UCD100
Summary of Contents for SGH-J610
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