Samsung SGH-S410i Service Manual page 20

2-2-3. PCS RX
Continuous RX ON
RF Input : 660 CH
AMP : -50dBm
NORMAL CONDITION
Catch the channel ?
YES
U106 Check
Pin #9 ≥ -65dBm ?
YES
U106 Check
Pin #2 = High ?
YES
U106 Check
Pin #3 ≥ -65dBm ?
YES
F101 Check
Pin #1 ≥ -65dBm ?
YES
U103 Check
Pin#16,17 ≥ -65dBm ?
YES
U103 Check
Pin#9,32=Clean 2.8V?
YES
U103 Check
Pin#28,1,2,3=100mV?
YES
Check U401
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NO
NO
NO
NO
NO
NO
NO
NO
U103 Check
NO
Pin #8 : 13MHz ?
Vpp : 860mV?
YES
U103
Change or resolder
2-17
SGH-S410i Flow Chart of Troubleshooting
Check soldered status of
L114,L115,C145,L116,C109
C108,L118,V101
Resolder or Change
U401 Check & Change
U106 Resolder or Change
Check soldered status of
C155,L119
Check soldered status of
C111,113,L104,F101
U401,C418,100,130
Check or resolder
OSC101 Check
NO
Pin #3 : 13MHz ?
Vpp : 950mV?
YES
R112,C132
resolder
NO
OSC101 Check
Pin #4 = 2.8V ?
YES
OSC101
Change or resolder