SAMSUNG Proprietary-Contents may change without notice
SGH-E710 Flow Chart of Troubleshooting and Circuit Diagrams
2-
10
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8. EGSM Receiver
Continuous RX ON
RF Input : 62 CH
AMP : -50dBm
NORMAL CONDITION
Catch the channel ?
YES
NO
F400 Check
Pin #6 ≥ -65dBm ?
F400 Check
Pin #11 ≥ -65dBm ?
U401 Check
Pin#20,21 ≥ -65dBm ?
Check soldered status of
C400,402
CN400
Resolder or Change
F400 Resolder or Change
U401 Check
Pin#9,32=Clean 2.8V?
U401 Check
Pin#28,1,2,3=100mV?
U100,C106,C112
Check or resolder
Check U300
NO
NO
YES
YES
YES
YES
NO
YES
U401 Check
Pin #8 : 13MHz ?
Vpp : 860mV?
OSC400 Check
Pin #8 : 13MHz ?
Vpp : 950mV?
OSC400 Check
Pin #4 = 2.8V ?
U401
Change or resolder
NO
NO
NO
R412,C426
resolder
OSC400
Change or resolder
YES
YES
YES
NO
Check soldered status of
C415,417,L406,F403
F403 Check
Pin #1 ≥ -65dBm ?
Check soldered status of
L410 &
F400 Resolder or Change
NO
YES
NO
