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SGH-D410 Flow Chart of Troubleshooting and Circuit Diagrams
2-
12
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5. DCS/PCS TX
F1001 pin 10 :
about 2~3 dBm?
F1003, C1003
check&change
F1001
pin9 : 2.8 V?
U701,U703,U704
check & change
U1001 pin11 :
about 4~5dBm?
F1001
check & change
U1001
pin 4,5 : 3.7 V?
NO
NO
YES
YES
YES
NO
NO
BATTERY, U102
check & change
U1001
pin 6 : 1.2V ?
YES
NO
U1001 pin1
about : -5dBm ?
YES
U1001
pin 3 : 3V?
YES
YES
U1001
change or resolder
NO
U701
check
U701
check
NO
U902
pin9 : 2.8V ?
U102 pin39,C112
change or resolder
YES
U903
pin8 : 13MHz ?
Vp-p : 950mV?
U902
pin1,2,4,5:100mV?
YES
U701
change or resolder
NO
NO
U902
change or resolder
YES
NO
OSC801
change or resolder
CONTINUOUS TX ON CONDITION
CH : 698CH(DCS),660CH(PCS)
TX POWER CODE: 350 CODE Aplied
RBW : 100KHz
VBW : 100KHz
SPAN : 10MHz
REF LEV. : 10dBm
ATT. : 20dB
