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SGH-E400 Flow Chart of Troubleshooting and Circuit Diagrams
3. PCS Receiver
CONTINUOS RX ON
RF INPUT : 698CH
Cell power : -50dBm
NORMAL CONDITION
catch the channel?
YES
F1002 CHECK
pin13 ≥ -65dBm?
YES
F1002 CHECK
pin6 ≥ -65dBm?
YES
F1005 CHECK
pin4,6 ≥ -65dBm?
YES
U901 CHECK
pin17,18 ≥ -65dBm?
YES
U901
pin 12,13 ≥
20dBm?
YES
U901 CHECK
pin14,23,26,32 :
3V?
YES
U901 Pin3,4
Vp-p:240mV ?
YES
NO
U901 Pin1,2
Vp-p:250mV ?
YES
U900
Pin2,3,4,5
Vp-p:100mV ?
NO
L1006,C1015,L1016
resolder or change
NO
CHECK
C1012,L1015,L1016 contact?
NO
CN1001
resolder or change
NO
F1002
resolder or change
NO
F1005
resolder or change
NO
L1006,C1015,C1019
resolder or change
NO
U902 CHECK
pin5,25,28 : 3V?
YES
U902 CHECK
pin 7 : 13MHz?
YES
U902
change or resolder
NO
U100, PIN 46, C114
resolder or change
NO
U900 CHECK
pin 6,20 : 2.8V?
YES
U900
resolder or change
YES
SAMSUNG Proprietary-Contents may change without notice
This Document can not be used without Samsung's authorization
NO
U100, PIN39, C116
check or resolder
OSC801
NO
CHECK
pin 3 : 13MHz ?
V p-p : 950mV?
YES
C808, R805
resolder
NO
4-12
NO
OSC801
NO
CHECK
pin 4 : clean
3V?
YES
OSC801
change
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