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SGH-E850 Flow Chart of Troubleshooting
2-
15
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2.RF
1. GSM RX
NORMAL CONDITION
catch the channel?
F700 CHECK
pin8
≥
65dBm ?
F700 CHECK
pin2, 3
≥
65dBm ?
U700 CHECK
pin20,21
≥
65dBm
U700 check
pin 9,31 :clean 2.8V
NO
YES
check
L700,C728,L707 contact or
INTENNA CONTAC ?
CON700
resolder or change
F700
resolder or change
C703,L701,C705
resolder or change
U100 Pin A13, C109
check or resolder
CONTINUOUS RX ON
RF INPUT : 62CH
AMP : -50dBm
CHECK
U100
NO
YES
NO
YES
NO
NO
YES
YES