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SGH-E310 Flow Chart of Troubleshooting and Circuit Diagrams
2-
11
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F900 CHECK
pin8 ≥ -65dBm ?
2.RF
1. EGSM RX
CONTINUOUS RX ON
RF INPUT : 62CH
AMP : -50dBm
NORMAL CONDITION
catch the channel?
CHECK
ANT701,L905 contact ?
U800
pin 9,32: 2.8V ?
F900 CHECK
pin2,3 ≥ -65dBm ?
U800 CHECK
pin20,21 ≥ -65dBm ?
C900, F901
resolder or change
F900
resolder or change
C912,C913,L901
resolder or change
U102 pin39, C112
change or resolder
U800 CHECK
pin 8 : 13MHz ?
Vp-p : 950mV?
OSC801
change or resolder
U800
resolder or change
U701 CHECK!!
U800
pin1,2,3,28 Vp-p
: 120mV ?
NO
YES
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES
