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SGH-S342i Flow Chart of Troubleshooting
2-
7
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F700 CHECK
pin13
≥
-65dBm ?
2.RF
1. EGSM RX
CONTINUOUS RX ON
RF INPUT : 62CH
AMP : -50dBm
NORMAL CONDITION
catch the channel?
CHECK
ANT700,R708 contact ?
U700
pin 9,31: 2.8V ?
F700 CHECK
pin1,2
≥
-65dBm ?
U700 CHECK
pin20,21
≥
-65dBm ?
C732,CN700
resolder or change
F700
resolder or change
resolder or change
U100 pinA13, C119
change or resolder
U700 CHECK
pin 8 : 13MHz ?
Vp-p : 950mV?
OSC700
change or resolder
U700
resolder or change
U100 CHECK!!
U700
pin1,2,3,28 Vp-p
: 120mV ?
NO
YES
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES