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SGH-X140 Flow Chart of Troubleshooting
2-2.RF
2-2-1. EGSM RX
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NORMAL CONDITION
catch the channel?
YES
U402 CHECK
pin8 ≥ -65dBm ?
YES
U402 CHECK
pin2,3 ≥ -65dBm ?
YES
U404 CHECK
pin20,21 ≥ -65dBm ?
YES
U404
pin 9,32: 2.8V ?
YES
U404 CHECK
pin 8 : 13MHz ?
Vp-p : 950mV?
YES
U404
pin1,2,3,28 Vp-p
: 120mV ?
YES
U101 CHECK!!
SAMSUNG Proprietary-Contents may change without notice
NO
CHECK
ANT2,R401 contact ?
NO
C402,U401
resolder or change
NO
U402
resolder or change
NO
C408,C409,L401
resolder or change
NO
U101 pinA13, C111
change or resolder
NO
OSC401
change or resolder
NO
U404
resolder or change
2-10
CONTINUOUS RX ON
RF INPUT : 62CH
AMP : -50dBm
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