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2.RF
1. EGSM RX
NORMAL CONDITION
catch the channel?
YES
F900 CHECK
pin8 ≥ -65dBm ?
YES
F900 CHECK
pin2,3 ≥ -65dBm ?
YES
U800 CHECK
pin20,21 ≥ -65dBm ?
YES
U800
pin 9,32: 2.8V ?
YES
U800 CHECK
pin 8 : 13MHz ?
Vp-p : 950mV?
YES
U800
pin1,2,3,28 Vp-p
: 120mV ?
YES
U701 CHECK!!
SGH-E300 Flow Chart of Troubleshooting and Circuit Diagrams
NO
CHECK
ANT701,L905 contact ?
NO
C900, F901
resolder or change
NO
F900
resolder or change
NO
C912,C913,L901
resolder or change
NO
U102 pin39, C112
change or resolder
NO
OSC801
change or resolder
NO
U800
resolder or change
SAMSUNG Proprietary-Contents may change without notice
This Document can not be used without Samsung's authorization
2-11
CONTINUOUS RX ON
RF INPUT : 62CH
AMP : -50dBm
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