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SAMSUNG Proprietary-Contents may change without notice
SGH-S300 Flow Chart of Troubleshooting and Circuit Diagram s
6-9
3. PC S R eceiver
CO N T IN U O S R X O N
R F IN PU T : 698C H
Cell pow er : -50dB m
N O RM A L C O N D IT IO N
catch the channel?
F1002 C H EC K
pin13 ¡ˆ -65dBm ?
F1002 C H EC K
pin6 ¡ˆ-65dB m ?
F1005 C H EC K
pin4,6 ¡ˆ -65dB m ?
U 901 C H E CK
pin17,18 ¡ˆ -65dBm ?
CH E CK
C 1012,L1015,C 1002 contact?
N O
C N 1001
resolder or change
N O
F1002
resolder or change
N O
F1005
resolder or change
N O
L1006,C 1015,C 1019
resolder or change
N O
YES
YES
YES
YES
U 901
pin 12,13 ¡ˆ
U 902 CH EC K
pin5,25,28 : 3V ?
U 902 C H E CK
pin 7 : 13M H z?
OSC 801
CH E CK
pin 3 : 13M H z ?
O SC 801
C H EC K
pin 4 : clean
U 901 CH EC K
pin14,23,26,32 :
U 901 Pin3,4
V p-p:240m V ?
U 900 C H EC K
pin 6,20 : 2.8V ?
U 901 Pin1,2
V p-p:250m V ?
U 900
Pin2,3,4,5
U 100, PIN 39, C116
check or resolder
U 902
change or resolder
C 808, R805
resolder
O SC801
change
U 100, PIN 46, C114
resolder or change
U 900
resolder or change
L1006,C 1015,C 1019
resolder or change
N O
N O
N O
N O
N O
N O
N O
N O
N O
N O
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES