Dcs Receiver - Samsung SGH-S300 Service Manual

SGH-S300 Fl ow Chart of Troubl eshooti ng and Ci rcui t Di agram s
2. D CS Recei ver
CO N T I N U O S R X O N
R F I N PU T : 698C H
Cel l pow er : -50dB m
N O R M A L CO N D I T I ON
cat ch t he channel ?
YES
F1002 C H EC K
pi n13 ¡ˆ-65dB m ?
YES
F1002 C H EC K
pi n6 ¡ˆ -65dB m ?
YES
U 901 C H EC K
pi n17, 18 ¡ˆ-65dB m ?
YES
U 901
pi n 12, 13 ¡ˆ
20dB m ?
YES
U 901 C H E CK
pi n14, 23, 26, 32 :
3V ?
YES
U 901 Pi n3, 4
V p-p: 240m V ?
YES
N O
U 901 Pi n1, 2
V p-p: 250m V ?
YES
U 900 Pi n2, 3, 4, 5
V p-p: 100m V ?
N O
L1006, C 1015, C 1019
resol der or change
N O
C H EC K
C 1012, L1015, C1002 cont act ?
N O
C N 1001
resol der or change
N O
F1002
r esol der or change
N O
C 1014, C 1017, L1002
r esol der or change
N O
U 902 C H E CK
pi n5, 25, 28 : 3V ?
YES
U 902 CH EC K
pi n 7 : 13M H z?
YES
U 902
change or r esol der
N O
U 100, PI N 46, C114
r esol der or change
N O
U 900 CH EC K
pi n 6, 20 : 2. 8V ?
YES
U 900
r esol der or change
YES
SAMSUNG Proprietary-Contents may change without notice
N O
U 100, PI N 39, C116
check or r esol der
O SC801 CH E CK
N O
pi n 3 : 13M H z ?
V p-p : 950m V ?
YES
C 808, R805
resol der
N O
6-8
N O
N O
O SC 801 C H EC K
pi n 4 : cl ean 3V ?
YES
O SC801
change