Samsung SGH-P408 Service Manual page 25

7. EGSM Reciever
C O N T IN U O U SR XO N
R FIN P U T: 62C H
A M P: -50d B m
N O R M A LC O N D IT IO N
catchth e ch an n el?
U1005 C HEC K
pin15 ¡Ã- 65dBm ?
U 1005 C H E C K
p in 1, 2 ¡Ã -65d B m?
U 901 C H E C K
p in 21,22 ¡Ã -65d B m?
U 901
p in12,13¡Ã
-20d B m?
Y E S
U 901 C H E C K
p in14,23,26,32:
clean2.8V ?
Y E S
U 901 p in 3,4
V p -p: 240m V ?
Y E S
U 901 p in 1, 2
V p -p: 250m V?
Y E S
U 900 p in2,3,4,5
V p -p: 100m V?
Y E S
Y E S
Y E S
Y E S
Y E S
N O
U 902 C H E C K
p in 5,25,28 :
3V?
Y E S
U 902 C H E C K
p in7 : 13M H z ?
V p -p: 860m V ?
Y E S
U 902 ch an ge or
resold er
N O
U 100p in 39, C 111
ch eckor resold er
N O
N O
resold er or ch an ge
N O
C H E C K
U 700
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SG H- P408 F low Chart of Troubleshooting
N O
C h ecksold eredstatu s of
L 1000, L 1003
C N 1001
N O
resold er or ch an ge
U 1005
N O
resold er or ch an ge
N O
C 1003,C 1004,L 1001
resold er or ch an ge
N O
U 100p in 33 , C 110
ch eckor resold er
N O
O SC 801 C H E C K
p in3 : 13M H z ?
V p -p: 950m V ?
Y E S
C 804,R 803
resold er
N O
U 900 C H E C K
p in 6, 20 : 2.8V?
Y E S
U 900
resold er or ch an ge
U 901
3- 13
N O
N O
O SC 801 C H E C K
p in4 : clean
3V?
Y E S
O SC 801 ch an ge or
resold er
U 100p in 33, C 110
ch eckor resold er