Samsung SGH-P400 Service Manual page 28

9. DCS Reciever
C O N T IN U O U SR XO N
R FIN P U T: 698C H
A M P: -50d B m
N O R M A LC O N D IT IO N
catchth e chan n el?
Y E S
U1005 C HE CK
pin15 ¡Ã- 65dBm?
Y E S
U1005 CHEC K
pin 3,4 ¡Ã- 65dBm?
Y E S
U 901 C H E C K
p in 19,20 ¡Ã -65dB m?
Y E S
N O
U 901
p in12,13¡Ã
-20d B m?
Y E S
U 901 C H E C K
p in
14,23,26,32:
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 pin
2,3,4,5 V p-p
: 100m V?
Y E S
N O
N O
N O
N O
U 902 C H E C K
p in5,25,28 :
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 cha nge or
r esold er
N O U 100p in 39, C 111
checkor r esolder
N O U 900 C H E C K
pin 6, 20 :
2.8V?
Y E S
U 900
r esold er or ch an ge
N O
U 901
r esold er or ch an ge
N O
C H E C K
U 700
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SG H- P400 F low Chart of Troubleshooting
C h ecksold er edstatu s of
L 1000, L 1003
C N 1001
resolder orcha nge
U 1005
resolder orcha nge
C 1005,C 1006,L 1002
resolder orcha nge
N O
U 100pin 33 , C 110
checkor r esolder
N O
O SC 801 C H E C K
pin3 : 13M H z ?
V p -p: 950m V ?
Y E S
R 803,C 804
ch ange or resolder
N O
U 100 p in 33, C 110
checkor r esolder
3- 17
N O
N O
O SC 801
C H E C K
pin4 : clean
3V?
Y E S
O SC 801 ch an ge or
r esold er