Samsung GT-C5510 - Page 34

SAMSUNG Proprietary-Contents may change without notice
Flow Chart of Troubleshooting
9-11
This Document can not be used without Samsung's authorization
U100
CHECK
pin
2
≥
-65
dBm
?
9-2.
RF
9-2-1.
GSM
850
RX
CONTINUOUS RX ON
RF INPUT
: 190
CH
AMP
:-50
dBm
NORMAL CONDITION
catch the channel?
CHECK soldered
ANT contact, C114, C115
U100
CHECK
pin1
2, 13
≥
-65
dBm
?
U100
pin12,
13
Vp-p
: 120
mV
?
U100,
RFS
100
resolder or change
U100
resolder or change
UCP300
resolder or change
NO
YES
NO
NO
NO
YES
YES
YES
YES
U100
CHECK
pin
7
:
2.9V ?
U100
resolder or change
YES
NO
GSM Receiver is O.K?
NO
GSM RX path component
resolder or change
END