Advertisement
SGH-X400 Flow Chart of Troubleshooting
8. EGSM Reciever
NORMAL
CONDITION
catch the channel?
YES
F1001 CHECK
pin15 ≥ -65dBm ?
YES
F1001 CHECK
pin1, 2 ≥ -65dBm ?
YES
U902 CHECK
pin21,22 ≥ -65dBm ?
YES
U902
pin 12,13≥
-20dBm ?
YES
U902 CHECK
pin
14,23,26,32:
clean 2.8V?
YES
U902 pin3,4
Vp-p :
240mV?
YES
U902 pin1, 2
Vp-p :
250mV ?
YES
U901 pin
2,3,4,5 Vp-p
: 100mV ?
YES
NO
CHECK
L1001, L1002, L1005
contact ?
NO
CN1001
resolder or change
NO
F1001
resolder or change
NO
L1003, C1005, C1006
resolder or change
NO
U903
CHECK
pin 25,28 :
3V ?
YES
U903
CHECK
pin 7 :
13MHz ?
Vp-p :
860mV?
YES
U903 change or
resolder
NO
U102 pin39, C112
check or resolder
NO
U901 CHECK
pin6, 20 :
2.8V ?
YES
U901
resolder or change
NO
U902
resolder or change
NO
CHECK
U701
SAMSUNG Proprietary-Contents may change without notice
This Document can not be used without Samsung's authorization
CONTINUOUS RX ON
RF INPUT : 62CH
AMP : -60dBm
NO
U102 pin33, C111
check or resolder
OSC801
NO
CHECK
pin 3 :
13MHz ?
Vp-p :
YES
C1063, R804
resolder
NO
4-14
NO
NO
OSC801
C
HECK
pin4:clean 3V?
YES
change or
OSC801
resolder
Advertisement
