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SGH-X300 Flow Chart of Troubleshooting
2-19
2-2-4. GSM Tx
Check U101
pin 15 : about
2~3 dbm?
Check U101
pin 6 : 2.8V ?
Check and
change
CN100
,
L100
Yes
Check and
change
U300
,
U200
No
CONTINUS TX ON CONDITION
TX POWER DAC : 554 CODE
APPLIED
CH : 62ch
RBW : 100KHz
VBW : 100KHz
SPAN : 10MHz
REF LEV : 10dBm
ATT : 20dB
U102 pin 11 :
about 4~5dbm?
Yes
No
Yes
U102 pin 7 :
3.7V ?
U101
check & change
No
Battery,
U200
check & change
Yes
U102 pin 8 :
1.2V ?
No
U200
check
Yes
U102 pin 6 :
3V ?
No
U200
check
U101 pin 12,13,
28,29 : 2.9V ?
U102
change or resolder
U200
change or resolder
No
Yes
U101
change or resolder
Yes
U102 pin 12
:
about -5dbm?
No
Yes
No
1
2
3
4
4
4
4
3
Содержание SGH-X300
Страница 10: ...SGH X300 Flow Chart of Troubleshooting 2 6 ...
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Страница 19: ...SGH X300 Flow Chart of Troubleshooting 2 15 1 2 3 4 5 ...
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Страница 24: ...SGH X300 Flow Chart of Troubleshooting 2 20 4 2 2 1 3 ...
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