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Flow Chart of Troubleshooting
3-18
3-2-3. GSM Tx
Check U304
pin #4 is
about 2.8?
Check and change
RFS100, C101,
L111,
L
100
Yes
No
CONTINUS TX ON CONDITION
TX POWER DAC : 554 CODE
APPLIED
CH : 62ch
RBW : 100KHz
VBW : 100KHz
SPAN : 10MHz
REF LEV : 10dBm
ATT : 20dB
Yes
No
Yes
UCD101 pin #14
is 3.7V ?
No
Yes
UCD101 pin #2
is 1.8V ?
No
Yes
UCD101 pin #21
is about 26mHz?
No
Yes
UCD101 pin #20
is about 26mHz?
Yes
No
1
3
UCD101 pin #17
is 2.9V ?
No
Yes
No
Check U304
pin #17 is
about 4~5dbm? :
2.8V ?
Check U304
pin #11 is
about 2~3dbm?
Check UCD101
pin #10 is
about 4~5dbm?
No
Yes
Check and resolder or change
UCD101
Check and resolder or change
U304
Check and change
Battery, UCD107
Check UCD107
2
5
6
Check OSC101
7
Check and resolder or change
C119, R102
4
3
Check and resolder or change
UCD101
2
Check and resolder or change
UCD101
2
Check UCD107
6
Содержание SGH-C260
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