Samsung SGH-E530 - Page 19

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SGH-E530 Flow Chart of Troubleshooting
2-16
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2-1-3. EGSM TX
U103 pin#13
=about2~3
dBm
C103,CN100
check&change
U103
pin#1 = 2.8V
U401
check & change
U101 pin#11=
about 4~5dBm?
U103
check & change
U101
pin#6,17=3.7V
NO
NO
YES
YES
YES
NO
NO
BATTERY
check & change
U101
pin#20 = 1.6V
YES
NO
U101 pin#4
about =-5dBm
YES
U101
pin#18 = 3V
YES
YES
U101
change or resolder
NO
U401
check
U401
check
NO
U102
pin#9,32 =2.8V
U401 pinA13,C421
change or resolder
YES
U102
pin#8 = 13MHz
Vp-p = 950mV
U102
pin#4,5,6,7
=100mV
YES
U401
change or resolder
NO
NO
U102
change or resolder
YES
NO
OSC100
change or resolder
CONTINOUS TX ON CONDITION
TX POWER DAC : 600 CODE APPLIED
CH : 62
RBW : 100KHz
VBW : 100KHz
SPAN : 10MHz
REF LEV : 10dBm
ATT : 20dB