Samsung SGH-E530 - Page 18

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SGH-E530 Flow Chart of Troubleshooting
2-15
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pin#8 of U103
≥
-65dBm
2-1-2. DCS RX
CONTINUOUS RX ON
RF INPUT : 698CH
AMP : -50dBm
NORMAL CONDITION
catch the channel?
CHECK ANT1,C143
ANT2, L101 contact ?
pin#9,32 of U102 = 2.8V
pin#4,5 of U103
≥
-65dBm
pin#18,19 of U102
≥
-65dBm
Check C103,CN100
Check U103
Check C113, C117, L106
Check C421, pinA13 of U401
At U102
pin#8 = 13MHz
Vp-p = 950mV
Check OSC100
Check U102
Check U401
pin#1,2,3,28 Vp-p
of U102 = 120mV
NO
YES
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES