User Guide

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SGH-E810 Flow Chart of Troubleshooting
2-11
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10. DCS Transmitter
Continuous TX ON condition
TX Power Code : 350 code Applied
CH : 660
RBW : 100KHz
VBW : 100KHz
SPAN : 10MHz
REF. Level : 10dBm
ATT. : 20dB
C402
=3.7V?
Change U400
NO
YES
U401 Pin#8
About 2~3 dBm?
U401
Pin#11 = High?
U300,302
Check & Change
NO
C401,CN400
Check & Change
Level of
U401 Pin#3 is
4~5dBm ?
YES
U401,L402,C405,407,408
Check & Change
YES
Check the
Battery Block
Level of
U400 Pin #6 is
1.2V?
Check
&ChangeR401
OK ?
U300
Check & Change
YES
YES
NO
NO
NO
NO
U400 pin#1
About -5 dBm?
U400 pin#3
High ?
Check U300
YES
NO
YES
U404 Check
Pin#9,32 ≥ 2.8V ?
U404 Check
Pin #8 : 13MHz ?
Vpp : 860mV?
OSC400 Check
Pin #3 : 13MHz ?
Vpp : 950mV?
OSC400 Check
Pin #4 = 2.8V ?
NO
YES
NO
NO NO
R413,C428
resolder
OSC400
Change or resolder
YES
YES
YES
NO
U100,C107,C109
Check or resolder
U404 Pin
#4,5,6,7 = 1.7V?
YES
Change U400
Check U300
NO
YES