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2-2-5. DCS & PCS TX
NO
F100 Pin#6
About 2~3 dBm?
YES
RFS100, C10
Check & Change
C100
= 3.7V?
YES
Level of PAM101
Pin #30 is
1.2V?
YES
YES
PAM101 pin#19
About -5 dBm?
NO
PAM101 pin#45
High ?
YES
Change PAM101
UCD100 Check
Pin#15,16,23,27,31
2.8V ?
UCD100 Check
Pin #17 : 13MHz ?
Vpp : 1.1V?
NO
UCD100 Pin
#4, = 1.7V?
Change PAM101
Check UCD301
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F100
Pin#16 = High?
YES
Level of
NO
F100 Pin#7 is
4~5dBm ?
YES
F100
Check & Change
NO
Check the
Battery Block
NO
Check
UCP301 TXP OK ?
YES
NO
Check UCP301
NO
YES
NO
R118 = 13MHz ?
Vpp : 1.2V?
YES
YES
SGH-E770 Flow Chart of Troubleshooting
NO
UCP301
Check & Change
Continuous TX ON condition
TX Power Code : 500 code Applied
NO
Check & Change
C17,18,114,152,UCP301
Check or resolder
NO
YES
C141, R118
resolder
CH : 62
RBW : 100KHz
VBW : 100KHz
SPAN : 10MHz
REF. Level : 10dBm
ATT. : 20dB
UCP301
NO
R116 = 1.5V ?
YES
OSC101
Change or resolder
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