Samsung SGH-T519 Service Manual page 78

Flow Chart of Troubleshooting
10-2-6. DCS1800 & PCS1900 TX
NO
F100 Pin#17
About 2~3 dBm?
YES
RFS101, C100
Check / Change
C108
= 3.7V?
Level of
PAM101
Pin #6 is
1.2V?
YES
PAM101
pin#12
About -5 dBm?
PAM101 pin#1
High ?
⑤
Change PAM101
UCD100 Check
Pin#34 ≥ 2.8V ?
UCD100 Check
Pin #21 : 26MHz ?
Vpp : 1.2V?
NO
UCD100 Pin
#38, = 1.7V?
⑤
⑨
Change PAM101
Check U102
This Document can not be used without Samsung's authorization
F100
Pin#11 = High?
YES
Level of
NO
F100 Pin#10 is
4~5dBm ?
YES
②
F100
Check & Change
NO
Check the
Battery Block
YES
NO
UCD100 pin#3
is high?
YES YES
④
Check & Resolder
NO
①
NO
Check UCD301
YES
NO
YES
NO
Pn#1 : Freq=26MHz,
YES
⑧
Check & resolder
YES
SAMSUNG Proprietary-Contents may change without notice
①
NO
UCD301
Check / Change
③
NO
Check
Check UCD301 TXP
R104
⑥
C113, UCD301
Check or resolder
⑦
TCX101 Check NO
Vpp=1.2V?
YES
UCD100
10-32
TCX101
Check & resolder