Samsung SGH-T519 Service Manual page 73
Gsm telephone
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Also See for SGH-T519:
- User manual (210 pages) ,
- Guía del usuario (141 pages) ,
- User manual (46 pages)
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10-2-2. GSM1800 RX
Continuous RX ON
RF Input : 62 CH
AMP : -50dBm
NORMAL CONDITION
Catch the channel ?
YES
F100 Check
Pin #17 ≥ -65dBm ?
YES
F100 Check
Pin #3,4 ≥ -65dBm ?
YES
UCD100 Check
Pin#8,9 ≥ -65dBm ?
YES
UCD100 Check
Pin#27 =1.8V ?
YES
UCD100 Check
Pin#34 =Clean 2.8V?
YES
UCD100 Check
Pin#35,36,37,38=100mV?
YES
Check UCD301
This Document can not be used without Samsung's authorization
NO
NO
NO
NO
NO
NO
NO
UCD100 Check
Pin #21 : 26MHz ?
Vpp : 1.1V?
YES
⑥
UCD100
Change or resolder
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①
Check soldered status of
L103, C101, C104, L101
②
RFS101, C100
Resolder or Change
③
F100 Resolder or Change
④
Check soldered status of
R135, R136, L106
CHECK UCD301
⑤
C113, UCD301
Check or resolder
TCX101 Check
NO
Pn#3 : Freq =26MHz,
Vpp=1.2V?
YES
UCD100
Check & resolder
10-27
Flow Chart of Troubleshooting
⑦
NO
TCX101
Check & resolder
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