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Flow Chart of Troubleshooting
3-26
3-2-4. GSM Transmitter
F101
pin 4 : 2.8V
CONTINUS TX ON
CONDITION
MS TX level 19
CH : 62
RBW : 100KHz
VBW : 100KHz
SPAN : 10MHz
REF LEV. : 10dBm
ATT. : 20dB
U300
check &
change
2
NO
NO
YES
PAM101 pin7
3~6dBm?
YES
F101, C101
check & change
NO
1
PAM101/L106
check & change
YES
3
PAM101 pin 4 : 3.7V
NO
BATTERY, BATTERY CONNECTOR
check & change
4
YES
PAM101 pin3: 'LOW'
NO
5
U300
check & change
YES
6
U300
check & change
PAM101
pin 1: 'HIGH'
NO
YES
PAM101
pin 6 : 1.2V
?
NO
YES
NO
PAM101 pin
12
: -5dBm?
YES
PAM101
change&resolder
7
UCD101
pin39 :
7~11
dBm?
UCD101
pin21 13MHz
Vp-p :950mV
UCD101
change or
resolder
UCD101
pin35,36,37,38
1.7V
UCD101
check &
change
C113
change or resolder
OSC101
pin 3 : 13MHz
Vp-p : 950mV
OSC101
change or resolder
UCD101
change or
resolder
NO
NO
NO
YES
YES
YES
NO
YES
NO
8
U300
change
9
10
11
F101 pin 6
about
2~5dBm?
Summary of Contents for SGH-U100
Page 15: ...Flow Chart of Troubleshooting 3 2 ...
Page 37: ...Flow Chart of Troubleshooting 3 24 ...
Page 42: ...Flow Chart of Troubleshooting 3 29 ...
Page 44: ...Flow Chart of Troubleshooting 3 31 ...
Page 54: ...6 PCB Diagrams 6 1 ...
Page 55: ...PCB Diagrams 6 2 ...