Flow Chart of Troubleshooting
9-
23
9-2-4. GSM Transmitter
F100
pin 11 : 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 pin8
3~6dBm?
YES
F100,C102
check & change
NO
1
PAM101/C105
check & change
YES
3
PAM101 pin 4 : 3.7V
NO
BATTERY, BATTERY CONNECTOR
check & change
4
YES
PAM101 pin 2 : 'LOW'
NO
5
U300
check & change
YES
6
U300
check & change
PAM101
pin 3: 'HIGH'
NO
YES
PAM101
pin 6 : 1.2V
?
NO
YES
NO
PAM101 pin
7
: -5dBm?
YES
PAM101
change&resolder
7
U103
pin23 :
7~11
dBm?
U103
pin8 13MHz
Vp-p :950mV
U103
change or
resolder
U103
pin4,5,6,7
1.7V
U103
check &
change
C120
change or resolder
TCX100
pin 3 : 13MHz
Vp-p : 950mV
TCX100
pin 4 : 2.8V ?
U103
change or resolder
U300
change or resolder
U103
change or
resolder
NO
NO
NO
YES
NO
YES
YES
NO
YES
YES
NO
8
U300
change
9
10
11
14
12
13
F100 pin 13
about
2~5dBm?
Содержание SGH-X810
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