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Flow Chart of Troubleshooting
3-21
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3-2-3. EGSM TX
PAM100
pin
12
:
about 2~3 dBm?
C101,RFS100
check&change
PAM100
pin6 : 2.8 V?
UCP301
check & change
PAM100
pin7 : 3.7 V?
NO
NO
YES
YES
NO
BATTERY
check & change
PAM100
pin 8 : 1.6V ?
YES
NO
PAM100 pin11
about : -5dBm ?
YES
PAM100
pin 4 : 2.9V?
YES
YES
PAM100
change or resolder
NO
UCP301
check
R135
Check
NO
U102
pin13 : 2.9V ?
UCP301
pinA13
,C314
change or resolder
YES
U102
pin30,31 : 26MHz
?
Vp-p : 380mV?
U102
pin4,5,6,7 :
100mV?
YES
UCP301
change or resolder
NO
NO
U102
change or resolder
YES
NO
OSC100
change or resolder
CONTINOUS TX ON CONDITION
TX POWER DAC: 600 CODE APPLIED
CH : 62
RBW : 100KHz
VBW : 100KHz
SPAN : 10MHz
REF LEV. : 10dBm
ATT. : 20dB