Samsung SGH-B500 Service Manual page 54

10-2-3. EGSM TX
PAM100 pin :
11
about 2~3 dBm?
YES
RFS100,C101,
L101,L102
check&change
PAM100
pin1 : 3.7 V?
YES
PAM100
pin 3 : 1.6V ?
YES
NO
PAM100 pin17
about : -5dBm ?
YES
PAM100
pin 5 : 2.9V?
YES
PAM100
change or resolder
NO
UCD300
pinF3,C316,C317
change or resolder
SAMSUNG Proprietary-Contents may change without notice
NO
NO
PAM100
pin4 : 2.8 V?
YES
NO
BATTERY
check & change
NO
R100
Check
NO
UCP200
check
RFT100
pin17 : 2.8V ?
YES
RFT100
pin19,20 : 26MHz
?
Vp-p : 380mV?
YES
RFT100
NO
pin2,3,22,23
:100mV?
YES
UCD300
change or resolder
RFT100
change or resolder
This Document can not be used without Samsung's authorization
UCD300
check & change
NO
OSC100
change or resolder
10-19
Flow Chart of Troubleshooting
CONTINOUS TX ON CONDITION
TX POWER DAC: 600 CODE APPLIED
CH : 62
RBW : 100KHz
VBW : 100KHz
SPAN : 10MHz
REF LEV. : 10dBm
ATT. : 20dB