Samsung SGH-B100 Service Manual page 50

10-2-4. DCS Tx
Check
PAM100 pin 16
: about 2~3
Yes
Check and change
RFS100,L107,L108,
C103,C105,L101
PAM100 pin 1 :
3.7V ?
PAM100 pin 3 :
1.2V ?
PAM100 pin 11
about -5dbm?
PAM100 pin 1 :
2.8V ?
PAM100
change or resolder
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Check
No
PAM100
pin 4 : 2.8V ?
Yes
No
PAM100 pin19:
about 4~5dbm?
Yes
U300
check & change
No
Battery,
check & change
Yes
No
PAM100
Yes
No
:
Yes
No
UCP300
check
Yes
No
Check and
change
UCP200,UCP300
PAM100
check
U103 pin
2,3,22,23 :
100mV ?
Yes
U103
change or resolder
10-19
Flow Chart of Troubleshooting
CONTINUS TX ON CONDITION
TX POWER DAC : 560 CODE
APPLIED
CH : 698CH(DCS),
660CH(PCS)
RBW : 100KHz
VBW : 100KHz
SPAN : 10MHz
REF LEV : 10dBm
ATT : 20dB
No
UCP300
change or resolder