Gsm Tx - Samsung SGH-X160 Service Manual

Flow Chart of Troubleshooting

10-2-3. GSM Tx

Check
UCD101pin 15
: about 2~3
dbm?
Yes
Check and
1
change
RFS100,
L100,L111
PAM100 pin 7 :
3.7V ?
PAM100 pin 8 :
1.2V ?
PAM100 pin 12:
about -5dbm?
PAM100 pin 6 :
PAM100
change or resolder
Check
No
UCD101
pin 6 : 2.8V ?
Yes
No
PAM100 pin 11:
about 4~5dbm?
Yes
UCD101
check & change
No
Yes
No
Yes
No
Yes
No
3V ?
Yes
2
Check and
No
change
UCP201,UCD107
3
1
Battery,
4
UCD107
check & change
5
UCD107 check
3
7
6
UCD107
check
UCD101 pin
12,13,28,29 :
2.9V ?
Yes
UCD101
change or resolder
10-16
CONTINUS TX ON CONDITION
TX POWER DAC : 554 CODE
APPLIED
CH : 62ch
RBW : 100KHz
VBW : 100KHz
SPAN : 10MHz
REF LEV : 10dBm
ATT : 20dB
2 4 5 6 8
2
No
UCD107
change or resolder
7
8