Samsung GT-I9295 Service Manual page 132

8-3-34. GSM850/GSM900 TX
Check L100 at sub b'd :
About 30dBm ?
Check C100 at main b'd :
About 30dBm ?
Check L133 :
About 30dBm ?
Check C136 :
About 0dBm ?
Check the voltage at
C303 = 2.0V
C320 = 1.8V
C302 = 1.3V
Check the freq. at
OSC400 PIN 1 :
19.2MHz ?
Resolder or change
U500
END
Confidential and proprietary-the contents in this service guide subject to change without prior notice.
Distribution, transmission, or infringement of any content or data from this document without Samsung's written authorization is strictly prohibited.
YES
No
YES
NO
YES
NO
YES
NO
&
&
YES
NO
YES
CHECK soldered
Sub b'd L100, ANT100
Re-assembe coaxial cable or
Check solder state RFS100, RFS102,
C100
Check the voltage at C104=2.8V
if yes, resolder or change F101
if no, resolder or change U400
Check the voltage at C107=V_BATTERY
if yes, resolder or change PA103, C136
if no, check solder state L102,C107,C108
NO
Resolder or change
U400
Resolder or change
OSC400
8-89
Level 3 Repair
CONTINUOUS TX ON CONDITION
TX POWER IDX1 APPLIED
GSM850 CH : 190
GSM900 CH : 62
RBW : 100KHz
VBW : 100KHz
SPAN : 10MHz
REF LEV. : 10dBm
ATT. : 20dB