Samsung GT-I9295 Service Manual page 147

Level 3 Repair
8-3-39. WCDMA1900 TX
Check L100 at sub b'd :
About 23dBm ?
Check C100 at main b'd :
About 23dBm ?
Check L114 :
About 23dBm ?
Check L112 :
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
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
U500
END
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 L114, F101
if no, resolder or change U400
Check the voltage at C110 > 1.0V
if yes, resolder or change L112, F102, PA103
if no, check solder state L302, U301, L301
NO
Resolder or change
U400
Resolder or change
OSC400
8-104
CONTINUOUS TX ON CONDITION
APPLIED
WCDMA 1900 CH : 9400
RBW : 100KHz
VBW : 100KHz
SPAN : 10MHz
REF LEV. : 10dBm
ATT. : 20dB