Samsung GT-P6800 Servise Manual page 85

Level 3 Repair
8-3-21. WCDMA Band2 / GSM1900 RX
NORMAL CONDITION
catch the channel?
Check C111 ≤ -65dBm ?
Check the Voltage at
C109 = V_BAT ?
Check C108, L101
≥ -65dBm ?
Check component
soldering status OK at
Check F100 PIN 16, 17
≥ -65dBm
Check the voltage at
{C152 = VBAT_RF ?}
& {C159,C161 = V_BAT?}
& {C151, C167 = 2.85V ?}
& {C147, C164 = 2.65V ?}
& {C150, C169 = 1.8V?}
& {C149, C165, C168) = 1.2V?}
Check the freq. at C132
: 26MHz ?
WCDMA B2 / GSM1900
Receiver is O.K?
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.
NO
YES
NO
NO
YES
NO
YES
NO
F100
YES
NO
YES
YES
NO
YES
NO
END
CHECK soldered
RFS1001, C111, L105
Resolder or change
U101, C109
Resolder or change
C108, L101
Resolder or change
F100
Resolder or change
F100
NO
Resolder or change
U104
Change or resolder
OSC100
Resolder or change
UCP300
8-54
CONTINUOUS RX ON
RF INPUT : 9880CH
AMP : -50dBm