Level 3 Repair
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Confidential and proprietary-the contents in this service guide subject to change without prior notice.
8-36
Check C139
≤
-65dBm ?
8-3-15. GSM1800 RX
CONTINUOUS RX ON
RF INPUT : 698 CH
AMP : -50dBm
NORMAL CONDITION
catch the channel?
Check the voltage at
{C169 = VBAT_RF ?}
& {C168 = 2.85V ?}
& {C164 = 2.65V ?}
& {C170 = 1.8V?}
& {C171 = 1.2V?}
Check the Voltage at
C142 =VOUT_CHARGER
Check component
soldering status OK at
F100
CHECK soldered
RFS100,L101,C139
Resolder or change
U106, C142
Resolder or change
F100
Resolder or change
U101,C164,C168,C169,C170,C171
Check the freq. at C158
: 26MHz ?
Change or resolder
OSC100
Check C143,L135
≥
-65dBm ?
Resolder or change
C143,L135
GSM1800 Receiver is O.K?
Resolder or change
UCP300
END
NO
YES
NO
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
Check F100 PIN 18, 19
≥
-65dBm
Resolder or change
F100
NO
YES
Summary of Contents for GT-N8000
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