Wcdma Band2/Gsm1900 Rx - Samsung GT-I9300 Service Manual

Gsm telephone
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8-3-21. WCDMA Band2 / GSM1900 RX
NORMAL CONDITION
catch the channel?
Check C117 ≤ -65dBm ?
Check the Voltage at
C110 = VBATT ?
Check L105, L107
≥ -65dBm ?
Check component
soldering status OK at
F100
Check F100 PIN 16, 17
≥ -65dBm
Check the voltage at
{C148= VOUT_CHARGER ?}
& {C158,C159, C160
= VOUT_CHARGER?}
& {C147, C172 = 2.85V ?}
& {C144, C170 = 2.65V ?}
& {C146, C174 = 1.8V?}
& {C173, C171, C145 = 1.2V?}
Check the freq. at
OSC100 PIN 1 : 26MHz ?
WCDMA band2/GSM1900
Receiver is O.K?
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.
NO
YES
NO
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
CHECK soldered
RFS100, L109, C116, C117
Resolder or change
U103, C110
Resolder or change
L105, L107
Resolder or change
F100
Resolder or change
F100
Resolder or change
U108
Change or resolder
OSC100
Resolder or change
UCP300
8-71
Level 3 Repair
CONTINUOUS RX ON
RF INPUT : 9880CH
AMP : -50dBm

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