Thursday, September 3, 2015
Samsung galaxy S2 GT-I9100 WCDMA Band2 / GSM1900 RX Network Not Working Solution
Step 2
Check C107 ≤ -65dBm ?CHECK soldered
RFS100, L107,C107,L108
Step 3
Check the Voltage atC102 = VBATT ?
Resolder or change
U101, C102
Step 4
Check L103, L106≥ -65dBm ?
Resolder or change
L103, L106
Step 5
Check componentsoldering status OK at
F100
Resolder or change
F100
Step 6
Check F100 PIN 16, 17≥ -65dBm
Resolder or change
F100
Step 7
Check the voltage at{C138 = VOUT_CHARGER ?}
& {C169, C170, C171
= VOUT_CHARGER?}
& {C137, C174 = 2.85V ?}
& {C134, C176 = 2.65V ?}
& {C136, C178 = 1.8V?}
& {C135, C175, C173 = 1.2V?}
Resolder or change
U104
Step 8
Check the freq. at C123: 26MHz ?
Change or resolder
OSC100
Step 9
WCDMA band2/GSM1900Receiver is O.K?
Resolder or change
UCP300
Step10
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Samsung galaxy S2 GT-I9100 GSM1800 RX 2G NETWORK Not Working Solution
Step 2
RFS100, L107,C107,L108
Step 3
Check the Voltage atC102 = VBATT ?
Resolder or change
U101, C102
Step 4
Check C101, L101≥ -65dBm ?
Resolder or change
C101, L101
Step 5
Check componentsoldering status OK at
F100
Resolder or change
F100
Step 6
Check F100 PIN 18, 19≥ -65dBm
Resolder or change
F100
Step 7
Check the voltage at{C138 = VOUT_CHARGER ?}
& {C169, C170, C171
= VOUT_CHARGER?}
& {C137, C174 = 2.85V ?}
& {C134, C176 = 2.65V ?}
& {C136, C178 = 1.8V?}
& {C135, C175, C173 = 1.2V?}
Resolder or change
U104
Step 8
Check the freq. at C123: 26MHz ?
Change or resolder
OSC100
Step 9
GSM1800 Receiver is O.K?Resolder or change
UCP300
Step 10
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Samsung galaxy S2 GT-I9100 WCDMA Band1 RX 3G Network Not Working Solution
Samsung galaxy S2 GT-I9100 WCDMA Band1 RX 3G Network Not Working Solution Step By Step
Step 2
Step 3
Step 4
Step 5
Step 6
Step 7
Step 8
Step 9
Step 10
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Wednesday, September 2, 2015
Samsung GT-C3322 Metro Duos GSM850 Receiver 2G Network not Working Solution
Samsung GT-C3322 Metro Duos GSM850 Receiver not Working Solution Schematic, Diagram , Circuit
Samsung GT-C3322 Metro Duos GSM850 Receiver not Working Solution Step by Step
Step 1
Normal conditionCatch the channel?
Check Ant and Resoleder
L100,C124,C117,L103,C120
Step 2
RFS100Pin 2
>= -60dBm
Resolder RFS100,L104,L101
Step 3
PAM100Pin 15
>= -70dBm
Check PAM100
Step 4
PAM100Pin 17
>= -70dBm
Check F102,L112,C142
Step 5
F102Pin 6,7
>= -75dBm
Check C139,L111,C143
(crack,open,etc)
Step 6
Check UCP200Search Tags
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Samsung galaxy S2 GT-I9100 2M FRONT CAMERA Not Working Solution
Step 2
Step 3
Check the voltageC533 = 1.2V
C714 = 2.8V
C712 = 1.5V
C549 = 1.8V
C553 = 1.8V
Resolder U903,R905,R907,L903
Resolder U703, C713, C714
Resolder U702, C711, C712
Resolder C549
Resolder C553
Step 4
Check R703 is 24MHzResolder R703
Replace the PBA.
Step 5
Check F705Resolder F705
Replace the PBA.
Step 6
Replace the camera moduleStep 5
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