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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 condition
Catch the channel?

Check Ant and Resoleder
L100,C124,C117,L103,C120

Step 2

RFS100
Pin 2
>= -60dBm

Resolder RFS100,L104,L101

Step 3

PAM100
Pin 15
>= -70dBm

Check PAM100

Step 4

PAM100
Pin 17
>= -70dBm

Check F102,L112,C142

Step 5

F102
Pin 6,7
>= -75dBm

Check C139,L111,C143
(crack,open,etc)

Step 6

Check UCP200

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