Samsung gt s7562 Samsung Galaxy S Duos S7562 Pcs Rx not working Solution

Samsung gt s7562 Samsung Galaxy S Duos S7562 Pcs Rx network not working Schematic , Diagram , Circuit 

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Samsung Galaxy S Duos S7562 Pcs Rx network  not working Solution Step by Step 

Step 1

Continuous Rx ON
Channel : 661 CH

Cell power : -60dBm

Step 2 

U100 PIN30 ≥ -65dBm?

(L141 using spectrum analyzer)

Resolder L141 or RFS100

Check RFcable

Step 3 

U100 PIN23, L119 ≥ -68dBm?

Check the U100`s
Ant. selection diagram

Resolder L119
or Change U100

Check Main chip(UCP300)

Step 4

F103 PIN8,9
L135, L136, L118 ≥ -75dBm?

Resolder L135, L136, L118
or Change F10

Step 5

Change U100

                       

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