Samsung gt s7562 Samsung Galaxy S Duos S7562 WCDMA 3G Network Band1 (2100) Rx not Working solution

Samsung gt s7562 Samsung Galaxy S Duos S7562 WCDMA 3G Network Band1 (2100) Rx not Working solution

Samsung gt s7562 Samsung Galaxy S Duos S7562 WCDMA 3G Network Band1 (2100) Rx not Working solution Step by Step

Step 1 

Continuous Rx ON
Channel : 10700 CH
Cell power : -60dBm

Step 2

U100 PIN30 ≥ -65dBm?
(L141 using spectrum analyzer)

Resolder L141 or RFS100
Check RFcable
No
U100 PIN30 ≥ -65dBm?
(L141 using spectrum analyzer)

Step 3

U100 PIN27, L132, L108
≥ -68dBm?

Check the U100`s
Ant. selection diagram

Resolder L132, L108
or Change U100

Check Main chip(UCP300)

Step4

F100 PIN1, L102, C128, L106
≥ -75dBm?

Resolder L102, C128, L10
or Change F100

Step5

L129 ≥ -75dBm?

Change U100

Step 6

Check voltage L129, R111,
L127, C161 = about 2.1V

Resolder L129, R111,
L127, C16

Step7

F106 PIN3,4, L128, C162, C166
≥ -75dBm?

Resolder L128, C162, C166
or Change F106

Step8

Change U100

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Samsung Galaxy GT S  Duos S7562   WCDMA 3G Network Band1 (2100)Rx Solution
Samsung Galaxy GT S Duos S7562  WCDMA 3G Network Band1 (2100) Rx Not Working Solution
Samsung Galaxy GT S Duos S7562  WCDMA 3G Network Band1 (2100) Rx Not receive solution

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