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Samsung GT S7562 Galaxy S Duos Audio Not Working Solution

Samsung GT-S7562 Galaxy S Duos Audio Not Working
Solution Schematic, Diagram,Circuit 

Samsung GT-S7562 Galaxy S Duos Audio Not Working
Solution Step By Step
Step 1
Operate speaker
Step 2
Check Speaker
Connector
HDC501
Reconnect connector
Step 3
Signal on in
SPK_OUT_P
& SPK_OUT_N?
Resolder
C527,C508
VR503,VR502
SPK ASSY
Step 4
Signal on in
C406,C407 ?
Resolder
C406,C407
Replace PM400
Resolder or
Replace UCP300
Step 5
Speaker break
down?
Change Speaker
Step 6 
Change main PBA

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