Samsung GT-S5830B, Руководство по обслуживанию

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Level 3 Repair
8-20
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8-3-5. KEY Working
z
Volume KEY
Press Volume Key
NG
Check the V/K
Soldering State
It is OK ?
YES
Resoldering the V/K FPCB
NO
Check the V/K
FPCB STATE
It is OK ?
Change V/K FPCB
NO
YES
Change main PBA