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8-3-3. Audio Working
Lower Speaker Working
Operate speaker
NG
Check
SPK_DWN, SPK_
DWP
Soldering
YES
Speaker break
down?
NO
Signal on in
L308, L309
NO
Signal on in
ether side of
c334?
NO
Change main PBA
NO
YES
YES
YES
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Resolder
Change Speaker
Resolder
L308, L309
SPK ASSY
Replace U312
\
8-9
Level 3 Repair
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