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Flow Chart of Troubleshooting
9-12
9-6. Speaker Part(MP3/Spk)
IIS clocks at 11, 13, 14,
17 pins of U603 are OK?
Stereo Speaker does not work
Check the signal at 25,
26 pins of U603
Check the supply voltage of
U315,U603(3.3V)
Check 27MHz clock of OSC300
END
No
Yes
No
Check the signal at 4, 16
pins of U508
Check 10 pin of U605 is 1.8V
Yes
No
Check the PWM signal at
A3, C3 of U504
Change U504 (D class Audio AMP)
Yes
No
Check the Speaker
contact pins
No
Yes
Peplace Speaker
Yes
Yes