BBK DK2810HD - Page 39

Amplifier has no output
Whether
28V power supply
is normal
2 Troubleshooting flow chart of amplifier has no output is shown in figure3.3.2.2
N
Whether
PWM signal from TAS5508
to amplifier is
normal
Y
Whether
pin 25-31signal of
TAS5508 is
normal
Y
Check peripheral
circuit of TAS5508
N
N
Y
Replace Mt1389
Replace TAS5508
N
Y
Replace TAS5112
Y
Y
Replace MT1389
N
Check 28V power branch
Check peripheral
circuit of TAS5508
Check overcurrent
protection circuit
Whether
there is output in sound
receiving or testing
MIC state
N
N
Y
Whether
pin 25-31 signals of
TAS5508 are
normal
Whether
PWM signal from 5508 to
amplify IC is
normal
Whether
VALID and SD signals of
TAS5112 are
normal
Figure 3.3.2.2 Troubleshooting flow chart of amplifier has no output
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