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4-17
Distorted audio and loud noise
No
Yes
No
Yes
Yes
No
No
Distorted audio and
loud noise
Replace Q7
ˈ
Q8
ˈ
Q27
ˈ
Q28
ˈ
Q29
ˈ
Q38
Check Q15
Replace Q26,Q30,Q31
Check whether the muting
transistor Q7
ˈ
Q8
ˈ
Q27
ˈ
Q28
ˈ
Q29
ˈ
Q38 are normal
Yes
Check whether the
muting transistor Q26,
Q30,Q31,are normal
Checking the U10
ˈ
U27
ˈ
U28 leads have not
been broken or open
Correct connection
Replace U2
Check whether the U2 or
U10
ˈ
U27
ˈ
U28 power
supply normal
No
Yes
Check the power supply
vo12V and -12V to
the operation amplifying
Q15 IS normal.
Yes
Check
U10
ˈ
U27
ˈ
U28
Replace U2 or U10
ˈ
U27
ˈ
U28
No
Yes
SACLK waveform
SBCLK waveform
SSLRCK waveform
Trouble shooting chart
If the clock signal ACLK,
ABCK and ALRCK
output by U2 are normal
Remark: Trouble shooting chart for
DVP3156/XX, DVP3166(K)/XX