4-17

Distorted audio and loud noise
No
Yes
No
Yes
Yes
No
No
Distorted audio and
loud noise
Replace Q7 ˈQ8ˈQ27ˈQ28ˈ
Q29ˈQ38
Check Q15
Replace Q26,Q30,Q31
Check whether the muting
transistor Q7 ˈQ8ˈQ27ˈ
Q28ˈQ29ˈQ38 are normal
Yes
Check whether the
muting transistor Q26,
Q30,Q31,are normal
Checking the U10ˈU27ˈ
U28 leads have not
been b
r
oken or o
p
en
Correct connection
Replace U2
Check whether the U2 or
U10ˈU27 ˈU28 power
su
pp
l
y
normal
No
Yes
Check the power supply
voltages +12V and -12V to
the operation amplifying
Q15 IS normal.
Yes
Check U10ˈU27ˈU28
Replace U2 or U10ˈU27ˈU28
No
Yes
SACLK waveform SBCLK waveform SSLRCK waveform

Trouble shooting chart

If the clock signal ACLK,
ABCK and ALRCK
out
p
ut b
y
U2 are normal

Remark: Trouble shooting chart for

DVP3156/XX, DVP3166
(
K
)
/XX