SX-LX70SW
39
5
6
7
8
5
6
7
8
C
D
F
A
B
E
J
Check the following points when the so
u
rce is
M
u
lti ch.
Yes
LSCD
IC751 (Pin 12)
N
o
N
o
Yes
Is there
abnormality at the
parts and patterns
in the path?
Is there
a a
u
dio data
(with Cch so
u
rce)?
Replace IC701
or IC751.
LSSD
IC751 (Pin 2
8
)
N
o
N
o
Yes
Is there
abnormality at the
parts and patterns
in the path?
Is there
a a
u
dio data
(with Sch so
u
rce)?
Replace IC751
or IC3101.
IC3101 (Pin 30)
N
o
N
o
Yes
Is there
abnormality at the
parts and patterns
in the path?
Is there
a a
u
dio data
(with Sch so
u
rce)?
Replace IC751
or IC3101.
IC751 (Pin 27)
N
o
N
o
Is there
abnormality at the
parts and patterns
in the path?
Is there
a a
u
dio data
(with Cch so
u
rce)?
Replace IC751
or IC3101.
Yes
I3101 (Pin 29)
N
o
N
o
Is there
abnormality at the
parts and patterns
in the path?
Is there
a a
u
dio data
(with Cch so
u
rce)?
Replace IC751
or IC3101.
to CIRCUIT DESCRIPTIO
N
OF DIGITAL
AMP. SECTIO
N
The 1st DSP or the comm
u
nication
path is in fail
u
re.
Is the
voltage of DSP1RST
maintained in 3.3
V
?
(Does it fall to become
0
V
periodically?)
IC101 F2 (R109)
N
o
IRQ1 (
8
9D) (DSP UCOM)
Yes
Step 8: 1st DSP
IC101 B10 (R104)
DSP1RST(20D) (DSP UCOM)
Check the parts and patterns
in the path.
It is likely a Boot Error.
(It is very diffic
u
lt to diagnose which
peripheral part of the DSP is in fail
u
re.)
Yes
Is the voltage
3.3
V
?
N
o
N
o
Does the
voltage become
3.3
V
for a moment
when the inp
u
t stream
is changed?
For the following diagnosis, a digital
oscilloscope m
u
st be
u
sed.
DSP1CS (90D) (DSP UCOM)
DSP CCLK (100D) (DSP UCOM)
DSP CDOUT (99D) (DSP UCOM)
Check the parts and patterns
in the path.
Yes
IC101 A11 (R136)
N
o
Does the
voltage become
0
V
for a moment
when the inp
u
t stream
is changed?
Yes
Check the parts and patterns
in the path.
IC101 B9 (R103)
N
o
Is the clock
signal o
u
tp
u
t while the
voltage is 0
V
?
K
Check the parts and patterns
in the path.
IC101 A9 (R132)
N
o
Is the clock
signal o
u
tp
u
t while the
voltage is 0
V
?
Yes
Содержание AS-LX70
Страница 3: ...SX LX70SW 3 5 6 7 8 5 6 7 8 C D F A B E ...
Страница 15: ...SX LX70SW 15 5 6 7 8 5 6 7 8 C D F A B E ...
Страница 26: ...SX LX70SW 26 1 2 3 4 1 2 3 4 C D F A B E HDMI Assy Check Points HDMI ASSY E Commonness HDMI SIDE B ...
Страница 68: ...SX LX70SW 68 1 2 3 4 1 2 3 4 C D F A B E 9 2 PACKING AS LX70 x 2 Refer to 9 6 REMOTE CONTROL ...
Страница 74: ...SX LX70SW 74 1 2 3 4 1 2 3 4 C D F A B E 9 5 DISPLAY UNIT H G I NON CONTACT SIDE CONTACT SIDE ...
Страница 76: ...SX LX70SW 76 1 2 3 4 1 2 3 4 C D F A B E 9 6 REMOTE CONTROL ...
Страница 97: ...SX LX70SW 97 5 6 7 8 5 6 7 8 C D F A B E ...
Страница 106: ...SX LX70SW 106 1 2 3 4 1 2 3 4 C D F A B E 10 15 POWER SUPPLY UNIT J ...
Страница 107: ...SX LX70SW 107 5 6 7 8 5 6 7 8 C D F A B E CN1001 CN3191 1 2 B 1 7 A J J POWER SUPPLY UNIT AWR7051 ...
Страница 108: ...SX LX70SW 108 1 2 3 4 1 2 3 4 C D F A B E ...
Страница 130: ...SX LX70SW 130 1 2 3 4 1 2 3 4 C D F A B E CN3 CN2 J J POWER SUPPLY ASSY SIDE B SIDE B J ...